Update LKG

lib/tsc.js

@@ -6407,6 +6407,36 @@ var ts;
         return false;
     }
     ts.isDeclarationName = isDeclarationName;
+    function getNameOfDeclaration(declaration) {
+        if (!declaration) {
+            return undefined;
+        }
+        if (declaration.kind === 194) {
+            var kind = getSpecialPropertyAssignmentKind(declaration);
+            var lhs = declaration.left;
+            switch (kind) {
+                case 0:
+                case 2:
+                    return undefined;
+                case 1:
+                    if (lhs.kind === 71) {
+                        return lhs.name;
+                    }
+                    else {
+                        return lhs.expression.name;
+                    }
+                case 4:
+                case 5:
+                    return lhs.name;
+                case 3:
+                    return lhs.expression.name;
+            }
+        }
+        else {
+            return declaration.name;
+        }
+    }
+    ts.getNameOfDeclaration = getNameOfDeclaration;
     function isLiteralComputedPropertyDeclarationName(node) {
         return (node.kind === 9 || node.kind === 8) &&
             node.parent.kind === 144 &&
@@ -6591,7 +6621,8 @@ var ts;
     }
     ts.isStringOrNumericLiteral = isStringOrNumericLiteral;
     function hasDynamicName(declaration) {
-        return declaration.name && isDynamicName(declaration.name);
+        var name = getNameOfDeclaration(declaration);
+        return name && isDynamicName(name);
     }
     ts.hasDynamicName = hasDynamicName;
     function isDynamicName(name) {
@@ -11240,9 +11271,10 @@ var ts;
     }
     ts.getDeclarationName = getDeclarationName;
     function getName(node, allowComments, allowSourceMaps, emitFlags) {
-        if (node.name && ts.isIdentifier(node.name) && !ts.isGeneratedIdentifier(node.name)) {
-            var name = ts.getMutableClone(node.name);
-            emitFlags |= ts.getEmitFlags(node.name);
+        var nodeName = ts.getNameOfDeclaration(node);
+        if (nodeName && ts.isIdentifier(nodeName) && !ts.isGeneratedIdentifier(nodeName)) {
+            var name = ts.getMutableClone(nodeName);
+            emitFlags |= ts.getEmitFlags(nodeName);
             if (!allowSourceMaps)
                 emitFlags |= 48;
             if (!allowComments)
@@ -17431,19 +17463,20 @@ var ts;
             }
         }
         function getDeclarationName(node) {
-            if (node.name) {
+            var name = ts.getNameOfDeclaration(node);
+            if (name) {
                 if (ts.isAmbientModule(node)) {
-                    return ts.isGlobalScopeAugmentation(node) ? "__global" : "\"" + node.name.text + "\"";
+                    return ts.isGlobalScopeAugmentation(node) ? "__global" : "\"" + name.text + "\"";
                 }
-                if (node.name.kind === 144) {
-                    var nameExpression = node.name.expression;
+                if (name.kind === 144) {
+                    var nameExpression = name.expression;
                     if (ts.isStringOrNumericLiteral(nameExpression)) {
                         return nameExpression.text;
                     }
                     ts.Debug.assert(ts.isWellKnownSymbolSyntactically(nameExpression));
                     return ts.getPropertyNameForKnownSymbolName(nameExpression.name.text);
                 }
-                return node.name.text;
+                return name.text;
             }
             switch (node.kind) {
                 case 152:
@@ -17539,9 +17572,9 @@ var ts;
                             }
                         }
                         ts.forEach(symbol.declarations, function (declaration) {
-                            file.bindDiagnostics.push(ts.createDiagnosticForNode(declaration.name || declaration, message_1, getDisplayName(declaration)));
+                            file.bindDiagnostics.push(ts.createDiagnosticForNode(ts.getNameOfDeclaration(declaration) || declaration, message_1, getDisplayName(declaration)));
                         });
-                        file.bindDiagnostics.push(ts.createDiagnosticForNode(node.name || node, message_1, getDisplayName(node)));
+                        file.bindDiagnostics.push(ts.createDiagnosticForNode(ts.getNameOfDeclaration(node) || node, message_1, getDisplayName(node)));
                         symbol = createSymbol(0, name);
                     }
                 }
@@ -21142,16 +21175,16 @@ var ts;
                 recordMergedSymbol(target, source);
             }
             else if (target.flags & 1024) {
-                error(source.declarations[0].name, ts.Diagnostics.Cannot_augment_module_0_with_value_exports_because_it_resolves_to_a_non_module_entity, symbolToString(target));
+                error(ts.getNameOfDeclaration(source.declarations[0]), ts.Diagnostics.Cannot_augment_module_0_with_value_exports_because_it_resolves_to_a_non_module_entity, symbolToString(target));
             }
             else {
                 var message_2 = target.flags & 2 || source.flags & 2
                     ? ts.Diagnostics.Cannot_redeclare_block_scoped_variable_0 : ts.Diagnostics.Duplicate_identifier_0;
                 ts.forEach(source.declarations, function (node) {
-                    error(node.name ? node.name : node, message_2, symbolToString(source));
+                    error(ts.getNameOfDeclaration(node) || node, message_2, symbolToString(source));
                 });
                 ts.forEach(target.declarations, function (node) {
-                    error(node.name ? node.name : node, message_2, symbolToString(source));
+                    error(ts.getNameOfDeclaration(node) || node, message_2, symbolToString(source));
                 });
             }
         }
@@ -21262,7 +21295,8 @@ var ts;
             var useFile = ts.getSourceFileOfNode(usage);
             if (declarationFile !== useFile) {
                 if ((modulekind && (declarationFile.externalModuleIndicator || useFile.externalModuleIndicator)) ||
-                    (!compilerOptions.outFile && !compilerOptions.out)) {
+                    (!compilerOptions.outFile && !compilerOptions.out) ||
+                    ts.isInAmbientContext(declaration)) {
                     return true;
                 }
                 if (isUsedInFunctionOrInstanceProperty(usage, declaration)) {
@@ -21623,13 +21657,13 @@ var ts;
             ts.Debug.assert(declaration !== undefined, "Declaration to checkResolvedBlockScopedVariable is undefined");
             if (!ts.isInAmbientContext(declaration) && !isBlockScopedNameDeclaredBeforeUse(declaration, errorLocation)) {
                 if (result.flags & 2) {
-                    error(errorLocation, ts.Diagnostics.Block_scoped_variable_0_used_before_its_declaration, ts.declarationNameToString(declaration.name));
+                    error(errorLocation, ts.Diagnostics.Block_scoped_variable_0_used_before_its_declaration, ts.declarationNameToString(ts.getNameOfDeclaration(declaration)));
                 }
                 else if (result.flags & 32) {
-                    error(errorLocation, ts.Diagnostics.Class_0_used_before_its_declaration, ts.declarationNameToString(declaration.name));
+                    error(errorLocation, ts.Diagnostics.Class_0_used_before_its_declaration, ts.declarationNameToString(ts.getNameOfDeclaration(declaration)));
                 }
                 else if (result.flags & 384) {
-                    error(errorLocation, ts.Diagnostics.Enum_0_used_before_its_declaration, ts.declarationNameToString(declaration.name));
+                    error(errorLocation, ts.Diagnostics.Enum_0_used_before_its_declaration, ts.declarationNameToString(ts.getNameOfDeclaration(declaration)));
                 }
             }
         }
@@ -22839,8 +22873,9 @@ var ts;
                 function getNameOfSymbol(symbol) {
                     var declaration = ts.firstOrUndefined(symbol.declarations);
                     if (declaration) {
-                        if (declaration.name) {
-                            return ts.declarationNameToString(declaration.name);
+                        var name = ts.getNameOfDeclaration(declaration);
+                        if (name) {
+                            return ts.declarationNameToString(name);
                         }
                         if (declaration.parent && declaration.parent.kind === 226) {
                             return ts.declarationNameToString(declaration.parent.name);
@@ -22921,8 +22956,9 @@ var ts;
         function getNameOfSymbol(symbol) {
             if (symbol.declarations && symbol.declarations.length) {
                 var declaration = symbol.declarations[0];
-                if (declaration.name) {
-                    return ts.declarationNameToString(declaration.name);
+                var name = ts.getNameOfDeclaration(declaration);
+                if (name) {
+                    return ts.declarationNameToString(name);
                 }
                 if (declaration.parent && declaration.parent.kind === 226) {
                     return ts.declarationNameToString(declaration.parent.name);
@@ -25751,8 +25787,9 @@ var ts;
                     type = anyType;
                     if (noImplicitAny) {
                         var declaration = signature.declaration;
-                        if (declaration.name) {
-                            error(declaration.name, ts.Diagnostics._0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions, ts.declarationNameToString(declaration.name));
+                        var name = ts.getNameOfDeclaration(declaration);
+                        if (name) {
+                            error(name, ts.Diagnostics._0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions, ts.declarationNameToString(name));
                         }
                         else {
                             error(declaration, ts.Diagnostics.Function_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions);
@@ -27672,24 +27709,6 @@ var ts;
                 }
                 return 0;
             }
-            function isKnownProperty(type, name, isComparingJsxAttributes) {
-                if (type.flags & 32768) {
-                    var resolved = resolveStructuredTypeMembers(type);
-                    if (resolved.stringIndexInfo || resolved.numberIndexInfo && isNumericLiteralName(name) ||
-                        getPropertyOfType(type, name) || isComparingJsxAttributes && !isUnhyphenatedJsxName(name)) {
-                        return true;
-                    }
-                }
-                else if (type.flags & 196608) {
-                    for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
-                        var t = _a[_i];
-                        if (isKnownProperty(t, name, isComparingJsxAttributes)) {
-                            return true;
-                        }
-                    }
-                }
-                return false;
-            }
             function hasExcessProperties(source, target, reportErrors) {
                 if (maybeTypeOfKind(target, 32768) && !(getObjectFlags(target) & 512)) {
                     var isComparingJsxAttributes = !!(source.flags & 33554432);
@@ -28703,7 +28722,7 @@ var ts;
                 default:
                     diagnostic = ts.Diagnostics.Variable_0_implicitly_has_an_1_type;
             }
-            error(declaration, diagnostic, ts.declarationNameToString(declaration.name), typeAsString);
+            error(declaration, diagnostic, ts.declarationNameToString(ts.getNameOfDeclaration(declaration)), typeAsString);
         }
         function reportErrorsFromWidening(declaration, type) {
             if (produceDiagnostics && noImplicitAny && type.flags & 2097152) {
@@ -30255,7 +30274,7 @@ var ts;
             if (type === autoType || type === autoArrayType) {
                 if (flowType === autoType || flowType === autoArrayType) {
                     if (noImplicitAny) {
-                        error(declaration.name, ts.Diagnostics.Variable_0_implicitly_has_type_1_in_some_locations_where_its_type_cannot_be_determined, symbolToString(symbol), typeToString(flowType));
+                        error(ts.getNameOfDeclaration(declaration), ts.Diagnostics.Variable_0_implicitly_has_type_1_in_some_locations_where_its_type_cannot_be_determined, symbolToString(symbol), typeToString(flowType));
                         error(node, ts.Diagnostics.Variable_0_implicitly_has_an_1_type, symbolToString(symbol), typeToString(flowType));
                     }
                     return convertAutoToAny(flowType);
@@ -31253,6 +31272,8 @@ var ts;
             var spread = emptyObjectType;
             var attributesArray = [];
             var hasSpreadAnyType = false;
+            var explicitlySpecifyChildrenAttribute = false;
+            var jsxChildrenPropertyName = getJsxElementChildrenPropertyname();
             for (var _i = 0, _a = attributes.properties; _i < _a.length; _i++) {
                 var attributeDecl = _a[_i];
                 var member = attributeDecl.symbol;
@@ -31270,6 +31291,9 @@ var ts;
                     attributeSymbol.target = member;
                     attributesTable.set(attributeSymbol.name, attributeSymbol);
                     attributesArray.push(attributeSymbol);
+                    if (attributeDecl.name.text === jsxChildrenPropertyName) {
+                        explicitlySpecifyChildrenAttribute = true;
+                    }
                 }
                 else {
                     ts.Debug.assert(attributeDecl.kind === 255);
@@ -31278,11 +31302,7 @@ var ts;
                         attributesArray = [];
                         attributesTable = ts.createMap();
                     }
-                    var exprType = checkExpression(attributeDecl.expression);
-                    if (!isValidSpreadType(exprType)) {
-                        error(attributeDecl, ts.Diagnostics.Spread_types_may_only_be_created_from_object_types);
-                        hasSpreadAnyType = true;
-                    }
+                    var exprType = getApparentType(checkExpression(attributeDecl.expression));
                     if (isTypeAny(exprType)) {
                         hasSpreadAnyType = true;
                     }
@@ -31321,9 +31341,8 @@ var ts;
                         childrenTypes.push(checkExpression(child, checkMode));
                     }
                 }
-                var jsxChildrenPropertyName = getJsxElementChildrenPropertyname();
                 if (!hasSpreadAnyType && jsxChildrenPropertyName && jsxChildrenPropertyName !== "") {
-                    if (attributesTable.has(jsxChildrenPropertyName)) {
+                    if (explicitlySpecifyChildrenAttribute) {
                         error(attributes, ts.Diagnostics._0_are_specified_twice_The_attribute_named_0_will_be_overwritten, jsxChildrenPropertyName);
                     }
                     var childrenPropSymbol = createSymbol(4 | 134217728, jsxChildrenPropertyName);
@@ -31336,8 +31355,7 @@ var ts;
             return hasSpreadAnyType ? anyType : createJsxAttributesType(attributes.symbol, attributesTable);
             function createJsxAttributesType(symbol, attributesTable) {
                 var result = createAnonymousType(symbol, attributesTable, emptyArray, emptyArray, undefined, undefined);
-                var freshObjectLiteralFlag = compilerOptions.suppressExcessPropertyErrors ? 0 : 1048576;
-                result.flags |= 33554432 | 4194304 | freshObjectLiteralFlag;
+                result.flags |= 33554432 | 4194304;
                 result.objectFlags |= 128;
                 return result;
             }
@@ -31437,6 +31455,20 @@ var ts;
             }
             return _jsxElementChildrenPropertyName;
         }
+        function getApparentTypeOfJsxPropsType(propsType) {
+            if (!propsType) {
+                return undefined;
+            }
+            if (propsType.flags & 131072) {
+                var propsApparentType = [];
+                for (var _i = 0, _a = propsType.types; _i < _a.length; _i++) {
+                    var t = _a[_i];
+                    propsApparentType.push(getApparentType(t));
+                }
+                return getIntersectionType(propsApparentType);
+            }
+            return getApparentType(propsType);
+        }
         function defaultTryGetJsxStatelessFunctionAttributesType(openingLikeElement, elementType, elemInstanceType, elementClassType) {
             ts.Debug.assert(!(elementType.flags & 65536));
             if (!elementClassType || !isTypeAssignableTo(elemInstanceType, elementClassType)) {
@@ -31446,6 +31478,7 @@ var ts;
                     if (callSignature !== unknownSignature) {
                         var callReturnType = callSignature && getReturnTypeOfSignature(callSignature);
                         var paramType = callReturnType && (callSignature.parameters.length === 0 ? emptyObjectType : getTypeOfSymbol(callSignature.parameters[0]));
+                        paramType = getApparentTypeOfJsxPropsType(paramType);
                         if (callReturnType && isTypeAssignableTo(callReturnType, jsxStatelessElementType)) {
                             var intrinsicAttributes = getJsxType(JsxNames.IntrinsicAttributes);
                             if (intrinsicAttributes !== unknownType) {
@@ -31471,6 +31504,7 @@ var ts;
                         var candidate = candidatesOutArray_1[_i];
                         var callReturnType = getReturnTypeOfSignature(candidate);
                         var paramType = callReturnType && (candidate.parameters.length === 0 ? emptyObjectType : getTypeOfSymbol(candidate.parameters[0]));
+                        paramType = getApparentTypeOfJsxPropsType(paramType);
                         if (callReturnType && isTypeAssignableTo(callReturnType, jsxStatelessElementType)) {
                             var shouldBeCandidate = true;
                             for (var _a = 0, _b = openingLikeElement.attributes.properties; _a < _b.length; _a++) {
@@ -31674,6 +31708,24 @@ var ts;
             }
             checkJsxAttributesAssignableToTagNameAttributes(node);
         }
+        function isKnownProperty(targetType, name, isComparingJsxAttributes) {
+            if (targetType.flags & 32768) {
+                var resolved = resolveStructuredTypeMembers(targetType);
+                if (resolved.stringIndexInfo || resolved.numberIndexInfo && isNumericLiteralName(name) ||
+                    getPropertyOfType(targetType, name) || isComparingJsxAttributes && !isUnhyphenatedJsxName(name)) {
+                    return true;
+                }
+            }
+            else if (targetType.flags & 196608) {
+                for (var _i = 0, _a = targetType.types; _i < _a.length; _i++) {
+                    var t = _a[_i];
+                    if (isKnownProperty(t, name, isComparingJsxAttributes)) {
+                        return true;
+                    }
+                }
+            }
+            return false;
+        }
         function checkJsxAttributesAssignableToTagNameAttributes(openingLikeElement) {
             var targetAttributesType = isJsxIntrinsicIdentifier(openingLikeElement.tagName) ?
                 getIntrinsicAttributesTypeFromJsxOpeningLikeElement(openingLikeElement) :
@@ -31685,7 +31737,16 @@ var ts;
                 error(openingLikeElement, ts.Diagnostics.JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property, getJsxElementPropertiesName());
             }
             else {
-                checkTypeAssignableTo(sourceAttributesType, targetAttributesType, openingLikeElement.attributes.properties.length > 0 ? openingLikeElement.attributes : openingLikeElement);
+                var isSourceAttributeTypeAssignableToTarget = checkTypeAssignableTo(sourceAttributesType, targetAttributesType, openingLikeElement.attributes.properties.length > 0 ? openingLikeElement.attributes : openingLikeElement);
+                if (isSourceAttributeTypeAssignableToTarget && !isTypeAny(sourceAttributesType) && !isTypeAny(targetAttributesType)) {
+                    for (var _i = 0, _a = openingLikeElement.attributes.properties; _i < _a.length; _i++) {
+                        var attribute = _a[_i];
+                        if (ts.isJsxAttribute(attribute) && !isKnownProperty(targetAttributesType, attribute.name.text, true)) {
+                            error(attribute, ts.Diagnostics.Property_0_does_not_exist_on_type_1, attribute.name.text, typeToString(targetAttributesType));
+                            break;
+                        }
+                    }
+                }
             }
         }
         function checkJsxExpression(node, checkMode) {
@@ -32661,7 +32722,7 @@ var ts;
             }
             var valueDecl = expressionType.symbol && getClassLikeDeclarationOfSymbol(expressionType.symbol);
             if (valueDecl && ts.getModifierFlags(valueDecl) & 128) {
-                error(node, ts.Diagnostics.Cannot_create_an_instance_of_the_abstract_class_0, ts.declarationNameToString(valueDecl.name));
+                error(node, ts.Diagnostics.Cannot_create_an_instance_of_the_abstract_class_0, ts.declarationNameToString(ts.getNameOfDeclaration(valueDecl)));
                 return resolveErrorCall(node);
             }
             if (isTypeAny(expressionType)) {
@@ -32997,10 +33058,10 @@ var ts;
             var links = getSymbolLinks(parameter);
             if (!links.type) {
                 links.type = instantiateType(contextualType, mapper);
+                var name = ts.getNameOfDeclaration(parameter.valueDeclaration);
                 if (links.type === emptyObjectType &&
-                    (parameter.valueDeclaration.name.kind === 174 ||
-                        parameter.valueDeclaration.name.kind === 175)) {
-                    links.type = getTypeFromBindingPattern(parameter.valueDeclaration.name);
+                    (name.kind === 174 || name.kind === 175)) {
+                    links.type = getTypeFromBindingPattern(name);
                 }
                 assignBindingElementTypes(parameter.valueDeclaration);
             }
@@ -34426,7 +34487,7 @@ var ts;
                             continue;
                     }
                     if (names.get(memberName)) {
-                        error(member.symbol.valueDeclaration.name, ts.Diagnostics.Duplicate_identifier_0, memberName);
+                        error(ts.getNameOfDeclaration(member.symbol.valueDeclaration), ts.Diagnostics.Duplicate_identifier_0, memberName);
                         error(member.name, ts.Diagnostics.Duplicate_identifier_0, memberName);
                     }
                     else {
@@ -34500,7 +34561,8 @@ var ts;
                 return;
             }
             function containsSuperCallAsComputedPropertyName(n) {
-                return n.name && containsSuperCall(n.name);
+                var name = ts.getNameOfDeclaration(n);
+                return name && containsSuperCall(name);
             }
             function containsSuperCall(n) {
                 if (ts.isSuperCall(n)) {
@@ -34727,16 +34789,16 @@ var ts;
                     ts.forEach(overloads, function (o) {
                         var deviation = getEffectiveDeclarationFlags(o, flagsToCheck) ^ canonicalFlags_1;
                         if (deviation & 1) {
-                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_exported_or_non_exported);
+                            error(ts.getNameOfDeclaration(o), ts.Diagnostics.Overload_signatures_must_all_be_exported_or_non_exported);
                         }
                         else if (deviation & 2) {
-                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_ambient_or_non_ambient);
+                            error(ts.getNameOfDeclaration(o), ts.Diagnostics.Overload_signatures_must_all_be_ambient_or_non_ambient);
                         }
                         else if (deviation & (8 | 16)) {
-                            error(o.name || o, ts.Diagnostics.Overload_signatures_must_all_be_public_private_or_protected);
+                            error(ts.getNameOfDeclaration(o) || o, ts.Diagnostics.Overload_signatures_must_all_be_public_private_or_protected);
                         }
                         else if (deviation & 128) {
-                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_abstract_or_non_abstract);
+                            error(ts.getNameOfDeclaration(o), ts.Diagnostics.Overload_signatures_must_all_be_abstract_or_non_abstract);
                         }
                     });
                 }
@@ -34747,7 +34809,7 @@ var ts;
                     ts.forEach(overloads, function (o) {
                         var deviation = ts.hasQuestionToken(o) !== canonicalHasQuestionToken_1;
                         if (deviation) {
-                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_optional_or_required);
+                            error(ts.getNameOfDeclaration(o), ts.Diagnostics.Overload_signatures_must_all_be_optional_or_required);
                         }
                     });
                 }
@@ -34855,7 +34917,7 @@ var ts;
             }
             if (duplicateFunctionDeclaration) {
                 ts.forEach(declarations, function (declaration) {
-                    error(declaration.name, ts.Diagnostics.Duplicate_function_implementation);
+                    error(ts.getNameOfDeclaration(declaration), ts.Diagnostics.Duplicate_function_implementation);
                 });
             }
             if (lastSeenNonAmbientDeclaration && !lastSeenNonAmbientDeclaration.body &&
@@ -34918,11 +34980,12 @@ var ts;
                 for (var _b = 0, _c = symbol.declarations; _b < _c.length; _b++) {
                     var d = _c[_b];
                     var declarationSpaces = getDeclarationSpaces(d);
+                    var name = ts.getNameOfDeclaration(d);
                     if (declarationSpaces & commonDeclarationSpacesForDefaultAndNonDefault) {
-                        error(d.name, ts.Diagnostics.Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_default_0_declaration_instead, ts.declarationNameToString(d.name));
+                        error(name, ts.Diagnostics.Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_default_0_declaration_instead, ts.declarationNameToString(name));
                     }
                     else if (declarationSpaces & commonDeclarationSpacesForExportsAndLocals) {
-                        error(d.name, ts.Diagnostics.Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local, ts.declarationNameToString(d.name));
+                        error(name, ts.Diagnostics.Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local, ts.declarationNameToString(name));
                     }
                 }
             }
@@ -35284,15 +35347,16 @@ var ts;
                     if (!local.isReferenced) {
                         if (local.valueDeclaration && ts.getRootDeclaration(local.valueDeclaration).kind === 146) {
                             var parameter = ts.getRootDeclaration(local.valueDeclaration);
+                            var name = ts.getNameOfDeclaration(local.valueDeclaration);
                             if (compilerOptions.noUnusedParameters &&
                                 !ts.isParameterPropertyDeclaration(parameter) &&
                                 !ts.parameterIsThisKeyword(parameter) &&
-                                !parameterNameStartsWithUnderscore(local.valueDeclaration.name)) {
-                                error(local.valueDeclaration.name, ts.Diagnostics._0_is_declared_but_never_used, local.name);
+                                !parameterNameStartsWithUnderscore(name)) {
+                                error(name, ts.Diagnostics._0_is_declared_but_never_used, local.name);
                             }
                         }
                         else if (compilerOptions.noUnusedLocals) {
-                            ts.forEach(local.declarations, function (d) { return errorUnusedLocal(d.name || d, local.name); });
+                            ts.forEach(local.declarations, function (d) { return errorUnusedLocal(ts.getNameOfDeclaration(d) || d, local.name); });
                         }
                     }
                 });
@@ -35370,7 +35434,7 @@ var ts;
                         for (var _i = 0, _a = local.declarations; _i < _a.length; _i++) {
                             var declaration = _a[_i];
                             if (!ts.isAmbientModule(declaration)) {
-                                errorUnusedLocal(declaration.name, local.name);
+                                errorUnusedLocal(ts.getNameOfDeclaration(declaration), local.name);
                             }
                         }
                     }
@@ -35432,7 +35496,7 @@ var ts;
                 if (getNodeCheckFlags(current) & 4) {
                     var isDeclaration_1 = node.kind !== 71;
                     if (isDeclaration_1) {
-                        error(node.name, ts.Diagnostics.Duplicate_identifier_this_Compiler_uses_variable_declaration_this_to_capture_this_reference);
+                        error(ts.getNameOfDeclaration(node), ts.Diagnostics.Duplicate_identifier_this_Compiler_uses_variable_declaration_this_to_capture_this_reference);
                     }
                     else {
                         error(node, ts.Diagnostics.Expression_resolves_to_variable_declaration_this_that_compiler_uses_to_capture_this_reference);
@@ -35446,7 +35510,7 @@ var ts;
                 if (getNodeCheckFlags(current) & 8) {
                     var isDeclaration_2 = node.kind !== 71;
                     if (isDeclaration_2) {
-                        error(node.name, ts.Diagnostics.Duplicate_identifier_newTarget_Compiler_uses_variable_declaration_newTarget_to_capture_new_target_meta_property_reference);
+                        error(ts.getNameOfDeclaration(node), ts.Diagnostics.Duplicate_identifier_newTarget_Compiler_uses_variable_declaration_newTarget_to_capture_new_target_meta_property_reference);
                     }
                     else {
                         error(node, ts.Diagnostics.Expression_resolves_to_variable_declaration_newTarget_that_compiler_uses_to_capture_new_target_meta_property_reference);
@@ -35642,7 +35706,7 @@ var ts;
                     checkTypeAssignableTo(checkExpressionCached(node.initializer), declarationType, node, undefined);
                 }
                 if (!areDeclarationFlagsIdentical(node, symbol.valueDeclaration)) {
-                    error(symbol.valueDeclaration.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_modifiers, ts.declarationNameToString(node.name));
+                    error(ts.getNameOfDeclaration(symbol.valueDeclaration), ts.Diagnostics.All_declarations_of_0_must_have_identical_modifiers, ts.declarationNameToString(node.name));
                     error(node.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_modifiers, ts.declarationNameToString(node.name));
                 }
             }
@@ -36203,13 +36267,13 @@ var ts;
                     return;
                 }
                 var propDeclaration = prop.valueDeclaration;
-                if (indexKind === 1 && !(propDeclaration ? isNumericName(propDeclaration.name) : isNumericLiteralName(prop.name))) {
+                if (indexKind === 1 && !(propDeclaration ? isNumericName(ts.getNameOfDeclaration(propDeclaration)) : isNumericLiteralName(prop.name))) {
                     return;
                 }
                 var errorNode;
                 if (propDeclaration &&
-                    (ts.getSpecialPropertyAssignmentKind(propDeclaration) === 4 ||
-                        propDeclaration.name.kind === 144 ||
+                    (propDeclaration.kind === 194 ||
+                        ts.getNameOfDeclaration(propDeclaration).kind === 144 ||
                         prop.parent === containingType.symbol)) {
                     errorNode = propDeclaration;
                 }
@@ -36484,7 +36548,7 @@ var ts;
                         else {
                             errorMessage = ts.Diagnostics.Class_0_defines_instance_member_accessor_1_but_extended_class_2_defines_it_as_instance_member_function;
                         }
-                        error(derived.valueDeclaration.name || derived.valueDeclaration, errorMessage, typeToString(baseType), symbolToString(base), typeToString(type));
+                        error(ts.getNameOfDeclaration(derived.valueDeclaration) || derived.valueDeclaration, errorMessage, typeToString(baseType), symbolToString(base), typeToString(type));
                     }
                 }
             }
@@ -36752,7 +36816,7 @@ var ts;
                 if (enumSymbol.declarations.length > 1) {
                     ts.forEach(enumSymbol.declarations, function (decl) {
                         if (ts.isConstEnumDeclaration(decl) !== enumIsConst) {
-                            error(decl.name, ts.Diagnostics.Enum_declarations_must_all_be_const_or_non_const);
+                            error(ts.getNameOfDeclaration(decl), ts.Diagnostics.Enum_declarations_must_all_be_const_or_non_const);
                         }
                     });
                 }
@@ -45161,7 +45225,7 @@ var ts;
             if (enabledSubstitutions & 2 && !ts.isInternalName(node)) {
                 var declaration = resolver.getReferencedDeclarationWithCollidingName(node);
                 if (declaration && !(ts.isClassLike(declaration) && isPartOfClassBody(declaration, node))) {
-                    return ts.setTextRange(ts.getGeneratedNameForNode(declaration.name), node);
+                    return ts.setTextRange(ts.getGeneratedNameForNode(ts.getNameOfDeclaration(declaration)), node);
                 }
             }
             return node;
@@ -49384,7 +49448,7 @@ var ts;
         var errorNameNode;
         var emitJsDocComments = compilerOptions.removeComments ? ts.noop : writeJsDocComments;
         var emit = compilerOptions.stripInternal ? stripInternal : emitNode;
-        var noDeclare;
+        var needsDeclare = true;
         var moduleElementDeclarationEmitInfo = [];
         var asynchronousSubModuleDeclarationEmitInfo;
         var referencesOutput = "";
@@ -49409,11 +49473,11 @@ var ts;
             }
             resultHasExternalModuleIndicator = false;
             if (!isBundledEmit || !ts.isExternalModule(sourceFile)) {
-                noDeclare = false;
+                needsDeclare = true;
                 emitSourceFile(sourceFile);
             }
             else if (ts.isExternalModule(sourceFile)) {
-                noDeclare = true;
+                needsDeclare = false;
                 write("declare module \"" + ts.getResolvedExternalModuleName(host, sourceFile) + "\" {");
                 writeLine();
                 increaseIndent();
@@ -49830,9 +49894,9 @@ var ts;
                 }
             }
         }
-        function emitTempVariableDeclaration(expr, baseName, diagnostic) {
+        function emitTempVariableDeclaration(expr, baseName, diagnostic, needsDeclare) {
             var tempVarName = getExportTempVariableName(baseName);
-            if (!noDeclare) {
+            if (needsDeclare) {
                 write("declare ");
             }
             write("const ");
@@ -49853,7 +49917,7 @@ var ts;
                 var tempVarName = emitTempVariableDeclaration(node.expression, "_default", {
                     diagnosticMessage: ts.Diagnostics.Default_export_of_the_module_has_or_is_using_private_name_0,
                     errorNode: node
-                });
+                }, needsDeclare);
                 write(node.isExportEquals ? "export = " : "export default ");
                 write(tempVarName);
             }
@@ -49932,7 +49996,7 @@ var ts;
                 if (modifiers & 512) {
                     write("default ");
                 }
-                else if (node.kind !== 230 && !noDeclare) {
+                else if (node.kind !== 230 && needsDeclare) {
                     write("declare ");
                 }
             }
@@ -50282,7 +50346,7 @@ var ts;
                     return {
                         diagnosticMessage: diagnosticMessage,
                         errorNode: node,
-                        typeName: node.parent.parent.name
+                        typeName: ts.getNameOfDeclaration(node.parent.parent)
                     };
                 }
             }
@@ -50308,7 +50372,7 @@ var ts;
                         diagnosticMessage: ts.Diagnostics.extends_clause_of_exported_class_0_has_or_is_using_private_name_1,
                         errorNode: baseTypeNode,
                         typeName: node.name
-                    });
+                    }, !ts.findAncestor(node, function (n) { return n.kind === 233; }));
             }
             emitJsDocComments(node);
             emitModuleElementDeclarationFlags(node);

lib/tsserver.js

@@ -6598,6 +6598,36 @@ var ts;
         return false;
     }
     ts.isDeclarationName = isDeclarationName;
+    function getNameOfDeclaration(declaration) {
+        if (!declaration) {
+            return undefined;
+        }
+        if (declaration.kind === 194) {
+            var kind = getSpecialPropertyAssignmentKind(declaration);
+            var lhs = declaration.left;
+            switch (kind) {
+                case 0:
+                case 2:
+                    return undefined;
+                case 1:
+                    if (lhs.kind === 71) {
+                        return lhs.name;
+                    }
+                    else {
+                        return lhs.expression.name;
+                    }
+                case 4:
+                case 5:
+                    return lhs.name;
+                case 3:
+                    return lhs.expression.name;
+            }
+        }
+        else {
+            return declaration.name;
+        }
+    }
+    ts.getNameOfDeclaration = getNameOfDeclaration;
     function isLiteralComputedPropertyDeclarationName(node) {
         return (node.kind === 9 || node.kind === 8) &&
             node.parent.kind === 144 &&
@@ -6790,7 +6820,8 @@ var ts;
     }
     ts.isStringOrNumericLiteral = isStringOrNumericLiteral;
     function hasDynamicName(declaration) {
-        return declaration.name && isDynamicName(declaration.name);
+        var name = getNameOfDeclaration(declaration);
+        return name && isDynamicName(name);
     }
     ts.hasDynamicName = hasDynamicName;
     function isDynamicName(name) {
@@ -13021,9 +13052,10 @@ var ts;
     }
     ts.getDeclarationName = getDeclarationName;
     function getName(node, allowComments, allowSourceMaps, emitFlags) {
-        if (node.name && ts.isIdentifier(node.name) && !ts.isGeneratedIdentifier(node.name)) {
-            var name = ts.getMutableClone(node.name);
-            emitFlags |= ts.getEmitFlags(node.name);
+        var nodeName = ts.getNameOfDeclaration(node);
+        if (nodeName && ts.isIdentifier(nodeName) && !ts.isGeneratedIdentifier(nodeName)) {
+            var name = ts.getMutableClone(nodeName);
+            emitFlags |= ts.getEmitFlags(nodeName);
             if (!allowSourceMaps)
                 emitFlags |= 48;
             if (!allowComments)
@@ -19284,19 +19316,20 @@ var ts;
             }
         }
         function getDeclarationName(node) {
-            if (node.name) {
+            var name = ts.getNameOfDeclaration(node);
+            if (name) {
                 if (ts.isAmbientModule(node)) {
-                    return ts.isGlobalScopeAugmentation(node) ? "__global" : "\"" + node.name.text + "\"";
+                    return ts.isGlobalScopeAugmentation(node) ? "__global" : "\"" + name.text + "\"";
                 }
-                if (node.name.kind === 144) {
-                    var nameExpression = node.name.expression;
+                if (name.kind === 144) {
+                    var nameExpression = name.expression;
                     if (ts.isStringOrNumericLiteral(nameExpression)) {
                         return nameExpression.text;
                     }
                     ts.Debug.assert(ts.isWellKnownSymbolSyntactically(nameExpression));
                     return ts.getPropertyNameForKnownSymbolName(nameExpression.name.text);
                 }
-                return node.name.text;
+                return name.text;
             }
             switch (node.kind) {
                 case 152:
@@ -19392,9 +19425,9 @@ var ts;
                             }
                         }
                         ts.forEach(symbol.declarations, function (declaration) {
-                            file.bindDiagnostics.push(ts.createDiagnosticForNode(declaration.name || declaration, message_1, getDisplayName(declaration)));
+                            file.bindDiagnostics.push(ts.createDiagnosticForNode(ts.getNameOfDeclaration(declaration) || declaration, message_1, getDisplayName(declaration)));
                         });
-                        file.bindDiagnostics.push(ts.createDiagnosticForNode(node.name || node, message_1, getDisplayName(node)));
+                        file.bindDiagnostics.push(ts.createDiagnosticForNode(ts.getNameOfDeclaration(node) || node, message_1, getDisplayName(node)));
                         symbol = createSymbol(0, name);
                     }
                 }
@@ -22306,16 +22339,16 @@ var ts;
                 recordMergedSymbol(target, source);
             }
             else if (target.flags & 1024) {
-                error(source.declarations[0].name, ts.Diagnostics.Cannot_augment_module_0_with_value_exports_because_it_resolves_to_a_non_module_entity, symbolToString(target));
+                error(ts.getNameOfDeclaration(source.declarations[0]), ts.Diagnostics.Cannot_augment_module_0_with_value_exports_because_it_resolves_to_a_non_module_entity, symbolToString(target));
             }
             else {
                 var message_2 = target.flags & 2 || source.flags & 2
                     ? ts.Diagnostics.Cannot_redeclare_block_scoped_variable_0 : ts.Diagnostics.Duplicate_identifier_0;
                 ts.forEach(source.declarations, function (node) {
-                    error(node.name ? node.name : node, message_2, symbolToString(source));
+                    error(ts.getNameOfDeclaration(node) || node, message_2, symbolToString(source));
                 });
                 ts.forEach(target.declarations, function (node) {
-                    error(node.name ? node.name : node, message_2, symbolToString(source));
+                    error(ts.getNameOfDeclaration(node) || node, message_2, symbolToString(source));
                 });
             }
         }
@@ -22426,7 +22459,8 @@ var ts;
             var useFile = ts.getSourceFileOfNode(usage);
             if (declarationFile !== useFile) {
                 if ((modulekind && (declarationFile.externalModuleIndicator || useFile.externalModuleIndicator)) ||
-                    (!compilerOptions.outFile && !compilerOptions.out)) {
+                    (!compilerOptions.outFile && !compilerOptions.out) ||
+                    ts.isInAmbientContext(declaration)) {
                     return true;
                 }
                 if (isUsedInFunctionOrInstanceProperty(usage, declaration)) {
@@ -22787,13 +22821,13 @@ var ts;
             ts.Debug.assert(declaration !== undefined, "Declaration to checkResolvedBlockScopedVariable is undefined");
             if (!ts.isInAmbientContext(declaration) && !isBlockScopedNameDeclaredBeforeUse(declaration, errorLocation)) {
                 if (result.flags & 2) {
-                    error(errorLocation, ts.Diagnostics.Block_scoped_variable_0_used_before_its_declaration, ts.declarationNameToString(declaration.name));
+                    error(errorLocation, ts.Diagnostics.Block_scoped_variable_0_used_before_its_declaration, ts.declarationNameToString(ts.getNameOfDeclaration(declaration)));
                 }
                 else if (result.flags & 32) {
-                    error(errorLocation, ts.Diagnostics.Class_0_used_before_its_declaration, ts.declarationNameToString(declaration.name));
+                    error(errorLocation, ts.Diagnostics.Class_0_used_before_its_declaration, ts.declarationNameToString(ts.getNameOfDeclaration(declaration)));
                 }
                 else if (result.flags & 384) {
-                    error(errorLocation, ts.Diagnostics.Enum_0_used_before_its_declaration, ts.declarationNameToString(declaration.name));
+                    error(errorLocation, ts.Diagnostics.Enum_0_used_before_its_declaration, ts.declarationNameToString(ts.getNameOfDeclaration(declaration)));
                 }
             }
         }
@@ -24003,8 +24037,9 @@ var ts;
                 function getNameOfSymbol(symbol) {
                     var declaration = ts.firstOrUndefined(symbol.declarations);
                     if (declaration) {
-                        if (declaration.name) {
-                            return ts.declarationNameToString(declaration.name);
+                        var name = ts.getNameOfDeclaration(declaration);
+                        if (name) {
+                            return ts.declarationNameToString(name);
                         }
                         if (declaration.parent && declaration.parent.kind === 226) {
                             return ts.declarationNameToString(declaration.parent.name);
@@ -24085,8 +24120,9 @@ var ts;
         function getNameOfSymbol(symbol) {
             if (symbol.declarations && symbol.declarations.length) {
                 var declaration = symbol.declarations[0];
-                if (declaration.name) {
-                    return ts.declarationNameToString(declaration.name);
+                var name = ts.getNameOfDeclaration(declaration);
+                if (name) {
+                    return ts.declarationNameToString(name);
                 }
                 if (declaration.parent && declaration.parent.kind === 226) {
                     return ts.declarationNameToString(declaration.parent.name);
@@ -26915,8 +26951,9 @@ var ts;
                     type = anyType;
                     if (noImplicitAny) {
                         var declaration = signature.declaration;
-                        if (declaration.name) {
-                            error(declaration.name, ts.Diagnostics._0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions, ts.declarationNameToString(declaration.name));
+                        var name = ts.getNameOfDeclaration(declaration);
+                        if (name) {
+                            error(name, ts.Diagnostics._0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions, ts.declarationNameToString(name));
                         }
                         else {
                             error(declaration, ts.Diagnostics.Function_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions);
@@ -28836,24 +28873,6 @@ var ts;
                 }
                 return 0;
             }
-            function isKnownProperty(type, name, isComparingJsxAttributes) {
-                if (type.flags & 32768) {
-                    var resolved = resolveStructuredTypeMembers(type);
-                    if (resolved.stringIndexInfo || resolved.numberIndexInfo && isNumericLiteralName(name) ||
-                        getPropertyOfType(type, name) || isComparingJsxAttributes && !isUnhyphenatedJsxName(name)) {
-                        return true;
-                    }
-                }
-                else if (type.flags & 196608) {
-                    for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
-                        var t = _a[_i];
-                        if (isKnownProperty(t, name, isComparingJsxAttributes)) {
-                            return true;
-                        }
-                    }
-                }
-                return false;
-            }
             function hasExcessProperties(source, target, reportErrors) {
                 if (maybeTypeOfKind(target, 32768) && !(getObjectFlags(target) & 512)) {
                     var isComparingJsxAttributes = !!(source.flags & 33554432);
@@ -29867,7 +29886,7 @@ var ts;
                 default:
                     diagnostic = ts.Diagnostics.Variable_0_implicitly_has_an_1_type;
             }
-            error(declaration, diagnostic, ts.declarationNameToString(declaration.name), typeAsString);
+            error(declaration, diagnostic, ts.declarationNameToString(ts.getNameOfDeclaration(declaration)), typeAsString);
         }
         function reportErrorsFromWidening(declaration, type) {
             if (produceDiagnostics && noImplicitAny && type.flags & 2097152) {
@@ -31419,7 +31438,7 @@ var ts;
             if (type === autoType || type === autoArrayType) {
                 if (flowType === autoType || flowType === autoArrayType) {
                     if (noImplicitAny) {
-                        error(declaration.name, ts.Diagnostics.Variable_0_implicitly_has_type_1_in_some_locations_where_its_type_cannot_be_determined, symbolToString(symbol), typeToString(flowType));
+                        error(ts.getNameOfDeclaration(declaration), ts.Diagnostics.Variable_0_implicitly_has_type_1_in_some_locations_where_its_type_cannot_be_determined, symbolToString(symbol), typeToString(flowType));
                         error(node, ts.Diagnostics.Variable_0_implicitly_has_an_1_type, symbolToString(symbol), typeToString(flowType));
                     }
                     return convertAutoToAny(flowType);
@@ -32417,6 +32436,8 @@ var ts;
             var spread = emptyObjectType;
             var attributesArray = [];
             var hasSpreadAnyType = false;
+            var explicitlySpecifyChildrenAttribute = false;
+            var jsxChildrenPropertyName = getJsxElementChildrenPropertyname();
             for (var _i = 0, _a = attributes.properties; _i < _a.length; _i++) {
                 var attributeDecl = _a[_i];
                 var member = attributeDecl.symbol;
@@ -32434,6 +32455,9 @@ var ts;
                     attributeSymbol.target = member;
                     attributesTable.set(attributeSymbol.name, attributeSymbol);
                     attributesArray.push(attributeSymbol);
+                    if (attributeDecl.name.text === jsxChildrenPropertyName) {
+                        explicitlySpecifyChildrenAttribute = true;
+                    }
                 }
                 else {
                     ts.Debug.assert(attributeDecl.kind === 255);
@@ -32442,11 +32466,7 @@ var ts;
                         attributesArray = [];
                         attributesTable = ts.createMap();
                     }
-                    var exprType = checkExpression(attributeDecl.expression);
-                    if (!isValidSpreadType(exprType)) {
-                        error(attributeDecl, ts.Diagnostics.Spread_types_may_only_be_created_from_object_types);
-                        hasSpreadAnyType = true;
-                    }
+                    var exprType = getApparentType(checkExpression(attributeDecl.expression));
                     if (isTypeAny(exprType)) {
                         hasSpreadAnyType = true;
                     }
@@ -32485,9 +32505,8 @@ var ts;
                         childrenTypes.push(checkExpression(child, checkMode));
                     }
                 }
-                var jsxChildrenPropertyName = getJsxElementChildrenPropertyname();
                 if (!hasSpreadAnyType && jsxChildrenPropertyName && jsxChildrenPropertyName !== "") {
-                    if (attributesTable.has(jsxChildrenPropertyName)) {
+                    if (explicitlySpecifyChildrenAttribute) {
                         error(attributes, ts.Diagnostics._0_are_specified_twice_The_attribute_named_0_will_be_overwritten, jsxChildrenPropertyName);
                     }
                     var childrenPropSymbol = createSymbol(4 | 134217728, jsxChildrenPropertyName);
@@ -32500,8 +32519,7 @@ var ts;
             return hasSpreadAnyType ? anyType : createJsxAttributesType(attributes.symbol, attributesTable);
             function createJsxAttributesType(symbol, attributesTable) {
                 var result = createAnonymousType(symbol, attributesTable, emptyArray, emptyArray, undefined, undefined);
-                var freshObjectLiteralFlag = compilerOptions.suppressExcessPropertyErrors ? 0 : 1048576;
-                result.flags |= 33554432 | 4194304 | freshObjectLiteralFlag;
+                result.flags |= 33554432 | 4194304;
                 result.objectFlags |= 128;
                 return result;
             }
@@ -32601,6 +32619,20 @@ var ts;
             }
             return _jsxElementChildrenPropertyName;
         }
+        function getApparentTypeOfJsxPropsType(propsType) {
+            if (!propsType) {
+                return undefined;
+            }
+            if (propsType.flags & 131072) {
+                var propsApparentType = [];
+                for (var _i = 0, _a = propsType.types; _i < _a.length; _i++) {
+                    var t = _a[_i];
+                    propsApparentType.push(getApparentType(t));
+                }
+                return getIntersectionType(propsApparentType);
+            }
+            return getApparentType(propsType);
+        }
         function defaultTryGetJsxStatelessFunctionAttributesType(openingLikeElement, elementType, elemInstanceType, elementClassType) {
             ts.Debug.assert(!(elementType.flags & 65536));
             if (!elementClassType || !isTypeAssignableTo(elemInstanceType, elementClassType)) {
@@ -32610,6 +32642,7 @@ var ts;
                     if (callSignature !== unknownSignature) {
                         var callReturnType = callSignature && getReturnTypeOfSignature(callSignature);
                         var paramType = callReturnType && (callSignature.parameters.length === 0 ? emptyObjectType : getTypeOfSymbol(callSignature.parameters[0]));
+                        paramType = getApparentTypeOfJsxPropsType(paramType);
                         if (callReturnType && isTypeAssignableTo(callReturnType, jsxStatelessElementType)) {
                             var intrinsicAttributes = getJsxType(JsxNames.IntrinsicAttributes);
                             if (intrinsicAttributes !== unknownType) {
@@ -32635,6 +32668,7 @@ var ts;
                         var candidate = candidatesOutArray_1[_i];
                         var callReturnType = getReturnTypeOfSignature(candidate);
                         var paramType = callReturnType && (candidate.parameters.length === 0 ? emptyObjectType : getTypeOfSymbol(candidate.parameters[0]));
+                        paramType = getApparentTypeOfJsxPropsType(paramType);
                         if (callReturnType && isTypeAssignableTo(callReturnType, jsxStatelessElementType)) {
                             var shouldBeCandidate = true;
                             for (var _a = 0, _b = openingLikeElement.attributes.properties; _a < _b.length; _a++) {
@@ -32838,6 +32872,24 @@ var ts;
             }
             checkJsxAttributesAssignableToTagNameAttributes(node);
         }
+        function isKnownProperty(targetType, name, isComparingJsxAttributes) {
+            if (targetType.flags & 32768) {
+                var resolved = resolveStructuredTypeMembers(targetType);
+                if (resolved.stringIndexInfo || resolved.numberIndexInfo && isNumericLiteralName(name) ||
+                    getPropertyOfType(targetType, name) || isComparingJsxAttributes && !isUnhyphenatedJsxName(name)) {
+                    return true;
+                }
+            }
+            else if (targetType.flags & 196608) {
+                for (var _i = 0, _a = targetType.types; _i < _a.length; _i++) {
+                    var t = _a[_i];
+                    if (isKnownProperty(t, name, isComparingJsxAttributes)) {
+                        return true;
+                    }
+                }
+            }
+            return false;
+        }
         function checkJsxAttributesAssignableToTagNameAttributes(openingLikeElement) {
             var targetAttributesType = isJsxIntrinsicIdentifier(openingLikeElement.tagName) ?
                 getIntrinsicAttributesTypeFromJsxOpeningLikeElement(openingLikeElement) :
@@ -32849,7 +32901,16 @@ var ts;
                 error(openingLikeElement, ts.Diagnostics.JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property, getJsxElementPropertiesName());
             }
             else {
-                checkTypeAssignableTo(sourceAttributesType, targetAttributesType, openingLikeElement.attributes.properties.length > 0 ? openingLikeElement.attributes : openingLikeElement);
+                var isSourceAttributeTypeAssignableToTarget = checkTypeAssignableTo(sourceAttributesType, targetAttributesType, openingLikeElement.attributes.properties.length > 0 ? openingLikeElement.attributes : openingLikeElement);
+                if (isSourceAttributeTypeAssignableToTarget && !isTypeAny(sourceAttributesType) && !isTypeAny(targetAttributesType)) {
+                    for (var _i = 0, _a = openingLikeElement.attributes.properties; _i < _a.length; _i++) {
+                        var attribute = _a[_i];
+                        if (ts.isJsxAttribute(attribute) && !isKnownProperty(targetAttributesType, attribute.name.text, true)) {
+                            error(attribute, ts.Diagnostics.Property_0_does_not_exist_on_type_1, attribute.name.text, typeToString(targetAttributesType));
+                            break;
+                        }
+                    }
+                }
             }
         }
         function checkJsxExpression(node, checkMode) {
@@ -33825,7 +33886,7 @@ var ts;
             }
             var valueDecl = expressionType.symbol && getClassLikeDeclarationOfSymbol(expressionType.symbol);
             if (valueDecl && ts.getModifierFlags(valueDecl) & 128) {
-                error(node, ts.Diagnostics.Cannot_create_an_instance_of_the_abstract_class_0, ts.declarationNameToString(valueDecl.name));
+                error(node, ts.Diagnostics.Cannot_create_an_instance_of_the_abstract_class_0, ts.declarationNameToString(ts.getNameOfDeclaration(valueDecl)));
                 return resolveErrorCall(node);
             }
             if (isTypeAny(expressionType)) {
@@ -34161,10 +34222,10 @@ var ts;
             var links = getSymbolLinks(parameter);
             if (!links.type) {
                 links.type = instantiateType(contextualType, mapper);
+                var name = ts.getNameOfDeclaration(parameter.valueDeclaration);
                 if (links.type === emptyObjectType &&
-                    (parameter.valueDeclaration.name.kind === 174 ||
-                        parameter.valueDeclaration.name.kind === 175)) {
-                    links.type = getTypeFromBindingPattern(parameter.valueDeclaration.name);
+                    (name.kind === 174 || name.kind === 175)) {
+                    links.type = getTypeFromBindingPattern(name);
                 }
                 assignBindingElementTypes(parameter.valueDeclaration);
             }
@@ -35597,7 +35658,7 @@ var ts;
                             continue;
                     }
                     if (names.get(memberName)) {
-                        error(member.symbol.valueDeclaration.name, ts.Diagnostics.Duplicate_identifier_0, memberName);
+                        error(ts.getNameOfDeclaration(member.symbol.valueDeclaration), ts.Diagnostics.Duplicate_identifier_0, memberName);
                         error(member.name, ts.Diagnostics.Duplicate_identifier_0, memberName);
                     }
                     else {
@@ -35671,7 +35732,8 @@ var ts;
                 return;
             }
             function containsSuperCallAsComputedPropertyName(n) {
-                return n.name && containsSuperCall(n.name);
+                var name = ts.getNameOfDeclaration(n);
+                return name && containsSuperCall(name);
             }
             function containsSuperCall(n) {
                 if (ts.isSuperCall(n)) {
@@ -35898,16 +35960,16 @@ var ts;
                     ts.forEach(overloads, function (o) {
                         var deviation = getEffectiveDeclarationFlags(o, flagsToCheck) ^ canonicalFlags_1;
                         if (deviation & 1) {
-                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_exported_or_non_exported);
+                            error(ts.getNameOfDeclaration(o), ts.Diagnostics.Overload_signatures_must_all_be_exported_or_non_exported);
                         }
                         else if (deviation & 2) {
-                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_ambient_or_non_ambient);
+                            error(ts.getNameOfDeclaration(o), ts.Diagnostics.Overload_signatures_must_all_be_ambient_or_non_ambient);
                         }
                         else if (deviation & (8 | 16)) {
-                            error(o.name || o, ts.Diagnostics.Overload_signatures_must_all_be_public_private_or_protected);
+                            error(ts.getNameOfDeclaration(o) || o, ts.Diagnostics.Overload_signatures_must_all_be_public_private_or_protected);
                         }
                         else if (deviation & 128) {
-                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_abstract_or_non_abstract);
+                            error(ts.getNameOfDeclaration(o), ts.Diagnostics.Overload_signatures_must_all_be_abstract_or_non_abstract);
                         }
                     });
                 }
@@ -35918,7 +35980,7 @@ var ts;
                     ts.forEach(overloads, function (o) {
                         var deviation = ts.hasQuestionToken(o) !== canonicalHasQuestionToken_1;
                         if (deviation) {
-                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_optional_or_required);
+                            error(ts.getNameOfDeclaration(o), ts.Diagnostics.Overload_signatures_must_all_be_optional_or_required);
                         }
                     });
                 }
@@ -36026,7 +36088,7 @@ var ts;
             }
             if (duplicateFunctionDeclaration) {
                 ts.forEach(declarations, function (declaration) {
-                    error(declaration.name, ts.Diagnostics.Duplicate_function_implementation);
+                    error(ts.getNameOfDeclaration(declaration), ts.Diagnostics.Duplicate_function_implementation);
                 });
             }
             if (lastSeenNonAmbientDeclaration && !lastSeenNonAmbientDeclaration.body &&
@@ -36089,11 +36151,12 @@ var ts;
                 for (var _b = 0, _c = symbol.declarations; _b < _c.length; _b++) {
                     var d = _c[_b];
                     var declarationSpaces = getDeclarationSpaces(d);
+                    var name = ts.getNameOfDeclaration(d);
                     if (declarationSpaces & commonDeclarationSpacesForDefaultAndNonDefault) {
-                        error(d.name, ts.Diagnostics.Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_default_0_declaration_instead, ts.declarationNameToString(d.name));
+                        error(name, ts.Diagnostics.Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_default_0_declaration_instead, ts.declarationNameToString(name));
                     }
                     else if (declarationSpaces & commonDeclarationSpacesForExportsAndLocals) {
-                        error(d.name, ts.Diagnostics.Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local, ts.declarationNameToString(d.name));
+                        error(name, ts.Diagnostics.Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local, ts.declarationNameToString(name));
                     }
                 }
             }
@@ -36455,15 +36518,16 @@ var ts;
                     if (!local.isReferenced) {
                         if (local.valueDeclaration && ts.getRootDeclaration(local.valueDeclaration).kind === 146) {
                             var parameter = ts.getRootDeclaration(local.valueDeclaration);
+                            var name = ts.getNameOfDeclaration(local.valueDeclaration);
                             if (compilerOptions.noUnusedParameters &&
                                 !ts.isParameterPropertyDeclaration(parameter) &&
                                 !ts.parameterIsThisKeyword(parameter) &&
-                                !parameterNameStartsWithUnderscore(local.valueDeclaration.name)) {
-                                error(local.valueDeclaration.name, ts.Diagnostics._0_is_declared_but_never_used, local.name);
+                                !parameterNameStartsWithUnderscore(name)) {
+                                error(name, ts.Diagnostics._0_is_declared_but_never_used, local.name);
                             }
                         }
                         else if (compilerOptions.noUnusedLocals) {
-                            ts.forEach(local.declarations, function (d) { return errorUnusedLocal(d.name || d, local.name); });
+                            ts.forEach(local.declarations, function (d) { return errorUnusedLocal(ts.getNameOfDeclaration(d) || d, local.name); });
                         }
                     }
                 });
@@ -36541,7 +36605,7 @@ var ts;
                         for (var _i = 0, _a = local.declarations; _i < _a.length; _i++) {
                             var declaration = _a[_i];
                             if (!ts.isAmbientModule(declaration)) {
-                                errorUnusedLocal(declaration.name, local.name);
+                                errorUnusedLocal(ts.getNameOfDeclaration(declaration), local.name);
                             }
                         }
                     }
@@ -36603,7 +36667,7 @@ var ts;
                 if (getNodeCheckFlags(current) & 4) {
                     var isDeclaration_1 = node.kind !== 71;
                     if (isDeclaration_1) {
-                        error(node.name, ts.Diagnostics.Duplicate_identifier_this_Compiler_uses_variable_declaration_this_to_capture_this_reference);
+                        error(ts.getNameOfDeclaration(node), ts.Diagnostics.Duplicate_identifier_this_Compiler_uses_variable_declaration_this_to_capture_this_reference);
                     }
                     else {
                         error(node, ts.Diagnostics.Expression_resolves_to_variable_declaration_this_that_compiler_uses_to_capture_this_reference);
@@ -36617,7 +36681,7 @@ var ts;
                 if (getNodeCheckFlags(current) & 8) {
                     var isDeclaration_2 = node.kind !== 71;
                     if (isDeclaration_2) {
-                        error(node.name, ts.Diagnostics.Duplicate_identifier_newTarget_Compiler_uses_variable_declaration_newTarget_to_capture_new_target_meta_property_reference);
+                        error(ts.getNameOfDeclaration(node), ts.Diagnostics.Duplicate_identifier_newTarget_Compiler_uses_variable_declaration_newTarget_to_capture_new_target_meta_property_reference);
                     }
                     else {
                         error(node, ts.Diagnostics.Expression_resolves_to_variable_declaration_newTarget_that_compiler_uses_to_capture_new_target_meta_property_reference);
@@ -36813,7 +36877,7 @@ var ts;
                     checkTypeAssignableTo(checkExpressionCached(node.initializer), declarationType, node, undefined);
                 }
                 if (!areDeclarationFlagsIdentical(node, symbol.valueDeclaration)) {
-                    error(symbol.valueDeclaration.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_modifiers, ts.declarationNameToString(node.name));
+                    error(ts.getNameOfDeclaration(symbol.valueDeclaration), ts.Diagnostics.All_declarations_of_0_must_have_identical_modifiers, ts.declarationNameToString(node.name));
                     error(node.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_modifiers, ts.declarationNameToString(node.name));
                 }
             }
@@ -37374,13 +37438,13 @@ var ts;
                     return;
                 }
                 var propDeclaration = prop.valueDeclaration;
-                if (indexKind === 1 && !(propDeclaration ? isNumericName(propDeclaration.name) : isNumericLiteralName(prop.name))) {
+                if (indexKind === 1 && !(propDeclaration ? isNumericName(ts.getNameOfDeclaration(propDeclaration)) : isNumericLiteralName(prop.name))) {
                     return;
                 }
                 var errorNode;
                 if (propDeclaration &&
-                    (ts.getSpecialPropertyAssignmentKind(propDeclaration) === 4 ||
-                        propDeclaration.name.kind === 144 ||
+                    (propDeclaration.kind === 194 ||
+                        ts.getNameOfDeclaration(propDeclaration).kind === 144 ||
                         prop.parent === containingType.symbol)) {
                     errorNode = propDeclaration;
                 }
@@ -37655,7 +37719,7 @@ var ts;
                         else {
                             errorMessage = ts.Diagnostics.Class_0_defines_instance_member_accessor_1_but_extended_class_2_defines_it_as_instance_member_function;
                         }
-                        error(derived.valueDeclaration.name || derived.valueDeclaration, errorMessage, typeToString(baseType), symbolToString(base), typeToString(type));
+                        error(ts.getNameOfDeclaration(derived.valueDeclaration) || derived.valueDeclaration, errorMessage, typeToString(baseType), symbolToString(base), typeToString(type));
                     }
                 }
             }
@@ -37923,7 +37987,7 @@ var ts;
                 if (enumSymbol.declarations.length > 1) {
                     ts.forEach(enumSymbol.declarations, function (decl) {
                         if (ts.isConstEnumDeclaration(decl) !== enumIsConst) {
-                            error(decl.name, ts.Diagnostics.Enum_declarations_must_all_be_const_or_non_const);
+                            error(ts.getNameOfDeclaration(decl), ts.Diagnostics.Enum_declarations_must_all_be_const_or_non_const);
                         }
                     });
                 }
@@ -46420,7 +46484,7 @@ var ts;
             if (enabledSubstitutions & 2 && !ts.isInternalName(node)) {
                 var declaration = resolver.getReferencedDeclarationWithCollidingName(node);
                 if (declaration && !(ts.isClassLike(declaration) && isPartOfClassBody(declaration, node))) {
-                    return ts.setTextRange(ts.getGeneratedNameForNode(declaration.name), node);
+                    return ts.setTextRange(ts.getGeneratedNameForNode(ts.getNameOfDeclaration(declaration)), node);
                 }
             }
             return node;
@@ -50095,7 +50159,7 @@ var ts;
         var errorNameNode;
         var emitJsDocComments = compilerOptions.removeComments ? ts.noop : writeJsDocComments;
         var emit = compilerOptions.stripInternal ? stripInternal : emitNode;
-        var noDeclare;
+        var needsDeclare = true;
         var moduleElementDeclarationEmitInfo = [];
         var asynchronousSubModuleDeclarationEmitInfo;
         var referencesOutput = "";
@@ -50120,11 +50184,11 @@ var ts;
             }
             resultHasExternalModuleIndicator = false;
             if (!isBundledEmit || !ts.isExternalModule(sourceFile)) {
-                noDeclare = false;
+                needsDeclare = true;
                 emitSourceFile(sourceFile);
             }
             else if (ts.isExternalModule(sourceFile)) {
-                noDeclare = true;
+                needsDeclare = false;
                 write("declare module \"" + ts.getResolvedExternalModuleName(host, sourceFile) + "\" {");
                 writeLine();
                 increaseIndent();
@@ -50541,9 +50605,9 @@ var ts;
                 }
             }
         }
-        function emitTempVariableDeclaration(expr, baseName, diagnostic) {
+        function emitTempVariableDeclaration(expr, baseName, diagnostic, needsDeclare) {
             var tempVarName = getExportTempVariableName(baseName);
-            if (!noDeclare) {
+            if (needsDeclare) {
                 write("declare ");
             }
             write("const ");
@@ -50564,7 +50628,7 @@ var ts;
                 var tempVarName = emitTempVariableDeclaration(node.expression, "_default", {
                     diagnosticMessage: ts.Diagnostics.Default_export_of_the_module_has_or_is_using_private_name_0,
                     errorNode: node
-                });
+                }, needsDeclare);
                 write(node.isExportEquals ? "export = " : "export default ");
                 write(tempVarName);
             }
@@ -50643,7 +50707,7 @@ var ts;
                 if (modifiers & 512) {
                     write("default ");
                 }
-                else if (node.kind !== 230 && !noDeclare) {
+                else if (node.kind !== 230 && needsDeclare) {
                     write("declare ");
                 }
             }
@@ -50993,7 +51057,7 @@ var ts;
                     return {
                         diagnosticMessage: diagnosticMessage,
                         errorNode: node,
-                        typeName: node.parent.parent.name
+                        typeName: ts.getNameOfDeclaration(node.parent.parent)
                     };
                 }
             }
@@ -51019,7 +51083,7 @@ var ts;
                         diagnosticMessage: ts.Diagnostics.extends_clause_of_exported_class_0_has_or_is_using_private_name_1,
                         errorNode: baseTypeNode,
                         typeName: node.name
-                    });
+                    }, !ts.findAncestor(node, function (n) { return n.kind === 233; }));
             }
             emitJsDocComments(node);
             emitModuleElementDeclarationFlags(node);
@@ -57712,7 +57776,7 @@ var ts;
                 case 153:
                 case 154:
                 case 233:
-                    return node.parent.name === node;
+                    return ts.getNameOfDeclaration(node.parent) === node;
                 case 180:
                     return node.parent.argumentExpression === node;
                 case 144:
@@ -61156,7 +61220,7 @@ var ts;
                         }
                     }
                     else {
-                        existingName = m.name.text;
+                        existingName = ts.getNameOfDeclaration(m).text;
                     }
                     existingMemberNames.set(existingName, true);
                 }
@@ -62224,8 +62288,8 @@ var ts;
             if (symbol.name !== "default") {
                 return symbol.name;
             }
-            var name = ts.forEach(symbol.declarations, function (_a) {
-                var name = _a.name;
+            var name = ts.forEach(symbol.declarations, function (decl) {
+                var name = ts.getNameOfDeclaration(decl);
                 return name && name.kind === 71 && name.text;
             });
             ts.Debug.assert(!!name);
@@ -62877,7 +62941,7 @@ var ts;
                 var flags = _a.flags, valueDeclaration = _a.valueDeclaration;
                 var shorthandValueSymbol = state.checker.getShorthandAssignmentValueSymbol(valueDeclaration);
                 if (!(flags & 134217728) && search.includes(shorthandValueSymbol)) {
-                    addReference(valueDeclaration.name, shorthandValueSymbol, search.location, state);
+                    addReference(ts.getNameOfDeclaration(valueDeclaration), shorthandValueSymbol, search.location, state);
                 }
             }
             function addReference(referenceLocation, relatedSymbol, searchLocation, state) {
@@ -63626,7 +63690,7 @@ var ts;
             }
         }
         function createDefinitionInfo(node, symbolKind, symbolName, containerName) {
-            return createDefinitionInfoFromName(node.name || node, symbolKind, symbolName, containerName);
+            return createDefinitionInfoFromName(ts.getNameOfDeclaration(node) || node, symbolKind, symbolName, containerName);
         }
         function createDefinitionInfoFromName(name, symbolKind, symbolName, containerName) {
             var sourceFile = name.getSourceFile();
@@ -64149,16 +64213,19 @@ var ts;
                 return undefined;
             }
             function tryAddSingleDeclarationName(declaration, containers) {
-                if (declaration && declaration.name) {
-                    var text = getTextOfIdentifierOrLiteral(declaration.name);
-                    if (text !== undefined) {
-                        containers.unshift(text);
-                    }
-                    else if (declaration.name.kind === 144) {
-                        return tryAddComputedPropertyName(declaration.name.expression, containers, true);
-                    }
-                    else {
-                        return false;
+                if (declaration) {
+                    var name = ts.getNameOfDeclaration(declaration);
+                    if (name) {
+                        var text = getTextOfIdentifierOrLiteral(name);
+                        if (text !== undefined) {
+                            containers.unshift(text);
+                        }
+                        else if (name.kind === 144) {
+                            return tryAddComputedPropertyName(name.expression, containers, true);
+                        }
+                        else {
+                            return false;
+                        }
                     }
                 }
                 return true;
@@ -64182,8 +64249,9 @@ var ts;
             }
             function getContainers(declaration) {
                 var containers = [];
-                if (declaration.name.kind === 144) {
-                    if (!tryAddComputedPropertyName(declaration.name.expression, containers, false)) {
+                var name = ts.getNameOfDeclaration(declaration);
+                if (name.kind === 144) {
+                    if (!tryAddComputedPropertyName(name.expression, containers, false)) {
                         return undefined;
                     }
                 }
@@ -64216,6 +64284,7 @@ var ts;
             function createNavigateToItem(rawItem) {
                 var declaration = rawItem.declaration;
                 var container = ts.getContainerNode(declaration);
+                var containerName = container && ts.getNameOfDeclaration(container);
                 return {
                     name: rawItem.name,
                     kind: ts.getNodeKind(declaration),
@@ -64224,8 +64293,8 @@ var ts;
                     isCaseSensitive: rawItem.isCaseSensitive,
                     fileName: rawItem.fileName,
                     textSpan: ts.createTextSpanFromNode(declaration),
-                    containerName: container && container.name ? container.name.text : "",
-                    containerKind: container && container.name ? ts.getNodeKind(container) : ""
+                    containerName: containerName ? containerName.text : "",
+                    containerKind: containerName ? ts.getNodeKind(container) : ""
                 };
             }
         }
@@ -64439,8 +64508,8 @@ var ts;
         function mergeChildren(children) {
             var nameToItems = ts.createMap();
             ts.filterMutate(children, function (child) {
-                var decl = child.node;
-                var name = decl.name && nodeText(decl.name);
+                var declName = ts.getNameOfDeclaration(child.node);
+                var name = declName && nodeText(declName);
                 if (!name) {
                     return true;
                 }
@@ -64518,9 +64587,9 @@ var ts;
             if (node.kind === 233) {
                 return getModuleName(node);
             }
-            var decl = node;
-            if (decl.name) {
-                return ts.getPropertyNameForPropertyNameNode(decl.name);
+            var declName = ts.getNameOfDeclaration(node);
+            if (declName) {
+                return ts.getPropertyNameForPropertyNameNode(declName);
             }
             switch (node.kind) {
                 case 186:
@@ -64537,7 +64606,7 @@ var ts;
             if (node.kind === 233) {
                 return getModuleName(node);
             }
-            var name = node.name;
+            var name = ts.getNameOfDeclaration(node);
             if (name) {
                 var text = nodeText(name);
                 if (text.length > 0) {
@@ -68165,7 +68234,7 @@ var ts;
                         }
                     case 149:
                     case 146:
-                        return node.name.kind;
+                        return ts.getNameOfDeclaration(node).kind;
                 }
             }
             function getDynamicIndentation(node, nodeStartLine, indentation, delta) {
@@ -70643,7 +70712,7 @@ var ts;
                 return undefined;
             }
             var declaration = declarations[0];
-            var name = ts.getSynthesizedClone(declaration.name);
+            var name = ts.getSynthesizedClone(ts.getNameOfDeclaration(declaration));
             var visibilityModifier = createVisibilityModifier(ts.getModifierFlags(declaration));
             var modifiers = visibilityModifier ? ts.createNodeArray([visibilityModifier]) : undefined;
             var type = checker.getWidenedType(checker.getTypeOfSymbolAtLocation(symbol, enclosingDeclaration));
@@ -71131,13 +71200,14 @@ var ts;
                 return declarations;
             }
             function getDeclarationName(declaration) {
-                if (declaration.name) {
-                    var result_7 = getTextOfIdentifierOrLiteral(declaration.name);
+                var name = ts.getNameOfDeclaration(declaration);
+                if (name) {
+                    var result_7 = getTextOfIdentifierOrLiteral(name);
                     if (result_7 !== undefined) {
                         return result_7;
                     }
-                    if (declaration.name.kind === 144) {
-                        var expr = declaration.name.expression;
+                    if (name.kind === 144) {
+                        var expr = name.expression;
                         if (expr.kind === 179) {
                             return expr.name.text;
                         }
@@ -72749,6 +72819,9 @@ var ts;
                 var compilerOptions = JSON.parse(compilerOptionsJson);
                 var result = ts.resolveModuleName(moduleName, ts.normalizeSlashes(fileName), compilerOptions, _this.host);
                 var resolvedFileName = result.resolvedModule ? result.resolvedModule.resolvedFileName : undefined;
+                if (result.resolvedModule && result.resolvedModule.extension !== ts.Extension.Ts && result.resolvedModule.extension !== ts.Extension.Tsx && result.resolvedModule.extension !== ts.Extension.Dts) {
+                    resolvedFileName = undefined;
+                }
                 return {
                     resolvedFileName: resolvedFileName,
                     failedLookupLocations: result.failedLookupLocations

lib/tsserverlibrary.d.ts

@@ -482,9 +482,11 @@ declare namespace ts {
     type DeclarationName = Identifier | StringLiteral | NumericLiteral | ComputedPropertyName | BindingPattern;
     interface Declaration extends Node {
         _declarationBrand: any;
+    }
+    interface NamedDeclaration extends Declaration {
         name?: DeclarationName;
     }
-    interface DeclarationStatement extends Declaration, Statement {
+    interface DeclarationStatement extends NamedDeclaration, Statement {
         name?: Identifier | StringLiteral | NumericLiteral;
     }
     interface ComputedPropertyName extends Node {
@@ -495,7 +497,7 @@ declare namespace ts {
         kind: SyntaxKind.Decorator;
         expression: LeftHandSideExpression;
     }
-    interface TypeParameterDeclaration extends Declaration {
+    interface TypeParameterDeclaration extends NamedDeclaration {
         kind: SyntaxKind.TypeParameter;
         parent?: DeclarationWithTypeParameters;
         name: Identifier;
@@ -503,7 +505,7 @@ declare namespace ts {
         default?: TypeNode;
         expression?: Expression;
     }
-    interface SignatureDeclaration extends Declaration {
+    interface SignatureDeclaration extends NamedDeclaration {
         name?: PropertyName;
         typeParameters?: NodeArray<TypeParameterDeclaration>;
         parameters: NodeArray<ParameterDeclaration>;
@@ -516,7 +518,7 @@ declare namespace ts {
         kind: SyntaxKind.ConstructSignature;
     }
     type BindingName = Identifier | BindingPattern;
-    interface VariableDeclaration extends Declaration {
+    interface VariableDeclaration extends NamedDeclaration {
         kind: SyntaxKind.VariableDeclaration;
         parent?: VariableDeclarationList | CatchClause;
         name: BindingName;
@@ -528,7 +530,7 @@ declare namespace ts {
         parent?: VariableStatement | ForStatement | ForOfStatement | ForInStatement;
         declarations: NodeArray<VariableDeclaration>;
     }
-    interface ParameterDeclaration extends Declaration {
+    interface ParameterDeclaration extends NamedDeclaration {
         kind: SyntaxKind.Parameter;
         parent?: SignatureDeclaration;
         dotDotDotToken?: DotDotDotToken;
@@ -537,7 +539,7 @@ declare namespace ts {
         type?: TypeNode;
         initializer?: Expression;
     }
-    interface BindingElement extends Declaration {
+    interface BindingElement extends NamedDeclaration {
         kind: SyntaxKind.BindingElement;
         parent?: BindingPattern;
         propertyName?: PropertyName;
@@ -559,7 +561,7 @@ declare namespace ts {
         type?: TypeNode;
         initializer?: Expression;
     }
-    interface ObjectLiteralElement extends Declaration {
+    interface ObjectLiteralElement extends NamedDeclaration {
         _objectLiteralBrandBrand: any;
         name?: PropertyName;
     }
@@ -581,7 +583,7 @@ declare namespace ts {
         kind: SyntaxKind.SpreadAssignment;
         expression: Expression;
     }
-    interface VariableLikeDeclaration extends Declaration {
+    interface VariableLikeDeclaration extends NamedDeclaration {
         propertyName?: PropertyName;
         dotDotDotToken?: DotDotDotToken;
         name: DeclarationName;
@@ -589,7 +591,7 @@ declare namespace ts {
         type?: TypeNode;
         initializer?: Expression;
     }
-    interface PropertyLikeDeclaration extends Declaration {
+    interface PropertyLikeDeclaration extends NamedDeclaration {
         name: PropertyName;
     }
     interface ObjectBindingPattern extends Node {
@@ -926,7 +928,7 @@ declare namespace ts {
     }
     type EntityNameExpression = Identifier | PropertyAccessEntityNameExpression | ParenthesizedExpression;
     type EntityNameOrEntityNameExpression = EntityName | EntityNameExpression;
-    interface PropertyAccessExpression extends MemberExpression, Declaration {
+    interface PropertyAccessExpression extends MemberExpression, NamedDeclaration {
         kind: SyntaxKind.PropertyAccessExpression;
         expression: LeftHandSideExpression;
         name: Identifier;
@@ -1172,7 +1174,7 @@ declare namespace ts {
         block: Block;
     }
     type DeclarationWithTypeParameters = SignatureDeclaration | ClassLikeDeclaration | InterfaceDeclaration | TypeAliasDeclaration;
-    interface ClassLikeDeclaration extends Declaration {
+    interface ClassLikeDeclaration extends NamedDeclaration {
         name?: Identifier;
         typeParameters?: NodeArray<TypeParameterDeclaration>;
         heritageClauses?: NodeArray<HeritageClause>;
@@ -1185,11 +1187,11 @@ declare namespace ts {
     interface ClassExpression extends ClassLikeDeclaration, PrimaryExpression {
         kind: SyntaxKind.ClassExpression;
     }
-    interface ClassElement extends Declaration {
+    interface ClassElement extends NamedDeclaration {
         _classElementBrand: any;
         name?: PropertyName;
     }
-    interface TypeElement extends Declaration {
+    interface TypeElement extends NamedDeclaration {
         _typeElementBrand: any;
         name?: PropertyName;
         questionToken?: QuestionToken;
@@ -1213,7 +1215,7 @@ declare namespace ts {
         typeParameters?: NodeArray<TypeParameterDeclaration>;
         type: TypeNode;
     }
-    interface EnumMember extends Declaration {
+    interface EnumMember extends NamedDeclaration {
         kind: SyntaxKind.EnumMember;
         parent?: EnumDeclaration;
         name: PropertyName;
@@ -1266,13 +1268,13 @@ declare namespace ts {
         moduleSpecifier: Expression;
     }
     type NamedImportBindings = NamespaceImport | NamedImports;
-    interface ImportClause extends Declaration {
+    interface ImportClause extends NamedDeclaration {
         kind: SyntaxKind.ImportClause;
         parent?: ImportDeclaration;
         name?: Identifier;
         namedBindings?: NamedImportBindings;
     }
-    interface NamespaceImport extends Declaration {
+    interface NamespaceImport extends NamedDeclaration {
         kind: SyntaxKind.NamespaceImport;
         parent?: ImportClause;
         name: Identifier;
@@ -1298,13 +1300,13 @@ declare namespace ts {
         elements: NodeArray<ExportSpecifier>;
     }
     type NamedImportsOrExports = NamedImports | NamedExports;
-    interface ImportSpecifier extends Declaration {
+    interface ImportSpecifier extends NamedDeclaration {
         kind: SyntaxKind.ImportSpecifier;
         parent?: NamedImports;
         propertyName?: Identifier;
         name: Identifier;
     }
-    interface ExportSpecifier extends Declaration {
+    interface ExportSpecifier extends NamedDeclaration {
         kind: SyntaxKind.ExportSpecifier;
         parent?: NamedExports;
         propertyName?: Identifier;
@@ -1435,7 +1437,7 @@ declare namespace ts {
         kind: SyntaxKind.JSDocTypeTag;
         typeExpression: JSDocTypeExpression;
     }
-    interface JSDocTypedefTag extends JSDocTag, Declaration {
+    interface JSDocTypedefTag extends JSDocTag, NamedDeclaration {
         kind: SyntaxKind.JSDocTypedefTag;
         fullName?: JSDocNamespaceDeclaration | Identifier;
         name?: Identifier;

lib/tsserverlibrary.js

@@ -9521,6 +9521,36 @@ var ts;
         return false;
     }
     ts.isDeclarationName = isDeclarationName;
+    function getNameOfDeclaration(declaration) {
+        if (!declaration) {
+            return undefined;
+        }
+        if (declaration.kind === 194) {
+            var kind = getSpecialPropertyAssignmentKind(declaration);
+            var lhs = declaration.left;
+            switch (kind) {
+                case 0:
+                case 2:
+                    return undefined;
+                case 1:
+                    if (lhs.kind === 71) {
+                        return lhs.name;
+                    }
+                    else {
+                        return lhs.expression.name;
+                    }
+                case 4:
+                case 5:
+                    return lhs.name;
+                case 3:
+                    return lhs.expression.name;
+            }
+        }
+        else {
+            return declaration.name;
+        }
+    }
+    ts.getNameOfDeclaration = getNameOfDeclaration;
     function isLiteralComputedPropertyDeclarationName(node) {
         return (node.kind === 9 || node.kind === 8) &&
             node.parent.kind === 144 &&
@@ -9713,7 +9743,8 @@ var ts;
     }
     ts.isStringOrNumericLiteral = isStringOrNumericLiteral;
     function hasDynamicName(declaration) {
-        return declaration.name && isDynamicName(declaration.name);
+        var name = getNameOfDeclaration(declaration);
+        return name && isDynamicName(name);
     }
     ts.hasDynamicName = hasDynamicName;
     function isDynamicName(name) {
@@ -14367,9 +14398,10 @@ var ts;
     }
     ts.getDeclarationName = getDeclarationName;
     function getName(node, allowComments, allowSourceMaps, emitFlags) {
-        if (node.name && ts.isIdentifier(node.name) && !ts.isGeneratedIdentifier(node.name)) {
-            var name = ts.getMutableClone(node.name);
-            emitFlags |= ts.getEmitFlags(node.name);
+        var nodeName = ts.getNameOfDeclaration(node);
+        if (nodeName && ts.isIdentifier(nodeName) && !ts.isGeneratedIdentifier(nodeName)) {
+            var name = ts.getMutableClone(nodeName);
+            emitFlags |= ts.getEmitFlags(nodeName);
             if (!allowSourceMaps)
                 emitFlags |= 48;
             if (!allowComments)
@@ -20630,19 +20662,20 @@ var ts;
             }
         }
         function getDeclarationName(node) {
-            if (node.name) {
+            var name = ts.getNameOfDeclaration(node);
+            if (name) {
                 if (ts.isAmbientModule(node)) {
-                    return ts.isGlobalScopeAugmentation(node) ? "__global" : "\"" + node.name.text + "\"";
+                    return ts.isGlobalScopeAugmentation(node) ? "__global" : "\"" + name.text + "\"";
                 }
-                if (node.name.kind === 144) {
-                    var nameExpression = node.name.expression;
+                if (name.kind === 144) {
+                    var nameExpression = name.expression;
                     if (ts.isStringOrNumericLiteral(nameExpression)) {
                         return nameExpression.text;
                     }
                     ts.Debug.assert(ts.isWellKnownSymbolSyntactically(nameExpression));
                     return ts.getPropertyNameForKnownSymbolName(nameExpression.name.text);
                 }
-                return node.name.text;
+                return name.text;
             }
             switch (node.kind) {
                 case 152:
@@ -20738,9 +20771,9 @@ var ts;
                             }
                         }
                         ts.forEach(symbol.declarations, function (declaration) {
-                            file.bindDiagnostics.push(ts.createDiagnosticForNode(declaration.name || declaration, message_1, getDisplayName(declaration)));
+                            file.bindDiagnostics.push(ts.createDiagnosticForNode(ts.getNameOfDeclaration(declaration) || declaration, message_1, getDisplayName(declaration)));
                         });
-                        file.bindDiagnostics.push(ts.createDiagnosticForNode(node.name || node, message_1, getDisplayName(node)));
+                        file.bindDiagnostics.push(ts.createDiagnosticForNode(ts.getNameOfDeclaration(node) || node, message_1, getDisplayName(node)));
                         symbol = createSymbol(0, name);
                     }
                 }
@@ -23652,16 +23685,16 @@ var ts;
                 recordMergedSymbol(target, source);
             }
             else if (target.flags & 1024) {
-                error(source.declarations[0].name, ts.Diagnostics.Cannot_augment_module_0_with_value_exports_because_it_resolves_to_a_non_module_entity, symbolToString(target));
+                error(ts.getNameOfDeclaration(source.declarations[0]), ts.Diagnostics.Cannot_augment_module_0_with_value_exports_because_it_resolves_to_a_non_module_entity, symbolToString(target));
             }
             else {
                 var message_2 = target.flags & 2 || source.flags & 2
                     ? ts.Diagnostics.Cannot_redeclare_block_scoped_variable_0 : ts.Diagnostics.Duplicate_identifier_0;
                 ts.forEach(source.declarations, function (node) {
-                    error(node.name ? node.name : node, message_2, symbolToString(source));
+                    error(ts.getNameOfDeclaration(node) || node, message_2, symbolToString(source));
                 });
                 ts.forEach(target.declarations, function (node) {
-                    error(node.name ? node.name : node, message_2, symbolToString(source));
+                    error(ts.getNameOfDeclaration(node) || node, message_2, symbolToString(source));
                 });
             }
         }
@@ -23772,7 +23805,8 @@ var ts;
             var useFile = ts.getSourceFileOfNode(usage);
             if (declarationFile !== useFile) {
                 if ((modulekind && (declarationFile.externalModuleIndicator || useFile.externalModuleIndicator)) ||
-                    (!compilerOptions.outFile && !compilerOptions.out)) {
+                    (!compilerOptions.outFile && !compilerOptions.out) ||
+                    ts.isInAmbientContext(declaration)) {
                     return true;
                 }
                 if (isUsedInFunctionOrInstanceProperty(usage, declaration)) {
@@ -24133,13 +24167,13 @@ var ts;
             ts.Debug.assert(declaration !== undefined, "Declaration to checkResolvedBlockScopedVariable is undefined");
             if (!ts.isInAmbientContext(declaration) && !isBlockScopedNameDeclaredBeforeUse(declaration, errorLocation)) {
                 if (result.flags & 2) {
-                    error(errorLocation, ts.Diagnostics.Block_scoped_variable_0_used_before_its_declaration, ts.declarationNameToString(declaration.name));
+                    error(errorLocation, ts.Diagnostics.Block_scoped_variable_0_used_before_its_declaration, ts.declarationNameToString(ts.getNameOfDeclaration(declaration)));
                 }
                 else if (result.flags & 32) {
-                    error(errorLocation, ts.Diagnostics.Class_0_used_before_its_declaration, ts.declarationNameToString(declaration.name));
+                    error(errorLocation, ts.Diagnostics.Class_0_used_before_its_declaration, ts.declarationNameToString(ts.getNameOfDeclaration(declaration)));
                 }
                 else if (result.flags & 384) {
-                    error(errorLocation, ts.Diagnostics.Enum_0_used_before_its_declaration, ts.declarationNameToString(declaration.name));
+                    error(errorLocation, ts.Diagnostics.Enum_0_used_before_its_declaration, ts.declarationNameToString(ts.getNameOfDeclaration(declaration)));
                 }
             }
         }
@@ -25349,8 +25383,9 @@ var ts;
                 function getNameOfSymbol(symbol) {
                     var declaration = ts.firstOrUndefined(symbol.declarations);
                     if (declaration) {
-                        if (declaration.name) {
-                            return ts.declarationNameToString(declaration.name);
+                        var name = ts.getNameOfDeclaration(declaration);
+                        if (name) {
+                            return ts.declarationNameToString(name);
                         }
                         if (declaration.parent && declaration.parent.kind === 226) {
                             return ts.declarationNameToString(declaration.parent.name);
@@ -25431,8 +25466,9 @@ var ts;
         function getNameOfSymbol(symbol) {
             if (symbol.declarations && symbol.declarations.length) {
                 var declaration = symbol.declarations[0];
-                if (declaration.name) {
-                    return ts.declarationNameToString(declaration.name);
+                var name = ts.getNameOfDeclaration(declaration);
+                if (name) {
+                    return ts.declarationNameToString(name);
                 }
                 if (declaration.parent && declaration.parent.kind === 226) {
                     return ts.declarationNameToString(declaration.parent.name);
@@ -28261,8 +28297,9 @@ var ts;
                     type = anyType;
                     if (noImplicitAny) {
                         var declaration = signature.declaration;
-                        if (declaration.name) {
-                            error(declaration.name, ts.Diagnostics._0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions, ts.declarationNameToString(declaration.name));
+                        var name = ts.getNameOfDeclaration(declaration);
+                        if (name) {
+                            error(name, ts.Diagnostics._0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions, ts.declarationNameToString(name));
                         }
                         else {
                             error(declaration, ts.Diagnostics.Function_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions);
@@ -30182,24 +30219,6 @@ var ts;
                 }
                 return 0;
             }
-            function isKnownProperty(type, name, isComparingJsxAttributes) {
-                if (type.flags & 32768) {
-                    var resolved = resolveStructuredTypeMembers(type);
-                    if (resolved.stringIndexInfo || resolved.numberIndexInfo && isNumericLiteralName(name) ||
-                        getPropertyOfType(type, name) || isComparingJsxAttributes && !isUnhyphenatedJsxName(name)) {
-                        return true;
-                    }
-                }
-                else if (type.flags & 196608) {
-                    for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
-                        var t = _a[_i];
-                        if (isKnownProperty(t, name, isComparingJsxAttributes)) {
-                            return true;
-                        }
-                    }
-                }
-                return false;
-            }
             function hasExcessProperties(source, target, reportErrors) {
                 if (maybeTypeOfKind(target, 32768) && !(getObjectFlags(target) & 512)) {
                     var isComparingJsxAttributes = !!(source.flags & 33554432);
@@ -31213,7 +31232,7 @@ var ts;
                 default:
                     diagnostic = ts.Diagnostics.Variable_0_implicitly_has_an_1_type;
             }
-            error(declaration, diagnostic, ts.declarationNameToString(declaration.name), typeAsString);
+            error(declaration, diagnostic, ts.declarationNameToString(ts.getNameOfDeclaration(declaration)), typeAsString);
         }
         function reportErrorsFromWidening(declaration, type) {
             if (produceDiagnostics && noImplicitAny && type.flags & 2097152) {
@@ -32765,7 +32784,7 @@ var ts;
             if (type === autoType || type === autoArrayType) {
                 if (flowType === autoType || flowType === autoArrayType) {
                     if (noImplicitAny) {
-                        error(declaration.name, ts.Diagnostics.Variable_0_implicitly_has_type_1_in_some_locations_where_its_type_cannot_be_determined, symbolToString(symbol), typeToString(flowType));
+                        error(ts.getNameOfDeclaration(declaration), ts.Diagnostics.Variable_0_implicitly_has_type_1_in_some_locations_where_its_type_cannot_be_determined, symbolToString(symbol), typeToString(flowType));
                         error(node, ts.Diagnostics.Variable_0_implicitly_has_an_1_type, symbolToString(symbol), typeToString(flowType));
                     }
                     return convertAutoToAny(flowType);
@@ -33763,6 +33782,8 @@ var ts;
             var spread = emptyObjectType;
             var attributesArray = [];
             var hasSpreadAnyType = false;
+            var explicitlySpecifyChildrenAttribute = false;
+            var jsxChildrenPropertyName = getJsxElementChildrenPropertyname();
             for (var _i = 0, _a = attributes.properties; _i < _a.length; _i++) {
                 var attributeDecl = _a[_i];
                 var member = attributeDecl.symbol;
@@ -33780,6 +33801,9 @@ var ts;
                     attributeSymbol.target = member;
                     attributesTable.set(attributeSymbol.name, attributeSymbol);
                     attributesArray.push(attributeSymbol);
+                    if (attributeDecl.name.text === jsxChildrenPropertyName) {
+                        explicitlySpecifyChildrenAttribute = true;
+                    }
                 }
                 else {
                     ts.Debug.assert(attributeDecl.kind === 255);
@@ -33788,11 +33812,7 @@ var ts;
                         attributesArray = [];
                         attributesTable = ts.createMap();
                     }
-                    var exprType = checkExpression(attributeDecl.expression);
-                    if (!isValidSpreadType(exprType)) {
-                        error(attributeDecl, ts.Diagnostics.Spread_types_may_only_be_created_from_object_types);
-                        hasSpreadAnyType = true;
-                    }
+                    var exprType = getApparentType(checkExpression(attributeDecl.expression));
                     if (isTypeAny(exprType)) {
                         hasSpreadAnyType = true;
                     }
@@ -33831,9 +33851,8 @@ var ts;
                         childrenTypes.push(checkExpression(child, checkMode));
                     }
                 }
-                var jsxChildrenPropertyName = getJsxElementChildrenPropertyname();
                 if (!hasSpreadAnyType && jsxChildrenPropertyName && jsxChildrenPropertyName !== "") {
-                    if (attributesTable.has(jsxChildrenPropertyName)) {
+                    if (explicitlySpecifyChildrenAttribute) {
                         error(attributes, ts.Diagnostics._0_are_specified_twice_The_attribute_named_0_will_be_overwritten, jsxChildrenPropertyName);
                     }
                     var childrenPropSymbol = createSymbol(4 | 134217728, jsxChildrenPropertyName);
@@ -33846,8 +33865,7 @@ var ts;
             return hasSpreadAnyType ? anyType : createJsxAttributesType(attributes.symbol, attributesTable);
             function createJsxAttributesType(symbol, attributesTable) {
                 var result = createAnonymousType(symbol, attributesTable, emptyArray, emptyArray, undefined, undefined);
-                var freshObjectLiteralFlag = compilerOptions.suppressExcessPropertyErrors ? 0 : 1048576;
-                result.flags |= 33554432 | 4194304 | freshObjectLiteralFlag;
+                result.flags |= 33554432 | 4194304;
                 result.objectFlags |= 128;
                 return result;
             }
@@ -33947,6 +33965,20 @@ var ts;
             }
             return _jsxElementChildrenPropertyName;
         }
+        function getApparentTypeOfJsxPropsType(propsType) {
+            if (!propsType) {
+                return undefined;
+            }
+            if (propsType.flags & 131072) {
+                var propsApparentType = [];
+                for (var _i = 0, _a = propsType.types; _i < _a.length; _i++) {
+                    var t = _a[_i];
+                    propsApparentType.push(getApparentType(t));
+                }
+                return getIntersectionType(propsApparentType);
+            }
+            return getApparentType(propsType);
+        }
         function defaultTryGetJsxStatelessFunctionAttributesType(openingLikeElement, elementType, elemInstanceType, elementClassType) {
             ts.Debug.assert(!(elementType.flags & 65536));
             if (!elementClassType || !isTypeAssignableTo(elemInstanceType, elementClassType)) {
@@ -33956,6 +33988,7 @@ var ts;
                     if (callSignature !== unknownSignature) {
                         var callReturnType = callSignature && getReturnTypeOfSignature(callSignature);
                         var paramType = callReturnType && (callSignature.parameters.length === 0 ? emptyObjectType : getTypeOfSymbol(callSignature.parameters[0]));
+                        paramType = getApparentTypeOfJsxPropsType(paramType);
                         if (callReturnType && isTypeAssignableTo(callReturnType, jsxStatelessElementType)) {
                             var intrinsicAttributes = getJsxType(JsxNames.IntrinsicAttributes);
                             if (intrinsicAttributes !== unknownType) {
@@ -33981,6 +34014,7 @@ var ts;
                         var candidate = candidatesOutArray_1[_i];
                         var callReturnType = getReturnTypeOfSignature(candidate);
                         var paramType = callReturnType && (candidate.parameters.length === 0 ? emptyObjectType : getTypeOfSymbol(candidate.parameters[0]));
+                        paramType = getApparentTypeOfJsxPropsType(paramType);
                         if (callReturnType && isTypeAssignableTo(callReturnType, jsxStatelessElementType)) {
                             var shouldBeCandidate = true;
                             for (var _a = 0, _b = openingLikeElement.attributes.properties; _a < _b.length; _a++) {
@@ -34184,6 +34218,24 @@ var ts;
             }
             checkJsxAttributesAssignableToTagNameAttributes(node);
         }
+        function isKnownProperty(targetType, name, isComparingJsxAttributes) {
+            if (targetType.flags & 32768) {
+                var resolved = resolveStructuredTypeMembers(targetType);
+                if (resolved.stringIndexInfo || resolved.numberIndexInfo && isNumericLiteralName(name) ||
+                    getPropertyOfType(targetType, name) || isComparingJsxAttributes && !isUnhyphenatedJsxName(name)) {
+                    return true;
+                }
+            }
+            else if (targetType.flags & 196608) {
+                for (var _i = 0, _a = targetType.types; _i < _a.length; _i++) {
+                    var t = _a[_i];
+                    if (isKnownProperty(t, name, isComparingJsxAttributes)) {
+                        return true;
+                    }
+                }
+            }
+            return false;
+        }
         function checkJsxAttributesAssignableToTagNameAttributes(openingLikeElement) {
             var targetAttributesType = isJsxIntrinsicIdentifier(openingLikeElement.tagName) ?
                 getIntrinsicAttributesTypeFromJsxOpeningLikeElement(openingLikeElement) :
@@ -34195,7 +34247,16 @@ var ts;
                 error(openingLikeElement, ts.Diagnostics.JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property, getJsxElementPropertiesName());
             }
             else {
-                checkTypeAssignableTo(sourceAttributesType, targetAttributesType, openingLikeElement.attributes.properties.length > 0 ? openingLikeElement.attributes : openingLikeElement);
+                var isSourceAttributeTypeAssignableToTarget = checkTypeAssignableTo(sourceAttributesType, targetAttributesType, openingLikeElement.attributes.properties.length > 0 ? openingLikeElement.attributes : openingLikeElement);
+                if (isSourceAttributeTypeAssignableToTarget && !isTypeAny(sourceAttributesType) && !isTypeAny(targetAttributesType)) {
+                    for (var _i = 0, _a = openingLikeElement.attributes.properties; _i < _a.length; _i++) {
+                        var attribute = _a[_i];
+                        if (ts.isJsxAttribute(attribute) && !isKnownProperty(targetAttributesType, attribute.name.text, true)) {
+                            error(attribute, ts.Diagnostics.Property_0_does_not_exist_on_type_1, attribute.name.text, typeToString(targetAttributesType));
+                            break;
+                        }
+                    }
+                }
             }
         }
         function checkJsxExpression(node, checkMode) {
@@ -35171,7 +35232,7 @@ var ts;
             }
             var valueDecl = expressionType.symbol && getClassLikeDeclarationOfSymbol(expressionType.symbol);
             if (valueDecl && ts.getModifierFlags(valueDecl) & 128) {
-                error(node, ts.Diagnostics.Cannot_create_an_instance_of_the_abstract_class_0, ts.declarationNameToString(valueDecl.name));
+                error(node, ts.Diagnostics.Cannot_create_an_instance_of_the_abstract_class_0, ts.declarationNameToString(ts.getNameOfDeclaration(valueDecl)));
                 return resolveErrorCall(node);
             }
             if (isTypeAny(expressionType)) {
@@ -35507,10 +35568,10 @@ var ts;
             var links = getSymbolLinks(parameter);
             if (!links.type) {
                 links.type = instantiateType(contextualType, mapper);
+                var name = ts.getNameOfDeclaration(parameter.valueDeclaration);
                 if (links.type === emptyObjectType &&
-                    (parameter.valueDeclaration.name.kind === 174 ||
-                        parameter.valueDeclaration.name.kind === 175)) {
-                    links.type = getTypeFromBindingPattern(parameter.valueDeclaration.name);
+                    (name.kind === 174 || name.kind === 175)) {
+                    links.type = getTypeFromBindingPattern(name);
                 }
                 assignBindingElementTypes(parameter.valueDeclaration);
             }
@@ -36943,7 +37004,7 @@ var ts;
                             continue;
                     }
                     if (names.get(memberName)) {
-                        error(member.symbol.valueDeclaration.name, ts.Diagnostics.Duplicate_identifier_0, memberName);
+                        error(ts.getNameOfDeclaration(member.symbol.valueDeclaration), ts.Diagnostics.Duplicate_identifier_0, memberName);
                         error(member.name, ts.Diagnostics.Duplicate_identifier_0, memberName);
                     }
                     else {
@@ -37017,7 +37078,8 @@ var ts;
                 return;
             }
             function containsSuperCallAsComputedPropertyName(n) {
-                return n.name && containsSuperCall(n.name);
+                var name = ts.getNameOfDeclaration(n);
+                return name && containsSuperCall(name);
             }
             function containsSuperCall(n) {
                 if (ts.isSuperCall(n)) {
@@ -37244,16 +37306,16 @@ var ts;
                     ts.forEach(overloads, function (o) {
                         var deviation = getEffectiveDeclarationFlags(o, flagsToCheck) ^ canonicalFlags_1;
                         if (deviation & 1) {
-                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_exported_or_non_exported);
+                            error(ts.getNameOfDeclaration(o), ts.Diagnostics.Overload_signatures_must_all_be_exported_or_non_exported);
                         }
                         else if (deviation & 2) {
-                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_ambient_or_non_ambient);
+                            error(ts.getNameOfDeclaration(o), ts.Diagnostics.Overload_signatures_must_all_be_ambient_or_non_ambient);
                         }
                         else if (deviation & (8 | 16)) {
-                            error(o.name || o, ts.Diagnostics.Overload_signatures_must_all_be_public_private_or_protected);
+                            error(ts.getNameOfDeclaration(o) || o, ts.Diagnostics.Overload_signatures_must_all_be_public_private_or_protected);
                         }
                         else if (deviation & 128) {
-                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_abstract_or_non_abstract);
+                            error(ts.getNameOfDeclaration(o), ts.Diagnostics.Overload_signatures_must_all_be_abstract_or_non_abstract);
                         }
                     });
                 }
@@ -37264,7 +37326,7 @@ var ts;
                     ts.forEach(overloads, function (o) {
                         var deviation = ts.hasQuestionToken(o) !== canonicalHasQuestionToken_1;
                         if (deviation) {
-                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_optional_or_required);
+                            error(ts.getNameOfDeclaration(o), ts.Diagnostics.Overload_signatures_must_all_be_optional_or_required);
                         }
                     });
                 }
@@ -37372,7 +37434,7 @@ var ts;
             }
             if (duplicateFunctionDeclaration) {
                 ts.forEach(declarations, function (declaration) {
-                    error(declaration.name, ts.Diagnostics.Duplicate_function_implementation);
+                    error(ts.getNameOfDeclaration(declaration), ts.Diagnostics.Duplicate_function_implementation);
                 });
             }
             if (lastSeenNonAmbientDeclaration && !lastSeenNonAmbientDeclaration.body &&
@@ -37435,11 +37497,12 @@ var ts;
                 for (var _b = 0, _c = symbol.declarations; _b < _c.length; _b++) {
                     var d = _c[_b];
                     var declarationSpaces = getDeclarationSpaces(d);
+                    var name = ts.getNameOfDeclaration(d);
                     if (declarationSpaces & commonDeclarationSpacesForDefaultAndNonDefault) {
-                        error(d.name, ts.Diagnostics.Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_default_0_declaration_instead, ts.declarationNameToString(d.name));
+                        error(name, ts.Diagnostics.Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_default_0_declaration_instead, ts.declarationNameToString(name));
                     }
                     else if (declarationSpaces & commonDeclarationSpacesForExportsAndLocals) {
-                        error(d.name, ts.Diagnostics.Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local, ts.declarationNameToString(d.name));
+                        error(name, ts.Diagnostics.Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local, ts.declarationNameToString(name));
                     }
                 }
             }
@@ -37801,15 +37864,16 @@ var ts;
                     if (!local.isReferenced) {
                         if (local.valueDeclaration && ts.getRootDeclaration(local.valueDeclaration).kind === 146) {
                             var parameter = ts.getRootDeclaration(local.valueDeclaration);
+                            var name = ts.getNameOfDeclaration(local.valueDeclaration);
                             if (compilerOptions.noUnusedParameters &&
                                 !ts.isParameterPropertyDeclaration(parameter) &&
                                 !ts.parameterIsThisKeyword(parameter) &&
-                                !parameterNameStartsWithUnderscore(local.valueDeclaration.name)) {
-                                error(local.valueDeclaration.name, ts.Diagnostics._0_is_declared_but_never_used, local.name);
+                                !parameterNameStartsWithUnderscore(name)) {
+                                error(name, ts.Diagnostics._0_is_declared_but_never_used, local.name);
                             }
                         }
                         else if (compilerOptions.noUnusedLocals) {
-                            ts.forEach(local.declarations, function (d) { return errorUnusedLocal(d.name || d, local.name); });
+                            ts.forEach(local.declarations, function (d) { return errorUnusedLocal(ts.getNameOfDeclaration(d) || d, local.name); });
                         }
                     }
                 });
@@ -37887,7 +37951,7 @@ var ts;
                         for (var _i = 0, _a = local.declarations; _i < _a.length; _i++) {
                             var declaration = _a[_i];
                             if (!ts.isAmbientModule(declaration)) {
-                                errorUnusedLocal(declaration.name, local.name);
+                                errorUnusedLocal(ts.getNameOfDeclaration(declaration), local.name);
                             }
                         }
                     }
@@ -37949,7 +38013,7 @@ var ts;
                 if (getNodeCheckFlags(current) & 4) {
                     var isDeclaration_1 = node.kind !== 71;
                     if (isDeclaration_1) {
-                        error(node.name, ts.Diagnostics.Duplicate_identifier_this_Compiler_uses_variable_declaration_this_to_capture_this_reference);
+                        error(ts.getNameOfDeclaration(node), ts.Diagnostics.Duplicate_identifier_this_Compiler_uses_variable_declaration_this_to_capture_this_reference);
                     }
                     else {
                         error(node, ts.Diagnostics.Expression_resolves_to_variable_declaration_this_that_compiler_uses_to_capture_this_reference);
@@ -37963,7 +38027,7 @@ var ts;
                 if (getNodeCheckFlags(current) & 8) {
                     var isDeclaration_2 = node.kind !== 71;
                     if (isDeclaration_2) {
-                        error(node.name, ts.Diagnostics.Duplicate_identifier_newTarget_Compiler_uses_variable_declaration_newTarget_to_capture_new_target_meta_property_reference);
+                        error(ts.getNameOfDeclaration(node), ts.Diagnostics.Duplicate_identifier_newTarget_Compiler_uses_variable_declaration_newTarget_to_capture_new_target_meta_property_reference);
                     }
                     else {
                         error(node, ts.Diagnostics.Expression_resolves_to_variable_declaration_newTarget_that_compiler_uses_to_capture_new_target_meta_property_reference);
@@ -38159,7 +38223,7 @@ var ts;
                     checkTypeAssignableTo(checkExpressionCached(node.initializer), declarationType, node, undefined);
                 }
                 if (!areDeclarationFlagsIdentical(node, symbol.valueDeclaration)) {
-                    error(symbol.valueDeclaration.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_modifiers, ts.declarationNameToString(node.name));
+                    error(ts.getNameOfDeclaration(symbol.valueDeclaration), ts.Diagnostics.All_declarations_of_0_must_have_identical_modifiers, ts.declarationNameToString(node.name));
                     error(node.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_modifiers, ts.declarationNameToString(node.name));
                 }
             }
@@ -38720,13 +38784,13 @@ var ts;
                     return;
                 }
                 var propDeclaration = prop.valueDeclaration;
-                if (indexKind === 1 && !(propDeclaration ? isNumericName(propDeclaration.name) : isNumericLiteralName(prop.name))) {
+                if (indexKind === 1 && !(propDeclaration ? isNumericName(ts.getNameOfDeclaration(propDeclaration)) : isNumericLiteralName(prop.name))) {
                     return;
                 }
                 var errorNode;
                 if (propDeclaration &&
-                    (ts.getSpecialPropertyAssignmentKind(propDeclaration) === 4 ||
-                        propDeclaration.name.kind === 144 ||
+                    (propDeclaration.kind === 194 ||
+                        ts.getNameOfDeclaration(propDeclaration).kind === 144 ||
                         prop.parent === containingType.symbol)) {
                     errorNode = propDeclaration;
                 }
@@ -39001,7 +39065,7 @@ var ts;
                         else {
                             errorMessage = ts.Diagnostics.Class_0_defines_instance_member_accessor_1_but_extended_class_2_defines_it_as_instance_member_function;
                         }
-                        error(derived.valueDeclaration.name || derived.valueDeclaration, errorMessage, typeToString(baseType), symbolToString(base), typeToString(type));
+                        error(ts.getNameOfDeclaration(derived.valueDeclaration) || derived.valueDeclaration, errorMessage, typeToString(baseType), symbolToString(base), typeToString(type));
                     }
                 }
             }
@@ -39269,7 +39333,7 @@ var ts;
                 if (enumSymbol.declarations.length > 1) {
                     ts.forEach(enumSymbol.declarations, function (decl) {
                         if (ts.isConstEnumDeclaration(decl) !== enumIsConst) {
-                            error(decl.name, ts.Diagnostics.Enum_declarations_must_all_be_const_or_non_const);
+                            error(ts.getNameOfDeclaration(decl), ts.Diagnostics.Enum_declarations_must_all_be_const_or_non_const);
                         }
                     });
                 }
@@ -47766,7 +47830,7 @@ var ts;
             if (enabledSubstitutions & 2 && !ts.isInternalName(node)) {
                 var declaration = resolver.getReferencedDeclarationWithCollidingName(node);
                 if (declaration && !(ts.isClassLike(declaration) && isPartOfClassBody(declaration, node))) {
-                    return ts.setTextRange(ts.getGeneratedNameForNode(declaration.name), node);
+                    return ts.setTextRange(ts.getGeneratedNameForNode(ts.getNameOfDeclaration(declaration)), node);
                 }
             }
             return node;
@@ -51441,7 +51505,7 @@ var ts;
         var errorNameNode;
         var emitJsDocComments = compilerOptions.removeComments ? ts.noop : writeJsDocComments;
         var emit = compilerOptions.stripInternal ? stripInternal : emitNode;
-        var noDeclare;
+        var needsDeclare = true;
         var moduleElementDeclarationEmitInfo = [];
         var asynchronousSubModuleDeclarationEmitInfo;
         var referencesOutput = "";
@@ -51466,11 +51530,11 @@ var ts;
             }
             resultHasExternalModuleIndicator = false;
             if (!isBundledEmit || !ts.isExternalModule(sourceFile)) {
-                noDeclare = false;
+                needsDeclare = true;
                 emitSourceFile(sourceFile);
             }
             else if (ts.isExternalModule(sourceFile)) {
-                noDeclare = true;
+                needsDeclare = false;
                 write("declare module \"" + ts.getResolvedExternalModuleName(host, sourceFile) + "\" {");
                 writeLine();
                 increaseIndent();
@@ -51887,9 +51951,9 @@ var ts;
                 }
             }
         }
-        function emitTempVariableDeclaration(expr, baseName, diagnostic) {
+        function emitTempVariableDeclaration(expr, baseName, diagnostic, needsDeclare) {
             var tempVarName = getExportTempVariableName(baseName);
-            if (!noDeclare) {
+            if (needsDeclare) {
                 write("declare ");
             }
             write("const ");
@@ -51910,7 +51974,7 @@ var ts;
                 var tempVarName = emitTempVariableDeclaration(node.expression, "_default", {
                     diagnosticMessage: ts.Diagnostics.Default_export_of_the_module_has_or_is_using_private_name_0,
                     errorNode: node
-                });
+                }, needsDeclare);
                 write(node.isExportEquals ? "export = " : "export default ");
                 write(tempVarName);
             }
@@ -51989,7 +52053,7 @@ var ts;
                 if (modifiers & 512) {
                     write("default ");
                 }
-                else if (node.kind !== 230 && !noDeclare) {
+                else if (node.kind !== 230 && needsDeclare) {
                     write("declare ");
                 }
             }
@@ -52339,7 +52403,7 @@ var ts;
                     return {
                         diagnosticMessage: diagnosticMessage,
                         errorNode: node,
-                        typeName: node.parent.parent.name
+                        typeName: ts.getNameOfDeclaration(node.parent.parent)
                     };
                 }
             }
@@ -52365,7 +52429,7 @@ var ts;
                         diagnosticMessage: ts.Diagnostics.extends_clause_of_exported_class_0_has_or_is_using_private_name_1,
                         errorNode: baseTypeNode,
                         typeName: node.name
-                    });
+                    }, !ts.findAncestor(node, function (n) { return n.kind === 233; }));
             }
             emitJsDocComments(node);
             emitModuleElementDeclarationFlags(node);
@@ -57712,7 +57776,7 @@ var ts;
                 case 153:
                 case 154:
                 case 233:
-                    return node.parent.name === node;
+                    return ts.getNameOfDeclaration(node.parent) === node;
                 case 180:
                     return node.parent.argumentExpression === node;
                 case 144:
@@ -61156,7 +61220,7 @@ var ts;
                         }
                     }
                     else {
-                        existingName = m.name.text;
+                        existingName = ts.getNameOfDeclaration(m).text;
                     }
                     existingMemberNames.set(existingName, true);
                 }
@@ -62224,8 +62288,8 @@ var ts;
             if (symbol.name !== "default") {
                 return symbol.name;
             }
-            var name = ts.forEach(symbol.declarations, function (_a) {
-                var name = _a.name;
+            var name = ts.forEach(symbol.declarations, function (decl) {
+                var name = ts.getNameOfDeclaration(decl);
                 return name && name.kind === 71 && name.text;
             });
             ts.Debug.assert(!!name);
@@ -62877,7 +62941,7 @@ var ts;
                 var flags = _a.flags, valueDeclaration = _a.valueDeclaration;
                 var shorthandValueSymbol = state.checker.getShorthandAssignmentValueSymbol(valueDeclaration);
                 if (!(flags & 134217728) && search.includes(shorthandValueSymbol)) {
-                    addReference(valueDeclaration.name, shorthandValueSymbol, search.location, state);
+                    addReference(ts.getNameOfDeclaration(valueDeclaration), shorthandValueSymbol, search.location, state);
                 }
             }
             function addReference(referenceLocation, relatedSymbol, searchLocation, state) {
@@ -63626,7 +63690,7 @@ var ts;
             }
         }
         function createDefinitionInfo(node, symbolKind, symbolName, containerName) {
-            return createDefinitionInfoFromName(node.name || node, symbolKind, symbolName, containerName);
+            return createDefinitionInfoFromName(ts.getNameOfDeclaration(node) || node, symbolKind, symbolName, containerName);
         }
         function createDefinitionInfoFromName(name, symbolKind, symbolName, containerName) {
             var sourceFile = name.getSourceFile();
@@ -64149,16 +64213,19 @@ var ts;
                 return undefined;
             }
             function tryAddSingleDeclarationName(declaration, containers) {
-                if (declaration && declaration.name) {
-                    var text = getTextOfIdentifierOrLiteral(declaration.name);
-                    if (text !== undefined) {
-                        containers.unshift(text);
-                    }
-                    else if (declaration.name.kind === 144) {
-                        return tryAddComputedPropertyName(declaration.name.expression, containers, true);
-                    }
-                    else {
-                        return false;
+                if (declaration) {
+                    var name = ts.getNameOfDeclaration(declaration);
+                    if (name) {
+                        var text = getTextOfIdentifierOrLiteral(name);
+                        if (text !== undefined) {
+                            containers.unshift(text);
+                        }
+                        else if (name.kind === 144) {
+                            return tryAddComputedPropertyName(name.expression, containers, true);
+                        }
+                        else {
+                            return false;
+                        }
                     }
                 }
                 return true;
@@ -64182,8 +64249,9 @@ var ts;
             }
             function getContainers(declaration) {
                 var containers = [];
-                if (declaration.name.kind === 144) {
-                    if (!tryAddComputedPropertyName(declaration.name.expression, containers, false)) {
+                var name = ts.getNameOfDeclaration(declaration);
+                if (name.kind === 144) {
+                    if (!tryAddComputedPropertyName(name.expression, containers, false)) {
                         return undefined;
                     }
                 }
@@ -64216,6 +64284,7 @@ var ts;
             function createNavigateToItem(rawItem) {
                 var declaration = rawItem.declaration;
                 var container = ts.getContainerNode(declaration);
+                var containerName = container && ts.getNameOfDeclaration(container);
                 return {
                     name: rawItem.name,
                     kind: ts.getNodeKind(declaration),
@@ -64224,8 +64293,8 @@ var ts;
                     isCaseSensitive: rawItem.isCaseSensitive,
                     fileName: rawItem.fileName,
                     textSpan: ts.createTextSpanFromNode(declaration),
-                    containerName: container && container.name ? container.name.text : "",
-                    containerKind: container && container.name ? ts.getNodeKind(container) : ""
+                    containerName: containerName ? containerName.text : "",
+                    containerKind: containerName ? ts.getNodeKind(container) : ""
                 };
             }
         }
@@ -64439,8 +64508,8 @@ var ts;
         function mergeChildren(children) {
             var nameToItems = ts.createMap();
             ts.filterMutate(children, function (child) {
-                var decl = child.node;
-                var name = decl.name && nodeText(decl.name);
+                var declName = ts.getNameOfDeclaration(child.node);
+                var name = declName && nodeText(declName);
                 if (!name) {
                     return true;
                 }
@@ -64518,9 +64587,9 @@ var ts;
             if (node.kind === 233) {
                 return getModuleName(node);
             }
-            var decl = node;
-            if (decl.name) {
-                return ts.getPropertyNameForPropertyNameNode(decl.name);
+            var declName = ts.getNameOfDeclaration(node);
+            if (declName) {
+                return ts.getPropertyNameForPropertyNameNode(declName);
             }
             switch (node.kind) {
                 case 186:
@@ -64537,7 +64606,7 @@ var ts;
             if (node.kind === 233) {
                 return getModuleName(node);
             }
-            var name = node.name;
+            var name = ts.getNameOfDeclaration(node);
             if (name) {
                 var text = nodeText(name);
                 if (text.length > 0) {
@@ -68165,7 +68234,7 @@ var ts;
                         }
                     case 149:
                     case 146:
-                        return node.name.kind;
+                        return ts.getNameOfDeclaration(node).kind;
                 }
             }
             function getDynamicIndentation(node, nodeStartLine, indentation, delta) {
@@ -70643,7 +70712,7 @@ var ts;
                 return undefined;
             }
             var declaration = declarations[0];
-            var name = ts.getSynthesizedClone(declaration.name);
+            var name = ts.getSynthesizedClone(ts.getNameOfDeclaration(declaration));
             var visibilityModifier = createVisibilityModifier(ts.getModifierFlags(declaration));
             var modifiers = visibilityModifier ? ts.createNodeArray([visibilityModifier]) : undefined;
             var type = checker.getWidenedType(checker.getTypeOfSymbolAtLocation(symbol, enclosingDeclaration));
@@ -71131,13 +71200,14 @@ var ts;
                 return declarations;
             }
             function getDeclarationName(declaration) {
-                if (declaration.name) {
-                    var result_7 = getTextOfIdentifierOrLiteral(declaration.name);
+                var name = ts.getNameOfDeclaration(declaration);
+                if (name) {
+                    var result_7 = getTextOfIdentifierOrLiteral(name);
                     if (result_7 !== undefined) {
                         return result_7;
                     }
-                    if (declaration.name.kind === 144) {
-                        var expr = declaration.name.expression;
+                    if (name.kind === 144) {
+                        var expr = name.expression;
                         if (expr.kind === 179) {
                             return expr.name.text;
                         }
@@ -78462,6 +78532,9 @@ var ts;
                 var compilerOptions = JSON.parse(compilerOptionsJson);
                 var result = ts.resolveModuleName(moduleName, ts.normalizeSlashes(fileName), compilerOptions, _this.host);
                 var resolvedFileName = result.resolvedModule ? result.resolvedModule.resolvedFileName : undefined;
+                if (result.resolvedModule && result.resolvedModule.extension !== ts.Extension.Ts && result.resolvedModule.extension !== ts.Extension.Tsx && result.resolvedModule.extension !== ts.Extension.Dts) {
+                    resolvedFileName = undefined;
+                }
                 return {
                     resolvedFileName: resolvedFileName,
                     failedLookupLocations: result.failedLookupLocations

lib/typescript.d.ts

@@ -491,9 +491,11 @@ declare namespace ts {
     type DeclarationName = Identifier | StringLiteral | NumericLiteral | ComputedPropertyName | BindingPattern;
     interface Declaration extends Node {
         _declarationBrand: any;
+    }
+    interface NamedDeclaration extends Declaration {
         name?: DeclarationName;
     }
-    interface DeclarationStatement extends Declaration, Statement {
+    interface DeclarationStatement extends NamedDeclaration, Statement {
         name?: Identifier | StringLiteral | NumericLiteral;
     }
     interface ComputedPropertyName extends Node {
@@ -504,7 +506,7 @@ declare namespace ts {
         kind: SyntaxKind.Decorator;
         expression: LeftHandSideExpression;
     }
-    interface TypeParameterDeclaration extends Declaration {
+    interface TypeParameterDeclaration extends NamedDeclaration {
         kind: SyntaxKind.TypeParameter;
         parent?: DeclarationWithTypeParameters;
         name: Identifier;
@@ -512,7 +514,7 @@ declare namespace ts {
         default?: TypeNode;
         expression?: Expression;
     }
-    interface SignatureDeclaration extends Declaration {
+    interface SignatureDeclaration extends NamedDeclaration {
         name?: PropertyName;
         typeParameters?: NodeArray<TypeParameterDeclaration>;
         parameters: NodeArray<ParameterDeclaration>;
@@ -525,7 +527,7 @@ declare namespace ts {
         kind: SyntaxKind.ConstructSignature;
     }
     type BindingName = Identifier | BindingPattern;
-    interface VariableDeclaration extends Declaration {
+    interface VariableDeclaration extends NamedDeclaration {
         kind: SyntaxKind.VariableDeclaration;
         parent?: VariableDeclarationList | CatchClause;
         name: BindingName;
@@ -537,7 +539,7 @@ declare namespace ts {
         parent?: VariableStatement | ForStatement | ForOfStatement | ForInStatement;
         declarations: NodeArray<VariableDeclaration>;
     }
-    interface ParameterDeclaration extends Declaration {
+    interface ParameterDeclaration extends NamedDeclaration {
         kind: SyntaxKind.Parameter;
         parent?: SignatureDeclaration;
         dotDotDotToken?: DotDotDotToken;
@@ -546,7 +548,7 @@ declare namespace ts {
         type?: TypeNode;
         initializer?: Expression;
     }
-    interface BindingElement extends Declaration {
+    interface BindingElement extends NamedDeclaration {
         kind: SyntaxKind.BindingElement;
         parent?: BindingPattern;
         propertyName?: PropertyName;
@@ -568,7 +570,7 @@ declare namespace ts {
         type?: TypeNode;
         initializer?: Expression;
     }
-    interface ObjectLiteralElement extends Declaration {
+    interface ObjectLiteralElement extends NamedDeclaration {
         _objectLiteralBrandBrand: any;
         name?: PropertyName;
     }
@@ -590,7 +592,7 @@ declare namespace ts {
         kind: SyntaxKind.SpreadAssignment;
         expression: Expression;
     }
-    interface VariableLikeDeclaration extends Declaration {
+    interface VariableLikeDeclaration extends NamedDeclaration {
         propertyName?: PropertyName;
         dotDotDotToken?: DotDotDotToken;
         name: DeclarationName;
@@ -598,7 +600,7 @@ declare namespace ts {
         type?: TypeNode;
         initializer?: Expression;
     }
-    interface PropertyLikeDeclaration extends Declaration {
+    interface PropertyLikeDeclaration extends NamedDeclaration {
         name: PropertyName;
     }
     interface ObjectBindingPattern extends Node {
@@ -950,7 +952,7 @@ declare namespace ts {
     }
     type EntityNameExpression = Identifier | PropertyAccessEntityNameExpression | ParenthesizedExpression;
     type EntityNameOrEntityNameExpression = EntityName | EntityNameExpression;
-    interface PropertyAccessExpression extends MemberExpression, Declaration {
+    interface PropertyAccessExpression extends MemberExpression, NamedDeclaration {
         kind: SyntaxKind.PropertyAccessExpression;
         expression: LeftHandSideExpression;
         name: Identifier;
@@ -1197,7 +1199,7 @@ declare namespace ts {
         block: Block;
     }
     type DeclarationWithTypeParameters = SignatureDeclaration | ClassLikeDeclaration | InterfaceDeclaration | TypeAliasDeclaration;
-    interface ClassLikeDeclaration extends Declaration {
+    interface ClassLikeDeclaration extends NamedDeclaration {
         name?: Identifier;
         typeParameters?: NodeArray<TypeParameterDeclaration>;
         heritageClauses?: NodeArray<HeritageClause>;
@@ -1210,11 +1212,11 @@ declare namespace ts {
     interface ClassExpression extends ClassLikeDeclaration, PrimaryExpression {
         kind: SyntaxKind.ClassExpression;
     }
-    interface ClassElement extends Declaration {
+    interface ClassElement extends NamedDeclaration {
         _classElementBrand: any;
         name?: PropertyName;
     }
-    interface TypeElement extends Declaration {
+    interface TypeElement extends NamedDeclaration {
         _typeElementBrand: any;
         name?: PropertyName;
         questionToken?: QuestionToken;
@@ -1238,7 +1240,7 @@ declare namespace ts {
         typeParameters?: NodeArray<TypeParameterDeclaration>;
         type: TypeNode;
     }
-    interface EnumMember extends Declaration {
+    interface EnumMember extends NamedDeclaration {
         kind: SyntaxKind.EnumMember;
         parent?: EnumDeclaration;
         name: PropertyName;
@@ -1297,13 +1299,13 @@ declare namespace ts {
         moduleSpecifier: Expression;
     }
     type NamedImportBindings = NamespaceImport | NamedImports;
-    interface ImportClause extends Declaration {
+    interface ImportClause extends NamedDeclaration {
         kind: SyntaxKind.ImportClause;
         parent?: ImportDeclaration;
         name?: Identifier;
         namedBindings?: NamedImportBindings;
     }
-    interface NamespaceImport extends Declaration {
+    interface NamespaceImport extends NamedDeclaration {
         kind: SyntaxKind.NamespaceImport;
         parent?: ImportClause;
         name: Identifier;
@@ -1330,13 +1332,13 @@ declare namespace ts {
         elements: NodeArray<ExportSpecifier>;
     }
     type NamedImportsOrExports = NamedImports | NamedExports;
-    interface ImportSpecifier extends Declaration {
+    interface ImportSpecifier extends NamedDeclaration {
         kind: SyntaxKind.ImportSpecifier;
         parent?: NamedImports;
         propertyName?: Identifier;
         name: Identifier;
     }
-    interface ExportSpecifier extends Declaration {
+    interface ExportSpecifier extends NamedDeclaration {
         kind: SyntaxKind.ExportSpecifier;
         parent?: NamedExports;
         propertyName?: Identifier;
@@ -1467,7 +1469,7 @@ declare namespace ts {
         kind: SyntaxKind.JSDocTypeTag;
         typeExpression: JSDocTypeExpression;
     }
-    interface JSDocTypedefTag extends JSDocTag, Declaration {
+    interface JSDocTypedefTag extends JSDocTag, NamedDeclaration {
         kind: SyntaxKind.JSDocTypedefTag;
         fullName?: JSDocNamespaceDeclaration | Identifier;
         name?: Identifier;

lib/typescript.js

@@ -8249,6 +8249,36 @@ var ts;
         return false;
     }
     ts.isDeclarationName = isDeclarationName;
+    function getNameOfDeclaration(declaration) {
+        if (!declaration) {
+            return undefined;
+        }
+        if (declaration.kind === 194 /* BinaryExpression */) {
+            var kind = getSpecialPropertyAssignmentKind(declaration);
+            var lhs = declaration.left;
+            switch (kind) {
+                case 0 /* None */:
+                case 2 /* ModuleExports */:
+                    return undefined;
+                case 1 /* ExportsProperty */:
+                    if (lhs.kind === 71 /* Identifier */) {
+                        return lhs.name;
+                    }
+                    else {
+                        return lhs.expression.name;
+                    }
+                case 4 /* ThisProperty */:
+                case 5 /* Property */:
+                    return lhs.name;
+                case 3 /* PrototypeProperty */:
+                    return lhs.expression.name;
+            }
+        }
+        else {
+            return declaration.name;
+        }
+    }
+    ts.getNameOfDeclaration = getNameOfDeclaration;
     function isLiteralComputedPropertyDeclarationName(node) {
         return (node.kind === 9 /* StringLiteral */ || node.kind === 8 /* NumericLiteral */) &&
             node.parent.kind === 144 /* ComputedPropertyName */ &&
@@ -8462,7 +8492,8 @@ var ts;
      *      Symbol.
      */
     function hasDynamicName(declaration) {
-        return declaration.name && isDynamicName(declaration.name);
+        var name = getNameOfDeclaration(declaration);
+        return name && isDynamicName(name);
     }
     ts.hasDynamicName = hasDynamicName;
     function isDynamicName(name) {
@@ -13679,9 +13710,10 @@ var ts;
     }
     ts.getDeclarationName = getDeclarationName;
     function getName(node, allowComments, allowSourceMaps, emitFlags) {
-        if (node.name && ts.isIdentifier(node.name) && !ts.isGeneratedIdentifier(node.name)) {
-            var name = ts.getMutableClone(node.name);
-            emitFlags |= ts.getEmitFlags(node.name);
+        var nodeName = ts.getNameOfDeclaration(node);
+        if (nodeName && ts.isIdentifier(nodeName) && !ts.isGeneratedIdentifier(nodeName)) {
+            var name = ts.getMutableClone(nodeName);
+            emitFlags |= ts.getEmitFlags(nodeName);
             if (!allowSourceMaps)
                 emitFlags |= 48 /* NoSourceMap */;
             if (!allowComments)
@@ -21510,12 +21542,13 @@ var ts;
         // Should not be called on a declaration with a computed property name,
         // unless it is a well known Symbol.
         function getDeclarationName(node) {
-            if (node.name) {
+            var name = ts.getNameOfDeclaration(node);
+            if (name) {
                 if (ts.isAmbientModule(node)) {
-                    return ts.isGlobalScopeAugmentation(node) ? "__global" : "\"" + node.name.text + "\"";
+                    return ts.isGlobalScopeAugmentation(node) ? "__global" : "\"" + name.text + "\"";
                 }
-                if (node.name.kind === 144 /* ComputedPropertyName */) {
-                    var nameExpression = node.name.expression;
+                if (name.kind === 144 /* ComputedPropertyName */) {
+                    var nameExpression = name.expression;
                     // treat computed property names where expression is string/numeric literal as just string/numeric literal
                     if (ts.isStringOrNumericLiteral(nameExpression)) {
                         return nameExpression.text;
@@ -21523,7 +21556,7 @@ var ts;
                     ts.Debug.assert(ts.isWellKnownSymbolSyntactically(nameExpression));
                     return ts.getPropertyNameForKnownSymbolName(nameExpression.name.text);
                 }
-                return node.name.text;
+                return name.text;
             }
             switch (node.kind) {
                 case 152 /* Constructor */:
@@ -21667,9 +21700,9 @@ var ts;
                             }
                         }
                         ts.forEach(symbol.declarations, function (declaration) {
-                            file.bindDiagnostics.push(ts.createDiagnosticForNode(declaration.name || declaration, message_1, getDisplayName(declaration)));
+                            file.bindDiagnostics.push(ts.createDiagnosticForNode(ts.getNameOfDeclaration(declaration) || declaration, message_1, getDisplayName(declaration)));
                         });
-                        file.bindDiagnostics.push(ts.createDiagnosticForNode(node.name || node, message_1, getDisplayName(node)));
+                        file.bindDiagnostics.push(ts.createDiagnosticForNode(ts.getNameOfDeclaration(node) || node, message_1, getDisplayName(node)));
                         symbol = createSymbol(0 /* None */, name);
                     }
                 }
@@ -25965,16 +25998,16 @@ var ts;
                 recordMergedSymbol(target, source);
             }
             else if (target.flags & 1024 /* NamespaceModule */) {
-                error(source.declarations[0].name, ts.Diagnostics.Cannot_augment_module_0_with_value_exports_because_it_resolves_to_a_non_module_entity, symbolToString(target));
+                error(ts.getNameOfDeclaration(source.declarations[0]), ts.Diagnostics.Cannot_augment_module_0_with_value_exports_because_it_resolves_to_a_non_module_entity, symbolToString(target));
             }
             else {
                 var message_2 = target.flags & 2 /* BlockScopedVariable */ || source.flags & 2 /* BlockScopedVariable */
                     ? ts.Diagnostics.Cannot_redeclare_block_scoped_variable_0 : ts.Diagnostics.Duplicate_identifier_0;
                 ts.forEach(source.declarations, function (node) {
-                    error(node.name ? node.name : node, message_2, symbolToString(source));
+                    error(ts.getNameOfDeclaration(node) || node, message_2, symbolToString(source));
                 });
                 ts.forEach(target.declarations, function (node) {
-                    error(node.name ? node.name : node, message_2, symbolToString(source));
+                    error(ts.getNameOfDeclaration(node) || node, message_2, symbolToString(source));
                 });
             }
         }
@@ -26102,7 +26135,8 @@ var ts;
             var useFile = ts.getSourceFileOfNode(usage);
             if (declarationFile !== useFile) {
                 if ((modulekind && (declarationFile.externalModuleIndicator || useFile.externalModuleIndicator)) ||
-                    (!compilerOptions.outFile && !compilerOptions.out)) {
+                    (!compilerOptions.outFile && !compilerOptions.out) ||
+                    ts.isInAmbientContext(declaration)) {
                     // nodes are in different files and order cannot be determined
                     return true;
                 }
@@ -26566,13 +26600,13 @@ var ts;
             ts.Debug.assert(declaration !== undefined, "Declaration to checkResolvedBlockScopedVariable is undefined");
             if (!ts.isInAmbientContext(declaration) && !isBlockScopedNameDeclaredBeforeUse(declaration, errorLocation)) {
                 if (result.flags & 2 /* BlockScopedVariable */) {
-                    error(errorLocation, ts.Diagnostics.Block_scoped_variable_0_used_before_its_declaration, ts.declarationNameToString(declaration.name));
+                    error(errorLocation, ts.Diagnostics.Block_scoped_variable_0_used_before_its_declaration, ts.declarationNameToString(ts.getNameOfDeclaration(declaration)));
                 }
                 else if (result.flags & 32 /* Class */) {
-                    error(errorLocation, ts.Diagnostics.Class_0_used_before_its_declaration, ts.declarationNameToString(declaration.name));
+                    error(errorLocation, ts.Diagnostics.Class_0_used_before_its_declaration, ts.declarationNameToString(ts.getNameOfDeclaration(declaration)));
                 }
                 else if (result.flags & 384 /* Enum */) {
-                    error(errorLocation, ts.Diagnostics.Enum_0_used_before_its_declaration, ts.declarationNameToString(declaration.name));
+                    error(errorLocation, ts.Diagnostics.Enum_0_used_before_its_declaration, ts.declarationNameToString(ts.getNameOfDeclaration(declaration)));
                 }
             }
         }
@@ -27948,8 +27982,9 @@ var ts;
                 function getNameOfSymbol(symbol) {
                     var declaration = ts.firstOrUndefined(symbol.declarations);
                     if (declaration) {
-                        if (declaration.name) {
-                            return ts.declarationNameToString(declaration.name);
+                        var name = ts.getNameOfDeclaration(declaration);
+                        if (name) {
+                            return ts.declarationNameToString(name);
                         }
                         if (declaration.parent && declaration.parent.kind === 226 /* VariableDeclaration */) {
                             return ts.declarationNameToString(declaration.parent.name);
@@ -28030,8 +28065,9 @@ var ts;
         function getNameOfSymbol(symbol) {
             if (symbol.declarations && symbol.declarations.length) {
                 var declaration = symbol.declarations[0];
-                if (declaration.name) {
-                    return ts.declarationNameToString(declaration.name);
+                var name = ts.getNameOfDeclaration(declaration);
+                if (name) {
+                    return ts.declarationNameToString(name);
                 }
                 if (declaration.parent && declaration.parent.kind === 226 /* VariableDeclaration */) {
                     return ts.declarationNameToString(declaration.parent.name);
@@ -31222,8 +31258,9 @@ var ts;
                     type = anyType;
                     if (noImplicitAny) {
                         var declaration = signature.declaration;
-                        if (declaration.name) {
-                            error(declaration.name, ts.Diagnostics._0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions, ts.declarationNameToString(declaration.name));
+                        var name = ts.getNameOfDeclaration(declaration);
+                        if (name) {
+                            error(name, ts.Diagnostics._0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions, ts.declarationNameToString(name));
                         }
                         else {
                             error(declaration, ts.Diagnostics.Function_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions);
@@ -33350,29 +33387,6 @@ var ts;
                 }
                 return 0 /* False */;
             }
-            // Check if a property with the given name is known anywhere in the given type. In an object type, a property
-            // is considered known if the object type is empty and the check is for assignability, if the object type has
-            // index signatures, or if the property is actually declared in the object type. In a union or intersection
-            // type, a property is considered known if it is known in any constituent type.
-            function isKnownProperty(type, name, isComparingJsxAttributes) {
-                if (type.flags & 32768 /* Object */) {
-                    var resolved = resolveStructuredTypeMembers(type);
-                    if (resolved.stringIndexInfo || resolved.numberIndexInfo && isNumericLiteralName(name) ||
-                        getPropertyOfType(type, name) || isComparingJsxAttributes && !isUnhyphenatedJsxName(name)) {
-                        // For JSXAttributes, if the attribute has a hyphenated name, consider that the attribute to be known.
-                        return true;
-                    }
-                }
-                else if (type.flags & 196608 /* UnionOrIntersection */) {
-                    for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
-                        var t = _a[_i];
-                        if (isKnownProperty(t, name, isComparingJsxAttributes)) {
-                            return true;
-                        }
-                    }
-                }
-                return false;
-            }
             function hasExcessProperties(source, target, reportErrors) {
                 if (maybeTypeOfKind(target, 32768 /* Object */) && !(getObjectFlags(target) & 512 /* ObjectLiteralPatternWithComputedProperties */)) {
                     var isComparingJsxAttributes = !!(source.flags & 33554432 /* JsxAttributes */);
@@ -34523,7 +34537,7 @@ var ts;
                 default:
                     diagnostic = ts.Diagnostics.Variable_0_implicitly_has_an_1_type;
             }
-            error(declaration, diagnostic, ts.declarationNameToString(declaration.name), typeAsString);
+            error(declaration, diagnostic, ts.declarationNameToString(ts.getNameOfDeclaration(declaration)), typeAsString);
         }
         function reportErrorsFromWidening(declaration, type) {
             if (produceDiagnostics && noImplicitAny && type.flags & 2097152 /* ContainsWideningType */) {
@@ -36303,7 +36317,7 @@ var ts;
             if (type === autoType || type === autoArrayType) {
                 if (flowType === autoType || flowType === autoArrayType) {
                     if (noImplicitAny) {
-                        error(declaration.name, ts.Diagnostics.Variable_0_implicitly_has_type_1_in_some_locations_where_its_type_cannot_be_determined, symbolToString(symbol), typeToString(flowType));
+                        error(ts.getNameOfDeclaration(declaration), ts.Diagnostics.Variable_0_implicitly_has_type_1_in_some_locations_where_its_type_cannot_be_determined, symbolToString(symbol), typeToString(flowType));
                         error(node, ts.Diagnostics.Variable_0_implicitly_has_an_1_type, symbolToString(symbol), typeToString(flowType));
                     }
                     return convertAutoToAny(flowType);
@@ -37581,6 +37595,8 @@ var ts;
             var spread = emptyObjectType;
             var attributesArray = [];
             var hasSpreadAnyType = false;
+            var explicitlySpecifyChildrenAttribute = false;
+            var jsxChildrenPropertyName = getJsxElementChildrenPropertyname();
             for (var _i = 0, _a = attributes.properties; _i < _a.length; _i++) {
                 var attributeDecl = _a[_i];
                 var member = attributeDecl.symbol;
@@ -37598,6 +37614,9 @@ var ts;
                     attributeSymbol.target = member;
                     attributesTable.set(attributeSymbol.name, attributeSymbol);
                     attributesArray.push(attributeSymbol);
+                    if (attributeDecl.name.text === jsxChildrenPropertyName) {
+                        explicitlySpecifyChildrenAttribute = true;
+                    }
                 }
                 else {
                     ts.Debug.assert(attributeDecl.kind === 255 /* JsxSpreadAttribute */);
@@ -37606,11 +37625,7 @@ var ts;
                         attributesArray = [];
                         attributesTable = ts.createMap();
                     }
-                    var exprType = checkExpression(attributeDecl.expression);
-                    if (!isValidSpreadType(exprType)) {
-                        error(attributeDecl, ts.Diagnostics.Spread_types_may_only_be_created_from_object_types);
-                        hasSpreadAnyType = true;
-                    }
+                    var exprType = getApparentType(checkExpression(attributeDecl.expression));
                     if (isTypeAny(exprType)) {
                         hasSpreadAnyType = true;
                     }
@@ -37653,11 +37668,11 @@ var ts;
                         childrenTypes.push(checkExpression(child, checkMode));
                     }
                 }
-                // Error if there is a attribute named "children" and children element.
-                // This is because children element will overwrite the value from attributes
-                var jsxChildrenPropertyName = getJsxElementChildrenPropertyname();
                 if (!hasSpreadAnyType && jsxChildrenPropertyName && jsxChildrenPropertyName !== "") {
-                    if (attributesTable.has(jsxChildrenPropertyName)) {
+                    // Error if there is a attribute named "children" explicitly specified and children element.
+                    // This is because children element will overwrite the value from attributes.
+                    // Note: we will not warn "children" attribute overwritten if "children" attribute is specified in object spread.
+                    if (explicitlySpecifyChildrenAttribute) {
                         error(attributes, ts.Diagnostics._0_are_specified_twice_The_attribute_named_0_will_be_overwritten, jsxChildrenPropertyName);
                     }
                     // If there are children in the body of JSX element, create dummy attribute "children" with anyType so that it will pass the attribute checking process
@@ -37676,8 +37691,7 @@ var ts;
              */
             function createJsxAttributesType(symbol, attributesTable) {
                 var result = createAnonymousType(symbol, attributesTable, emptyArray, emptyArray, /*stringIndexInfo*/ undefined, /*numberIndexInfo*/ undefined);
-                var freshObjectLiteralFlag = compilerOptions.suppressExcessPropertyErrors ? 0 : 1048576 /* FreshLiteral */;
-                result.flags |= 33554432 /* JsxAttributes */ | 4194304 /* ContainsObjectLiteral */ | freshObjectLiteralFlag;
+                result.flags |= 33554432 /* JsxAttributes */ | 4194304 /* ContainsObjectLiteral */;
                 result.objectFlags |= 128 /* ObjectLiteral */;
                 return result;
             }
@@ -37818,6 +37832,20 @@ var ts;
             }
             return _jsxElementChildrenPropertyName;
         }
+        function getApparentTypeOfJsxPropsType(propsType) {
+            if (!propsType) {
+                return undefined;
+            }
+            if (propsType.flags & 131072 /* Intersection */) {
+                var propsApparentType = [];
+                for (var _i = 0, _a = propsType.types; _i < _a.length; _i++) {
+                    var t = _a[_i];
+                    propsApparentType.push(getApparentType(t));
+                }
+                return getIntersectionType(propsApparentType);
+            }
+            return getApparentType(propsType);
+        }
         /**
          * Get JSX attributes type by trying to resolve openingLikeElement as a stateless function component.
          * Return only attributes type of successfully resolved call signature.
@@ -37838,6 +37866,7 @@ var ts;
                     if (callSignature !== unknownSignature) {
                         var callReturnType = callSignature && getReturnTypeOfSignature(callSignature);
                         var paramType = callReturnType && (callSignature.parameters.length === 0 ? emptyObjectType : getTypeOfSymbol(callSignature.parameters[0]));
+                        paramType = getApparentTypeOfJsxPropsType(paramType);
                         if (callReturnType && isTypeAssignableTo(callReturnType, jsxStatelessElementType)) {
                             // Intersect in JSX.IntrinsicAttributes if it exists
                             var intrinsicAttributes = getJsxType(JsxNames.IntrinsicAttributes);
@@ -37876,6 +37905,7 @@ var ts;
                         var candidate = candidatesOutArray_1[_i];
                         var callReturnType = getReturnTypeOfSignature(candidate);
                         var paramType = callReturnType && (candidate.parameters.length === 0 ? emptyObjectType : getTypeOfSymbol(candidate.parameters[0]));
+                        paramType = getApparentTypeOfJsxPropsType(paramType);
                         if (callReturnType && isTypeAssignableTo(callReturnType, jsxStatelessElementType)) {
                             var shouldBeCandidate = true;
                             for (var _a = 0, _b = openingLikeElement.attributes.properties; _a < _b.length; _a++) {
@@ -38150,6 +38180,34 @@ var ts;
             }
             checkJsxAttributesAssignableToTagNameAttributes(node);
         }
+        /**
+         * Check if a property with the given name is known anywhere in the given type. In an object type, a property
+         * is considered known if the object type is empty and the check is for assignability, if the object type has
+         * index signatures, or if the property is actually declared in the object type. In a union or intersection
+         * type, a property is considered known if it is known in any constituent type.
+         * @param targetType a type to search a given name in
+         * @param name a property name to search
+         * @param isComparingJsxAttributes a boolean flag indicating whether we are searching in JsxAttributesType
+         */
+        function isKnownProperty(targetType, name, isComparingJsxAttributes) {
+            if (targetType.flags & 32768 /* Object */) {
+                var resolved = resolveStructuredTypeMembers(targetType);
+                if (resolved.stringIndexInfo || resolved.numberIndexInfo && isNumericLiteralName(name) ||
+                    getPropertyOfType(targetType, name) || isComparingJsxAttributes && !isUnhyphenatedJsxName(name)) {
+                    // For JSXAttributes, if the attribute has a hyphenated name, consider that the attribute to be known.
+                    return true;
+                }
+            }
+            else if (targetType.flags & 196608 /* UnionOrIntersection */) {
+                for (var _i = 0, _a = targetType.types; _i < _a.length; _i++) {
+                    var t = _a[_i];
+                    if (isKnownProperty(t, name, isComparingJsxAttributes)) {
+                        return true;
+                    }
+                }
+            }
+            return false;
+        }
         /**
          * Check whether the given attributes of JSX opening-like element is assignable to the tagName attributes.
          *      Get the attributes type of the opening-like element through resolving the tagName, "target attributes"
@@ -38178,7 +38236,20 @@ var ts;
                 error(openingLikeElement, ts.Diagnostics.JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property, getJsxElementPropertiesName());
             }
             else {
-                checkTypeAssignableTo(sourceAttributesType, targetAttributesType, openingLikeElement.attributes.properties.length > 0 ? openingLikeElement.attributes : openingLikeElement);
+                // Check if sourceAttributesType assignable to targetAttributesType though this check will allow excess properties
+                var isSourceAttributeTypeAssignableToTarget = checkTypeAssignableTo(sourceAttributesType, targetAttributesType, openingLikeElement.attributes.properties.length > 0 ? openingLikeElement.attributes : openingLikeElement);
+                // After we check for assignability, we will do another pass to check that all explicitly specified attributes have correct name corresponding in targetAttributeType.
+                // This will allow excess properties in spread type as it is very common pattern to spread outter attributes into React component in its render method.
+                if (isSourceAttributeTypeAssignableToTarget && !isTypeAny(sourceAttributesType) && !isTypeAny(targetAttributesType)) {
+                    for (var _i = 0, _a = openingLikeElement.attributes.properties; _i < _a.length; _i++) {
+                        var attribute = _a[_i];
+                        if (ts.isJsxAttribute(attribute) && !isKnownProperty(targetAttributesType, attribute.name.text, /*isComparingJsxAttributes*/ true)) {
+                            error(attribute, ts.Diagnostics.Property_0_does_not_exist_on_type_1, attribute.name.text, typeToString(targetAttributesType));
+                            // We break here so that errors won't be cascading
+                            break;
+                        }
+                    }
+                }
             }
         }
         function checkJsxExpression(node, checkMode) {
@@ -39507,7 +39578,7 @@ var ts;
             // only the class declaration node will have the Abstract flag set.
             var valueDecl = expressionType.symbol && getClassLikeDeclarationOfSymbol(expressionType.symbol);
             if (valueDecl && ts.getModifierFlags(valueDecl) & 128 /* Abstract */) {
-                error(node, ts.Diagnostics.Cannot_create_an_instance_of_the_abstract_class_0, ts.declarationNameToString(valueDecl.name));
+                error(node, ts.Diagnostics.Cannot_create_an_instance_of_the_abstract_class_0, ts.declarationNameToString(ts.getNameOfDeclaration(valueDecl)));
                 return resolveErrorCall(node);
             }
             // TS 1.0 spec: 4.11
@@ -39918,11 +39989,11 @@ var ts;
             var links = getSymbolLinks(parameter);
             if (!links.type) {
                 links.type = instantiateType(contextualType, mapper);
+                var name = ts.getNameOfDeclaration(parameter.valueDeclaration);
                 // if inference didn't come up with anything but {}, fall back to the binding pattern if present.
                 if (links.type === emptyObjectType &&
-                    (parameter.valueDeclaration.name.kind === 174 /* ObjectBindingPattern */ ||
-                        parameter.valueDeclaration.name.kind === 175 /* ArrayBindingPattern */)) {
-                    links.type = getTypeFromBindingPattern(parameter.valueDeclaration.name);
+                    (name.kind === 174 /* ObjectBindingPattern */ || name.kind === 175 /* ArrayBindingPattern */)) {
+                    links.type = getTypeFromBindingPattern(name);
                 }
                 assignBindingElementTypes(parameter.valueDeclaration);
             }
@@ -41597,7 +41668,7 @@ var ts;
                             continue;
                     }
                     if (names.get(memberName)) {
-                        error(member.symbol.valueDeclaration.name, ts.Diagnostics.Duplicate_identifier_0, memberName);
+                        error(ts.getNameOfDeclaration(member.symbol.valueDeclaration), ts.Diagnostics.Duplicate_identifier_0, memberName);
                         error(member.name, ts.Diagnostics.Duplicate_identifier_0, memberName);
                     }
                     else {
@@ -41685,7 +41756,8 @@ var ts;
                 return;
             }
             function containsSuperCallAsComputedPropertyName(n) {
-                return n.name && containsSuperCall(n.name);
+                var name = ts.getNameOfDeclaration(n);
+                return name && containsSuperCall(name);
             }
             function containsSuperCall(n) {
                 if (ts.isSuperCall(n)) {
@@ -41945,16 +42017,16 @@ var ts;
                     ts.forEach(overloads, function (o) {
                         var deviation = getEffectiveDeclarationFlags(o, flagsToCheck) ^ canonicalFlags_1;
                         if (deviation & 1 /* Export */) {
-                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_exported_or_non_exported);
+                            error(ts.getNameOfDeclaration(o), ts.Diagnostics.Overload_signatures_must_all_be_exported_or_non_exported);
                         }
                         else if (deviation & 2 /* Ambient */) {
-                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_ambient_or_non_ambient);
+                            error(ts.getNameOfDeclaration(o), ts.Diagnostics.Overload_signatures_must_all_be_ambient_or_non_ambient);
                         }
                         else if (deviation & (8 /* Private */ | 16 /* Protected */)) {
-                            error(o.name || o, ts.Diagnostics.Overload_signatures_must_all_be_public_private_or_protected);
+                            error(ts.getNameOfDeclaration(o) || o, ts.Diagnostics.Overload_signatures_must_all_be_public_private_or_protected);
                         }
                         else if (deviation & 128 /* Abstract */) {
-                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_abstract_or_non_abstract);
+                            error(ts.getNameOfDeclaration(o), ts.Diagnostics.Overload_signatures_must_all_be_abstract_or_non_abstract);
                         }
                     });
                 }
@@ -41965,7 +42037,7 @@ var ts;
                     ts.forEach(overloads, function (o) {
                         var deviation = ts.hasQuestionToken(o) !== canonicalHasQuestionToken_1;
                         if (deviation) {
-                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_optional_or_required);
+                            error(ts.getNameOfDeclaration(o), ts.Diagnostics.Overload_signatures_must_all_be_optional_or_required);
                         }
                     });
                 }
@@ -42089,7 +42161,7 @@ var ts;
             }
             if (duplicateFunctionDeclaration) {
                 ts.forEach(declarations, function (declaration) {
-                    error(declaration.name, ts.Diagnostics.Duplicate_function_implementation);
+                    error(ts.getNameOfDeclaration(declaration), ts.Diagnostics.Duplicate_function_implementation);
                 });
             }
             // Abstract methods can't have an implementation -- in particular, they don't need one.
@@ -42162,12 +42234,13 @@ var ts;
                 for (var _b = 0, _c = symbol.declarations; _b < _c.length; _b++) {
                     var d = _c[_b];
                     var declarationSpaces = getDeclarationSpaces(d);
+                    var name = ts.getNameOfDeclaration(d);
                     // Only error on the declarations that contributed to the intersecting spaces.
                     if (declarationSpaces & commonDeclarationSpacesForDefaultAndNonDefault) {
-                        error(d.name, ts.Diagnostics.Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_default_0_declaration_instead, ts.declarationNameToString(d.name));
+                        error(name, ts.Diagnostics.Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_default_0_declaration_instead, ts.declarationNameToString(name));
                     }
                     else if (declarationSpaces & commonDeclarationSpacesForExportsAndLocals) {
-                        error(d.name, ts.Diagnostics.Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local, ts.declarationNameToString(d.name));
+                        error(name, ts.Diagnostics.Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local, ts.declarationNameToString(name));
                     }
                 }
             }
@@ -42673,15 +42746,16 @@ var ts;
                     if (!local.isReferenced) {
                         if (local.valueDeclaration && ts.getRootDeclaration(local.valueDeclaration).kind === 146 /* Parameter */) {
                             var parameter = ts.getRootDeclaration(local.valueDeclaration);
+                            var name = ts.getNameOfDeclaration(local.valueDeclaration);
                             if (compilerOptions.noUnusedParameters &&
                                 !ts.isParameterPropertyDeclaration(parameter) &&
                                 !ts.parameterIsThisKeyword(parameter) &&
-                                !parameterNameStartsWithUnderscore(local.valueDeclaration.name)) {
-                                error(local.valueDeclaration.name, ts.Diagnostics._0_is_declared_but_never_used, local.name);
+                                !parameterNameStartsWithUnderscore(name)) {
+                                error(name, ts.Diagnostics._0_is_declared_but_never_used, local.name);
                             }
                         }
                         else if (compilerOptions.noUnusedLocals) {
-                            ts.forEach(local.declarations, function (d) { return errorUnusedLocal(d.name || d, local.name); });
+                            ts.forEach(local.declarations, function (d) { return errorUnusedLocal(ts.getNameOfDeclaration(d) || d, local.name); });
                         }
                     }
                 });
@@ -42761,7 +42835,7 @@ var ts;
                         for (var _i = 0, _a = local.declarations; _i < _a.length; _i++) {
                             var declaration = _a[_i];
                             if (!ts.isAmbientModule(declaration)) {
-                                errorUnusedLocal(declaration.name, local.name);
+                                errorUnusedLocal(ts.getNameOfDeclaration(declaration), local.name);
                             }
                         }
                     }
@@ -42829,7 +42903,7 @@ var ts;
                 if (getNodeCheckFlags(current) & 4 /* CaptureThis */) {
                     var isDeclaration_1 = node.kind !== 71 /* Identifier */;
                     if (isDeclaration_1) {
-                        error(node.name, ts.Diagnostics.Duplicate_identifier_this_Compiler_uses_variable_declaration_this_to_capture_this_reference);
+                        error(ts.getNameOfDeclaration(node), ts.Diagnostics.Duplicate_identifier_this_Compiler_uses_variable_declaration_this_to_capture_this_reference);
                     }
                     else {
                         error(node, ts.Diagnostics.Expression_resolves_to_variable_declaration_this_that_compiler_uses_to_capture_this_reference);
@@ -42843,7 +42917,7 @@ var ts;
                 if (getNodeCheckFlags(current) & 8 /* CaptureNewTarget */) {
                     var isDeclaration_2 = node.kind !== 71 /* Identifier */;
                     if (isDeclaration_2) {
-                        error(node.name, ts.Diagnostics.Duplicate_identifier_newTarget_Compiler_uses_variable_declaration_newTarget_to_capture_new_target_meta_property_reference);
+                        error(ts.getNameOfDeclaration(node), ts.Diagnostics.Duplicate_identifier_newTarget_Compiler_uses_variable_declaration_newTarget_to_capture_new_target_meta_property_reference);
                     }
                     else {
                         error(node, ts.Diagnostics.Expression_resolves_to_variable_declaration_newTarget_that_compiler_uses_to_capture_new_target_meta_property_reference);
@@ -43109,7 +43183,7 @@ var ts;
                     checkTypeAssignableTo(checkExpressionCached(node.initializer), declarationType, node, /*headMessage*/ undefined);
                 }
                 if (!areDeclarationFlagsIdentical(node, symbol.valueDeclaration)) {
-                    error(symbol.valueDeclaration.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_modifiers, ts.declarationNameToString(node.name));
+                    error(ts.getNameOfDeclaration(symbol.valueDeclaration), ts.Diagnostics.All_declarations_of_0_must_have_identical_modifiers, ts.declarationNameToString(node.name));
                     error(node.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_modifiers, ts.declarationNameToString(node.name));
                 }
             }
@@ -43836,15 +43910,15 @@ var ts;
                 }
                 var propDeclaration = prop.valueDeclaration;
                 // index is numeric and property name is not valid numeric literal
-                if (indexKind === 1 /* Number */ && !(propDeclaration ? isNumericName(propDeclaration.name) : isNumericLiteralName(prop.name))) {
+                if (indexKind === 1 /* Number */ && !(propDeclaration ? isNumericName(ts.getNameOfDeclaration(propDeclaration)) : isNumericLiteralName(prop.name))) {
                     return;
                 }
                 // perform property check if property or indexer is declared in 'type'
-                // this allows to rule out cases when both property and indexer are inherited from the base class
+                // this allows us to rule out cases when both property and indexer are inherited from the base class
                 var errorNode;
                 if (propDeclaration &&
-                    (ts.getSpecialPropertyAssignmentKind(propDeclaration) === 4 /* ThisProperty */ ||
-                        propDeclaration.name.kind === 144 /* ComputedPropertyName */ ||
+                    (propDeclaration.kind === 194 /* BinaryExpression */ ||
+                        ts.getNameOfDeclaration(propDeclaration).kind === 144 /* ComputedPropertyName */ ||
                         prop.parent === containingType.symbol)) {
                     errorNode = propDeclaration;
                 }
@@ -44168,7 +44242,7 @@ var ts;
                         else {
                             errorMessage = ts.Diagnostics.Class_0_defines_instance_member_accessor_1_but_extended_class_2_defines_it_as_instance_member_function;
                         }
-                        error(derived.valueDeclaration.name || derived.valueDeclaration, errorMessage, typeToString(baseType), symbolToString(base), typeToString(type));
+                        error(ts.getNameOfDeclaration(derived.valueDeclaration) || derived.valueDeclaration, errorMessage, typeToString(baseType), symbolToString(base), typeToString(type));
                     }
                 }
             }
@@ -44463,7 +44537,7 @@ var ts;
                     // check that const is placed\omitted on all enum declarations
                     ts.forEach(enumSymbol.declarations, function (decl) {
                         if (ts.isConstEnumDeclaration(decl) !== enumIsConst) {
-                            error(decl.name, ts.Diagnostics.Enum_declarations_must_all_be_const_or_non_const);
+                            error(ts.getNameOfDeclaration(decl), ts.Diagnostics.Enum_declarations_must_all_be_const_or_non_const);
                         }
                     });
                 }
@@ -55839,7 +55913,7 @@ var ts;
             if (enabledSubstitutions & 2 /* BlockScopedBindings */ && !ts.isInternalName(node)) {
                 var declaration = resolver.getReferencedDeclarationWithCollidingName(node);
                 if (declaration && !(ts.isClassLike(declaration) && isPartOfClassBody(declaration, node))) {
-                    return ts.setTextRange(ts.getGeneratedNameForNode(declaration.name), node);
+                    return ts.setTextRange(ts.getGeneratedNameForNode(ts.getNameOfDeclaration(declaration)), node);
                 }
             }
             return node;
@@ -62374,7 +62448,7 @@ var ts;
         var errorNameNode;
         var emitJsDocComments = compilerOptions.removeComments ? ts.noop : writeJsDocComments;
         var emit = compilerOptions.stripInternal ? stripInternal : emitNode;
-        var noDeclare;
+        var needsDeclare = true;
         var moduleElementDeclarationEmitInfo = [];
         var asynchronousSubModuleDeclarationEmitInfo;
         // Contains the reference paths that needs to go in the declaration file.
@@ -62410,11 +62484,11 @@ var ts;
             }
             resultHasExternalModuleIndicator = false;
             if (!isBundledEmit || !ts.isExternalModule(sourceFile)) {
-                noDeclare = false;
+                needsDeclare = true;
                 emitSourceFile(sourceFile);
             }
             else if (ts.isExternalModule(sourceFile)) {
-                noDeclare = true;
+                needsDeclare = false;
                 write("declare module \"" + ts.getResolvedExternalModuleName(host, sourceFile) + "\" {");
                 writeLine();
                 increaseIndent();
@@ -62858,9 +62932,9 @@ var ts;
                 }
             }
         }
-        function emitTempVariableDeclaration(expr, baseName, diagnostic) {
+        function emitTempVariableDeclaration(expr, baseName, diagnostic, needsDeclare) {
             var tempVarName = getExportTempVariableName(baseName);
-            if (!noDeclare) {
+            if (needsDeclare) {
                 write("declare ");
             }
             write("const ");
@@ -62881,7 +62955,7 @@ var ts;
                 var tempVarName = emitTempVariableDeclaration(node.expression, "_default", {
                     diagnosticMessage: ts.Diagnostics.Default_export_of_the_module_has_or_is_using_private_name_0,
                     errorNode: node
-                });
+                }, needsDeclare);
                 write(node.isExportEquals ? "export = " : "export default ");
                 write(tempVarName);
             }
@@ -62965,7 +63039,7 @@ var ts;
                 if (modifiers & 512 /* Default */) {
                     write("default ");
                 }
-                else if (node.kind !== 230 /* InterfaceDeclaration */ && !noDeclare) {
+                else if (node.kind !== 230 /* InterfaceDeclaration */ && needsDeclare) {
                     write("declare ");
                 }
             }
@@ -63329,7 +63403,7 @@ var ts;
                     return {
                         diagnosticMessage: diagnosticMessage,
                         errorNode: node,
-                        typeName: node.parent.parent.name
+                        typeName: ts.getNameOfDeclaration(node.parent.parent)
                     };
                 }
             }
@@ -63355,7 +63429,7 @@ var ts;
                         diagnosticMessage: ts.Diagnostics.extends_clause_of_exported_class_0_has_or_is_using_private_name_1,
                         errorNode: baseTypeNode,
                         typeName: node.name
-                    });
+                    }, !ts.findAncestor(node, function (n) { return n.kind === 233 /* ModuleDeclaration */; }));
             }
             emitJsDocComments(node);
             emitModuleElementDeclarationFlags(node);
@@ -70251,7 +70325,7 @@ var ts;
                 case 153 /* GetAccessor */:
                 case 154 /* SetAccessor */:
                 case 233 /* ModuleDeclaration */:
-                    return node.parent.name === node;
+                    return ts.getNameOfDeclaration(node.parent) === node;
                 case 180 /* ElementAccessExpression */:
                     return node.parent.argumentExpression === node;
                 case 144 /* ComputedPropertyName */:
@@ -73800,7 +73874,7 @@ var ts;
                         // TODO(jfreeman): Account for computed property name
                         // NOTE: if one only performs this step when m.name is an identifier,
                         // things like '__proto__' are not filtered out.
-                        existingName = m.name.text;
+                        existingName = ts.getNameOfDeclaration(m).text;
                     }
                     existingMemberNames.set(existingName, true);
                 }
@@ -74996,8 +75070,8 @@ var ts;
             if (symbol.name !== "default") {
                 return symbol.name;
             }
-            var name = ts.forEach(symbol.declarations, function (_a) {
-                var name = _a.name;
+            var name = ts.forEach(symbol.declarations, function (decl) {
+                var name = ts.getNameOfDeclaration(decl);
                 return name && name.kind === 71 /* Identifier */ && name.text;
             });
             ts.Debug.assert(!!name);
@@ -75751,7 +75825,7 @@ var ts;
                  * position of property accessing, the referenceEntry of such position will be handled in the first case.
                  */
                 if (!(flags & 134217728 /* Transient */) && search.includes(shorthandValueSymbol)) {
-                    addReference(valueDeclaration.name, shorthandValueSymbol, search.location, state);
+                    addReference(ts.getNameOfDeclaration(valueDeclaration), shorthandValueSymbol, search.location, state);
                 }
             }
             function addReference(referenceLocation, relatedSymbol, searchLocation, state) {
@@ -76676,7 +76750,7 @@ var ts;
         }
         /** Creates a DefinitionInfo from a Declaration, using the declaration's name if possible. */
         function createDefinitionInfo(node, symbolKind, symbolName, containerName) {
-            return createDefinitionInfoFromName(node.name || node, symbolKind, symbolName, containerName);
+            return createDefinitionInfoFromName(ts.getNameOfDeclaration(node) || node, symbolKind, symbolName, containerName);
         }
         /** Creates a DefinitionInfo directly from the name of a declaration. */
         function createDefinitionInfoFromName(name, symbolKind, symbolName, containerName) {
@@ -77314,17 +77388,20 @@ var ts;
                 return undefined;
             }
             function tryAddSingleDeclarationName(declaration, containers) {
-                if (declaration && declaration.name) {
-                    var text = getTextOfIdentifierOrLiteral(declaration.name);
-                    if (text !== undefined) {
-                        containers.unshift(text);
-                    }
-                    else if (declaration.name.kind === 144 /* ComputedPropertyName */) {
-                        return tryAddComputedPropertyName(declaration.name.expression, containers, /*includeLastPortion*/ true);
-                    }
-                    else {
-                        // Don't know how to add this.
-                        return false;
+                if (declaration) {
+                    var name = ts.getNameOfDeclaration(declaration);
+                    if (name) {
+                        var text = getTextOfIdentifierOrLiteral(name);
+                        if (text !== undefined) {
+                            containers.unshift(text);
+                        }
+                        else if (name.kind === 144 /* ComputedPropertyName */) {
+                            return tryAddComputedPropertyName(name.expression, containers, /*includeLastPortion*/ true);
+                        }
+                        else {
+                            // Don't know how to add this.
+                            return false;
+                        }
                     }
                 }
                 return true;
@@ -77353,8 +77430,9 @@ var ts;
                 var containers = [];
                 // First, if we started with a computed property name, then add all but the last
                 // portion into the container array.
-                if (declaration.name.kind === 144 /* ComputedPropertyName */) {
-                    if (!tryAddComputedPropertyName(declaration.name.expression, containers, /*includeLastPortion*/ false)) {
+                var name = ts.getNameOfDeclaration(declaration);
+                if (name.kind === 144 /* ComputedPropertyName */) {
+                    if (!tryAddComputedPropertyName(name.expression, containers, /*includeLastPortion*/ false)) {
                         return undefined;
                     }
                 }
@@ -77392,6 +77470,7 @@ var ts;
             function createNavigateToItem(rawItem) {
                 var declaration = rawItem.declaration;
                 var container = ts.getContainerNode(declaration);
+                var containerName = container && ts.getNameOfDeclaration(container);
                 return {
                     name: rawItem.name,
                     kind: ts.getNodeKind(declaration),
@@ -77401,8 +77480,8 @@ var ts;
                     fileName: rawItem.fileName,
                     textSpan: ts.createTextSpanFromNode(declaration),
                     // TODO(jfreeman): What should be the containerName when the container has a computed name?
-                    containerName: container && container.name ? container.name.text : "",
-                    containerKind: container && container.name ? ts.getNodeKind(container) : ""
+                    containerName: containerName ? containerName.text : "",
+                    containerKind: containerName ? ts.getNodeKind(container) : ""
                 };
             }
         }
@@ -77654,8 +77733,8 @@ var ts;
         function mergeChildren(children) {
             var nameToItems = ts.createMap();
             ts.filterMutate(children, function (child) {
-                var decl = child.node;
-                var name = decl.name && nodeText(decl.name);
+                var declName = ts.getNameOfDeclaration(child.node);
+                var name = declName && nodeText(declName);
                 if (!name) {
                     // Anonymous items are never merged.
                     return true;
@@ -77744,9 +77823,9 @@ var ts;
             if (node.kind === 233 /* ModuleDeclaration */) {
                 return getModuleName(node);
             }
-            var decl = node;
-            if (decl.name) {
-                return ts.getPropertyNameForPropertyNameNode(decl.name);
+            var declName = ts.getNameOfDeclaration(node);
+            if (declName) {
+                return ts.getPropertyNameForPropertyNameNode(declName);
             }
             switch (node.kind) {
                 case 186 /* FunctionExpression */:
@@ -77763,7 +77842,7 @@ var ts;
             if (node.kind === 233 /* ModuleDeclaration */) {
                 return getModuleName(node);
             }
-            var name = node.name;
+            var name = ts.getNameOfDeclaration(node);
             if (name) {
                 var text = nodeText(name);
                 if (text.length > 0) {
@@ -82184,7 +82263,7 @@ var ts;
                     // falls through
                     case 149 /* PropertyDeclaration */:
                     case 146 /* Parameter */:
-                        return node.name.kind;
+                        return ts.getNameOfDeclaration(node).kind;
                 }
             }
             function getDynamicIndentation(node, nodeStartLine, indentation, delta) {
@@ -85023,7 +85102,7 @@ var ts;
             }
             var declaration = declarations[0];
             // Clone name to remove leading trivia.
-            var name = ts.getSynthesizedClone(declaration.name);
+            var name = ts.getSynthesizedClone(ts.getNameOfDeclaration(declaration));
             var visibilityModifier = createVisibilityModifier(ts.getModifierFlags(declaration));
             var modifiers = visibilityModifier ? ts.createNodeArray([visibilityModifier]) : undefined;
             var type = checker.getWidenedType(checker.getTypeOfSymbolAtLocation(symbol, enclosingDeclaration));
@@ -85584,13 +85663,14 @@ var ts;
                 return declarations;
             }
             function getDeclarationName(declaration) {
-                if (declaration.name) {
-                    var result_7 = getTextOfIdentifierOrLiteral(declaration.name);
+                var name = ts.getNameOfDeclaration(declaration);
+                if (name) {
+                    var result_7 = getTextOfIdentifierOrLiteral(name);
                     if (result_7 !== undefined) {
                         return result_7;
                     }
-                    if (declaration.name.kind === 144 /* ComputedPropertyName */) {
-                        var expr = declaration.name.expression;
+                    if (name.kind === 144 /* ComputedPropertyName */) {
+                        var expr = name.expression;
                         if (expr.kind === 179 /* PropertyAccessExpression */) {
                             return expr.name.text;
                         }
@@ -88143,6 +88223,9 @@ var ts;
                 var compilerOptions = JSON.parse(compilerOptionsJson);
                 var result = ts.resolveModuleName(moduleName, ts.normalizeSlashes(fileName), compilerOptions, _this.host);
                 var resolvedFileName = result.resolvedModule ? result.resolvedModule.resolvedFileName : undefined;
+                if (result.resolvedModule && result.resolvedModule.extension !== ts.Extension.Ts && result.resolvedModule.extension !== ts.Extension.Tsx && result.resolvedModule.extension !== ts.Extension.Dts) {
+                    resolvedFileName = undefined;
+                }
                 return {
                     resolvedFileName: resolvedFileName,
                     failedLookupLocations: result.failedLookupLocations

lib/typescriptServices.d.ts

@@ -491,9 +491,11 @@ declare namespace ts {
     type DeclarationName = Identifier | StringLiteral | NumericLiteral | ComputedPropertyName | BindingPattern;
     interface Declaration extends Node {
         _declarationBrand: any;
+    }
+    interface NamedDeclaration extends Declaration {
         name?: DeclarationName;
     }
-    interface DeclarationStatement extends Declaration, Statement {
+    interface DeclarationStatement extends NamedDeclaration, Statement {
         name?: Identifier | StringLiteral | NumericLiteral;
     }
     interface ComputedPropertyName extends Node {
@@ -504,7 +506,7 @@ declare namespace ts {
         kind: SyntaxKind.Decorator;
         expression: LeftHandSideExpression;
     }
-    interface TypeParameterDeclaration extends Declaration {
+    interface TypeParameterDeclaration extends NamedDeclaration {
         kind: SyntaxKind.TypeParameter;
         parent?: DeclarationWithTypeParameters;
         name: Identifier;
@@ -512,7 +514,7 @@ declare namespace ts {
         default?: TypeNode;
         expression?: Expression;
     }
-    interface SignatureDeclaration extends Declaration {
+    interface SignatureDeclaration extends NamedDeclaration {
         name?: PropertyName;
         typeParameters?: NodeArray<TypeParameterDeclaration>;
         parameters: NodeArray<ParameterDeclaration>;
@@ -525,7 +527,7 @@ declare namespace ts {
         kind: SyntaxKind.ConstructSignature;
     }
     type BindingName = Identifier | BindingPattern;
-    interface VariableDeclaration extends Declaration {
+    interface VariableDeclaration extends NamedDeclaration {
         kind: SyntaxKind.VariableDeclaration;
         parent?: VariableDeclarationList | CatchClause;
         name: BindingName;
@@ -537,7 +539,7 @@ declare namespace ts {
         parent?: VariableStatement | ForStatement | ForOfStatement | ForInStatement;
         declarations: NodeArray<VariableDeclaration>;
     }
-    interface ParameterDeclaration extends Declaration {
+    interface ParameterDeclaration extends NamedDeclaration {
         kind: SyntaxKind.Parameter;
         parent?: SignatureDeclaration;
         dotDotDotToken?: DotDotDotToken;
@@ -546,7 +548,7 @@ declare namespace ts {
         type?: TypeNode;
         initializer?: Expression;
     }
-    interface BindingElement extends Declaration {
+    interface BindingElement extends NamedDeclaration {
         kind: SyntaxKind.BindingElement;
         parent?: BindingPattern;
         propertyName?: PropertyName;
@@ -568,7 +570,7 @@ declare namespace ts {
         type?: TypeNode;
         initializer?: Expression;
     }
-    interface ObjectLiteralElement extends Declaration {
+    interface ObjectLiteralElement extends NamedDeclaration {
         _objectLiteralBrandBrand: any;
         name?: PropertyName;
     }
@@ -590,7 +592,7 @@ declare namespace ts {
         kind: SyntaxKind.SpreadAssignment;
         expression: Expression;
     }
-    interface VariableLikeDeclaration extends Declaration {
+    interface VariableLikeDeclaration extends NamedDeclaration {
         propertyName?: PropertyName;
         dotDotDotToken?: DotDotDotToken;
         name: DeclarationName;
@@ -598,7 +600,7 @@ declare namespace ts {
         type?: TypeNode;
         initializer?: Expression;
     }
-    interface PropertyLikeDeclaration extends Declaration {
+    interface PropertyLikeDeclaration extends NamedDeclaration {
         name: PropertyName;
     }
     interface ObjectBindingPattern extends Node {
@@ -950,7 +952,7 @@ declare namespace ts {
     }
     type EntityNameExpression = Identifier | PropertyAccessEntityNameExpression | ParenthesizedExpression;
     type EntityNameOrEntityNameExpression = EntityName | EntityNameExpression;
-    interface PropertyAccessExpression extends MemberExpression, Declaration {
+    interface PropertyAccessExpression extends MemberExpression, NamedDeclaration {
         kind: SyntaxKind.PropertyAccessExpression;
         expression: LeftHandSideExpression;
         name: Identifier;
@@ -1197,7 +1199,7 @@ declare namespace ts {
         block: Block;
     }
     type DeclarationWithTypeParameters = SignatureDeclaration | ClassLikeDeclaration | InterfaceDeclaration | TypeAliasDeclaration;
-    interface ClassLikeDeclaration extends Declaration {
+    interface ClassLikeDeclaration extends NamedDeclaration {
         name?: Identifier;
         typeParameters?: NodeArray<TypeParameterDeclaration>;
         heritageClauses?: NodeArray<HeritageClause>;
@@ -1210,11 +1212,11 @@ declare namespace ts {
     interface ClassExpression extends ClassLikeDeclaration, PrimaryExpression {
         kind: SyntaxKind.ClassExpression;
     }
-    interface ClassElement extends Declaration {
+    interface ClassElement extends NamedDeclaration {
         _classElementBrand: any;
         name?: PropertyName;
     }
-    interface TypeElement extends Declaration {
+    interface TypeElement extends NamedDeclaration {
         _typeElementBrand: any;
         name?: PropertyName;
         questionToken?: QuestionToken;
@@ -1238,7 +1240,7 @@ declare namespace ts {
         typeParameters?: NodeArray<TypeParameterDeclaration>;
         type: TypeNode;
     }
-    interface EnumMember extends Declaration {
+    interface EnumMember extends NamedDeclaration {
         kind: SyntaxKind.EnumMember;
         parent?: EnumDeclaration;
         name: PropertyName;
@@ -1297,13 +1299,13 @@ declare namespace ts {
         moduleSpecifier: Expression;
     }
     type NamedImportBindings = NamespaceImport | NamedImports;
-    interface ImportClause extends Declaration {
+    interface ImportClause extends NamedDeclaration {
         kind: SyntaxKind.ImportClause;
         parent?: ImportDeclaration;
         name?: Identifier;
         namedBindings?: NamedImportBindings;
     }
-    interface NamespaceImport extends Declaration {
+    interface NamespaceImport extends NamedDeclaration {
         kind: SyntaxKind.NamespaceImport;
         parent?: ImportClause;
         name: Identifier;
@@ -1330,13 +1332,13 @@ declare namespace ts {
         elements: NodeArray<ExportSpecifier>;
     }
     type NamedImportsOrExports = NamedImports | NamedExports;
-    interface ImportSpecifier extends Declaration {
+    interface ImportSpecifier extends NamedDeclaration {
         kind: SyntaxKind.ImportSpecifier;
         parent?: NamedImports;
         propertyName?: Identifier;
         name: Identifier;
     }
-    interface ExportSpecifier extends Declaration {
+    interface ExportSpecifier extends NamedDeclaration {
         kind: SyntaxKind.ExportSpecifier;
         parent?: NamedExports;
         propertyName?: Identifier;
@@ -1467,7 +1469,7 @@ declare namespace ts {
         kind: SyntaxKind.JSDocTypeTag;
         typeExpression: JSDocTypeExpression;
     }
-    interface JSDocTypedefTag extends JSDocTag, Declaration {
+    interface JSDocTypedefTag extends JSDocTag, NamedDeclaration {
         kind: SyntaxKind.JSDocTypedefTag;
         fullName?: JSDocNamespaceDeclaration | Identifier;
         name?: Identifier;

lib/typescriptServices.js

@@ -8249,6 +8249,36 @@ var ts;
         return false;
     }
     ts.isDeclarationName = isDeclarationName;
+    function getNameOfDeclaration(declaration) {
+        if (!declaration) {
+            return undefined;
+        }
+        if (declaration.kind === 194 /* BinaryExpression */) {
+            var kind = getSpecialPropertyAssignmentKind(declaration);
+            var lhs = declaration.left;
+            switch (kind) {
+                case 0 /* None */:
+                case 2 /* ModuleExports */:
+                    return undefined;
+                case 1 /* ExportsProperty */:
+                    if (lhs.kind === 71 /* Identifier */) {
+                        return lhs.name;
+                    }
+                    else {
+                        return lhs.expression.name;
+                    }
+                case 4 /* ThisProperty */:
+                case 5 /* Property */:
+                    return lhs.name;
+                case 3 /* PrototypeProperty */:
+                    return lhs.expression.name;
+            }
+        }
+        else {
+            return declaration.name;
+        }
+    }
+    ts.getNameOfDeclaration = getNameOfDeclaration;
     function isLiteralComputedPropertyDeclarationName(node) {
         return (node.kind === 9 /* StringLiteral */ || node.kind === 8 /* NumericLiteral */) &&
             node.parent.kind === 144 /* ComputedPropertyName */ &&
@@ -8462,7 +8492,8 @@ var ts;
      *      Symbol.
      */
     function hasDynamicName(declaration) {
-        return declaration.name && isDynamicName(declaration.name);
+        var name = getNameOfDeclaration(declaration);
+        return name && isDynamicName(name);
     }
     ts.hasDynamicName = hasDynamicName;
     function isDynamicName(name) {
@@ -13679,9 +13710,10 @@ var ts;
     }
     ts.getDeclarationName = getDeclarationName;
     function getName(node, allowComments, allowSourceMaps, emitFlags) {
-        if (node.name && ts.isIdentifier(node.name) && !ts.isGeneratedIdentifier(node.name)) {
-            var name = ts.getMutableClone(node.name);
-            emitFlags |= ts.getEmitFlags(node.name);
+        var nodeName = ts.getNameOfDeclaration(node);
+        if (nodeName && ts.isIdentifier(nodeName) && !ts.isGeneratedIdentifier(nodeName)) {
+            var name = ts.getMutableClone(nodeName);
+            emitFlags |= ts.getEmitFlags(nodeName);
             if (!allowSourceMaps)
                 emitFlags |= 48 /* NoSourceMap */;
             if (!allowComments)
@@ -21510,12 +21542,13 @@ var ts;
         // Should not be called on a declaration with a computed property name,
         // unless it is a well known Symbol.
         function getDeclarationName(node) {
-            if (node.name) {
+            var name = ts.getNameOfDeclaration(node);
+            if (name) {
                 if (ts.isAmbientModule(node)) {
-                    return ts.isGlobalScopeAugmentation(node) ? "__global" : "\"" + node.name.text + "\"";
+                    return ts.isGlobalScopeAugmentation(node) ? "__global" : "\"" + name.text + "\"";
                 }
-                if (node.name.kind === 144 /* ComputedPropertyName */) {
-                    var nameExpression = node.name.expression;
+                if (name.kind === 144 /* ComputedPropertyName */) {
+                    var nameExpression = name.expression;
                     // treat computed property names where expression is string/numeric literal as just string/numeric literal
                     if (ts.isStringOrNumericLiteral(nameExpression)) {
                         return nameExpression.text;
@@ -21523,7 +21556,7 @@ var ts;
                     ts.Debug.assert(ts.isWellKnownSymbolSyntactically(nameExpression));
                     return ts.getPropertyNameForKnownSymbolName(nameExpression.name.text);
                 }
-                return node.name.text;
+                return name.text;
             }
             switch (node.kind) {
                 case 152 /* Constructor */:
@@ -21667,9 +21700,9 @@ var ts;
                             }
                         }
                         ts.forEach(symbol.declarations, function (declaration) {
-                            file.bindDiagnostics.push(ts.createDiagnosticForNode(declaration.name || declaration, message_1, getDisplayName(declaration)));
+                            file.bindDiagnostics.push(ts.createDiagnosticForNode(ts.getNameOfDeclaration(declaration) || declaration, message_1, getDisplayName(declaration)));
                         });
-                        file.bindDiagnostics.push(ts.createDiagnosticForNode(node.name || node, message_1, getDisplayName(node)));
+                        file.bindDiagnostics.push(ts.createDiagnosticForNode(ts.getNameOfDeclaration(node) || node, message_1, getDisplayName(node)));
                         symbol = createSymbol(0 /* None */, name);
                     }
                 }
@@ -25965,16 +25998,16 @@ var ts;
                 recordMergedSymbol(target, source);
             }
             else if (target.flags & 1024 /* NamespaceModule */) {
-                error(source.declarations[0].name, ts.Diagnostics.Cannot_augment_module_0_with_value_exports_because_it_resolves_to_a_non_module_entity, symbolToString(target));
+                error(ts.getNameOfDeclaration(source.declarations[0]), ts.Diagnostics.Cannot_augment_module_0_with_value_exports_because_it_resolves_to_a_non_module_entity, symbolToString(target));
             }
             else {
                 var message_2 = target.flags & 2 /* BlockScopedVariable */ || source.flags & 2 /* BlockScopedVariable */
                     ? ts.Diagnostics.Cannot_redeclare_block_scoped_variable_0 : ts.Diagnostics.Duplicate_identifier_0;
                 ts.forEach(source.declarations, function (node) {
-                    error(node.name ? node.name : node, message_2, symbolToString(source));
+                    error(ts.getNameOfDeclaration(node) || node, message_2, symbolToString(source));
                 });
                 ts.forEach(target.declarations, function (node) {
-                    error(node.name ? node.name : node, message_2, symbolToString(source));
+                    error(ts.getNameOfDeclaration(node) || node, message_2, symbolToString(source));
                 });
             }
         }
@@ -26102,7 +26135,8 @@ var ts;
             var useFile = ts.getSourceFileOfNode(usage);
             if (declarationFile !== useFile) {
                 if ((modulekind && (declarationFile.externalModuleIndicator || useFile.externalModuleIndicator)) ||
-                    (!compilerOptions.outFile && !compilerOptions.out)) {
+                    (!compilerOptions.outFile && !compilerOptions.out) ||
+                    ts.isInAmbientContext(declaration)) {
                     // nodes are in different files and order cannot be determined
                     return true;
                 }
@@ -26566,13 +26600,13 @@ var ts;
             ts.Debug.assert(declaration !== undefined, "Declaration to checkResolvedBlockScopedVariable is undefined");
             if (!ts.isInAmbientContext(declaration) && !isBlockScopedNameDeclaredBeforeUse(declaration, errorLocation)) {
                 if (result.flags & 2 /* BlockScopedVariable */) {
-                    error(errorLocation, ts.Diagnostics.Block_scoped_variable_0_used_before_its_declaration, ts.declarationNameToString(declaration.name));
+                    error(errorLocation, ts.Diagnostics.Block_scoped_variable_0_used_before_its_declaration, ts.declarationNameToString(ts.getNameOfDeclaration(declaration)));
                 }
                 else if (result.flags & 32 /* Class */) {
-                    error(errorLocation, ts.Diagnostics.Class_0_used_before_its_declaration, ts.declarationNameToString(declaration.name));
+                    error(errorLocation, ts.Diagnostics.Class_0_used_before_its_declaration, ts.declarationNameToString(ts.getNameOfDeclaration(declaration)));
                 }
                 else if (result.flags & 384 /* Enum */) {
-                    error(errorLocation, ts.Diagnostics.Enum_0_used_before_its_declaration, ts.declarationNameToString(declaration.name));
+                    error(errorLocation, ts.Diagnostics.Enum_0_used_before_its_declaration, ts.declarationNameToString(ts.getNameOfDeclaration(declaration)));
                 }
             }
         }
@@ -27948,8 +27982,9 @@ var ts;
                 function getNameOfSymbol(symbol) {
                     var declaration = ts.firstOrUndefined(symbol.declarations);
                     if (declaration) {
-                        if (declaration.name) {
-                            return ts.declarationNameToString(declaration.name);
+                        var name = ts.getNameOfDeclaration(declaration);
+                        if (name) {
+                            return ts.declarationNameToString(name);
                         }
                         if (declaration.parent && declaration.parent.kind === 226 /* VariableDeclaration */) {
                             return ts.declarationNameToString(declaration.parent.name);
@@ -28030,8 +28065,9 @@ var ts;
         function getNameOfSymbol(symbol) {
             if (symbol.declarations && symbol.declarations.length) {
                 var declaration = symbol.declarations[0];
-                if (declaration.name) {
-                    return ts.declarationNameToString(declaration.name);
+                var name = ts.getNameOfDeclaration(declaration);
+                if (name) {
+                    return ts.declarationNameToString(name);
                 }
                 if (declaration.parent && declaration.parent.kind === 226 /* VariableDeclaration */) {
                     return ts.declarationNameToString(declaration.parent.name);
@@ -31222,8 +31258,9 @@ var ts;
                     type = anyType;
                     if (noImplicitAny) {
                         var declaration = signature.declaration;
-                        if (declaration.name) {
-                            error(declaration.name, ts.Diagnostics._0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions, ts.declarationNameToString(declaration.name));
+                        var name = ts.getNameOfDeclaration(declaration);
+                        if (name) {
+                            error(name, ts.Diagnostics._0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions, ts.declarationNameToString(name));
                         }
                         else {
                             error(declaration, ts.Diagnostics.Function_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions);
@@ -33350,29 +33387,6 @@ var ts;
                 }
                 return 0 /* False */;
             }
-            // Check if a property with the given name is known anywhere in the given type. In an object type, a property
-            // is considered known if the object type is empty and the check is for assignability, if the object type has
-            // index signatures, or if the property is actually declared in the object type. In a union or intersection
-            // type, a property is considered known if it is known in any constituent type.
-            function isKnownProperty(type, name, isComparingJsxAttributes) {
-                if (type.flags & 32768 /* Object */) {
-                    var resolved = resolveStructuredTypeMembers(type);
-                    if (resolved.stringIndexInfo || resolved.numberIndexInfo && isNumericLiteralName(name) ||
-                        getPropertyOfType(type, name) || isComparingJsxAttributes && !isUnhyphenatedJsxName(name)) {
-                        // For JSXAttributes, if the attribute has a hyphenated name, consider that the attribute to be known.
-                        return true;
-                    }
-                }
-                else if (type.flags & 196608 /* UnionOrIntersection */) {
-                    for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
-                        var t = _a[_i];
-                        if (isKnownProperty(t, name, isComparingJsxAttributes)) {
-                            return true;
-                        }
-                    }
-                }
-                return false;
-            }
             function hasExcessProperties(source, target, reportErrors) {
                 if (maybeTypeOfKind(target, 32768 /* Object */) && !(getObjectFlags(target) & 512 /* ObjectLiteralPatternWithComputedProperties */)) {
                     var isComparingJsxAttributes = !!(source.flags & 33554432 /* JsxAttributes */);
@@ -34523,7 +34537,7 @@ var ts;
                 default:
                     diagnostic = ts.Diagnostics.Variable_0_implicitly_has_an_1_type;
             }
-            error(declaration, diagnostic, ts.declarationNameToString(declaration.name), typeAsString);
+            error(declaration, diagnostic, ts.declarationNameToString(ts.getNameOfDeclaration(declaration)), typeAsString);
         }
         function reportErrorsFromWidening(declaration, type) {
             if (produceDiagnostics && noImplicitAny && type.flags & 2097152 /* ContainsWideningType */) {
@@ -36303,7 +36317,7 @@ var ts;
             if (type === autoType || type === autoArrayType) {
                 if (flowType === autoType || flowType === autoArrayType) {
                     if (noImplicitAny) {
-                        error(declaration.name, ts.Diagnostics.Variable_0_implicitly_has_type_1_in_some_locations_where_its_type_cannot_be_determined, symbolToString(symbol), typeToString(flowType));
+                        error(ts.getNameOfDeclaration(declaration), ts.Diagnostics.Variable_0_implicitly_has_type_1_in_some_locations_where_its_type_cannot_be_determined, symbolToString(symbol), typeToString(flowType));
                         error(node, ts.Diagnostics.Variable_0_implicitly_has_an_1_type, symbolToString(symbol), typeToString(flowType));
                     }
                     return convertAutoToAny(flowType);
@@ -37581,6 +37595,8 @@ var ts;
             var spread = emptyObjectType;
             var attributesArray = [];
             var hasSpreadAnyType = false;
+            var explicitlySpecifyChildrenAttribute = false;
+            var jsxChildrenPropertyName = getJsxElementChildrenPropertyname();
             for (var _i = 0, _a = attributes.properties; _i < _a.length; _i++) {
                 var attributeDecl = _a[_i];
                 var member = attributeDecl.symbol;
@@ -37598,6 +37614,9 @@ var ts;
                     attributeSymbol.target = member;
                     attributesTable.set(attributeSymbol.name, attributeSymbol);
                     attributesArray.push(attributeSymbol);
+                    if (attributeDecl.name.text === jsxChildrenPropertyName) {
+                        explicitlySpecifyChildrenAttribute = true;
+                    }
                 }
                 else {
                     ts.Debug.assert(attributeDecl.kind === 255 /* JsxSpreadAttribute */);
@@ -37606,11 +37625,7 @@ var ts;
                         attributesArray = [];
                         attributesTable = ts.createMap();
                     }
-                    var exprType = checkExpression(attributeDecl.expression);
-                    if (!isValidSpreadType(exprType)) {
-                        error(attributeDecl, ts.Diagnostics.Spread_types_may_only_be_created_from_object_types);
-                        hasSpreadAnyType = true;
-                    }
+                    var exprType = getApparentType(checkExpression(attributeDecl.expression));
                     if (isTypeAny(exprType)) {
                         hasSpreadAnyType = true;
                     }
@@ -37653,11 +37668,11 @@ var ts;
                         childrenTypes.push(checkExpression(child, checkMode));
                     }
                 }
-                // Error if there is a attribute named "children" and children element.
-                // This is because children element will overwrite the value from attributes
-                var jsxChildrenPropertyName = getJsxElementChildrenPropertyname();
                 if (!hasSpreadAnyType && jsxChildrenPropertyName && jsxChildrenPropertyName !== "") {
-                    if (attributesTable.has(jsxChildrenPropertyName)) {
+                    // Error if there is a attribute named "children" explicitly specified and children element.
+                    // This is because children element will overwrite the value from attributes.
+                    // Note: we will not warn "children" attribute overwritten if "children" attribute is specified in object spread.
+                    if (explicitlySpecifyChildrenAttribute) {
                         error(attributes, ts.Diagnostics._0_are_specified_twice_The_attribute_named_0_will_be_overwritten, jsxChildrenPropertyName);
                     }
                     // If there are children in the body of JSX element, create dummy attribute "children" with anyType so that it will pass the attribute checking process
@@ -37676,8 +37691,7 @@ var ts;
              */
             function createJsxAttributesType(symbol, attributesTable) {
                 var result = createAnonymousType(symbol, attributesTable, emptyArray, emptyArray, /*stringIndexInfo*/ undefined, /*numberIndexInfo*/ undefined);
-                var freshObjectLiteralFlag = compilerOptions.suppressExcessPropertyErrors ? 0 : 1048576 /* FreshLiteral */;
-                result.flags |= 33554432 /* JsxAttributes */ | 4194304 /* ContainsObjectLiteral */ | freshObjectLiteralFlag;
+                result.flags |= 33554432 /* JsxAttributes */ | 4194304 /* ContainsObjectLiteral */;
                 result.objectFlags |= 128 /* ObjectLiteral */;
                 return result;
             }
@@ -37818,6 +37832,20 @@ var ts;
             }
             return _jsxElementChildrenPropertyName;
         }
+        function getApparentTypeOfJsxPropsType(propsType) {
+            if (!propsType) {
+                return undefined;
+            }
+            if (propsType.flags & 131072 /* Intersection */) {
+                var propsApparentType = [];
+                for (var _i = 0, _a = propsType.types; _i < _a.length; _i++) {
+                    var t = _a[_i];
+                    propsApparentType.push(getApparentType(t));
+                }
+                return getIntersectionType(propsApparentType);
+            }
+            return getApparentType(propsType);
+        }
         /**
          * Get JSX attributes type by trying to resolve openingLikeElement as a stateless function component.
          * Return only attributes type of successfully resolved call signature.
@@ -37838,6 +37866,7 @@ var ts;
                     if (callSignature !== unknownSignature) {
                         var callReturnType = callSignature && getReturnTypeOfSignature(callSignature);
                         var paramType = callReturnType && (callSignature.parameters.length === 0 ? emptyObjectType : getTypeOfSymbol(callSignature.parameters[0]));
+                        paramType = getApparentTypeOfJsxPropsType(paramType);
                         if (callReturnType && isTypeAssignableTo(callReturnType, jsxStatelessElementType)) {
                             // Intersect in JSX.IntrinsicAttributes if it exists
                             var intrinsicAttributes = getJsxType(JsxNames.IntrinsicAttributes);
@@ -37876,6 +37905,7 @@ var ts;
                         var candidate = candidatesOutArray_1[_i];
                         var callReturnType = getReturnTypeOfSignature(candidate);
                         var paramType = callReturnType && (candidate.parameters.length === 0 ? emptyObjectType : getTypeOfSymbol(candidate.parameters[0]));
+                        paramType = getApparentTypeOfJsxPropsType(paramType);
                         if (callReturnType && isTypeAssignableTo(callReturnType, jsxStatelessElementType)) {
                             var shouldBeCandidate = true;
                             for (var _a = 0, _b = openingLikeElement.attributes.properties; _a < _b.length; _a++) {
@@ -38150,6 +38180,34 @@ var ts;
             }
             checkJsxAttributesAssignableToTagNameAttributes(node);
         }
+        /**
+         * Check if a property with the given name is known anywhere in the given type. In an object type, a property
+         * is considered known if the object type is empty and the check is for assignability, if the object type has
+         * index signatures, or if the property is actually declared in the object type. In a union or intersection
+         * type, a property is considered known if it is known in any constituent type.
+         * @param targetType a type to search a given name in
+         * @param name a property name to search
+         * @param isComparingJsxAttributes a boolean flag indicating whether we are searching in JsxAttributesType
+         */
+        function isKnownProperty(targetType, name, isComparingJsxAttributes) {
+            if (targetType.flags & 32768 /* Object */) {
+                var resolved = resolveStructuredTypeMembers(targetType);
+                if (resolved.stringIndexInfo || resolved.numberIndexInfo && isNumericLiteralName(name) ||
+                    getPropertyOfType(targetType, name) || isComparingJsxAttributes && !isUnhyphenatedJsxName(name)) {
+                    // For JSXAttributes, if the attribute has a hyphenated name, consider that the attribute to be known.
+                    return true;
+                }
+            }
+            else if (targetType.flags & 196608 /* UnionOrIntersection */) {
+                for (var _i = 0, _a = targetType.types; _i < _a.length; _i++) {
+                    var t = _a[_i];
+                    if (isKnownProperty(t, name, isComparingJsxAttributes)) {
+                        return true;
+                    }
+                }
+            }
+            return false;
+        }
         /**
          * Check whether the given attributes of JSX opening-like element is assignable to the tagName attributes.
          *      Get the attributes type of the opening-like element through resolving the tagName, "target attributes"
@@ -38178,7 +38236,20 @@ var ts;
                 error(openingLikeElement, ts.Diagnostics.JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property, getJsxElementPropertiesName());
             }
             else {
-                checkTypeAssignableTo(sourceAttributesType, targetAttributesType, openingLikeElement.attributes.properties.length > 0 ? openingLikeElement.attributes : openingLikeElement);
+                // Check if sourceAttributesType assignable to targetAttributesType though this check will allow excess properties
+                var isSourceAttributeTypeAssignableToTarget = checkTypeAssignableTo(sourceAttributesType, targetAttributesType, openingLikeElement.attributes.properties.length > 0 ? openingLikeElement.attributes : openingLikeElement);
+                // After we check for assignability, we will do another pass to check that all explicitly specified attributes have correct name corresponding in targetAttributeType.
+                // This will allow excess properties in spread type as it is very common pattern to spread outter attributes into React component in its render method.
+                if (isSourceAttributeTypeAssignableToTarget && !isTypeAny(sourceAttributesType) && !isTypeAny(targetAttributesType)) {
+                    for (var _i = 0, _a = openingLikeElement.attributes.properties; _i < _a.length; _i++) {
+                        var attribute = _a[_i];
+                        if (ts.isJsxAttribute(attribute) && !isKnownProperty(targetAttributesType, attribute.name.text, /*isComparingJsxAttributes*/ true)) {
+                            error(attribute, ts.Diagnostics.Property_0_does_not_exist_on_type_1, attribute.name.text, typeToString(targetAttributesType));
+                            // We break here so that errors won't be cascading
+                            break;
+                        }
+                    }
+                }
             }
         }
         function checkJsxExpression(node, checkMode) {
@@ -39507,7 +39578,7 @@ var ts;
             // only the class declaration node will have the Abstract flag set.
             var valueDecl = expressionType.symbol && getClassLikeDeclarationOfSymbol(expressionType.symbol);
             if (valueDecl && ts.getModifierFlags(valueDecl) & 128 /* Abstract */) {
-                error(node, ts.Diagnostics.Cannot_create_an_instance_of_the_abstract_class_0, ts.declarationNameToString(valueDecl.name));
+                error(node, ts.Diagnostics.Cannot_create_an_instance_of_the_abstract_class_0, ts.declarationNameToString(ts.getNameOfDeclaration(valueDecl)));
                 return resolveErrorCall(node);
             }
             // TS 1.0 spec: 4.11
@@ -39918,11 +39989,11 @@ var ts;
             var links = getSymbolLinks(parameter);
             if (!links.type) {
                 links.type = instantiateType(contextualType, mapper);
+                var name = ts.getNameOfDeclaration(parameter.valueDeclaration);
                 // if inference didn't come up with anything but {}, fall back to the binding pattern if present.
                 if (links.type === emptyObjectType &&
-                    (parameter.valueDeclaration.name.kind === 174 /* ObjectBindingPattern */ ||
-                        parameter.valueDeclaration.name.kind === 175 /* ArrayBindingPattern */)) {
-                    links.type = getTypeFromBindingPattern(parameter.valueDeclaration.name);
+                    (name.kind === 174 /* ObjectBindingPattern */ || name.kind === 175 /* ArrayBindingPattern */)) {
+                    links.type = getTypeFromBindingPattern(name);
                 }
                 assignBindingElementTypes(parameter.valueDeclaration);
             }
@@ -41597,7 +41668,7 @@ var ts;
                             continue;
                     }
                     if (names.get(memberName)) {
-                        error(member.symbol.valueDeclaration.name, ts.Diagnostics.Duplicate_identifier_0, memberName);
+                        error(ts.getNameOfDeclaration(member.symbol.valueDeclaration), ts.Diagnostics.Duplicate_identifier_0, memberName);
                         error(member.name, ts.Diagnostics.Duplicate_identifier_0, memberName);
                     }
                     else {
@@ -41685,7 +41756,8 @@ var ts;
                 return;
             }
             function containsSuperCallAsComputedPropertyName(n) {
-                return n.name && containsSuperCall(n.name);
+                var name = ts.getNameOfDeclaration(n);
+                return name && containsSuperCall(name);
             }
             function containsSuperCall(n) {
                 if (ts.isSuperCall(n)) {
@@ -41945,16 +42017,16 @@ var ts;
                     ts.forEach(overloads, function (o) {
                         var deviation = getEffectiveDeclarationFlags(o, flagsToCheck) ^ canonicalFlags_1;
                         if (deviation & 1 /* Export */) {
-                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_exported_or_non_exported);
+                            error(ts.getNameOfDeclaration(o), ts.Diagnostics.Overload_signatures_must_all_be_exported_or_non_exported);
                         }
                         else if (deviation & 2 /* Ambient */) {
-                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_ambient_or_non_ambient);
+                            error(ts.getNameOfDeclaration(o), ts.Diagnostics.Overload_signatures_must_all_be_ambient_or_non_ambient);
                         }
                         else if (deviation & (8 /* Private */ | 16 /* Protected */)) {
-                            error(o.name || o, ts.Diagnostics.Overload_signatures_must_all_be_public_private_or_protected);
+                            error(ts.getNameOfDeclaration(o) || o, ts.Diagnostics.Overload_signatures_must_all_be_public_private_or_protected);
                         }
                         else if (deviation & 128 /* Abstract */) {
-                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_abstract_or_non_abstract);
+                            error(ts.getNameOfDeclaration(o), ts.Diagnostics.Overload_signatures_must_all_be_abstract_or_non_abstract);
                         }
                     });
                 }
@@ -41965,7 +42037,7 @@ var ts;
                     ts.forEach(overloads, function (o) {
                         var deviation = ts.hasQuestionToken(o) !== canonicalHasQuestionToken_1;
                         if (deviation) {
-                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_optional_or_required);
+                            error(ts.getNameOfDeclaration(o), ts.Diagnostics.Overload_signatures_must_all_be_optional_or_required);
                         }
                     });
                 }
@@ -42089,7 +42161,7 @@ var ts;
             }
             if (duplicateFunctionDeclaration) {
                 ts.forEach(declarations, function (declaration) {
-                    error(declaration.name, ts.Diagnostics.Duplicate_function_implementation);
+                    error(ts.getNameOfDeclaration(declaration), ts.Diagnostics.Duplicate_function_implementation);
                 });
             }
             // Abstract methods can't have an implementation -- in particular, they don't need one.
@@ -42162,12 +42234,13 @@ var ts;
                 for (var _b = 0, _c = symbol.declarations; _b < _c.length; _b++) {
                     var d = _c[_b];
                     var declarationSpaces = getDeclarationSpaces(d);
+                    var name = ts.getNameOfDeclaration(d);
                     // Only error on the declarations that contributed to the intersecting spaces.
                     if (declarationSpaces & commonDeclarationSpacesForDefaultAndNonDefault) {
-                        error(d.name, ts.Diagnostics.Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_default_0_declaration_instead, ts.declarationNameToString(d.name));
+                        error(name, ts.Diagnostics.Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_default_0_declaration_instead, ts.declarationNameToString(name));
                     }
                     else if (declarationSpaces & commonDeclarationSpacesForExportsAndLocals) {
-                        error(d.name, ts.Diagnostics.Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local, ts.declarationNameToString(d.name));
+                        error(name, ts.Diagnostics.Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local, ts.declarationNameToString(name));
                     }
                 }
             }
@@ -42673,15 +42746,16 @@ var ts;
                     if (!local.isReferenced) {
                         if (local.valueDeclaration && ts.getRootDeclaration(local.valueDeclaration).kind === 146 /* Parameter */) {
                             var parameter = ts.getRootDeclaration(local.valueDeclaration);
+                            var name = ts.getNameOfDeclaration(local.valueDeclaration);
                             if (compilerOptions.noUnusedParameters &&
                                 !ts.isParameterPropertyDeclaration(parameter) &&
                                 !ts.parameterIsThisKeyword(parameter) &&
-                                !parameterNameStartsWithUnderscore(local.valueDeclaration.name)) {
-                                error(local.valueDeclaration.name, ts.Diagnostics._0_is_declared_but_never_used, local.name);
+                                !parameterNameStartsWithUnderscore(name)) {
+                                error(name, ts.Diagnostics._0_is_declared_but_never_used, local.name);
                             }
                         }
                         else if (compilerOptions.noUnusedLocals) {
-                            ts.forEach(local.declarations, function (d) { return errorUnusedLocal(d.name || d, local.name); });
+                            ts.forEach(local.declarations, function (d) { return errorUnusedLocal(ts.getNameOfDeclaration(d) || d, local.name); });
                         }
                     }
                 });
@@ -42761,7 +42835,7 @@ var ts;
                         for (var _i = 0, _a = local.declarations; _i < _a.length; _i++) {
                             var declaration = _a[_i];
                             if (!ts.isAmbientModule(declaration)) {
-                                errorUnusedLocal(declaration.name, local.name);
+                                errorUnusedLocal(ts.getNameOfDeclaration(declaration), local.name);
                             }
                         }
                     }
@@ -42829,7 +42903,7 @@ var ts;
                 if (getNodeCheckFlags(current) & 4 /* CaptureThis */) {
                     var isDeclaration_1 = node.kind !== 71 /* Identifier */;
                     if (isDeclaration_1) {
-                        error(node.name, ts.Diagnostics.Duplicate_identifier_this_Compiler_uses_variable_declaration_this_to_capture_this_reference);
+                        error(ts.getNameOfDeclaration(node), ts.Diagnostics.Duplicate_identifier_this_Compiler_uses_variable_declaration_this_to_capture_this_reference);
                     }
                     else {
                         error(node, ts.Diagnostics.Expression_resolves_to_variable_declaration_this_that_compiler_uses_to_capture_this_reference);
@@ -42843,7 +42917,7 @@ var ts;
                 if (getNodeCheckFlags(current) & 8 /* CaptureNewTarget */) {
                     var isDeclaration_2 = node.kind !== 71 /* Identifier */;
                     if (isDeclaration_2) {
-                        error(node.name, ts.Diagnostics.Duplicate_identifier_newTarget_Compiler_uses_variable_declaration_newTarget_to_capture_new_target_meta_property_reference);
+                        error(ts.getNameOfDeclaration(node), ts.Diagnostics.Duplicate_identifier_newTarget_Compiler_uses_variable_declaration_newTarget_to_capture_new_target_meta_property_reference);
                     }
                     else {
                         error(node, ts.Diagnostics.Expression_resolves_to_variable_declaration_newTarget_that_compiler_uses_to_capture_new_target_meta_property_reference);
@@ -43109,7 +43183,7 @@ var ts;
                     checkTypeAssignableTo(checkExpressionCached(node.initializer), declarationType, node, /*headMessage*/ undefined);
                 }
                 if (!areDeclarationFlagsIdentical(node, symbol.valueDeclaration)) {
-                    error(symbol.valueDeclaration.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_modifiers, ts.declarationNameToString(node.name));
+                    error(ts.getNameOfDeclaration(symbol.valueDeclaration), ts.Diagnostics.All_declarations_of_0_must_have_identical_modifiers, ts.declarationNameToString(node.name));
                     error(node.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_modifiers, ts.declarationNameToString(node.name));
                 }
             }
@@ -43836,15 +43910,15 @@ var ts;
                 }
                 var propDeclaration = prop.valueDeclaration;
                 // index is numeric and property name is not valid numeric literal
-                if (indexKind === 1 /* Number */ && !(propDeclaration ? isNumericName(propDeclaration.name) : isNumericLiteralName(prop.name))) {
+                if (indexKind === 1 /* Number */ && !(propDeclaration ? isNumericName(ts.getNameOfDeclaration(propDeclaration)) : isNumericLiteralName(prop.name))) {
                     return;
                 }
                 // perform property check if property or indexer is declared in 'type'
-                // this allows to rule out cases when both property and indexer are inherited from the base class
+                // this allows us to rule out cases when both property and indexer are inherited from the base class
                 var errorNode;
                 if (propDeclaration &&
-                    (ts.getSpecialPropertyAssignmentKind(propDeclaration) === 4 /* ThisProperty */ ||
-                        propDeclaration.name.kind === 144 /* ComputedPropertyName */ ||
+                    (propDeclaration.kind === 194 /* BinaryExpression */ ||
+                        ts.getNameOfDeclaration(propDeclaration).kind === 144 /* ComputedPropertyName */ ||
                         prop.parent === containingType.symbol)) {
                     errorNode = propDeclaration;
                 }
@@ -44168,7 +44242,7 @@ var ts;
                         else {
                             errorMessage = ts.Diagnostics.Class_0_defines_instance_member_accessor_1_but_extended_class_2_defines_it_as_instance_member_function;
                         }
-                        error(derived.valueDeclaration.name || derived.valueDeclaration, errorMessage, typeToString(baseType), symbolToString(base), typeToString(type));
+                        error(ts.getNameOfDeclaration(derived.valueDeclaration) || derived.valueDeclaration, errorMessage, typeToString(baseType), symbolToString(base), typeToString(type));
                     }
                 }
             }
@@ -44463,7 +44537,7 @@ var ts;
                     // check that const is placed\omitted on all enum declarations
                     ts.forEach(enumSymbol.declarations, function (decl) {
                         if (ts.isConstEnumDeclaration(decl) !== enumIsConst) {
-                            error(decl.name, ts.Diagnostics.Enum_declarations_must_all_be_const_or_non_const);
+                            error(ts.getNameOfDeclaration(decl), ts.Diagnostics.Enum_declarations_must_all_be_const_or_non_const);
                         }
                     });
                 }
@@ -55839,7 +55913,7 @@ var ts;
             if (enabledSubstitutions & 2 /* BlockScopedBindings */ && !ts.isInternalName(node)) {
                 var declaration = resolver.getReferencedDeclarationWithCollidingName(node);
                 if (declaration && !(ts.isClassLike(declaration) && isPartOfClassBody(declaration, node))) {
-                    return ts.setTextRange(ts.getGeneratedNameForNode(declaration.name), node);
+                    return ts.setTextRange(ts.getGeneratedNameForNode(ts.getNameOfDeclaration(declaration)), node);
                 }
             }
             return node;
@@ -62374,7 +62448,7 @@ var ts;
         var errorNameNode;
         var emitJsDocComments = compilerOptions.removeComments ? ts.noop : writeJsDocComments;
         var emit = compilerOptions.stripInternal ? stripInternal : emitNode;
-        var noDeclare;
+        var needsDeclare = true;
         var moduleElementDeclarationEmitInfo = [];
         var asynchronousSubModuleDeclarationEmitInfo;
         // Contains the reference paths that needs to go in the declaration file.
@@ -62410,11 +62484,11 @@ var ts;
             }
             resultHasExternalModuleIndicator = false;
             if (!isBundledEmit || !ts.isExternalModule(sourceFile)) {
-                noDeclare = false;
+                needsDeclare = true;
                 emitSourceFile(sourceFile);
             }
             else if (ts.isExternalModule(sourceFile)) {
-                noDeclare = true;
+                needsDeclare = false;
                 write("declare module \"" + ts.getResolvedExternalModuleName(host, sourceFile) + "\" {");
                 writeLine();
                 increaseIndent();
@@ -62858,9 +62932,9 @@ var ts;
                 }
             }
         }
-        function emitTempVariableDeclaration(expr, baseName, diagnostic) {
+        function emitTempVariableDeclaration(expr, baseName, diagnostic, needsDeclare) {
             var tempVarName = getExportTempVariableName(baseName);
-            if (!noDeclare) {
+            if (needsDeclare) {
                 write("declare ");
             }
             write("const ");
@@ -62881,7 +62955,7 @@ var ts;
                 var tempVarName = emitTempVariableDeclaration(node.expression, "_default", {
                     diagnosticMessage: ts.Diagnostics.Default_export_of_the_module_has_or_is_using_private_name_0,
                     errorNode: node
-                });
+                }, needsDeclare);
                 write(node.isExportEquals ? "export = " : "export default ");
                 write(tempVarName);
             }
@@ -62965,7 +63039,7 @@ var ts;
                 if (modifiers & 512 /* Default */) {
                     write("default ");
                 }
-                else if (node.kind !== 230 /* InterfaceDeclaration */ && !noDeclare) {
+                else if (node.kind !== 230 /* InterfaceDeclaration */ && needsDeclare) {
                     write("declare ");
                 }
             }
@@ -63329,7 +63403,7 @@ var ts;
                     return {
                         diagnosticMessage: diagnosticMessage,
                         errorNode: node,
-                        typeName: node.parent.parent.name
+                        typeName: ts.getNameOfDeclaration(node.parent.parent)
                     };
                 }
             }
@@ -63355,7 +63429,7 @@ var ts;
                         diagnosticMessage: ts.Diagnostics.extends_clause_of_exported_class_0_has_or_is_using_private_name_1,
                         errorNode: baseTypeNode,
                         typeName: node.name
-                    });
+                    }, !ts.findAncestor(node, function (n) { return n.kind === 233 /* ModuleDeclaration */; }));
             }
             emitJsDocComments(node);
             emitModuleElementDeclarationFlags(node);
@@ -70251,7 +70325,7 @@ var ts;
                 case 153 /* GetAccessor */:
                 case 154 /* SetAccessor */:
                 case 233 /* ModuleDeclaration */:
-                    return node.parent.name === node;
+                    return ts.getNameOfDeclaration(node.parent) === node;
                 case 180 /* ElementAccessExpression */:
                     return node.parent.argumentExpression === node;
                 case 144 /* ComputedPropertyName */:
@@ -73800,7 +73874,7 @@ var ts;
                         // TODO(jfreeman): Account for computed property name
                         // NOTE: if one only performs this step when m.name is an identifier,
                         // things like '__proto__' are not filtered out.
-                        existingName = m.name.text;
+                        existingName = ts.getNameOfDeclaration(m).text;
                     }
                     existingMemberNames.set(existingName, true);
                 }
@@ -74996,8 +75070,8 @@ var ts;
             if (symbol.name !== "default") {
                 return symbol.name;
             }
-            var name = ts.forEach(symbol.declarations, function (_a) {
-                var name = _a.name;
+            var name = ts.forEach(symbol.declarations, function (decl) {
+                var name = ts.getNameOfDeclaration(decl);
                 return name && name.kind === 71 /* Identifier */ && name.text;
             });
             ts.Debug.assert(!!name);
@@ -75751,7 +75825,7 @@ var ts;
                  * position of property accessing, the referenceEntry of such position will be handled in the first case.
                  */
                 if (!(flags & 134217728 /* Transient */) && search.includes(shorthandValueSymbol)) {
-                    addReference(valueDeclaration.name, shorthandValueSymbol, search.location, state);
+                    addReference(ts.getNameOfDeclaration(valueDeclaration), shorthandValueSymbol, search.location, state);
                 }
             }
             function addReference(referenceLocation, relatedSymbol, searchLocation, state) {
@@ -76676,7 +76750,7 @@ var ts;
         }
         /** Creates a DefinitionInfo from a Declaration, using the declaration's name if possible. */
         function createDefinitionInfo(node, symbolKind, symbolName, containerName) {
-            return createDefinitionInfoFromName(node.name || node, symbolKind, symbolName, containerName);
+            return createDefinitionInfoFromName(ts.getNameOfDeclaration(node) || node, symbolKind, symbolName, containerName);
         }
         /** Creates a DefinitionInfo directly from the name of a declaration. */
         function createDefinitionInfoFromName(name, symbolKind, symbolName, containerName) {
@@ -77314,17 +77388,20 @@ var ts;
                 return undefined;
             }
             function tryAddSingleDeclarationName(declaration, containers) {
-                if (declaration && declaration.name) {
-                    var text = getTextOfIdentifierOrLiteral(declaration.name);
-                    if (text !== undefined) {
-                        containers.unshift(text);
-                    }
-                    else if (declaration.name.kind === 144 /* ComputedPropertyName */) {
-                        return tryAddComputedPropertyName(declaration.name.expression, containers, /*includeLastPortion*/ true);
-                    }
-                    else {
-                        // Don't know how to add this.
-                        return false;
+                if (declaration) {
+                    var name = ts.getNameOfDeclaration(declaration);
+                    if (name) {
+                        var text = getTextOfIdentifierOrLiteral(name);
+                        if (text !== undefined) {
+                            containers.unshift(text);
+                        }
+                        else if (name.kind === 144 /* ComputedPropertyName */) {
+                            return tryAddComputedPropertyName(name.expression, containers, /*includeLastPortion*/ true);
+                        }
+                        else {
+                            // Don't know how to add this.
+                            return false;
+                        }
                     }
                 }
                 return true;
@@ -77353,8 +77430,9 @@ var ts;
                 var containers = [];
                 // First, if we started with a computed property name, then add all but the last
                 // portion into the container array.
-                if (declaration.name.kind === 144 /* ComputedPropertyName */) {
-                    if (!tryAddComputedPropertyName(declaration.name.expression, containers, /*includeLastPortion*/ false)) {
+                var name = ts.getNameOfDeclaration(declaration);
+                if (name.kind === 144 /* ComputedPropertyName */) {
+                    if (!tryAddComputedPropertyName(name.expression, containers, /*includeLastPortion*/ false)) {
                         return undefined;
                     }
                 }
@@ -77392,6 +77470,7 @@ var ts;
             function createNavigateToItem(rawItem) {
                 var declaration = rawItem.declaration;
                 var container = ts.getContainerNode(declaration);
+                var containerName = container && ts.getNameOfDeclaration(container);
                 return {
                     name: rawItem.name,
                     kind: ts.getNodeKind(declaration),
@@ -77401,8 +77480,8 @@ var ts;
                     fileName: rawItem.fileName,
                     textSpan: ts.createTextSpanFromNode(declaration),
                     // TODO(jfreeman): What should be the containerName when the container has a computed name?
-                    containerName: container && container.name ? container.name.text : "",
-                    containerKind: container && container.name ? ts.getNodeKind(container) : ""
+                    containerName: containerName ? containerName.text : "",
+                    containerKind: containerName ? ts.getNodeKind(container) : ""
                 };
             }
         }
@@ -77654,8 +77733,8 @@ var ts;
         function mergeChildren(children) {
             var nameToItems = ts.createMap();
             ts.filterMutate(children, function (child) {
-                var decl = child.node;
-                var name = decl.name && nodeText(decl.name);
+                var declName = ts.getNameOfDeclaration(child.node);
+                var name = declName && nodeText(declName);
                 if (!name) {
                     // Anonymous items are never merged.
                     return true;
@@ -77744,9 +77823,9 @@ var ts;
             if (node.kind === 233 /* ModuleDeclaration */) {
                 return getModuleName(node);
             }
-            var decl = node;
-            if (decl.name) {
-                return ts.getPropertyNameForPropertyNameNode(decl.name);
+            var declName = ts.getNameOfDeclaration(node);
+            if (declName) {
+                return ts.getPropertyNameForPropertyNameNode(declName);
             }
             switch (node.kind) {
                 case 186 /* FunctionExpression */:
@@ -77763,7 +77842,7 @@ var ts;
             if (node.kind === 233 /* ModuleDeclaration */) {
                 return getModuleName(node);
             }
-            var name = node.name;
+            var name = ts.getNameOfDeclaration(node);
             if (name) {
                 var text = nodeText(name);
                 if (text.length > 0) {
@@ -82184,7 +82263,7 @@ var ts;
                     // falls through
                     case 149 /* PropertyDeclaration */:
                     case 146 /* Parameter */:
-                        return node.name.kind;
+                        return ts.getNameOfDeclaration(node).kind;
                 }
             }
             function getDynamicIndentation(node, nodeStartLine, indentation, delta) {
@@ -85023,7 +85102,7 @@ var ts;
             }
             var declaration = declarations[0];
             // Clone name to remove leading trivia.
-            var name = ts.getSynthesizedClone(declaration.name);
+            var name = ts.getSynthesizedClone(ts.getNameOfDeclaration(declaration));
             var visibilityModifier = createVisibilityModifier(ts.getModifierFlags(declaration));
             var modifiers = visibilityModifier ? ts.createNodeArray([visibilityModifier]) : undefined;
             var type = checker.getWidenedType(checker.getTypeOfSymbolAtLocation(symbol, enclosingDeclaration));
@@ -85584,13 +85663,14 @@ var ts;
                 return declarations;
             }
             function getDeclarationName(declaration) {
-                if (declaration.name) {
-                    var result_7 = getTextOfIdentifierOrLiteral(declaration.name);
+                var name = ts.getNameOfDeclaration(declaration);
+                if (name) {
+                    var result_7 = getTextOfIdentifierOrLiteral(name);
                     if (result_7 !== undefined) {
                         return result_7;
                     }
-                    if (declaration.name.kind === 144 /* ComputedPropertyName */) {
-                        var expr = declaration.name.expression;
+                    if (name.kind === 144 /* ComputedPropertyName */) {
+                        var expr = name.expression;
                         if (expr.kind === 179 /* PropertyAccessExpression */) {
                             return expr.name.text;
                         }
@@ -88143,6 +88223,9 @@ var ts;
                 var compilerOptions = JSON.parse(compilerOptionsJson);
                 var result = ts.resolveModuleName(moduleName, ts.normalizeSlashes(fileName), compilerOptions, _this.host);
                 var resolvedFileName = result.resolvedModule ? result.resolvedModule.resolvedFileName : undefined;
+                if (result.resolvedModule && result.resolvedModule.extension !== ts.Extension.Ts && result.resolvedModule.extension !== ts.Extension.Tsx && result.resolvedModule.extension !== ts.Extension.Dts) {
+                    resolvedFileName = undefined;
+                }
                 return {
                     resolvedFileName: resolvedFileName,
                     failedLookupLocations: result.failedLookupLocations