Put error spans deep on nested object literals (#25140)

* Add ncie deep elaborations

* Nice stuff

* Modify tuple error to use length error mroe often

* Accept good baselines

* Accept meh baselines

* Fix literal types

* Calculate elaborations like it was the very first time again~

* Use tristate for enum relationship to ensure elaborations are printed at least once

* Update message text, nits

* move some functions back to where they were

* Add test of deep JSX elaboration

* Add elaboration test with parenthesized expressions, comma expressions, and assignments

* Move check to allow elaborations on more anonymous types

* Fix nits

* Add specialized error to elaborations of nonliteral computed named-members

* Update error message

src/compiler/checker.ts

@@ -598,7 +598,7 @@ namespace ts {
         const definitelyAssignableRelation = createMap<RelationComparisonResult>();
         const comparableRelation = createMap<RelationComparisonResult>();
         const identityRelation = createMap<RelationComparisonResult>();
-        const enumRelation = createMap<boolean>();
+        const enumRelation = createMap<RelationComparisonResult>();
 
         type TypeSystemEntity = Symbol | Type | Signature;
 
@@ -10135,8 +10135,163 @@ namespace ts {
             return isTypeComparableTo(type1, type2) || isTypeComparableTo(type2, type1);
         }
 
-        function checkTypeAssignableTo(source: Type, target: Type, errorNode: Node | undefined, headMessage?: DiagnosticMessage, containingMessageChain?: () => DiagnosticMessageChain | undefined): boolean {
-            return checkTypeRelatedTo(source, target, assignableRelation, errorNode, headMessage, containingMessageChain);
+        function checkTypeAssignableTo(source: Type, target: Type, errorNode: Node | undefined, headMessage?: DiagnosticMessage, containingMessageChain?: () => DiagnosticMessageChain | undefined, errorOutputObject?: { error?: Diagnostic }): boolean {
+            return checkTypeRelatedTo(source, target, assignableRelation, errorNode, headMessage, containingMessageChain, errorOutputObject);
+        }
+
+        /**
+         * Like `checkTypeAssignableTo`, but if it would issue an error, instead performs structural comparisons of the types using the given expression node to
+         * attempt to issue more specific errors on, for example, specific object literal properties or tuple members.
+         */
+        function checkTypeAssignableToAndOptionallyElaborate(source: Type, target: Type, errorNode: Node | undefined, expr: Expression | undefined, headMessage?: DiagnosticMessage, containingMessageChain?: () => DiagnosticMessageChain | undefined): boolean {
+            if (isTypeAssignableTo(source, target)) return true;
+            if (!elaborateError(expr, source, target)) {
+                return checkTypeRelatedTo(source, target, assignableRelation, errorNode, headMessage, containingMessageChain);
+            }
+            return false;
+        }
+
+        function elaborateError(node: Expression | undefined, source: Type, target: Type): boolean {
+            if (!node) return false;
+            switch (node.kind) {
+                case SyntaxKind.JsxExpression:
+                case SyntaxKind.ParenthesizedExpression:
+                    return elaborateError((node as ParenthesizedExpression | JsxExpression).expression, source, target);
+                case SyntaxKind.BinaryExpression:
+                    switch ((node as BinaryExpression).operatorToken.kind) {
+                        case SyntaxKind.EqualsToken:
+                        case SyntaxKind.CommaToken:
+                            return elaborateError((node as BinaryExpression).right, source, target);
+                    }
+                    break;
+                case SyntaxKind.ObjectLiteralExpression:
+                    return elaborateObjectLiteral(node as ObjectLiteralExpression, source, target);
+                case SyntaxKind.ArrayLiteralExpression:
+                    return elaborateArrayLiteral(node as ArrayLiteralExpression, source, target);
+                case SyntaxKind.JsxAttributes:
+                    return elaborateJsxAttributes(node as JsxAttributes, source, target);
+            }
+            return false;
+        }
+
+        type ElaborationIterator = IterableIterator<{ errorNode: Node, innerExpression: Expression | undefined, nameType: Type, errorMessage?: DiagnosticMessage | undefined }>;
+        /**
+         * For every element returned from the iterator, checks that element to issue an error on a property of that element's type
+         * If that element would issue an error, we first attempt to dive into that element's inner expression and issue a more specific error by recuring into `elaborateError`
+         * Otherwise, we issue an error on _every_ element which fail the assignability check
+         */
+        function elaborateElementwise(iterator: ElaborationIterator, source: Type, target: Type) {
+            // Assignability failure - check each prop individually, and if that fails, fall back on the bad error span
+            let reportedError = false;
+            for (let status = iterator.next(); !status.done; status = iterator.next()) {
+                const { errorNode: prop, innerExpression: next, nameType, errorMessage } = status.value;
+                const sourcePropType = getIndexedAccessType(source, nameType);
+                const targetPropType = getIndexedAccessType(target, nameType);
+                if (!isTypeAssignableTo(sourcePropType, targetPropType)) {
+                    const elaborated = next && elaborateError(next, sourcePropType, targetPropType);
+                    if (elaborated) {
+                        reportedError = true;
+                    }
+                    else {
+                        // Issue error on the prop itself, since the prop couldn't elaborate the error
+                        const resultObj: { error?: Diagnostic } = {};
+                        // Use the expression type, if available
+                        const specificSource = next ? checkExpressionForMutableLocation(next, CheckMode.Normal, sourcePropType) : sourcePropType;
+                        const result = checkTypeAssignableTo(specificSource, targetPropType, prop, errorMessage, /*containingChain*/ undefined, resultObj);
+                        if (result && specificSource !== sourcePropType) {
+                            // If for whatever reason the expression type doesn't yield an error, make sure we still issue an error on the sourcePropType
+                            checkTypeAssignableTo(sourcePropType, targetPropType, prop, errorMessage, /*containingChain*/ undefined, resultObj);
+                        }
+                        if (resultObj.error) {
+                            const reportedDiag = resultObj.error;
+                            const propertyName = isTypeUsableAsLateBoundName(nameType) ? getLateBoundNameFromType(nameType) : undefined;
+                            const targetProp = propertyName !== undefined ? getPropertyOfType(target, propertyName) : undefined;
+
+                            let issuedElaboration = false;
+                            if (!targetProp) {
+                                const indexInfo = isTypeAssignableToKind(nameType, TypeFlags.NumberLike) && getIndexInfoOfType(target, IndexKind.Number) ||
+                                    getIndexInfoOfType(target, IndexKind.String) ||
+                                    undefined;
+                                if (indexInfo && indexInfo.declaration) {
+                                    issuedElaboration = true;
+                                    addRelatedInfo(reportedDiag, createDiagnosticForNode(indexInfo.declaration, Diagnostics.The_expected_type_comes_from_this_index_signature));
+                                }
+                            }
+
+                            if (!issuedElaboration && (length(targetProp && targetProp.declarations) || length(target.symbol && target.symbol.declarations))) {
+                                addRelatedInfo(reportedDiag, createDiagnosticForNode(
+                                    targetProp ? targetProp.declarations[0] : target.symbol.declarations[0],
+                                    Diagnostics.The_expected_type_comes_from_property_0_which_is_declared_here_on_type_1,
+                                    propertyName && !(nameType.flags & TypeFlags.UniqueESSymbol) ? unescapeLeadingUnderscores(propertyName) : typeToString(nameType),
+                                    typeToString(target)
+                                ));
+                            }
+                        }
+                        reportedError = true;
+                    }
+                }
+            }
+            return reportedError;
+        }
+
+        function *generateJsxAttributes(node: JsxAttributes): ElaborationIterator {
+            if (!length(node.properties)) return;
+            for (const prop of node.properties) {
+                if (isJsxSpreadAttribute(prop)) continue;
+                yield { errorNode: prop.name, innerExpression: prop.initializer, nameType: getLiteralType(idText(prop.name)) };
+            }
+        }
+
+        function elaborateJsxAttributes(node: JsxAttributes, source: Type, target: Type) {
+            return elaborateElementwise(generateJsxAttributes(node), source, target);
+        }
+
+        function *generateLimitedTupleElements(node: ArrayLiteralExpression, target: Type): ElaborationIterator {
+            const len = length(node.elements);
+            if (!len) return;
+            for (let i = 0; i < len; i++) {
+                // Skip elements which do not exist in the target - a length error on the tuple overall is likely better than an error on a mismatched index signature
+                if (isTupleLikeType(target) && !getPropertyOfType(target, ("" + i) as __String)) continue;
+                const elem = node.elements[i];
+                if (isOmittedExpression(elem)) continue;
+                const nameType = getLiteralType(i);
+                yield { errorNode: elem, innerExpression: elem, nameType };
+            }
+        }
+
+        function elaborateArrayLiteral(node: ArrayLiteralExpression, source: Type, target: Type) {
+            if (isTupleLikeType(source)) {
+                return elaborateElementwise(generateLimitedTupleElements(node, target), source, target);
+            }
+            return false;
+        }
+
+        function *generateObjectLiteralElements(node: ObjectLiteralExpression): ElaborationIterator {
+            if (!length(node.properties)) return;
+            for (const prop of node.properties) {
+                if (isSpreadAssignment(prop)) continue;
+                const type = getLiteralTypeFromPropertyName(getSymbolOfNode(prop), TypeFlags.StringOrNumberLiteralOrUnique);
+                if (!type || (type.flags & TypeFlags.Never)) {
+                    continue;
+                }
+                switch (prop.kind) {
+                    case SyntaxKind.SetAccessor:
+                    case SyntaxKind.GetAccessor:
+                    case SyntaxKind.MethodDeclaration:
+                    case SyntaxKind.ShorthandPropertyAssignment:
+                        yield { errorNode: prop.name, innerExpression: undefined, nameType: type };
+                        break;
+                    case SyntaxKind.PropertyAssignment:
+                        yield { errorNode: prop.name, innerExpression: prop.initializer, nameType: type, errorMessage: isComputedNonLiteralName(prop.name) ? Diagnostics.Type_of_computed_property_s_value_is_0_which_is_not_assignable_to_type_1 : undefined };
+                        break;
+                    default:
+                        Debug.assertNever(prop);
+                }
+            }
+        }
+
+        function elaborateObjectLiteral(node: ObjectLiteralExpression, source: Type, target: Type) {
+            return elaborateElementwise(generateObjectLiteralElements(node), source, target);
         }
 
         /**
@@ -10351,11 +10506,11 @@ namespace ts {
             }
             const id = getSymbolId(sourceSymbol) + "," + getSymbolId(targetSymbol);
             const relation = enumRelation.get(id);
-            if (relation !== undefined) {
-                return relation;
+            if (relation !== undefined && !(relation === RelationComparisonResult.Failed && errorReporter)) {
+                return relation === RelationComparisonResult.Succeeded;
             }
             if (sourceSymbol.escapedName !== targetSymbol.escapedName || !(sourceSymbol.flags & SymbolFlags.RegularEnum) || !(targetSymbol.flags & SymbolFlags.RegularEnum)) {
-                enumRelation.set(id, false);
+                enumRelation.set(id, RelationComparisonResult.FailedAndReported);
                 return false;
             }
             const targetEnumType = getTypeOfSymbol(targetSymbol);
@@ -10366,13 +10521,16 @@ namespace ts {
                         if (errorReporter) {
                             errorReporter(Diagnostics.Property_0_is_missing_in_type_1, symbolName(property),
                                 typeToString(getDeclaredTypeOfSymbol(targetSymbol), /*enclosingDeclaration*/ undefined, TypeFormatFlags.UseFullyQualifiedType));
+                            enumRelation.set(id, RelationComparisonResult.FailedAndReported);
+                        }
+                        else {
+                            enumRelation.set(id, RelationComparisonResult.Failed);
                         }
-                        enumRelation.set(id, false);
                         return false;
                     }
                 }
             }
-            enumRelation.set(id, true);
+            enumRelation.set(id, RelationComparisonResult.Succeeded);
             return true;
         }
 
@@ -10457,7 +10615,9 @@ namespace ts {
             relation: Map<RelationComparisonResult>,
             errorNode: Node | undefined,
             headMessage?: DiagnosticMessage,
-            containingMessageChain?: () => DiagnosticMessageChain | undefined): boolean {
+            containingMessageChain?: () => DiagnosticMessageChain | undefined,
+            errorOutputContainer?: { error?: Diagnostic }
+        ): boolean {
 
             let errorInfo: DiagnosticMessageChain | undefined;
             let maybeKeys: string[];
@@ -10497,7 +10657,11 @@ namespace ts {
                     }
                 }
 
-                diagnostics.add(createDiagnosticForNodeFromMessageChain(errorNode!, errorInfo, relatedInformation)); // TODO: GH#18217
+                const diag = createDiagnosticForNodeFromMessageChain(errorNode!, errorInfo, relatedInformation);
+                if (errorOutputContainer) {
+                    errorOutputContainer.error = diag;
+                }
+                diagnostics.add(diag); // TODO: GH#18217
             }
             return result !== Ternary.False;
 
@@ -11019,9 +11183,8 @@ namespace ts {
                 const related = relation.get(id);
                 if (related !== undefined) {
                     if (reportErrors && related === RelationComparisonResult.Failed) {
-                        // We are elaborating errors and the cached result is an unreported failure. Record the result as a reported
-                        // failure and continue computing the relation such that errors get reported.
-                        relation.set(id, RelationComparisonResult.FailedAndReported);
+                        // We are elaborating errors and the cached result is an unreported failure. The result will be reported
+                        // as a failure, and should be updated as a reported failure by the bottom of this function.
                     }
                     else {
                         return related === RelationComparisonResult.Succeeded ? Ternary.True : Ternary.False;
@@ -15636,7 +15799,7 @@ namespace ts {
                     const discriminatingType = checkExpression(prop.initializer);
                     for (const type of (contextualType as UnionType).types) {
                         const targetType = getTypeOfPropertyOfType(type, prop.symbol.escapedName);
-                        if (targetType && checkTypeAssignableTo(discriminatingType, targetType, /*errorNode*/ undefined)) {
+                        if (targetType && isTypeAssignableTo(discriminatingType, targetType)) {
                             if (match) {
                                 if (type === match) continue; // Finding multiple fields which discriminate to the same type is fine
                                 match = undefined;
@@ -17153,30 +17316,7 @@ namespace ts {
                 }
             }
             else if (!isSourceAttributeTypeAssignableToTarget) {
-                // Assignability failure - check each prop individually, and if that fails, fall back on the bad error span
-                if (length(openingLikeElement.attributes.properties)) {
-                    let reportedError = false;
-                    for (const prop of openingLikeElement.attributes.properties) {
-                        if (isJsxSpreadAttribute(prop)) continue;
-                        const name = idText(prop.name);
-                        const sourcePropType = getIndexedAccessType(sourceAttributesType, getLiteralType(name));
-                        const targetPropType = getIndexedAccessType(targetAttributesType, getLiteralType(name));
-                        const rootChain = () => chainDiagnosticMessages(
-                            /*details*/ undefined,
-                            Diagnostics.Types_of_property_0_are_incompatible,
-                            name,
-                        );
-                        if (!checkTypeAssignableTo(sourcePropType, targetPropType, prop, /*headMessage*/ undefined, rootChain)) {
-                            reportedError = true;
-                        }
-                    }
-
-                    if (reportedError) {
-                        return;
-                    }
-                }
-                // Report fallback error on just the component name
-                checkTypeAssignableTo(sourceAttributesType, targetAttributesType, openingLikeElement.tagName);
+                checkTypeAssignableToAndOptionallyElaborate(sourceAttributesType, targetAttributesType, openingLikeElement.tagName, openingLikeElement.attributes);
             }
         }
 
@@ -20160,10 +20300,10 @@ namespace ts {
                     if (returnOrPromisedType) {
                         if ((functionFlags & FunctionFlags.AsyncGenerator) === FunctionFlags.Async) { // Async function
                             const awaitedType = checkAwaitedType(exprType, node.body, Diagnostics.The_return_type_of_an_async_function_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member);
-                            checkTypeAssignableTo(awaitedType, returnOrPromisedType, node.body);
+                            checkTypeAssignableToAndOptionallyElaborate(awaitedType, returnOrPromisedType, node.body, node.body);
                         }
                         else { // Normal function
-                            checkTypeAssignableTo(exprType, returnOrPromisedType, node.body);
+                            checkTypeAssignableToAndOptionallyElaborate(exprType, returnOrPromisedType, node.body, node.body);
                         }
                     }
                 }
@@ -20581,7 +20721,7 @@ namespace ts {
                 Diagnostics.The_target_of_an_object_rest_assignment_must_be_a_variable_or_a_property_access :
                 Diagnostics.The_left_hand_side_of_an_assignment_expression_must_be_a_variable_or_a_property_access;
             if (checkReferenceExpression(target, error)) {
-                checkTypeAssignableTo(sourceType, targetType, target, /*headMessage*/ undefined);
+                checkTypeAssignableToAndOptionallyElaborate(sourceType, targetType, target, target);
             }
             return sourceType;
         }
@@ -20880,7 +21020,7 @@ namespace ts {
                     if (checkReferenceExpression(left, Diagnostics.The_left_hand_side_of_an_assignment_expression_must_be_a_variable_or_a_property_access)
                         && (!isIdentifier(left) || unescapeLeadingUnderscores(left.escapedText) !== "exports")) {
                         // to avoid cascading errors check assignability only if 'isReference' check succeeded and no errors were reported
-                        checkTypeAssignableTo(valueType, leftType, left, /*headMessage*/ undefined);
+                        checkTypeAssignableToAndOptionallyElaborate(valueType, leftType, left, right);
                     }
                 }
             }
@@ -20992,7 +21132,7 @@ namespace ts {
             const returnType = getEffectiveReturnTypeNode(func);
             if (returnType) {
                 const signatureElementType = getIteratedTypeOfGenerator(getTypeFromTypeNode(returnType), isAsync) || anyType;
-                checkTypeAssignableTo(yieldedType, signatureElementType, node.expression || node, /*headMessage*/ undefined);
+                checkTypeAssignableToAndOptionallyElaborate(yieldedType, signatureElementType, node.expression || node, node.expression);
             }
 
             // Both yield and yield* expressions have type 'any'
@@ -23713,7 +23853,7 @@ namespace ts {
                         checkNonNullType(initializerType, node);
                     }
                     else {
-                        checkTypeAssignableTo(initializerType, getWidenedTypeForVariableLikeDeclaration(node), node, /*headMessage*/ undefined);
+                        checkTypeAssignableToAndOptionallyElaborate(initializerType, getWidenedTypeForVariableLikeDeclaration(node), node, node.initializer);
                     }
                     checkParameterInitializer(node);
                 }
@@ -23731,7 +23871,7 @@ namespace ts {
                         (initializer.properties.length === 0 || isPrototypeAccess(node.name)) &&
                         hasEntries(symbol.exports);
                     if (!isJSObjectLiteralInitializer && node.parent.parent.kind !== SyntaxKind.ForInStatement) {
-                        checkTypeAssignableTo(checkExpressionCached(initializer), type, node, /*headMessage*/ undefined);
+                        checkTypeAssignableToAndOptionallyElaborate(checkExpressionCached(initializer), type, node, initializer, /*headMessage*/ undefined);
                         checkParameterInitializer(node);
                     }
                 }
@@ -23747,7 +23887,7 @@ namespace ts {
                     errorNextVariableOrPropertyDeclarationMustHaveSameType(type, node, declarationType);
                 }
                 if (node.initializer) {
-                    checkTypeAssignableTo(checkExpressionCached(node.initializer), declarationType, node, /*headMessage*/ undefined);
+                    checkTypeAssignableToAndOptionallyElaborate(checkExpressionCached(node.initializer), declarationType, node, node.initializer, /*headMessage*/ undefined);
                 }
                 if (!areDeclarationFlagsIdentical(node, symbol.valueDeclaration)) {
                     error(getNameOfDeclaration(symbol.valueDeclaration), Diagnostics.All_declarations_of_0_must_have_identical_modifiers, declarationNameToString(node.name));
@@ -23920,7 +24060,7 @@ namespace ts {
                     // because we accessed properties from anyType, or it may have led to an error inside
                     // getElementTypeOfIterable.
                     if (iteratedType) {
-                        checkTypeAssignableTo(iteratedType, leftType, varExpr, /*headMessage*/ undefined);
+                        checkTypeAssignableToAndOptionallyElaborate(iteratedType, leftType, varExpr, node.expression);
                     }
                 }
             }
@@ -24364,7 +24504,7 @@ namespace ts {
                     }
                 }
                 else if (func.kind === SyntaxKind.Constructor) {
-                    if (node.expression && !checkTypeAssignableTo(exprType, returnType, node)) {
+                    if (node.expression && !checkTypeAssignableToAndOptionallyElaborate(exprType, returnType, node, node.expression)) {
                         error(node, Diagnostics.Return_type_of_constructor_signature_must_be_assignable_to_the_instance_type_of_the_class);
                     }
                 }
@@ -24380,7 +24520,7 @@ namespace ts {
                         }
                     }
                     else {
-                        checkTypeAssignableTo(exprType, returnType, node);
+                        checkTypeAssignableToAndOptionallyElaborate(exprType, returnType, node, node.expression);
                     }
                 }
             }

src/compiler/diagnosticMessages.json

@@ -1452,6 +1452,10 @@
         "category": "Error",
         "code": 2417
     },
+    "Type of computed property's value is '{0}', which is not assignable to type '{1}'.": {
+        "category": "Error",
+        "code": 2418
+    },
     "Class '{0}' incorrectly implements interface '{1}'.": {
         "category": "Error",
         "code": 2420
@@ -3754,6 +3758,15 @@
         "code": 6371
     },
 
+    "The expected type comes from property '{0}' which is declared here on type '{1}'": {
+        "category": "Message",
+        "code": 6500
+    },
+    "The expected type comes from this index signature.": {
+        "category": "Message",
+        "code": 6501
+    },
+
     "Variable '{0}' implicitly has an '{1}' type.": {
         "category": "Error",
         "code": 7005

src/tsconfig-base.json

@@ -1,7 +1,7 @@
 {
     "compilerOptions": {
         "pretty": true,
-        "lib": ["es5"],
+        "lib": ["es2015"],
         "target": "es5",
 
         "declaration": true,

tests/baselines/reference/api/tsserverlibrary.d.ts

@@ -5193,6 +5193,7 @@ declare namespace ts {
         Class_0_incorrectly_extends_base_class_1: DiagnosticMessage;
         Property_0_in_type_1_is_not_assignable_to_the_same_property_in_base_type_2: DiagnosticMessage;
         Class_static_side_0_incorrectly_extends_base_class_static_side_1: DiagnosticMessage;
+        Type_of_computed_property_s_value_is_0_which_is_not_assignable_to_type_1: DiagnosticMessage;
         Class_0_incorrectly_implements_interface_1: DiagnosticMessage;
         A_class_may_only_implement_another_class_or_interface: DiagnosticMessage;
         Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_accessor: DiagnosticMessage;
@@ -5765,6 +5766,8 @@ declare namespace ts {
         Option_build_must_be_the_first_command_line_argument: DiagnosticMessage;
         Options_0_and_1_cannot_be_combined: DiagnosticMessage;
         Skipping_clean_because_not_all_projects_could_be_located: DiagnosticMessage;
+        The_expected_type_comes_from_property_0_which_is_declared_here_on_type_1: DiagnosticMessage;
+        The_expected_type_comes_from_this_index_signature: DiagnosticMessage;
         Variable_0_implicitly_has_an_1_type: DiagnosticMessage;
         Parameter_0_implicitly_has_an_1_type: DiagnosticMessage;
         Member_0_implicitly_has_an_1_type: DiagnosticMessage;

tests/baselines/reference/arrayLiterals3.errors.txt

@@ -1,7 +1,8 @@
 tests/cases/conformance/expressions/arrayLiterals/arrayLiterals3.ts(10,5): error TS2322: Type '[]' is not assignable to type '[any, any, any]'.
   Property '0' is missing in type '[]'.
-tests/cases/conformance/expressions/arrayLiterals/arrayLiterals3.ts(11,5): error TS2322: Type '[string, number, boolean]' is not assignable to type '[boolean, string, number]'.
-  Type 'string' is not assignable to type 'boolean'.
+tests/cases/conformance/expressions/arrayLiterals/arrayLiterals3.ts(11,38): error TS2322: Type 'string' is not assignable to type 'boolean'.
+tests/cases/conformance/expressions/arrayLiterals/arrayLiterals3.ts(11,48): error TS2322: Type 'number' is not assignable to type 'string'.
+tests/cases/conformance/expressions/arrayLiterals/arrayLiterals3.ts(11,51): error TS2322: Type 'true' is not assignable to type 'number'.
 tests/cases/conformance/expressions/arrayLiterals/arrayLiterals3.ts(17,5): error TS2322: Type '[number, number, string, boolean]' is not assignable to type '[number, number]'.
   Types of property 'length' are incompatible.
     Type '4' is not assignable to type '2'.
@@ -18,7 +19,7 @@ tests/cases/conformance/expressions/arrayLiterals/arrayLiterals3.ts(34,5): error
             'number' is a primitive, but 'Number' is a wrapper object. Prefer using 'number' when possible.
 
 
-==== tests/cases/conformance/expressions/arrayLiterals/arrayLiterals3.ts (6 errors) ====
+==== tests/cases/conformance/expressions/arrayLiterals/arrayLiterals3.ts (8 errors) ====
     // Each element expression in a non-empty array literal is processed as follows:
     //    - If the array literal contains no spread elements, and if the array literal is contextually typed (section 4.19)
     //      by a type T and T has a property with the numeric name N, where N is the index of the element expression in the array literal,
@@ -33,9 +34,12 @@ tests/cases/conformance/expressions/arrayLiterals/arrayLiterals3.ts(34,5): error
 !!! error TS2322: Type '[]' is not assignable to type '[any, any, any]'.
 !!! error TS2322:   Property '0' is missing in type '[]'.
     var a1: [boolean, string, number] = ["string", 1, true];  // Error
-        ~~
-!!! error TS2322: Type '[string, number, boolean]' is not assignable to type '[boolean, string, number]'.
-!!! error TS2322:   Type 'string' is not assignable to type 'boolean'.
+                                         ~~~~~~~~
+!!! error TS2322: Type 'string' is not assignable to type 'boolean'.
+                                                   ~
+!!! error TS2322: Type 'number' is not assignable to type 'string'.
+                                                      ~~~~
+!!! error TS2322: Type 'true' is not assignable to type 'number'.
     
     // The resulting type an array literal expression is determined as follows:
     //     - If the array literal contains no spread elements and is an array assignment pattern in a destructuring assignment (section 4.17.1),

tests/baselines/reference/assignmentToObjectAndFunction.errors.txt

@@ -1,6 +1,4 @@
-tests/cases/compiler/assignmentToObjectAndFunction.ts(1,5): error TS2322: Type '{ toString: number; }' is not assignable to type 'Object'.
-  Types of property 'toString' are incompatible.
-    Type 'number' is not assignable to type '() => string'.
+tests/cases/compiler/assignmentToObjectAndFunction.ts(1,24): error TS2322: Type 'number' is not assignable to type '() => string'.
 tests/cases/compiler/assignmentToObjectAndFunction.ts(8,5): error TS2322: Type '{}' is not assignable to type 'Function'.
   Property 'apply' is missing in type '{}'.
 tests/cases/compiler/assignmentToObjectAndFunction.ts(29,5): error TS2322: Type 'typeof bad' is not assignable to type 'Function'.
@@ -10,10 +8,9 @@ tests/cases/compiler/assignmentToObjectAndFunction.ts(29,5): error TS2322: Type
 
 ==== tests/cases/compiler/assignmentToObjectAndFunction.ts (3 errors) ====
     var errObj: Object = { toString: 0 }; // Error, incompatible toString
-        ~~~~~~
-!!! error TS2322: Type '{ toString: number; }' is not assignable to type 'Object'.
-!!! error TS2322:   Types of property 'toString' are incompatible.
-!!! error TS2322:     Type 'number' is not assignable to type '() => string'.
+                           ~~~~~~~~
+!!! error TS2322: Type 'number' is not assignable to type '() => string'.
+!!! related TS6500 /.ts/lib.es5.d.ts:125:5: The expected type comes from property 'toString' which is declared here on type 'Object'
     var goodObj: Object = {
         toString(x?) {
             return "";

tests/baselines/reference/assignmentToParenthesizedIdentifiers.errors.txt

@@ -6,15 +6,9 @@ tests/cases/conformance/expressions/valuesAndReferences/assignmentToParenthesize
 tests/cases/conformance/expressions/valuesAndReferences/assignmentToParenthesizedIdentifiers.ts(17,1): error TS2539: Cannot assign to 'M' because it is not a variable.
 tests/cases/conformance/expressions/valuesAndReferences/assignmentToParenthesizedIdentifiers.ts(18,2): error TS2539: Cannot assign to 'M' because it is not a variable.
 tests/cases/conformance/expressions/valuesAndReferences/assignmentToParenthesizedIdentifiers.ts(25,5): error TS2539: Cannot assign to 'M3' because it is not a variable.
-tests/cases/conformance/expressions/valuesAndReferences/assignmentToParenthesizedIdentifiers.ts(31,1): error TS2322: Type '{ x: string; }' is not assignable to type 'typeof M3'.
-  Types of property 'x' are incompatible.
-    Type 'string' is not assignable to type 'number'.
-tests/cases/conformance/expressions/valuesAndReferences/assignmentToParenthesizedIdentifiers.ts(32,1): error TS2322: Type '{ x: string; }' is not assignable to type 'typeof M3'.
-  Types of property 'x' are incompatible.
-    Type 'string' is not assignable to type 'number'.
-tests/cases/conformance/expressions/valuesAndReferences/assignmentToParenthesizedIdentifiers.ts(33,1): error TS2322: Type '{ x: string; }' is not assignable to type 'typeof M3'.
-  Types of property 'x' are incompatible.
-    Type 'string' is not assignable to type 'number'.
+tests/cases/conformance/expressions/valuesAndReferences/assignmentToParenthesizedIdentifiers.ts(31,11): error TS2322: Type 'string' is not assignable to type 'number'.
+tests/cases/conformance/expressions/valuesAndReferences/assignmentToParenthesizedIdentifiers.ts(32,13): error TS2322: Type 'string' is not assignable to type 'number'.
+tests/cases/conformance/expressions/valuesAndReferences/assignmentToParenthesizedIdentifiers.ts(33,13): error TS2322: Type 'string' is not assignable to type 'number'.
 tests/cases/conformance/expressions/valuesAndReferences/assignmentToParenthesizedIdentifiers.ts(37,1): error TS2539: Cannot assign to 'fn' because it is not a variable.
 tests/cases/conformance/expressions/valuesAndReferences/assignmentToParenthesizedIdentifiers.ts(38,2): error TS2539: Cannot assign to 'fn' because it is not a variable.
 tests/cases/conformance/expressions/valuesAndReferences/assignmentToParenthesizedIdentifiers.ts(43,5): error TS2322: Type '""' is not assignable to type 'number'.
@@ -78,20 +72,17 @@ tests/cases/conformance/expressions/valuesAndReferences/assignmentToParenthesize
     (M2.M3) = { x: 3 }; // OK
     
     M2.M3 = { x: '' }; // Error
-    ~~~~~
-!!! error TS2322: Type '{ x: string; }' is not assignable to type 'typeof M3'.
-!!! error TS2322:   Types of property 'x' are incompatible.
-!!! error TS2322:     Type 'string' is not assignable to type 'number'.
+              ~
+!!! error TS2322: Type 'string' is not assignable to type 'number'.
+!!! related TS6500 tests/cases/conformance/expressions/valuesAndReferences/assignmentToParenthesizedIdentifiers.ts:22:20: The expected type comes from property 'x' which is declared here on type 'typeof M3'
     (M2).M3 = { x: '' }; // Error
-    ~~~~~~~
-!!! error TS2322: Type '{ x: string; }' is not assignable to type 'typeof M3'.
-!!! error TS2322:   Types of property 'x' are incompatible.
-!!! error TS2322:     Type 'string' is not assignable to type 'number'.
+                ~
+!!! error TS2322: Type 'string' is not assignable to type 'number'.
+!!! related TS6500 tests/cases/conformance/expressions/valuesAndReferences/assignmentToParenthesizedIdentifiers.ts:22:20: The expected type comes from property 'x' which is declared here on type 'typeof M3'
     (M2.M3) = { x: '' }; // Error
-    ~~~~~~~
-!!! error TS2322: Type '{ x: string; }' is not assignable to type 'typeof M3'.
-!!! error TS2322:   Types of property 'x' are incompatible.
-!!! error TS2322:     Type 'string' is not assignable to type 'number'.
+                ~
+!!! error TS2322: Type 'string' is not assignable to type 'number'.
+!!! related TS6500 tests/cases/conformance/expressions/valuesAndReferences/assignmentToParenthesizedIdentifiers.ts:22:20: The expected type comes from property 'x' which is declared here on type 'typeof M3'
     
     
     function fn() { }

tests/baselines/reference/baseClassImprovedMismatchErrors.errors.txt

@@ -5,7 +5,6 @@ tests/cases/compiler/baseClassImprovedMismatchErrors.ts(8,5): error TS2416: Prop
         Types of property 'n' are incompatible.
           Type 'string | Derived' is not assignable to type 'string | Base'.
             Type 'Derived' is not assignable to type 'string | Base'.
-              Type 'Derived' is not assignable to type 'Base'.
 tests/cases/compiler/baseClassImprovedMismatchErrors.ts(9,5): error TS2416: Property 'fn' in type 'Derived' is not assignable to the same property in base type 'Base'.
   Type '() => string | number' is not assignable to type '() => number'.
     Type 'string | number' is not assignable to type 'number'.
@@ -17,7 +16,6 @@ tests/cases/compiler/baseClassImprovedMismatchErrors.ts(14,5): error TS2416: Pro
         Types of property 'n' are incompatible.
           Type 'string | DerivedInterface' is not assignable to type 'string | Base'.
             Type 'DerivedInterface' is not assignable to type 'string | Base'.
-              Type 'DerivedInterface' is not assignable to type 'Base'.
 tests/cases/compiler/baseClassImprovedMismatchErrors.ts(15,5): error TS2416: Property 'fn' in type 'DerivedInterface' is not assignable to the same property in base type 'Base'.
   Type '() => string | number' is not assignable to type '() => number'.
     Type 'string | number' is not assignable to type 'number'.
@@ -41,7 +39,6 @@ tests/cases/compiler/baseClassImprovedMismatchErrors.ts(15,5): error TS2416: Pro
 !!! error TS2416:         Types of property 'n' are incompatible.
 !!! error TS2416:           Type 'string | Derived' is not assignable to type 'string | Base'.
 !!! error TS2416:             Type 'Derived' is not assignable to type 'string | Base'.
-!!! error TS2416:               Type 'Derived' is not assignable to type 'Base'.
         fn() {
         ~~
 !!! error TS2416: Property 'fn' in type 'Derived' is not assignable to the same property in base type 'Base'.
@@ -61,7 +58,6 @@ tests/cases/compiler/baseClassImprovedMismatchErrors.ts(15,5): error TS2416: Pro
 !!! error TS2416:         Types of property 'n' are incompatible.
 !!! error TS2416:           Type 'string | DerivedInterface' is not assignable to type 'string | Base'.
 !!! error TS2416:             Type 'DerivedInterface' is not assignable to type 'string | Base'.
-!!! error TS2416:               Type 'DerivedInterface' is not assignable to type 'Base'.
         fn() {
         ~~
 !!! error TS2416: Property 'fn' in type 'DerivedInterface' is not assignable to the same property in base type 'Base'.

tests/baselines/reference/checkJsxGenericTagHasCorrectInferences.errors.txt

@@ -1,6 +1,5 @@
-tests/cases/conformance/jsx/file.tsx(13,54): error TS2326: Types of property 'nextValues' are incompatible.
-  Type '(a: { x: string; }) => string' is not assignable to type '(cur: { x: string; }) => { x: string; }'.
-    Type 'string' is not assignable to type '{ x: string; }'.
+tests/cases/conformance/jsx/file.tsx(13,54): error TS2322: Type '(a: { x: string; }) => string' is not assignable to type '(cur: { x: string; }) => { x: string; }'.
+  Type 'string' is not assignable to type '{ x: string; }'.
 
 
 ==== tests/cases/conformance/jsx/file.tsx (1 errors) ====
@@ -17,7 +16,7 @@ tests/cases/conformance/jsx/file.tsx(13,54): error TS2326: Types of property 'ne
     let b = <GenericComponent initialValues={12} nextValues={a => a} />; // No error - Values should be reinstantiated with `number` (since `object` is a default, not a constraint)
     let c = <GenericComponent initialValues={{ x: "y" }} nextValues={a => ({ x: a.x })} />; // No Error
     let d = <GenericComponent initialValues={{ x: "y" }} nextValues={a => a.x} />; // Error - `string` is not assignable to `{x: string}`
-                                                         ~~~~~~~~~~~~~~~~~~~~~
-!!! error TS2326: Types of property 'nextValues' are incompatible.
-!!! error TS2326:   Type '(a: { x: string; }) => string' is not assignable to type '(cur: { x: string; }) => { x: string; }'.
-!!! error TS2326:     Type 'string' is not assignable to type '{ x: string; }'.
+                                                         ~~~~~~~~~~
+!!! error TS2322: Type '(a: { x: string; }) => string' is not assignable to type '(cur: { x: string; }) => { x: string; }'.
+!!! error TS2322:   Type 'string' is not assignable to type '{ x: string; }'.
+!!! related TS6500 tests/cases/conformance/jsx/file.tsx:13:54: The expected type comes from property 'nextValues' which is declared here on type 'IntrinsicAttributes & IntrinsicClassAttributes<GenericComponent<{ initialValues: { x: string; }; nextValues: {}; }, { x: string; }>> & { initialValues: { x: string; }; nextValues: {}; } & BaseProps<{ x: string; }> & { children?: ReactNode; }'

tests/baselines/reference/computedPropertyNamesContextualType8_ES5.errors.txt

@@ -1,21 +1,20 @@
-tests/cases/conformance/es6/computedProperties/computedPropertyNamesContextualType8_ES5.ts(6,5): error TS2322: Type '{ [x: string]: string | number; }' is not assignable to type 'I'.
-  Index signatures are incompatible.
-    Type 'string | number' is not assignable to type 'boolean'.
-      Type 'string' is not assignable to type 'boolean'.
+tests/cases/conformance/es6/computedProperties/computedPropertyNamesContextualType8_ES5.ts(7,5): error TS2418: Type of computed property's value is 'string', which is not assignable to type 'boolean'.
+tests/cases/conformance/es6/computedProperties/computedPropertyNamesContextualType8_ES5.ts(8,5): error TS2418: Type of computed property's value is 'number', which is not assignable to type 'boolean'.
 
 
-==== tests/cases/conformance/es6/computedProperties/computedPropertyNamesContextualType8_ES5.ts (1 errors) ====
+==== tests/cases/conformance/es6/computedProperties/computedPropertyNamesContextualType8_ES5.ts (2 errors) ====
     interface I {
         [s: string]: boolean;
         [s: number]: boolean;
     }
     
     var o: I = {
-        ~
-!!! error TS2322: Type '{ [x: string]: string | number; }' is not assignable to type 'I'.
-!!! error TS2322:   Index signatures are incompatible.
-!!! error TS2322:     Type 'string | number' is not assignable to type 'boolean'.
-!!! error TS2322:       Type 'string' is not assignable to type 'boolean'.
         [""+"foo"]: "",
+        ~~~~~~~~~~
+!!! error TS2418: Type of computed property's value is 'string', which is not assignable to type 'boolean'.
+!!! related TS6501 tests/cases/conformance/es6/computedProperties/computedPropertyNamesContextualType8_ES5.ts:2:5: The expected type comes from this index signature.
         [""+"bar"]: 0
+        ~~~~~~~~~~
+!!! error TS2418: Type of computed property's value is 'number', which is not assignable to type 'boolean'.
+!!! related TS6501 tests/cases/conformance/es6/computedProperties/computedPropertyNamesContextualType8_ES5.ts:2:5: The expected type comes from this index signature.
     }

tests/baselines/reference/computedPropertyNamesContextualType8_ES6.errors.txt

@@ -1,21 +1,20 @@
-tests/cases/conformance/es6/computedProperties/computedPropertyNamesContextualType8_ES6.ts(6,5): error TS2322: Type '{ [x: string]: string | number; }' is not assignable to type 'I'.
-  Index signatures are incompatible.
-    Type 'string | number' is not assignable to type 'boolean'.
-      Type 'string' is not assignable to type 'boolean'.
+tests/cases/conformance/es6/computedProperties/computedPropertyNamesContextualType8_ES6.ts(7,5): error TS2418: Type of computed property's value is 'string', which is not assignable to type 'boolean'.
+tests/cases/conformance/es6/computedProperties/computedPropertyNamesContextualType8_ES6.ts(8,5): error TS2418: Type of computed property's value is 'number', which is not assignable to type 'boolean'.
 
 
-==== tests/cases/conformance/es6/computedProperties/computedPropertyNamesContextualType8_ES6.ts (1 errors) ====
+==== tests/cases/conformance/es6/computedProperties/computedPropertyNamesContextualType8_ES6.ts (2 errors) ====
     interface I {
         [s: string]: boolean;
         [s: number]: boolean;
     }
     
     var o: I = {
-        ~
-!!! error TS2322: Type '{ [x: string]: string | number; }' is not assignable to type 'I'.
-!!! error TS2322:   Index signatures are incompatible.
-!!! error TS2322:     Type 'string | number' is not assignable to type 'boolean'.
-!!! error TS2322:       Type 'string' is not assignable to type 'boolean'.
         [""+"foo"]: "",
+        ~~~~~~~~~~
+!!! error TS2418: Type of computed property's value is 'string', which is not assignable to type 'boolean'.
+!!! related TS6501 tests/cases/conformance/es6/computedProperties/computedPropertyNamesContextualType8_ES6.ts:2:5: The expected type comes from this index signature.
         [""+"bar"]: 0
+        ~~~~~~~~~~
+!!! error TS2418: Type of computed property's value is 'number', which is not assignable to type 'boolean'.
+!!! related TS6501 tests/cases/conformance/es6/computedProperties/computedPropertyNamesContextualType8_ES6.ts:2:5: The expected type comes from this index signature.
     }

tests/baselines/reference/constructorWithAssignableReturnExpression.errors.txt

@@ -1,9 +1,7 @@
 tests/cases/conformance/classes/constructorDeclarations/constructorWithAssignableReturnExpression.ts(12,9): error TS2322: Type '1' is not assignable to type 'D'.
 tests/cases/conformance/classes/constructorDeclarations/constructorWithAssignableReturnExpression.ts(12,9): error TS2409: Return type of constructor signature must be assignable to the instance type of the class.
-tests/cases/conformance/classes/constructorDeclarations/constructorWithAssignableReturnExpression.ts(26,9): error TS2322: Type '{ x: number; }' is not assignable to type 'F<T>'.
-  Types of property 'x' are incompatible.
-    Type 'number' is not assignable to type 'T'.
 tests/cases/conformance/classes/constructorDeclarations/constructorWithAssignableReturnExpression.ts(26,9): error TS2409: Return type of constructor signature must be assignable to the instance type of the class.
+tests/cases/conformance/classes/constructorDeclarations/constructorWithAssignableReturnExpression.ts(26,18): error TS2322: Type 'number' is not assignable to type 'T'.
 
 
 ==== tests/cases/conformance/classes/constructorDeclarations/constructorWithAssignableReturnExpression.ts (4 errors) ====
@@ -38,11 +36,10 @@ tests/cases/conformance/classes/constructorDeclarations/constructorWithAssignabl
         constructor() {
             return { x: 1 }; // error
             ~~~~~~~~~~~~~~~~
-!!! error TS2322: Type '{ x: number; }' is not assignable to type 'F<T>'.
-!!! error TS2322:   Types of property 'x' are incompatible.
-!!! error TS2322:     Type 'number' is not assignable to type 'T'.
-            ~~~~~~~~~~~~~~~~
 !!! error TS2409: Return type of constructor signature must be assignable to the instance type of the class.
+                     ~
+!!! error TS2322: Type 'number' is not assignable to type 'T'.
+!!! related TS6500 tests/cases/conformance/classes/constructorDeclarations/constructorWithAssignableReturnExpression.ts:24:5: The expected type comes from property 'x' which is declared here on type 'F<T>'
         }
     }
     

tests/baselines/reference/contextualTypeAny.errors.txt

@@ -1,15 +1,12 @@
-tests/cases/compiler/contextualTypeAny.ts(3,5): error TS2322: Type '{ p: string; q: any; }' is not assignable to type '{ [s: string]: number; }'.
-  Property 'p' is incompatible with index signature.
-    Type 'string' is not assignable to type 'number'.
+tests/cases/compiler/contextualTypeAny.ts(3,38): error TS2322: Type 'string' is not assignable to type 'number'.
 
 
 ==== tests/cases/compiler/contextualTypeAny.ts (1 errors) ====
     var x: any;
     
     var obj: { [s: string]: number } = { p: "", q: x };
-        ~~~
-!!! error TS2322: Type '{ p: string; q: any; }' is not assignable to type '{ [s: string]: number; }'.
-!!! error TS2322:   Property 'p' is incompatible with index signature.
-!!! error TS2322:     Type 'string' is not assignable to type 'number'.
+                                         ~
+!!! error TS2322: Type 'string' is not assignable to type 'number'.
+!!! related TS6501 tests/cases/compiler/contextualTypeAny.ts:3:12: The expected type comes from this index signature.
     
     var arr: number[] = ["", x];

tests/baselines/reference/contextualTypeWithTuple.errors.txt

@@ -2,9 +2,8 @@ tests/cases/conformance/types/tuple/contextualTypeWithTuple.ts(3,5): error TS232
   Types of property 'length' are incompatible.
     Type '3' is not assignable to type '2'.
 tests/cases/conformance/types/tuple/contextualTypeWithTuple.ts(15,1): error TS2322: Type '[number, string, boolean]' is not assignable to type '[number, string]'.
-tests/cases/conformance/types/tuple/contextualTypeWithTuple.ts(18,1): error TS2322: Type '[{}, number]' is not assignable to type '[{ a: string; }, number]'.
-  Type '{}' is not assignable to type '{ a: string; }'.
-    Property 'a' is missing in type '{}'.
+tests/cases/conformance/types/tuple/contextualTypeWithTuple.ts(18,17): error TS2322: Type '{}' is not assignable to type '{ a: string; }'.
+  Property 'a' is missing in type '{}'.
 tests/cases/conformance/types/tuple/contextualTypeWithTuple.ts(19,1): error TS2322: Type '[number, string]' is not assignable to type '[number, string, boolean]'.
   Property '2' is missing in type '[number, string]'.
 tests/cases/conformance/types/tuple/contextualTypeWithTuple.ts(20,5): error TS2322: Type '[string, string, number]' is not assignable to type '[string, string]'.
@@ -45,10 +44,9 @@ tests/cases/conformance/types/tuple/contextualTypeWithTuple.ts(25,1): error TS23
     
     // error
     objNumTuple = [ {}, 5];
-    ~~~~~~~~~~~
-!!! error TS2322: Type '[{}, number]' is not assignable to type '[{ a: string; }, number]'.
-!!! error TS2322:   Type '{}' is not assignable to type '{ a: string; }'.
-!!! error TS2322:     Property 'a' is missing in type '{}'.
+                    ~~
+!!! error TS2322: Type '{}' is not assignable to type '{ a: string; }'.
+!!! error TS2322:   Property 'a' is missing in type '{}'.
     numStrBoolTuple = numStrTuple;
     ~~~~~~~~~~~~~~~
 !!! error TS2322: Type '[number, string]' is not assignable to type '[number, string, boolean]'.

tests/baselines/reference/contextualTypeWithUnionTypeObjectLiteral.errors.txt

@@ -21,12 +21,10 @@ tests/cases/conformance/types/union/contextualTypeWithUnionTypeObjectLiteral.ts(
     Types of property 'prop' are incompatible.
       Type 'string | number' is not assignable to type 'number'.
         Type 'string' is not assignable to type 'number'.
-tests/cases/conformance/types/union/contextualTypeWithUnionTypeObjectLiteral.ts(57,5): error TS2322: Type '{ commonMethodDifferentReturnType: (a: string, b: number) => string | number; }' is not assignable to type 'I11 | I21'.
-  Type '{ commonMethodDifferentReturnType: (a: string, b: number) => string | number; }' is not assignable to type 'I21'.
-    Types of property 'commonMethodDifferentReturnType' are incompatible.
-      Type '(a: string, b: number) => string | number' is not assignable to type '(a: string, b: number) => number'.
-        Type 'string | number' is not assignable to type 'number'.
-          Type 'string' is not assignable to type 'number'.
+tests/cases/conformance/types/union/contextualTypeWithUnionTypeObjectLiteral.ts(58,5): error TS2322: Type '(a: string, b: number) => string | number' is not assignable to type '((a: string, b: number) => string) | ((a: string, b: number) => number)'.
+  Type '(a: string, b: number) => string | number' is not assignable to type '(a: string, b: number) => number'.
+    Type 'string | number' is not assignable to type 'number'.
+      Type 'string' is not assignable to type 'number'.
 
 
 ==== tests/cases/conformance/types/union/contextualTypeWithUnionTypeObjectLiteral.ts (6 errors) ====
@@ -115,12 +113,11 @@ tests/cases/conformance/types/union/contextualTypeWithUnionTypeObjectLiteral.ts(
     };
     var strOrNumber: string | number;
     var i11Ori21: I11 | I21 = { // Like i1 and i2 both
-        ~~~~~~~~
-!!! error TS2322: Type '{ commonMethodDifferentReturnType: (a: string, b: number) => string | number; }' is not assignable to type 'I11 | I21'.
-!!! error TS2322:   Type '{ commonMethodDifferentReturnType: (a: string, b: number) => string | number; }' is not assignable to type 'I21'.
-!!! error TS2322:     Types of property 'commonMethodDifferentReturnType' are incompatible.
-!!! error TS2322:       Type '(a: string, b: number) => string | number' is not assignable to type '(a: string, b: number) => number'.
-!!! error TS2322:         Type 'string | number' is not assignable to type 'number'.
-!!! error TS2322:           Type 'string' is not assignable to type 'number'.
         commonMethodDifferentReturnType: (a, b) => strOrNumber,
+        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+!!! error TS2322: Type '(a: string, b: number) => string | number' is not assignable to type '((a: string, b: number) => string) | ((a: string, b: number) => number)'.
+!!! error TS2322:   Type '(a: string, b: number) => string | number' is not assignable to type '(a: string, b: number) => number'.
+!!! error TS2322:     Type 'string | number' is not assignable to type 'number'.
+!!! error TS2322:       Type 'string' is not assignable to type 'number'.
+!!! related TS6500 tests/cases/conformance/types/union/contextualTypeWithUnionTypeObjectLiteral.ts:35:5: The expected type comes from property 'commonMethodDifferentReturnType' which is declared here on type 'I11 | I21'
     };

tests/baselines/reference/contextuallyTypedBindingInitializerNegative.errors.txt

@@ -4,14 +4,11 @@ tests/cases/conformance/types/contextualTypes/methodDeclarations/contextuallyTyp
   Type 'number' is not assignable to type 'string'.
 tests/cases/conformance/types/contextualTypes/methodDeclarations/contextuallyTypedBindingInitializerNegative.ts(6,25): error TS2322: Type '(v: number) => number' is not assignable to type '(x: number) => string'.
   Type 'number' is not assignable to type 'string'.
-tests/cases/conformance/types/contextualTypes/methodDeclarations/contextuallyTypedBindingInitializerNegative.ts(11,23): error TS2322: Type '{ show: (v: number) => number; }' is not assignable to type 'Show'.
-  Types of property 'show' are incompatible.
-    Type '(v: number) => number' is not assignable to type '(x: number) => string'.
-      Type 'number' is not assignable to type 'string'.
+tests/cases/conformance/types/contextualTypes/methodDeclarations/contextuallyTypedBindingInitializerNegative.ts(11,40): error TS2322: Type '(v: number) => number' is not assignable to type '(x: number) => string'.
+  Type 'number' is not assignable to type 'string'.
 tests/cases/conformance/types/contextualTypes/methodDeclarations/contextuallyTypedBindingInitializerNegative.ts(16,23): error TS2322: Type '(arg: string) => number' is not assignable to type '(s: string) => string'.
   Type 'number' is not assignable to type 'string'.
-tests/cases/conformance/types/contextualTypes/methodDeclarations/contextuallyTypedBindingInitializerNegative.ts(21,14): error TS2322: Type '[number, number]' is not assignable to type '[string, number]'.
-  Type 'number' is not assignable to type 'string'.
+tests/cases/conformance/types/contextualTypes/methodDeclarations/contextuallyTypedBindingInitializerNegative.ts(21,22): error TS2322: Type 'number' is not assignable to type 'string'.
 tests/cases/conformance/types/contextualTypes/methodDeclarations/contextuallyTypedBindingInitializerNegative.ts(26,14): error TS2322: Type '"baz"' is not assignable to type '"foo" | "bar"'.
 
 
@@ -36,11 +33,10 @@ tests/cases/conformance/types/contextualTypes/methodDeclarations/contextuallyTyp
         nested: Show
     }
     function ff({ nested: nestedRename = { show: v => v } }: Nested) {}
-                          ~~~~~~~~~~~~
-!!! error TS2322: Type '{ show: (v: number) => number; }' is not assignable to type 'Show'.
-!!! error TS2322:   Types of property 'show' are incompatible.
-!!! error TS2322:     Type '(v: number) => number' is not assignable to type '(x: number) => string'.
-!!! error TS2322:       Type 'number' is not assignable to type 'string'.
+                                           ~~~~
+!!! error TS2322: Type '(v: number) => number' is not assignable to type '(x: number) => string'.
+!!! error TS2322:   Type 'number' is not assignable to type 'string'.
+!!! related TS6500 tests/cases/conformance/types/contextualTypes/methodDeclarations/contextuallyTypedBindingInitializerNegative.ts:2:5: The expected type comes from property 'show' which is declared here on type 'Show'
     
     interface StringIdentity {
         stringIdentity(s: string): string;
@@ -54,9 +50,8 @@ tests/cases/conformance/types/contextualTypes/methodDeclarations/contextuallyTyp
         prop: [string, number];
     }
     function g({ prop = [101, 1234] }: Tuples) {}
-                 ~~~~
-!!! error TS2322: Type '[number, number]' is not assignable to type '[string, number]'.
-!!! error TS2322:   Type 'number' is not assignable to type 'string'.
+                         ~~~
+!!! error TS2322: Type 'number' is not assignable to type 'string'.
     
     interface StringUnion {
         prop: "foo" | "bar";

tests/baselines/reference/contextuallyTypedStringLiteralsInJsxAttributes01.errors.txt

@@ -1,7 +1,5 @@
-tests/cases/conformance/types/contextualTypes/jsxAttributes/contextuallyTypedStringLiteralsInJsxAttributes01.tsx(15,15): error TS2326: Types of property 'foo' are incompatible.
-  Type '"f"' is not assignable to type '"A" | "B" | "C"'.
-tests/cases/conformance/types/contextualTypes/jsxAttributes/contextuallyTypedStringLiteralsInJsxAttributes01.tsx(16,15): error TS2326: Types of property 'foo' are incompatible.
-  Type '"f"' is not assignable to type '"A" | "B" | "C"'.
+tests/cases/conformance/types/contextualTypes/jsxAttributes/contextuallyTypedStringLiteralsInJsxAttributes01.tsx(15,15): error TS2322: Type '"f"' is not assignable to type '"A" | "B" | "C"'.
+tests/cases/conformance/types/contextualTypes/jsxAttributes/contextuallyTypedStringLiteralsInJsxAttributes01.tsx(16,15): error TS2322: Type '"f"' is not assignable to type '"A" | "B" | "C"'.
 
 
 ==== tests/cases/conformance/types/contextualTypes/jsxAttributes/contextuallyTypedStringLiteralsInJsxAttributes01.tsx (2 errors) ====
@@ -20,10 +18,10 @@ tests/cases/conformance/types/contextualTypes/jsxAttributes/contextuallyTypedStr
     <FooComponent foo="A"   />;
     
     <FooComponent foo={"f"} />;
-                  ~~~~~~~~~
-!!! error TS2326: Types of property 'foo' are incompatible.
-!!! error TS2326:   Type '"f"' is not assignable to type '"A" | "B" | "C"'.
+                  ~~~
+!!! error TS2322: Type '"f"' is not assignable to type '"A" | "B" | "C"'.
+!!! related TS6500 tests/cases/conformance/types/contextualTypes/jsxAttributes/contextuallyTypedStringLiteralsInJsxAttributes01.tsx:10:32: The expected type comes from property 'foo' which is declared here on type '{ foo: "A" | "B" | "C"; }'
     <FooComponent foo="f"   />;
-                  ~~~~~~~
-!!! error TS2326: Types of property 'foo' are incompatible.
-!!! error TS2326:   Type '"f"' is not assignable to type '"A" | "B" | "C"'.
+                  ~~~
+!!! error TS2322: Type '"f"' is not assignable to type '"A" | "B" | "C"'.
+!!! related TS6500 tests/cases/conformance/types/contextualTypes/jsxAttributes/contextuallyTypedStringLiteralsInJsxAttributes01.tsx:10:32: The expected type comes from property 'foo' which is declared here on type '{ foo: "A" | "B" | "C"; }'

tests/baselines/reference/deeplyNestedAssignabilityIssue.errors.txt

@@ -0,0 +1,61 @@
+tests/cases/compiler/deeplyNestedAssignabilityIssue.ts:22:17 - error TS2322: Type '{}' is not assignable to type 'A'.
+  Property 'a' is missing in type '{}'.
+
+22                 thing: {}
+                   ~~~~~
+
+  tests/cases/compiler/deeplyNestedAssignabilityIssue.ts:9:17
+    9                 thing: A;
+                      ~~~~~
+    The expected type comes from property 'thing' which is declared here on type '{ thing: A; }'
+tests/cases/compiler/deeplyNestedAssignabilityIssue.ts:25:17 - error TS2322: Type '{}' is not assignable to type 'A'.
+  Property 'a' is missing in type '{}'.
+
+25                 another: {}
+                   ~~~~~~~
+
+  tests/cases/compiler/deeplyNestedAssignabilityIssue.ts:12:17
+    12                 another: A;
+                       ~~~~~~~
+    The expected type comes from property 'another' which is declared here on type '{ another: A; }'
+
+
+==== tests/cases/compiler/deeplyNestedAssignabilityIssue.ts (2 errors) ====
+    interface A {
+        a: number;
+    }
+    
+    interface Large {
+        something: {
+            another: {
+                more: {
+                    thing: A;
+                }
+                yetstill: {
+                    another: A;
+                }
+            }
+        }
+    }
+    
+    const x: Large = {
+        something: {
+            another: {
+                more: {
+                    thing: {}
+                    ~~~~~
+!!! error TS2322: Type '{}' is not assignable to type 'A'.
+!!! error TS2322:   Property 'a' is missing in type '{}'.
+!!! related TS6500 tests/cases/compiler/deeplyNestedAssignabilityIssue.ts:9:17: The expected type comes from property 'thing' which is declared here on type '{ thing: A; }'
+                },
+                yetstill: {
+                    another: {}
+                    ~~~~~~~
+!!! error TS2322: Type '{}' is not assignable to type 'A'.
+!!! error TS2322:   Property 'a' is missing in type '{}'.
+!!! related TS6500 tests/cases/compiler/deeplyNestedAssignabilityIssue.ts:12:17: The expected type comes from property 'another' which is declared here on type '{ another: A; }'
+                }
+            }
+        }
+    }
+    

tests/baselines/reference/deeplyNestedAssignabilityIssue.js

@@ -0,0 +1,45 @@
+//// [deeplyNestedAssignabilityIssue.ts]
+interface A {
+    a: number;
+}
+
+interface Large {
+    something: {
+        another: {
+            more: {
+                thing: A;
+            }
+            yetstill: {
+                another: A;
+            }
+        }
+    }
+}
+
+const x: Large = {
+    something: {
+        another: {
+            more: {
+                thing: {}
+            },
+            yetstill: {
+                another: {}
+            }
+        }
+    }
+}
+
+
+//// [deeplyNestedAssignabilityIssue.js]
+var x = {
+    something: {
+        another: {
+            more: {
+                thing: {}
+            },
+            yetstill: {
+                another: {}
+            }
+        }
+    }
+};

tests/baselines/reference/deeplyNestedAssignabilityIssue.symbols

@@ -0,0 +1,62 @@
+=== tests/cases/compiler/deeplyNestedAssignabilityIssue.ts ===
+interface A {
+>A : Symbol(A, Decl(deeplyNestedAssignabilityIssue.ts, 0, 0))
+
+    a: number;
+>a : Symbol(A.a, Decl(deeplyNestedAssignabilityIssue.ts, 0, 13))
+}
+
+interface Large {
+>Large : Symbol(Large, Decl(deeplyNestedAssignabilityIssue.ts, 2, 1))
+
+    something: {
+>something : Symbol(Large.something, Decl(deeplyNestedAssignabilityIssue.ts, 4, 17))
+
+        another: {
+>another : Symbol(another, Decl(deeplyNestedAssignabilityIssue.ts, 5, 16))
+
+            more: {
+>more : Symbol(more, Decl(deeplyNestedAssignabilityIssue.ts, 6, 18))
+
+                thing: A;
+>thing : Symbol(thing, Decl(deeplyNestedAssignabilityIssue.ts, 7, 19))
+>A : Symbol(A, Decl(deeplyNestedAssignabilityIssue.ts, 0, 0))
+            }
+            yetstill: {
+>yetstill : Symbol(yetstill, Decl(deeplyNestedAssignabilityIssue.ts, 9, 13))
+
+                another: A;
+>another : Symbol(another, Decl(deeplyNestedAssignabilityIssue.ts, 10, 23))
+>A : Symbol(A, Decl(deeplyNestedAssignabilityIssue.ts, 0, 0))
+            }
+        }
+    }
+}
+
+const x: Large = {
+>x : Symbol(x, Decl(deeplyNestedAssignabilityIssue.ts, 17, 5))
+>Large : Symbol(Large, Decl(deeplyNestedAssignabilityIssue.ts, 2, 1))
+
+    something: {
+>something : Symbol(something, Decl(deeplyNestedAssignabilityIssue.ts, 17, 18))
+
+        another: {
+>another : Symbol(another, Decl(deeplyNestedAssignabilityIssue.ts, 18, 16))
+
+            more: {
+>more : Symbol(more, Decl(deeplyNestedAssignabilityIssue.ts, 19, 18))
+
+                thing: {}
+>thing : Symbol(thing, Decl(deeplyNestedAssignabilityIssue.ts, 20, 19))
+
+            },
+            yetstill: {
+>yetstill : Symbol(yetstill, Decl(deeplyNestedAssignabilityIssue.ts, 22, 14))
+
+                another: {}
+>another : Symbol(another, Decl(deeplyNestedAssignabilityIssue.ts, 23, 23))
+            }
+        }
+    }
+}
+

tests/baselines/reference/deeplyNestedAssignabilityIssue.types

@@ -0,0 +1,69 @@
+=== tests/cases/compiler/deeplyNestedAssignabilityIssue.ts ===
+interface A {
+>A : A
+
+    a: number;
+>a : number
+}
+
+interface Large {
+>Large : Large
+
+    something: {
+>something : { another: { more: { thing: A; }; yetstill: { another: A; }; }; }
+
+        another: {
+>another : { more: { thing: A; }; yetstill: { another: A; }; }
+
+            more: {
+>more : { thing: A; }
+
+                thing: A;
+>thing : A
+>A : A
+            }
+            yetstill: {
+>yetstill : { another: A; }
+
+                another: A;
+>another : A
+>A : A
+            }
+        }
+    }
+}
+
+const x: Large = {
+>x : Large
+>Large : Large
+>{    something: {        another: {            more: {                thing: {}            },            yetstill: {                another: {}            }        }    }} : { something: { another: { more: { thing: {}; }; yetstill: { another: {}; }; }; }; }
+
+    something: {
+>something : { another: { more: { thing: {}; }; yetstill: { another: {}; }; }; }
+>{        another: {            more: {                thing: {}            },            yetstill: {                another: {}            }        }    } : { another: { more: { thing: {}; }; yetstill: { another: {}; }; }; }
+
+        another: {
+>another : { more: { thing: {}; }; yetstill: { another: {}; }; }
+>{            more: {                thing: {}            },            yetstill: {                another: {}            }        } : { more: { thing: {}; }; yetstill: { another: {}; }; }
+
+            more: {
+>more : { thing: {}; }
+>{                thing: {}            } : { thing: {}; }
+
+                thing: {}
+>thing : {}
+>{} : {}
+
+            },
+            yetstill: {
+>yetstill : { another: {}; }
+>{                another: {}            } : { another: {}; }
+
+                another: {}
+>another : {}
+>{} : {}
+            }
+        }
+    }
+}
+

tests/baselines/reference/destructuringArrayBindingPatternAndAssignment2.errors.txt

@@ -3,8 +3,7 @@ tests/cases/conformance/es6/destructuring/destructuringArrayBindingPatternAndAss
 tests/cases/conformance/es6/destructuring/destructuringArrayBindingPatternAndAssignment2.ts(3,12): error TS2461: Type 'undefined' is not an array type.
 tests/cases/conformance/es6/destructuring/destructuringArrayBindingPatternAndAssignment2.ts(3,12): error TS2525: Initializer provides no value for this binding element and the binding element has no default value.
 tests/cases/conformance/es6/destructuring/destructuringArrayBindingPatternAndAssignment2.ts(4,5): error TS2461: Type 'undefined' is not an array type.
-tests/cases/conformance/es6/destructuring/destructuringArrayBindingPatternAndAssignment2.ts(9,5): error TS2322: Type '[number, number, string]' is not assignable to type '[number, boolean, string]'.
-  Type 'number' is not assignable to type 'boolean'.
+tests/cases/conformance/es6/destructuring/destructuringArrayBindingPatternAndAssignment2.ts(9,51): error TS2322: Type 'number' is not assignable to type 'boolean'.
 tests/cases/conformance/es6/destructuring/destructuringArrayBindingPatternAndAssignment2.ts(22,5): error TS2322: Type 'number[]' is not assignable to type '[number, number]'.
   Property '0' is missing in type 'number[]'.
 tests/cases/conformance/es6/destructuring/destructuringArrayBindingPatternAndAssignment2.ts(23,5): error TS2322: Type 'number[]' is not assignable to type '[string, string]'.
@@ -32,9 +31,8 @@ tests/cases/conformance/es6/destructuring/destructuringArrayBindingPatternAndAss
     //      S is a tuple- like type (section 3.3.3) with a property named N of a type that is assignable to the target given in E,
     //        where N is the numeric index of E in the array assignment pattern, or
     var [b0, b1, b2]: [number, boolean, string] = [1, 2, "string"];  // Error
-        ~~~~~~~~~~~~
-!!! error TS2322: Type '[number, number, string]' is not assignable to type '[number, boolean, string]'.
-!!! error TS2322:   Type 'number' is not assignable to type 'boolean'.
+                                                      ~
+!!! error TS2322: Type 'number' is not assignable to type 'boolean'.
     interface J extends Array<Number> {
         2: number;
     }

tests/baselines/reference/destructuringVariableDeclaration2.errors.txt

@@ -1,28 +1,23 @@
-tests/cases/conformance/es6/destructuring/destructuringVariableDeclaration2.ts(3,5): error TS2322: Type '{ a1: boolean; a2: number; }' is not assignable to type '{ a1: number; a2: string; }'.
-  Types of property 'a1' are incompatible.
-    Type 'boolean' is not assignable to type 'number'.
-tests/cases/conformance/es6/destructuring/destructuringVariableDeclaration2.ts(4,5): error TS2322: Type '[number, [[boolean]], true]' is not assignable to type '[number, [[string]], boolean]'.
-  Type '[[boolean]]' is not assignable to type '[[string]]'.
-    Type '[boolean]' is not assignable to type '[string]'.
-      Type 'boolean' is not assignable to type 'string'.
+tests/cases/conformance/es6/destructuring/destructuringVariableDeclaration2.ts(3,46): error TS2322: Type 'true' is not assignable to type 'number'.
+tests/cases/conformance/es6/destructuring/destructuringVariableDeclaration2.ts(3,56): error TS2322: Type 'number' is not assignable to type 'string'.
+tests/cases/conformance/es6/destructuring/destructuringVariableDeclaration2.ts(4,61): error TS2322: Type 'false' is not assignable to type 'string'.
 tests/cases/conformance/es6/destructuring/destructuringVariableDeclaration2.ts(19,10): error TS2322: Type 'string[]' is not assignable to type 'number[]'.
   Type 'string' is not assignable to type 'number'.
 
 
-==== tests/cases/conformance/es6/destructuring/destructuringVariableDeclaration2.ts (3 errors) ====
+==== tests/cases/conformance/es6/destructuring/destructuringVariableDeclaration2.ts (4 errors) ====
     // The type T associated with a destructuring variable declaration is determined as follows:
     //      If the declaration includes a type annotation, T is that type.
     var {a1, a2}: { a1: number, a2: string } = { a1: true, a2: 1 }               // Error
-        ~~~~~~~~
-!!! error TS2322: Type '{ a1: boolean; a2: number; }' is not assignable to type '{ a1: number; a2: string; }'.
-!!! error TS2322:   Types of property 'a1' are incompatible.
-!!! error TS2322:     Type 'boolean' is not assignable to type 'number'.
+                                                 ~~
+!!! error TS2322: Type 'true' is not assignable to type 'number'.
+!!! related TS6500 tests/cases/conformance/es6/destructuring/destructuringVariableDeclaration2.ts:3:17: The expected type comes from property 'a1' which is declared here on type '{ a1: number; a2: string; }'
+                                                           ~~
+!!! error TS2322: Type 'number' is not assignable to type 'string'.
+!!! related TS6500 tests/cases/conformance/es6/destructuring/destructuringVariableDeclaration2.ts:3:29: The expected type comes from property 'a2' which is declared here on type '{ a1: number; a2: string; }'
     var [a3, [[a4]], a5]: [number, [[string]], boolean] = [1, [[false]], true];  // Error
-        ~~~~~~~~~~~~~~~~
-!!! error TS2322: Type '[number, [[boolean]], true]' is not assignable to type '[number, [[string]], boolean]'.
-!!! error TS2322:   Type '[[boolean]]' is not assignable to type '[[string]]'.
-!!! error TS2322:     Type '[boolean]' is not assignable to type '[string]'.
-!!! error TS2322:       Type 'boolean' is not assignable to type 'string'.
+                                                                ~~~~~
+!!! error TS2322: Type 'false' is not assignable to type 'string'.
     
     // The type T associated with a destructuring variable declaration is determined as follows:
     //      Otherwise, if the declaration includes an initializer expression, T is the type of that initializer expression.

tests/baselines/reference/everyTypeWithAnnotationAndInvalidInitializer.errors.txt

@@ -8,9 +8,7 @@ tests/cases/conformance/statements/VariableStatements/everyTypeWithAnnotationAnd
   Property 'id' is missing in type 'D<{}>'.
 tests/cases/conformance/statements/VariableStatements/everyTypeWithAnnotationAndInvalidInitializer.ts(42,5): error TS2322: Type 'C' is not assignable to type 'D<string>'.
   Property 'source' is missing in type 'C'.
-tests/cases/conformance/statements/VariableStatements/everyTypeWithAnnotationAndInvalidInitializer.ts(43,5): error TS2322: Type '{ id: string; }' is not assignable to type 'I'.
-  Types of property 'id' are incompatible.
-    Type 'string' is not assignable to type 'number'.
+tests/cases/conformance/statements/VariableStatements/everyTypeWithAnnotationAndInvalidInitializer.ts(43,28): error TS2322: Type 'string' is not assignable to type 'number'.
 tests/cases/conformance/statements/VariableStatements/everyTypeWithAnnotationAndInvalidInitializer.ts(44,5): error TS2322: Type 'C' is not assignable to type '{ id: string; }'.
   Types of property 'id' are incompatible.
     Type 'number' is not assignable to type 'string'.
@@ -93,10 +91,9 @@ tests/cases/conformance/statements/VariableStatements/everyTypeWithAnnotationAnd
 !!! error TS2322: Type 'C' is not assignable to type 'D<string>'.
 !!! error TS2322:   Property 'source' is missing in type 'C'.
     var anObjectLiteral: I = { id: 'a string' };
-        ~~~~~~~~~~~~~~~
-!!! error TS2322: Type '{ id: string; }' is not assignable to type 'I'.
-!!! error TS2322:   Types of property 'id' are incompatible.
-!!! error TS2322:     Type 'string' is not assignable to type 'number'.
+                               ~~
+!!! error TS2322: Type 'string' is not assignable to type 'number'.
+!!! related TS6500 tests/cases/conformance/statements/VariableStatements/everyTypeWithAnnotationAndInvalidInitializer.ts:2:5: The expected type comes from property 'id' which is declared here on type 'I'
     var anOtherObjectLiteral: { id: string } = new C();
         ~~~~~~~~~~~~~~~~~~~~
 !!! error TS2322: Type 'C' is not assignable to type '{ id: string; }'.

tests/baselines/reference/fuzzy.errors.txt

@@ -1,9 +1,7 @@
 tests/cases/compiler/fuzzy.ts(13,18): error TS2420: Class 'C' incorrectly implements interface 'I'.
   Property 'alsoWorks' is missing in type 'C'.
-tests/cases/compiler/fuzzy.ts(21,13): error TS2322: Type '{ anything: number; oneI: this; }' is not assignable to type 'R'.
-  Types of property 'oneI' are incompatible.
-    Type 'this' is not assignable to type 'I'.
-      Type 'C' is not assignable to type 'I'.
+tests/cases/compiler/fuzzy.ts(21,34): error TS2322: Type 'this' is not assignable to type 'I'.
+  Type 'C' is not assignable to type 'I'.
 tests/cases/compiler/fuzzy.ts(25,20): error TS2352: Type '{ oneI: this; }' cannot be converted to type 'R'.
   Property 'anything' is missing in type '{ oneI: this; }'.
 
@@ -33,11 +31,10 @@ tests/cases/compiler/fuzzy.ts(25,20): error TS2352: Type '{ oneI: this; }' canno
     
             doesntWork():R {
                 return { anything:1, oneI:this };
-                ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS2322: Type '{ anything: number; oneI: this; }' is not assignable to type 'R'.
-!!! error TS2322:   Types of property 'oneI' are incompatible.
-!!! error TS2322:     Type 'this' is not assignable to type 'I'.
-!!! error TS2322:       Type 'C' is not assignable to type 'I'.
+                                     ~~~~
+!!! error TS2322: Type 'this' is not assignable to type 'I'.
+!!! error TS2322:   Type 'C' is not assignable to type 'I'.
+!!! related TS6500 tests/cases/compiler/fuzzy.ts:10:9: The expected type comes from property 'oneI' which is declared here on type 'R'
             }
     
             worksToo():R {

tests/baselines/reference/genericAssignmentCompatWithInterfaces1.errors.txt

@@ -1,10 +1,8 @@
-tests/cases/compiler/genericAssignmentCompatWithInterfaces1.ts(12,5): error TS2322: Type '{ x: A<number>; }' is not assignable to type 'I<string>'.
-  Types of property 'x' are incompatible.
-    Type 'A<number>' is not assignable to type 'Comparable<string>'.
-      Types of property 'compareTo' are incompatible.
-        Type '(other: number) => number' is not assignable to type '(other: string) => number'.
-          Types of parameters 'other' and 'other' are incompatible.
-            Type 'string' is not assignable to type 'number'.
+tests/cases/compiler/genericAssignmentCompatWithInterfaces1.ts(12,23): error TS2322: Type 'A<number>' is not assignable to type 'Comparable<string>'.
+  Types of property 'compareTo' are incompatible.
+    Type '(other: number) => number' is not assignable to type '(other: string) => number'.
+      Types of parameters 'other' and 'other' are incompatible.
+        Type 'string' is not assignable to type 'number'.
 tests/cases/compiler/genericAssignmentCompatWithInterfaces1.ts(13,5): error TS2322: Type '{ x: A<number>; }' is not assignable to type 'I<string>'.
   Types of property 'x' are incompatible.
     Type 'A<number>' is not assignable to type 'Comparable<string>'.
@@ -29,14 +27,13 @@ tests/cases/compiler/genericAssignmentCompatWithInterfaces1.ts(17,5): error TS23
     class A<T> implements Comparable<T> { compareTo(other: T) { return 1; } }
     var z = { x: new A<number>() };
     var a1: I<string> = { x: new A<number>() };
-        ~~
-!!! error TS2322: Type '{ x: A<number>; }' is not assignable to type 'I<string>'.
-!!! error TS2322:   Types of property 'x' are incompatible.
-!!! error TS2322:     Type 'A<number>' is not assignable to type 'Comparable<string>'.
-!!! error TS2322:       Types of property 'compareTo' are incompatible.
-!!! error TS2322:         Type '(other: number) => number' is not assignable to type '(other: string) => number'.
-!!! error TS2322:           Types of parameters 'other' and 'other' are incompatible.
-!!! error TS2322:             Type 'string' is not assignable to type 'number'.
+                          ~
+!!! error TS2322: Type 'A<number>' is not assignable to type 'Comparable<string>'.
+!!! error TS2322:   Types of property 'compareTo' are incompatible.
+!!! error TS2322:     Type '(other: number) => number' is not assignable to type '(other: string) => number'.
+!!! error TS2322:       Types of parameters 'other' and 'other' are incompatible.
+!!! error TS2322:         Type 'string' is not assignable to type 'number'.
+!!! related TS6500 tests/cases/compiler/genericAssignmentCompatWithInterfaces1.ts:5:5: The expected type comes from property 'x' which is declared here on type 'I<string>'
     var a2: I<string> = function (): { x: A<number> } {
         ~~
 !!! error TS2322: Type '{ x: A<number>; }' is not assignable to type 'I<string>'.

tests/baselines/reference/genericCallWithTupleType.errors.txt

@@ -3,15 +3,15 @@ tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithTup
     Type '4' is not assignable to type '2'.
 tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithTupleType.ts(14,1): error TS2322: Type '{ a: string; }' is not assignable to type 'string | number'.
   Type '{ a: string; }' is not assignable to type 'number'.
-tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithTupleType.ts(22,1): error TS2322: Type '[number, string]' is not assignable to type '[string, number]'.
-  Type 'number' is not assignable to type 'string'.
-tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithTupleType.ts(23,1): error TS2322: Type '[{}, {}]' is not assignable to type '[string, number]'.
-  Type '{}' is not assignable to type 'string'.
+tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithTupleType.ts(22,14): error TS2322: Type 'number' is not assignable to type 'string'.
+tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithTupleType.ts(22,17): error TS2322: Type 'string' is not assignable to type 'number'.
+tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithTupleType.ts(23,14): error TS2322: Type '{}' is not assignable to type 'string'.
+tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithTupleType.ts(23,18): error TS2322: Type '{}' is not assignable to type 'number'.
 tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithTupleType.ts(24,1): error TS2322: Type '[{}]' is not assignable to type '[{}, {}]'.
   Property '1' is missing in type '[{}]'.
 
 
-==== tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithTupleType.ts (5 errors) ====
+==== tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithTupleType.ts (7 errors) ====
     interface I<T, U> {
         tuple1: [T, U];
     } 
@@ -41,13 +41,15 @@ tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithTup
     
     // error
     i1.tuple1 = [5, "foo"];
-    ~~~~~~~~~
-!!! error TS2322: Type '[number, string]' is not assignable to type '[string, number]'.
-!!! error TS2322:   Type 'number' is not assignable to type 'string'.
+                 ~
+!!! error TS2322: Type 'number' is not assignable to type 'string'.
+                    ~~~~~
+!!! error TS2322: Type 'string' is not assignable to type 'number'.
     i1.tuple1 = [{}, {}];
-    ~~~~~~~~~
-!!! error TS2322: Type '[{}, {}]' is not assignable to type '[string, number]'.
-!!! error TS2322:   Type '{}' is not assignable to type 'string'.
+                 ~~
+!!! error TS2322: Type '{}' is not assignable to type 'string'.
+                     ~~
+!!! error TS2322: Type '{}' is not assignable to type 'number'.
     i2.tuple1 = [{}];
     ~~~~~~~~~
 !!! error TS2322: Type '[{}]' is not assignable to type '[{}, {}]'.

tests/baselines/reference/jsxChildrenGenericContextualTypes.errors.txt

@@ -1,6 +1,5 @@
-tests/cases/compiler/jsxChildrenGenericContextualTypes.tsx(20,31): error TS2326: Types of property 'children' are incompatible.
-  Type '(p: IntrinsicAttributes & LitProps<"x">) => "y"' is not assignable to type '(x: IntrinsicAttributes & LitProps<"x">) => "x"'.
-    Type '"y"' is not assignable to type '"x"'.
+tests/cases/compiler/jsxChildrenGenericContextualTypes.tsx(20,31): error TS2322: Type '(p: IntrinsicAttributes & LitProps<"x">) => "y"' is not assignable to type '(x: IntrinsicAttributes & LitProps<"x">) => "x"'.
+  Type '"y"' is not assignable to type '"x"'.
 tests/cases/compiler/jsxChildrenGenericContextualTypes.tsx(21,19): error TS2322: Type '{ children: (p: IntrinsicAttributes & LitProps<"x">) => "y"; prop: "x"; }' is not assignable to type 'IntrinsicAttributes & LitProps<"x" | "y">'.
   Type '{ children: (p: IntrinsicAttributes & LitProps<"x">) => "y"; prop: "x"; }' is not assignable to type 'LitProps<"x" | "y">'.
     Types of property 'children' are incompatible.
@@ -39,10 +38,10 @@ tests/cases/compiler/jsxChildrenGenericContextualTypes.tsx(22,21): error TS2322:
     
     // Should error
     const arg = <ElemLit prop="x" children={p => "y"} />
-                                  ~~~~~~~~~~~~~~~~~~~
-!!! error TS2326: Types of property 'children' are incompatible.
-!!! error TS2326:   Type '(p: IntrinsicAttributes & LitProps<"x">) => "y"' is not assignable to type '(x: IntrinsicAttributes & LitProps<"x">) => "x"'.
-!!! error TS2326:     Type '"y"' is not assignable to type '"x"'.
+                                  ~~~~~~~~
+!!! error TS2322: Type '(p: IntrinsicAttributes & LitProps<"x">) => "y"' is not assignable to type '(x: IntrinsicAttributes & LitProps<"x">) => "x"'.
+!!! error TS2322:   Type '"y"' is not assignable to type '"x"'.
+!!! related TS6500 tests/cases/compiler/jsxChildrenGenericContextualTypes.tsx:13:34: The expected type comes from property 'children' which is declared here on type 'IntrinsicAttributes & LitProps<"x">'
     const argchild = <ElemLit prop="x">{p => "y"}</ElemLit>
                       ~~~~~~~
 !!! error TS2322: Type '{ children: (p: IntrinsicAttributes & LitProps<"x">) => "y"; prop: "x"; }' is not assignable to type 'IntrinsicAttributes & LitProps<"x" | "y">'.

tests/baselines/reference/mappedTypeErrors.errors.txt

@@ -37,15 +37,9 @@ tests/cases/conformance/types/mapped/mappedTypeErrors.ts(123,12): error TS2345:
     Type 'undefined' is not assignable to type 'string'.
 tests/cases/conformance/types/mapped/mappedTypeErrors.ts(124,14): error TS2345: Argument of type '{ c: boolean; }' is not assignable to parameter of type 'Pick<Foo, "a" | "b">'.
   Object literal may only specify known properties, and 'c' does not exist in type 'Pick<Foo, "a" | "b">'.
-tests/cases/conformance/types/mapped/mappedTypeErrors.ts(128,5): error TS2322: Type '{ a: string; }' is not assignable to type 'T2'.
-  Types of property 'a' are incompatible.
-    Type 'string' is not assignable to type 'number | undefined'.
-tests/cases/conformance/types/mapped/mappedTypeErrors.ts(129,5): error TS2322: Type '{ a: string; }' is not assignable to type 'Partial<T2>'.
-  Types of property 'a' are incompatible.
-    Type 'string' is not assignable to type 'number | undefined'.
-tests/cases/conformance/types/mapped/mappedTypeErrors.ts(130,5): error TS2322: Type '{ a: string; }' is not assignable to type '{ [x: string]: any; a?: number | undefined; }'.
-  Types of property 'a' are incompatible.
-    Type 'string' is not assignable to type 'number | undefined'.
+tests/cases/conformance/types/mapped/mappedTypeErrors.ts(128,16): error TS2322: Type 'string' is not assignable to type 'number | undefined'.
+tests/cases/conformance/types/mapped/mappedTypeErrors.ts(129,25): error TS2322: Type 'string' is not assignable to type 'number | undefined'.
+tests/cases/conformance/types/mapped/mappedTypeErrors.ts(130,39): error TS2322: Type 'string' is not assignable to type 'number | undefined'.
 tests/cases/conformance/types/mapped/mappedTypeErrors.ts(136,16): error TS2322: Type 'T' is not assignable to type 'string | number | symbol'.
   Type 'T' is not assignable to type 'symbol'.
 tests/cases/conformance/types/mapped/mappedTypeErrors.ts(136,21): error TS2536: Type 'P' cannot be used to index type 'T'.
@@ -239,20 +233,17 @@ tests/cases/conformance/types/mapped/mappedTypeErrors.ts(136,21): error TS2536:
     type T2 = { a?: number, [key: string]: any };
     
     let x1: T2 = { a: 'no' };  // Error
-        ~~
-!!! error TS2322: Type '{ a: string; }' is not assignable to type 'T2'.
-!!! error TS2322:   Types of property 'a' are incompatible.
-!!! error TS2322:     Type 'string' is not assignable to type 'number | undefined'.
+                   ~
+!!! error TS2322: Type 'string' is not assignable to type 'number | undefined'.
+!!! related TS6500 tests/cases/conformance/types/mapped/mappedTypeErrors.ts:126:13: The expected type comes from property 'a' which is declared here on type 'T2'
     let x2: Partial<T2> = { a: 'no' }; // Error
-        ~~
-!!! error TS2322: Type '{ a: string; }' is not assignable to type 'Partial<T2>'.
-!!! error TS2322:   Types of property 'a' are incompatible.
-!!! error TS2322:     Type 'string' is not assignable to type 'number | undefined'.
+                            ~
+!!! error TS2322: Type 'string' is not assignable to type 'number | undefined'.
+!!! related TS6500 tests/cases/conformance/types/mapped/mappedTypeErrors.ts:126:13: The expected type comes from property 'a' which is declared here on type 'Partial<T2>'
     let x3: { [P in keyof T2]: T2[P]} = { a: 'no' };  // Error
-        ~~
-!!! error TS2322: Type '{ a: string; }' is not assignable to type '{ [x: string]: any; a?: number | undefined; }'.
-!!! error TS2322:   Types of property 'a' are incompatible.
-!!! error TS2322:     Type 'string' is not assignable to type 'number | undefined'.
+                                          ~
+!!! error TS2322: Type 'string' is not assignable to type 'number | undefined'.
+!!! related TS6500 tests/cases/conformance/types/mapped/mappedTypeErrors.ts:126:13: The expected type comes from property 'a' which is declared here on type '{ [x: string]: any; a?: number | undefined; }'
     
     // Repro from #13044
     

tests/baselines/reference/nestedFreshLiteral.errors.txt

@@ -1,9 +1,7 @@
-tests/cases/compiler/nestedFreshLiteral.ts(12,21): error TS2322: Type '{ nested: { prop: { colour: string; }; }; }' is not assignable to type 'NestedCSSProps'.
-  Types of property 'nested' are incompatible.
-    Type '{ prop: { colour: string; }; }' is not assignable to type 'NestedSelector'.
-      Types of property 'prop' are incompatible.
-        Type '{ colour: string; }' is not assignable to type 'CSSProps'.
-          Object literal may only specify known properties, but 'colour' does not exist in type 'CSSProps'. Did you mean to write 'color'?
+tests/cases/compiler/nestedFreshLiteral.ts(12,21): error TS2322: Type '{ prop: { colour: string; }; }' is not assignable to type 'NestedSelector'.
+  Types of property 'prop' are incompatible.
+    Type '{ colour: string; }' is not assignable to type 'CSSProps'.
+      Object literal may only specify known properties, but 'colour' does not exist in type 'CSSProps'. Did you mean to write 'color'?
 
 
 ==== tests/cases/compiler/nestedFreshLiteral.ts (1 errors) ====
@@ -20,10 +18,9 @@ tests/cases/compiler/nestedFreshLiteral.ts(12,21): error TS2322: Type '{ nested:
     let stylen: NestedCSSProps = {
       nested: { prop: { colour: 'red' } }
                         ~~~~~~~~~~~~~
-!!! error TS2322: Type '{ nested: { prop: { colour: string; }; }; }' is not assignable to type 'NestedCSSProps'.
-!!! error TS2322:   Types of property 'nested' are incompatible.
-!!! error TS2322:     Type '{ prop: { colour: string; }; }' is not assignable to type 'NestedSelector'.
-!!! error TS2322:       Types of property 'prop' are incompatible.
-!!! error TS2322:         Type '{ colour: string; }' is not assignable to type 'CSSProps'.
-!!! error TS2322:           Object literal may only specify known properties, but 'colour' does not exist in type 'CSSProps'. Did you mean to write 'color'?
+!!! error TS2322: Type '{ prop: { colour: string; }; }' is not assignable to type 'NestedSelector'.
+!!! error TS2322:   Types of property 'prop' are incompatible.
+!!! error TS2322:     Type '{ colour: string; }' is not assignable to type 'CSSProps'.
+!!! error TS2322:       Object literal may only specify known properties, but 'colour' does not exist in type 'CSSProps'. Did you mean to write 'color'?
+!!! related TS6500 tests/cases/compiler/nestedFreshLiteral.ts:5:3: The expected type comes from property 'nested' which is declared here on type 'NestedCSSProps'
     }

tests/baselines/reference/nonPrimitiveAsProperty.errors.txt

@@ -1,6 +1,4 @@
-tests/cases/conformance/types/nonPrimitive/nonPrimitiveAsProperty.ts(7,5): error TS2322: Type '{ foo: string; }' is not assignable to type 'WithNonPrimitive'.
-  Types of property 'foo' are incompatible.
-    Type 'string' is not assignable to type 'object'.
+tests/cases/conformance/types/nonPrimitive/nonPrimitiveAsProperty.ts(7,28): error TS2322: Type 'string' is not assignable to type 'object'.
 
 
 ==== tests/cases/conformance/types/nonPrimitive/nonPrimitiveAsProperty.ts (1 errors) ====
@@ -11,8 +9,7 @@ tests/cases/conformance/types/nonPrimitive/nonPrimitiveAsProperty.ts(7,5): error
     var a: WithNonPrimitive = { foo: {bar: "bar"} };
     
     var b: WithNonPrimitive = {foo: "bar"}; // expect error
-        ~
-!!! error TS2322: Type '{ foo: string; }' is not assignable to type 'WithNonPrimitive'.
-!!! error TS2322:   Types of property 'foo' are incompatible.
-!!! error TS2322:     Type 'string' is not assignable to type 'object'.
+                               ~~~
+!!! error TS2322: Type 'string' is not assignable to type 'object'.
+!!! related TS6500 tests/cases/conformance/types/nonPrimitive/nonPrimitiveAsProperty.ts:2:5: The expected type comes from property 'foo' which is declared here on type 'WithNonPrimitive'
     

tests/baselines/reference/numericIndexerConstrainsPropertyDeclarations.errors.txt

@@ -5,8 +5,7 @@ tests/cases/conformance/types/objectTypeLiteral/indexSignatures/numericIndexerCo
 tests/cases/conformance/types/objectTypeLiteral/indexSignatures/numericIndexerConstrainsPropertyDeclarations.ts(36,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/conformance/types/objectTypeLiteral/indexSignatures/numericIndexerConstrainsPropertyDeclarations.ts(50,5): error TS2412: Property '2.0' of type 'number' is not assignable to numeric index type 'string'.
 tests/cases/conformance/types/objectTypeLiteral/indexSignatures/numericIndexerConstrainsPropertyDeclarations.ts(68,5): error TS2412: Property '2.0' of type 'number' is not assignable to numeric index type 'string'.
-tests/cases/conformance/types/objectTypeLiteral/indexSignatures/numericIndexerConstrainsPropertyDeclarations.ts(79,5): error TS2322: Type '{ a: string; b: number; c: () => void; "d": string; "e": number; 1.0: string; 2.0: number; "3.0": string; "4.0": number; f: any; X: string; foo(): string; }' is not assignable to type '{ [x: number]: string; }'.
-  Object literal may only specify known properties, and 'a' does not exist in type '{ [x: number]: string; }'.
+tests/cases/conformance/types/objectTypeLiteral/indexSignatures/numericIndexerConstrainsPropertyDeclarations.ts(85,5): error TS2322: Type 'number' is not assignable to type 'string'.
 tests/cases/conformance/types/objectTypeLiteral/indexSignatures/numericIndexerConstrainsPropertyDeclarations.ts(88,9): error TS2304: Cannot find name 'Myn'.
 tests/cases/conformance/types/objectTypeLiteral/indexSignatures/numericIndexerConstrainsPropertyDeclarations.ts(90,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/conformance/types/objectTypeLiteral/indexSignatures/numericIndexerConstrainsPropertyDeclarations.ts(93,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
@@ -106,15 +105,15 @@ tests/cases/conformance/types/objectTypeLiteral/indexSignatures/numericIndexerCo
     // error
     var b: { [x: number]: string; } = {
         a: '',
-        ~~~~~
-!!! error TS2322: Type '{ a: string; b: number; c: () => void; "d": string; "e": number; 1.0: string; 2.0: number; "3.0": string; "4.0": number; f: any; X: string; foo(): string; }' is not assignable to type '{ [x: number]: string; }'.
-!!! error TS2322:   Object literal may only specify known properties, and 'a' does not exist in type '{ [x: number]: string; }'.
         b: 1, 
         c: () => { }, 
         "d": '', 
         "e": 1, 
         1.0: '',
         2.0: 1, 
+        ~~~
+!!! error TS2322: Type 'number' is not assignable to type 'string'.
+!!! related TS6501 tests/cases/conformance/types/objectTypeLiteral/indexSignatures/numericIndexerConstrainsPropertyDeclarations.ts:78:10: The expected type comes from this index signature.
         "3.0": '', 
         "4.0": 1, 
         f: <Myn>null, 

tests/baselines/reference/numericIndexerConstrainsPropertyDeclarations2.errors.txt

@@ -1,8 +1,7 @@
 tests/cases/conformance/types/objectTypeLiteral/indexSignatures/numericIndexerConstrainsPropertyDeclarations2.ts(16,5): error TS2412: Property '3.0' of type 'number' is not assignable to numeric index type 'A'.
 tests/cases/conformance/types/objectTypeLiteral/indexSignatures/numericIndexerConstrainsPropertyDeclarations2.ts(25,5): error TS2412: Property '3.0' of type 'number' is not assignable to numeric index type 'A'.
 tests/cases/conformance/types/objectTypeLiteral/indexSignatures/numericIndexerConstrainsPropertyDeclarations2.ts(34,5): error TS2412: Property '3.0' of type 'number' is not assignable to numeric index type 'A'.
-tests/cases/conformance/types/objectTypeLiteral/indexSignatures/numericIndexerConstrainsPropertyDeclarations2.ts(44,5): error TS2322: Type '{ 1.0: A; 2.0: B; "2.5": B; 3.0: number; "4.0": string; }' is not assignable to type '{ [x: number]: A; }'.
-  Object literal may only specify known properties, and '"4.0"' does not exist in type '{ [x: number]: A; }'.
+tests/cases/conformance/types/objectTypeLiteral/indexSignatures/numericIndexerConstrainsPropertyDeclarations2.ts(43,5): error TS2322: Type 'number' is not assignable to type 'A'.
 
 
 ==== tests/cases/conformance/types/objectTypeLiteral/indexSignatures/numericIndexerConstrainsPropertyDeclarations2.ts (4 errors) ====
@@ -55,8 +54,8 @@ tests/cases/conformance/types/objectTypeLiteral/indexSignatures/numericIndexerCo
         2.0: new B(), 
         "2.5": new B(),
         3.0: 1,
+        ~~~
+!!! error TS2322: Type 'number' is not assignable to type 'A'.
+!!! related TS6501 tests/cases/conformance/types/objectTypeLiteral/indexSignatures/numericIndexerConstrainsPropertyDeclarations2.ts:39:10: The expected type comes from this index signature.
         "4.0": ''
-        ~~~~~~~~~
-!!! error TS2322: Type '{ 1.0: A; 2.0: B; "2.5": B; 3.0: number; "4.0": string; }' is not assignable to type '{ [x: number]: A; }'.
-!!! error TS2322:   Object literal may only specify known properties, and '"4.0"' does not exist in type '{ [x: number]: A; }'.
     }

tests/baselines/reference/objectLiteralExcessProperties.errors.txt

@@ -19,10 +19,8 @@ tests/cases/compiler/objectLiteralExcessProperties.ts(23,29): error TS2322: Type
   Object literal may only specify known properties, and 'couleur' does not exist in type 'Cover | Cover[]'.
 tests/cases/compiler/objectLiteralExcessProperties.ts(25,27): error TS2322: Type '{ forewarned: string; }' is not assignable to type 'Book | Book[]'.
   Object literal may only specify known properties, and 'forewarned' does not exist in type 'Book | Book[]'.
-tests/cases/compiler/objectLiteralExcessProperties.ts(33,27): error TS2322: Type '{ 0: { colour: string; }; }' is not assignable to type 'Indexed'.
-  Property '0' is incompatible with index signature.
-    Type '{ colour: string; }' is not assignable to type 'Cover'.
-      Object literal may only specify known properties, but 'colour' does not exist in type 'Cover'. Did you mean to write 'color'?
+tests/cases/compiler/objectLiteralExcessProperties.ts(33,27): error TS2322: Type '{ colour: string; }' is not assignable to type 'Cover'.
+  Object literal may only specify known properties, but 'colour' does not exist in type 'Cover'. Did you mean to write 'color'?
 
 
 ==== tests/cases/compiler/objectLiteralExcessProperties.ts (10 errors) ====
@@ -90,8 +88,7 @@ tests/cases/compiler/objectLiteralExcessProperties.ts(33,27): error TS2322: Type
     
     var b11: Indexed = { 0: { colour: "blue" } }; // nested object literal still errors
                               ~~~~~~~~~~~~~~
-!!! error TS2322: Type '{ 0: { colour: string; }; }' is not assignable to type 'Indexed'.
-!!! error TS2322:   Property '0' is incompatible with index signature.
-!!! error TS2322:     Type '{ colour: string; }' is not assignable to type 'Cover'.
-!!! error TS2322:       Object literal may only specify known properties, but 'colour' does not exist in type 'Cover'. Did you mean to write 'color'?
+!!! error TS2322: Type '{ colour: string; }' is not assignable to type 'Cover'.
+!!! error TS2322:   Object literal may only specify known properties, but 'colour' does not exist in type 'Cover'. Did you mean to write 'color'?
+!!! related TS6501 tests/cases/compiler/objectLiteralExcessProperties.ts:28:5: The expected type comes from this index signature.
     

tests/baselines/reference/objectLiteralIndexerErrors.errors.txt

@@ -1,10 +1,6 @@
-tests/cases/compiler/objectLiteralIndexerErrors.ts(13,5): error TS2322: Type '{ x: B; 0: A; }' is not assignable to type '{ [s: string]: A; [n: number]: B; }'.
-  Property '0' is incompatible with index signature.
-    Type 'A' is not assignable to type 'B'.
-      Property 'y' is missing in type 'A'.
-tests/cases/compiler/objectLiteralIndexerErrors.ts(14,1): error TS2322: Type '{ x: any; 0: A; }' is not assignable to type '{ [s: string]: A; [n: number]: B; }'.
-  Property '0' is incompatible with index signature.
-    Type 'A' is not assignable to type 'B'.
+tests/cases/compiler/objectLiteralIndexerErrors.ts(13,54): error TS2322: Type 'A' is not assignable to type 'B'.
+  Property 'y' is missing in type 'A'.
+tests/cases/compiler/objectLiteralIndexerErrors.ts(14,14): error TS2322: Type 'A' is not assignable to type 'B'.
 
 
 ==== tests/cases/compiler/objectLiteralIndexerErrors.ts (2 errors) ====
@@ -21,13 +17,11 @@ tests/cases/compiler/objectLiteralIndexerErrors.ts(14,1): error TS2322: Type '{
     var c: any;
     
     var o1: { [s: string]: A;[n: number]: B; } = { x: b, 0: a }; // both indexers are A
-        ~~
-!!! error TS2322: Type '{ x: B; 0: A; }' is not assignable to type '{ [s: string]: A; [n: number]: B; }'.
-!!! error TS2322:   Property '0' is incompatible with index signature.
-!!! error TS2322:     Type 'A' is not assignable to type 'B'.
-!!! error TS2322:       Property 'y' is missing in type 'A'.
+                                                         ~
+!!! error TS2322: Type 'A' is not assignable to type 'B'.
+!!! error TS2322:   Property 'y' is missing in type 'A'.
+!!! related TS6501 tests/cases/compiler/objectLiteralIndexerErrors.ts:13:26: The expected type comes from this index signature.
     o1 = { x: c, 0: a }; // string indexer is any, number indexer is A
-    ~~
-!!! error TS2322: Type '{ x: any; 0: A; }' is not assignable to type '{ [s: string]: A; [n: number]: B; }'.
-!!! error TS2322:   Property '0' is incompatible with index signature.
-!!! error TS2322:     Type 'A' is not assignable to type 'B'.
+                 ~
+!!! error TS2322: Type 'A' is not assignable to type 'B'.
+!!! related TS6501 tests/cases/compiler/objectLiteralIndexerErrors.ts:13:26: The expected type comes from this index signature.

tests/baselines/reference/objectLiteralNormalization.errors.txt

@@ -1,6 +1,4 @@
-tests/cases/conformance/expressions/objectLiterals/objectLiteralNormalization.ts(7,1): error TS2322: Type '{ a: number; b: number; }' is not assignable to type '{ a: number; b?: undefined; c?: undefined; } | { a: number; b: string; c?: undefined; } | { a: number; b: string; c: boolean; }'.
-  Type '{ a: number; b: number; }' is not assignable to type '{ a: number; b: string; c: boolean; }'.
-    Property 'c' is missing in type '{ a: number; b: number; }'.
+tests/cases/conformance/expressions/objectLiterals/objectLiteralNormalization.ts(7,14): error TS2322: Type 'number' is not assignable to type 'string | undefined'.
 tests/cases/conformance/expressions/objectLiterals/objectLiteralNormalization.ts(8,1): error TS2322: Type '{ b: string; }' is not assignable to type '{ a: number; b?: undefined; c?: undefined; } | { a: number; b: string; c?: undefined; } | { a: number; b: string; c: boolean; }'.
   Type '{ b: string; }' is not assignable to type '{ a: number; b: string; c: boolean; }'.
     Property 'a' is missing in type '{ b: string; }'.
@@ -25,10 +23,9 @@ tests/cases/conformance/expressions/objectLiterals/objectLiteralNormalization.ts
     a1.c;  // boolean | undefined
     a1 = { a: 1 };
     a1 = { a: 0, b: 0 };  // Error
-    ~~
-!!! error TS2322: Type '{ a: number; b: number; }' is not assignable to type '{ a: number; b?: undefined; c?: undefined; } | { a: number; b: string; c?: undefined; } | { a: number; b: string; c: boolean; }'.
-!!! error TS2322:   Type '{ a: number; b: number; }' is not assignable to type '{ a: number; b: string; c: boolean; }'.
-!!! error TS2322:     Property 'c' is missing in type '{ a: number; b: number; }'.
+                 ~
+!!! error TS2322: Type 'number' is not assignable to type 'string | undefined'.
+!!! related TS6500 tests/cases/conformance/expressions/objectLiterals/objectLiteralNormalization.ts:2:47: The expected type comes from property 'b' which is declared here on type '{ a: number; b?: undefined; c?: undefined; } | { a: number; b: string; c?: undefined; } | { a: number; b: string; c: boolean; }'
     a1 = { b: "y" };  // Error
     ~~
 !!! error TS2322: Type '{ b: string; }' is not assignable to type '{ a: number; b?: undefined; c?: undefined; } | { a: number; b: string; c?: undefined; } | { a: number; b: string; c: boolean; }'.

tests/baselines/reference/objectLiteralShorthandPropertiesAssignmentError.errors.txt

@@ -1,14 +1,13 @@
 tests/cases/conformance/es6/shorthandPropertyAssignment/objectLiteralShorthandPropertiesAssignmentError.ts(4,43): error TS2322: Type '{ name: string; id: number; }' is not assignable to type '{ b: string; id: number; }'.
   Object literal may only specify known properties, and 'name' does not exist in type '{ b: string; id: number; }'.
-tests/cases/conformance/es6/shorthandPropertyAssignment/objectLiteralShorthandPropertiesAssignmentError.ts(6,72): error TS2322: Type '{ name: string; id: number; }' is not assignable to type '{ id: string; name: number; }'.
-  Types of property 'id' are incompatible.
-    Type 'number' is not assignable to type 'string'.
+tests/cases/conformance/es6/shorthandPropertyAssignment/objectLiteralShorthandPropertiesAssignmentError.ts(6,81): error TS2322: Type 'string' is not assignable to type 'number'.
+tests/cases/conformance/es6/shorthandPropertyAssignment/objectLiteralShorthandPropertiesAssignmentError.ts(6,87): error TS2322: Type 'number' is not assignable to type 'string'.
 tests/cases/conformance/es6/shorthandPropertyAssignment/objectLiteralShorthandPropertiesAssignmentError.ts(8,5): error TS2345: Argument of type '{ name: string; id: number; }' is not assignable to parameter of type '{ name: string; id: boolean; }'.
   Types of property 'id' are incompatible.
     Type 'number' is not assignable to type 'boolean'.
 
 
-==== tests/cases/conformance/es6/shorthandPropertyAssignment/objectLiteralShorthandPropertiesAssignmentError.ts (3 errors) ====
+==== tests/cases/conformance/es6/shorthandPropertyAssignment/objectLiteralShorthandPropertiesAssignmentError.ts (4 errors) ====
     var id: number = 10000;
     var name: string = "my name";
     
@@ -18,10 +17,12 @@ tests/cases/conformance/es6/shorthandPropertyAssignment/objectLiteralShorthandPr
 !!! error TS2322:   Object literal may only specify known properties, and 'name' does not exist in type '{ b: string; id: number; }'.
     var person1: { name, id };  // ok
     function foo(name: string, id: number): { id: string, name: number } { return { name, id }; }  // error
-                                                                           ~~~~~~~~~~~~~~~~~~~~
-!!! error TS2322: Type '{ name: string; id: number; }' is not assignable to type '{ id: string; name: number; }'.
-!!! error TS2322:   Types of property 'id' are incompatible.
-!!! error TS2322:     Type 'number' is not assignable to type 'string'.
+                                                                                    ~~~~
+!!! error TS2322: Type 'string' is not assignable to type 'number'.
+!!! related TS6500 tests/cases/conformance/es6/shorthandPropertyAssignment/objectLiteralShorthandPropertiesAssignmentError.ts:6:55: The expected type comes from property 'name' which is declared here on type '{ id: string; name: number; }'
+                                                                                          ~~
+!!! error TS2322: Type 'number' is not assignable to type 'string'.
+!!! related TS6500 tests/cases/conformance/es6/shorthandPropertyAssignment/objectLiteralShorthandPropertiesAssignmentError.ts:6:43: The expected type comes from property 'id' which is declared here on type '{ id: string; name: number; }'
     function bar(obj: { name: string; id: boolean }) { }
     bar({ name, id });  // error
         ~~~~~~~~~~~~

tests/baselines/reference/objectLiteralShorthandPropertiesAssignmentErrorFromMissingIdentifier.errors.txt

@@ -1,14 +1,13 @@
 tests/cases/conformance/es6/shorthandPropertyAssignment/objectLiteralShorthandPropertiesAssignmentErrorFromMissingIdentifier.ts(4,43): error TS2322: Type '{ name: string; id: number; }' is not assignable to type '{ b: string; id: number; }'.
   Object literal may only specify known properties, and 'name' does not exist in type '{ b: string; id: number; }'.
-tests/cases/conformance/es6/shorthandPropertyAssignment/objectLiteralShorthandPropertiesAssignmentErrorFromMissingIdentifier.ts(5,72): error TS2322: Type '{ name: string; id: number; }' is not assignable to type '{ name: number; id: string; }'.
-  Types of property 'name' are incompatible.
-    Type 'string' is not assignable to type 'number'.
+tests/cases/conformance/es6/shorthandPropertyAssignment/objectLiteralShorthandPropertiesAssignmentErrorFromMissingIdentifier.ts(5,81): error TS2322: Type 'string' is not assignable to type 'number'.
+tests/cases/conformance/es6/shorthandPropertyAssignment/objectLiteralShorthandPropertiesAssignmentErrorFromMissingIdentifier.ts(5,87): error TS2322: Type 'number' is not assignable to type 'string'.
 tests/cases/conformance/es6/shorthandPropertyAssignment/objectLiteralShorthandPropertiesAssignmentErrorFromMissingIdentifier.ts(8,5): error TS2322: Type '{ name: number; id: string; }' is not assignable to type '{ name: string; id: number; }'.
   Types of property 'name' are incompatible.
     Type 'number' is not assignable to type 'string'.
 
 
-==== tests/cases/conformance/es6/shorthandPropertyAssignment/objectLiteralShorthandPropertiesAssignmentErrorFromMissingIdentifier.ts (3 errors) ====
+==== tests/cases/conformance/es6/shorthandPropertyAssignment/objectLiteralShorthandPropertiesAssignmentErrorFromMissingIdentifier.ts (4 errors) ====
     var id: number = 10000;
     var name: string = "my name";
     
@@ -17,10 +16,12 @@ tests/cases/conformance/es6/shorthandPropertyAssignment/objectLiteralShorthandPr
 !!! error TS2322: Type '{ name: string; id: number; }' is not assignable to type '{ b: string; id: number; }'.
 !!! error TS2322:   Object literal may only specify known properties, and 'name' does not exist in type '{ b: string; id: number; }'.
     function bar(name: string, id: number): { name: number, id: string } { return { name, id }; }  // error
-                                                                           ~~~~~~~~~~~~~~~~~~~~
-!!! error TS2322: Type '{ name: string; id: number; }' is not assignable to type '{ name: number; id: string; }'.
-!!! error TS2322:   Types of property 'name' are incompatible.
-!!! error TS2322:     Type 'string' is not assignable to type 'number'.
+                                                                                    ~~~~
+!!! error TS2322: Type 'string' is not assignable to type 'number'.
+!!! related TS6500 tests/cases/conformance/es6/shorthandPropertyAssignment/objectLiteralShorthandPropertiesAssignmentErrorFromMissingIdentifier.ts:5:43: The expected type comes from property 'name' which is declared here on type '{ name: number; id: string; }'
+                                                                                          ~~
+!!! error TS2322: Type 'number' is not assignable to type 'string'.
+!!! related TS6500 tests/cases/conformance/es6/shorthandPropertyAssignment/objectLiteralShorthandPropertiesAssignmentErrorFromMissingIdentifier.ts:5:57: The expected type comes from property 'id' which is declared here on type '{ name: number; id: string; }'
     function foo(name: string, id: number): { name: string, id: number } { return { name, id }; }  // error
     var person1: { name, id }; // ok
     var person2: { name: string, id: number } = bar("hello", 5);

tests/baselines/reference/objectLiteralWithNumericPropertyName.errors.txt

@@ -1,6 +1,4 @@
-tests/cases/compiler/objectLiteralWithNumericPropertyName.ts(4,5): error TS2322: Type '{ 0: number; }' is not assignable to type 'A'.
-  Types of property '0' are incompatible.
-    Type 'number' is not assignable to type 'string'.
+tests/cases/compiler/objectLiteralWithNumericPropertyName.ts(5,5): error TS2322: Type 'number' is not assignable to type 'string'.
 
 
 ==== tests/cases/compiler/objectLiteralWithNumericPropertyName.ts (1 errors) ====
@@ -8,10 +6,9 @@ tests/cases/compiler/objectLiteralWithNumericPropertyName.ts(4,5): error TS2322:
         0: string;
     }
     var x: A = {
-        ~
-!!! error TS2322: Type '{ 0: number; }' is not assignable to type 'A'.
-!!! error TS2322:   Types of property '0' are incompatible.
-!!! error TS2322:     Type 'number' is not assignable to type 'string'.
         0: 3
+        ~
+!!! error TS2322: Type 'number' is not assignable to type 'string'.
+!!! related TS6500 tests/cases/compiler/objectLiteralWithNumericPropertyName.ts:2:5: The expected type comes from property '0' which is declared here on type 'A'
     };
     

tests/baselines/reference/objectSpreadStrictNull.errors.txt

@@ -10,9 +10,7 @@ tests/cases/conformance/types/spread/objectSpreadStrictNull.ts(18,9): error TS23
   Types of property 'sn' are incompatible.
     Type 'string | number | undefined' is not assignable to type 'string | number | boolean'.
       Type 'undefined' is not assignable to type 'string | number | boolean'.
-tests/cases/conformance/types/spread/objectSpreadStrictNull.ts(28,7): error TS2322: Type '{ title: undefined; yearReleased: number; }' is not assignable to type 'Movie'.
-  Types of property 'title' are incompatible.
-    Type 'undefined' is not assignable to type 'string'.
+tests/cases/conformance/types/spread/objectSpreadStrictNull.ts(28,26): error TS2322: Type 'undefined' is not assignable to type 'string'.
 tests/cases/conformance/types/spread/objectSpreadStrictNull.ts(42,5): error TS2322: Type '{ foo: number | undefined; bar: string | undefined; }' is not assignable to type 'Fields'.
   Types of property 'foo' are incompatible.
     Type 'number | undefined' is not assignable to type 'number'.
@@ -63,10 +61,9 @@ tests/cases/conformance/types/spread/objectSpreadStrictNull.ts(42,5): error TS23
     const m = { title: "The Matrix", yearReleased: 1999 };
     // should error here because title: undefined is not assignable to string
     const x: Movie = { ...m, title: undefined };
-          ~
-!!! error TS2322: Type '{ title: undefined; yearReleased: number; }' is not assignable to type 'Movie'.
-!!! error TS2322:   Types of property 'title' are incompatible.
-!!! error TS2322:     Type 'undefined' is not assignable to type 'string'.
+                             ~~~~~
+!!! error TS2322: Type 'undefined' is not assignable to type 'string'.
+!!! related TS6500 tests/cases/conformance/types/spread/objectSpreadStrictNull.ts:22:5: The expected type comes from property 'title' which is declared here on type 'Movie'
     
     interface Fields {
         foo: number;

tests/baselines/reference/returnInConstructor1.errors.txt

@@ -2,10 +2,8 @@ tests/cases/compiler/returnInConstructor1.ts(11,9): error TS2322: Type '1' is no
 tests/cases/compiler/returnInConstructor1.ts(11,9): error TS2409: Return type of constructor signature must be assignable to the instance type of the class.
 tests/cases/compiler/returnInConstructor1.ts(25,9): error TS2322: Type '"test"' is not assignable to type 'D'.
 tests/cases/compiler/returnInConstructor1.ts(25,9): error TS2409: Return type of constructor signature must be assignable to the instance type of the class.
-tests/cases/compiler/returnInConstructor1.ts(39,9): error TS2322: Type '{ foo: number; }' is not assignable to type 'F'.
-  Types of property 'foo' are incompatible.
-    Type 'number' is not assignable to type 'string'.
 tests/cases/compiler/returnInConstructor1.ts(39,9): error TS2409: Return type of constructor signature must be assignable to the instance type of the class.
+tests/cases/compiler/returnInConstructor1.ts(39,18): error TS2322: Type 'number' is not assignable to type 'string'.
 tests/cases/compiler/returnInConstructor1.ts(55,9): error TS2322: Type 'G' is not assignable to type 'H'.
   Types of property 'foo' are incompatible.
     Type '() => void' is not assignable to type 'string'.
@@ -61,11 +59,10 @@ tests/cases/compiler/returnInConstructor1.ts(55,9): error TS2409: Return type of
         constructor() {
             return { foo: 1 }; //error
             ~~~~~~~~~~~~~~~~~~
-!!! error TS2322: Type '{ foo: number; }' is not assignable to type 'F'.
-!!! error TS2322:   Types of property 'foo' are incompatible.
-!!! error TS2322:     Type 'number' is not assignable to type 'string'.
-            ~~~~~~~~~~~~~~~~~~
 !!! error TS2409: Return type of constructor signature must be assignable to the instance type of the class.
+                     ~~~
+!!! error TS2322: Type 'number' is not assignable to type 'string'.
+!!! related TS6500 tests/cases/compiler/returnInConstructor1.ts:37:12: The expected type comes from property 'foo' which is declared here on type 'F'
         }
     }
     

tests/baselines/reference/shorthandPropertyAssignmentsInDestructuring.errors.txt

@@ -6,19 +6,18 @@ tests/cases/compiler/shorthandPropertyAssignmentsInDestructuring.ts(70,5): error
 tests/cases/compiler/shorthandPropertyAssignmentsInDestructuring.ts(75,8): error TS2322: Type '5' is not assignable to type 'string'.
 tests/cases/compiler/shorthandPropertyAssignmentsInDestructuring.ts(75,8): error TS2322: Type 'number' is not assignable to type 'string'.
 tests/cases/compiler/shorthandPropertyAssignmentsInDestructuring.ts(80,5): error TS2322: Type '5' is not assignable to type 'string'.
-tests/cases/compiler/shorthandPropertyAssignmentsInDestructuring.ts(80,13): error TS2322: Type '{ x: number; }' is not assignable to type '{ x: string; }'.
-  Types of property 'x' are incompatible.
-    Type 'number' is not assignable to type 'string'.
+tests/cases/compiler/shorthandPropertyAssignmentsInDestructuring.ts(80,20): error TS2322: Type 'number' is not assignable to type 'string'.
 tests/cases/compiler/shorthandPropertyAssignmentsInDestructuring.ts(85,8): error TS2322: Type '5' is not assignable to type 'string'.
 tests/cases/compiler/shorthandPropertyAssignmentsInDestructuring.ts(85,8): error TS2322: Type 'number' is not assignable to type 'string'.
 tests/cases/compiler/shorthandPropertyAssignmentsInDestructuring.ts(85,19): error TS2322: Type '{ x: number; }' is not assignable to type '{ x: string; }'.
   Types of property 'x' are incompatible.
     Type 'number' is not assignable to type 'string'.
+tests/cases/compiler/shorthandPropertyAssignmentsInDestructuring.ts(85,26): error TS2322: Type 'number' is not assignable to type 'string'.
 tests/cases/compiler/shorthandPropertyAssignmentsInDestructuring.ts(111,12): error TS2304: Cannot find name 's'.
 tests/cases/compiler/shorthandPropertyAssignmentsInDestructuring.ts(111,14): error TS1312: '=' can only be used in an object literal property inside a destructuring assignment.
 
 
-==== tests/cases/compiler/shorthandPropertyAssignmentsInDestructuring.ts (14 errors) ====
+==== tests/cases/compiler/shorthandPropertyAssignmentsInDestructuring.ts (15 errors) ====
     (function() {
     	var s0;
     	for ({ s0 = 5 } of [{ s0: 1 }]) {
@@ -115,10 +114,9 @@ tests/cases/compiler/shorthandPropertyAssignmentsInDestructuring.ts(111,14): err
     	({ y2 = 5, y3 = { x: 1 } } = {})
     	   ~~
 !!! error TS2322: Type '5' is not assignable to type 'string'.
-    	           ~~
-!!! error TS2322: Type '{ x: number; }' is not assignable to type '{ x: string; }'.
-!!! error TS2322:   Types of property 'x' are incompatible.
-!!! error TS2322:     Type 'number' is not assignable to type 'string'.
+    	                  ~
+!!! error TS2322: Type 'number' is not assignable to type 'string'.
+!!! related TS6500 tests/cases/compiler/shorthandPropertyAssignmentsInDestructuring.ts:79:24: The expected type comes from property 'x' which is declared here on type '{ x: string; }'
     });
     
     (function() {
@@ -132,6 +130,9 @@ tests/cases/compiler/shorthandPropertyAssignmentsInDestructuring.ts(111,14): err
 !!! error TS2322: Type '{ x: number; }' is not assignable to type '{ x: string; }'.
 !!! error TS2322:   Types of property 'x' are incompatible.
 !!! error TS2322:     Type 'number' is not assignable to type 'string'.
+    	                        ~
+!!! error TS2322: Type 'number' is not assignable to type 'string'.
+!!! related TS6500 tests/cases/compiler/shorthandPropertyAssignmentsInDestructuring.ts:84:24: The expected type comes from property 'x' which is declared here on type '{ x: string; }'
     });
     
     (function() {

tests/baselines/reference/shorthandPropertyAssignmentsInDestructuring_ES6.errors.txt

@@ -6,19 +6,18 @@ tests/cases/compiler/shorthandPropertyAssignmentsInDestructuring_ES6.ts(70,5): e
 tests/cases/compiler/shorthandPropertyAssignmentsInDestructuring_ES6.ts(75,8): error TS2322: Type '5' is not assignable to type 'string'.
 tests/cases/compiler/shorthandPropertyAssignmentsInDestructuring_ES6.ts(75,8): error TS2322: Type 'number' is not assignable to type 'string'.
 tests/cases/compiler/shorthandPropertyAssignmentsInDestructuring_ES6.ts(80,5): error TS2322: Type '5' is not assignable to type 'string'.
-tests/cases/compiler/shorthandPropertyAssignmentsInDestructuring_ES6.ts(80,13): error TS2322: Type '{ x: number; }' is not assignable to type '{ x: string; }'.
-  Types of property 'x' are incompatible.
-    Type 'number' is not assignable to type 'string'.
+tests/cases/compiler/shorthandPropertyAssignmentsInDestructuring_ES6.ts(80,20): error TS2322: Type 'number' is not assignable to type 'string'.
 tests/cases/compiler/shorthandPropertyAssignmentsInDestructuring_ES6.ts(85,8): error TS2322: Type '5' is not assignable to type 'string'.
 tests/cases/compiler/shorthandPropertyAssignmentsInDestructuring_ES6.ts(85,8): error TS2322: Type 'number' is not assignable to type 'string'.
 tests/cases/compiler/shorthandPropertyAssignmentsInDestructuring_ES6.ts(85,19): error TS2322: Type '{ x: number; }' is not assignable to type '{ x: string; }'.
   Types of property 'x' are incompatible.
     Type 'number' is not assignable to type 'string'.
+tests/cases/compiler/shorthandPropertyAssignmentsInDestructuring_ES6.ts(85,26): error TS2322: Type 'number' is not assignable to type 'string'.
 tests/cases/compiler/shorthandPropertyAssignmentsInDestructuring_ES6.ts(111,12): error TS2304: Cannot find name 's'.
 tests/cases/compiler/shorthandPropertyAssignmentsInDestructuring_ES6.ts(111,14): error TS1312: '=' can only be used in an object literal property inside a destructuring assignment.
 
 
-==== tests/cases/compiler/shorthandPropertyAssignmentsInDestructuring_ES6.ts (14 errors) ====
+==== tests/cases/compiler/shorthandPropertyAssignmentsInDestructuring_ES6.ts (15 errors) ====
     (function() {
     	var s0;
     	for ({ s0 = 5 } of [{ s0: 1 }]) {
@@ -115,10 +114,9 @@ tests/cases/compiler/shorthandPropertyAssignmentsInDestructuring_ES6.ts(111,14):
     	({ y2 = 5, y3 = { x: 1 } } = {})
     	   ~~
 !!! error TS2322: Type '5' is not assignable to type 'string'.
-    	           ~~
-!!! error TS2322: Type '{ x: number; }' is not assignable to type '{ x: string; }'.
-!!! error TS2322:   Types of property 'x' are incompatible.
-!!! error TS2322:     Type 'number' is not assignable to type 'string'.
+    	                  ~
+!!! error TS2322: Type 'number' is not assignable to type 'string'.
+!!! related TS6500 tests/cases/compiler/shorthandPropertyAssignmentsInDestructuring_ES6.ts:79:24: The expected type comes from property 'x' which is declared here on type '{ x: string; }'
     });
     
     (function() {
@@ -132,6 +130,9 @@ tests/cases/compiler/shorthandPropertyAssignmentsInDestructuring_ES6.ts(111,14):
 !!! error TS2322: Type '{ x: number; }' is not assignable to type '{ x: string; }'.
 !!! error TS2322:   Types of property 'x' are incompatible.
 !!! error TS2322:     Type 'number' is not assignable to type 'string'.
+    	                        ~
+!!! error TS2322: Type 'number' is not assignable to type 'string'.
+!!! related TS6500 tests/cases/compiler/shorthandPropertyAssignmentsInDestructuring_ES6.ts:84:24: The expected type comes from property 'x' which is declared here on type '{ x: string; }'
     });
     
     (function() {

tests/baselines/reference/slightlyIndirectedDeepObjectLiteralElaborations.errors.txt

@@ -0,0 +1,28 @@
+tests/cases/compiler/slightlyIndirectedDeepObjectLiteralElaborations.ts(16,17): error TS2322: Type 'number' is not assignable to type 'string'.
+
+
+==== tests/cases/compiler/slightlyIndirectedDeepObjectLiteralElaborations.ts (1 errors) ====
+    interface Foo {
+        a: {
+            b: {
+                c: {
+                    d: string
+                }
+            }
+        }
+    }
+    
+    let q: Foo["a"] | undefined;
+    const x: Foo = (void 0, {
+        a: q = {
+            b: ({
+                c: {
+                    d: 42
+                    ~
+!!! error TS2322: Type 'number' is not assignable to type 'string'.
+!!! related TS6500 tests/cases/compiler/slightlyIndirectedDeepObjectLiteralElaborations.ts:5:17: The expected type comes from property 'd' which is declared here on type '{ d: string; }'
+                }
+            })
+        }
+    });
+    

tests/baselines/reference/slightlyIndirectedDeepObjectLiteralElaborations.js

@@ -0,0 +1,34 @@
+//// [slightlyIndirectedDeepObjectLiteralElaborations.ts]
+interface Foo {
+    a: {
+        b: {
+            c: {
+                d: string
+            }
+        }
+    }
+}
+
+let q: Foo["a"] | undefined;
+const x: Foo = (void 0, {
+    a: q = {
+        b: ({
+            c: {
+                d: 42
+            }
+        })
+    }
+});
+
+
+//// [slightlyIndirectedDeepObjectLiteralElaborations.js]
+var q;
+var x = (void 0, {
+    a: q = {
+        b: ({
+            c: {
+                d: 42
+            }
+        })
+    }
+});

tests/baselines/reference/slightlyIndirectedDeepObjectLiteralElaborations.symbols

@@ -0,0 +1,45 @@
+=== tests/cases/compiler/slightlyIndirectedDeepObjectLiteralElaborations.ts ===
+interface Foo {
+>Foo : Symbol(Foo, Decl(slightlyIndirectedDeepObjectLiteralElaborations.ts, 0, 0))
+
+    a: {
+>a : Symbol(Foo.a, Decl(slightlyIndirectedDeepObjectLiteralElaborations.ts, 0, 15))
+
+        b: {
+>b : Symbol(b, Decl(slightlyIndirectedDeepObjectLiteralElaborations.ts, 1, 8))
+
+            c: {
+>c : Symbol(c, Decl(slightlyIndirectedDeepObjectLiteralElaborations.ts, 2, 12))
+
+                d: string
+>d : Symbol(d, Decl(slightlyIndirectedDeepObjectLiteralElaborations.ts, 3, 16))
+            }
+        }
+    }
+}
+
+let q: Foo["a"] | undefined;
+>q : Symbol(q, Decl(slightlyIndirectedDeepObjectLiteralElaborations.ts, 10, 3))
+>Foo : Symbol(Foo, Decl(slightlyIndirectedDeepObjectLiteralElaborations.ts, 0, 0))
+
+const x: Foo = (void 0, {
+>x : Symbol(x, Decl(slightlyIndirectedDeepObjectLiteralElaborations.ts, 11, 5))
+>Foo : Symbol(Foo, Decl(slightlyIndirectedDeepObjectLiteralElaborations.ts, 0, 0))
+
+    a: q = {
+>a : Symbol(a, Decl(slightlyIndirectedDeepObjectLiteralElaborations.ts, 11, 25))
+>q : Symbol(q, Decl(slightlyIndirectedDeepObjectLiteralElaborations.ts, 10, 3))
+
+        b: ({
+>b : Symbol(b, Decl(slightlyIndirectedDeepObjectLiteralElaborations.ts, 12, 12))
+
+            c: {
+>c : Symbol(c, Decl(slightlyIndirectedDeepObjectLiteralElaborations.ts, 13, 13))
+
+                d: 42
+>d : Symbol(d, Decl(slightlyIndirectedDeepObjectLiteralElaborations.ts, 14, 16))
+            }
+        })
+    }
+});
+

tests/baselines/reference/slightlyIndirectedDeepObjectLiteralElaborations.types

@@ -0,0 +1,56 @@
+=== tests/cases/compiler/slightlyIndirectedDeepObjectLiteralElaborations.ts ===
+interface Foo {
+>Foo : Foo
+
+    a: {
+>a : { b: { c: { d: string; }; }; }
+
+        b: {
+>b : { c: { d: string; }; }
+
+            c: {
+>c : { d: string; }
+
+                d: string
+>d : string
+            }
+        }
+    }
+}
+
+let q: Foo["a"] | undefined;
+>q : { b: { c: { d: string; }; }; }
+>Foo : Foo
+
+const x: Foo = (void 0, {
+>x : Foo
+>Foo : Foo
+>(void 0, {    a: q = {        b: ({            c: {                d: 42            }        })    }}) : { a: { b: { c: { d: number; }; }; }; }
+>void 0, {    a: q = {        b: ({            c: {                d: 42            }        })    }} : { a: { b: { c: { d: number; }; }; }; }
+>void 0 : undefined
+>0 : 0
+>{    a: q = {        b: ({            c: {                d: 42            }        })    }} : { a: { b: { c: { d: number; }; }; }; }
+
+    a: q = {
+>a : { b: { c: { d: number; }; }; }
+>q = {        b: ({            c: {                d: 42            }        })    } : { b: { c: { d: number; }; }; }
+>q : { b: { c: { d: string; }; }; }
+>{        b: ({            c: {                d: 42            }        })    } : { b: { c: { d: number; }; }; }
+
+        b: ({
+>b : { c: { d: number; }; }
+>({            c: {                d: 42            }        }) : { c: { d: number; }; }
+>{            c: {                d: 42            }        } : { c: { d: number; }; }
+
+            c: {
+>c : { d: number; }
+>{                d: 42            } : { d: number; }
+
+                d: 42
+>d : number
+>42 : 42
+            }
+        })
+    }
+});
+

tests/baselines/reference/spreadUnion3.errors.txt

@@ -1,7 +1,4 @@
-tests/cases/conformance/types/spread/spreadUnion3.ts(2,5): error TS2322: Type '{ y: number; } | { y: string; }' is not assignable to type '{ y: string; }'.
-  Type '{ y: number; }' is not assignable to type '{ y: string; }'.
-    Types of property 'y' are incompatible.
-      Type 'number' is not assignable to type 'string'.
+tests/cases/conformance/types/spread/spreadUnion3.ts(2,14): error TS2322: Type 'number' is not assignable to type 'string'.
 tests/cases/conformance/types/spread/spreadUnion3.ts(9,23): error TS2339: Property 'a' does not exist on type '{}'.
 tests/cases/conformance/types/spread/spreadUnion3.ts(17,11): error TS2698: Spread types may only be created from object types.
 tests/cases/conformance/types/spread/spreadUnion3.ts(18,11): error TS2698: Spread types may only be created from object types.
@@ -10,11 +7,9 @@ tests/cases/conformance/types/spread/spreadUnion3.ts(18,11): error TS2698: Sprea
 ==== tests/cases/conformance/types/spread/spreadUnion3.ts (4 errors) ====
     function f(x: { y: string } | undefined): { y: string } {
         return { y: 123, ...x } // y: string | number
-        ~~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS2322: Type '{ y: number; } | { y: string; }' is not assignable to type '{ y: string; }'.
-!!! error TS2322:   Type '{ y: number; }' is not assignable to type '{ y: string; }'.
-!!! error TS2322:     Types of property 'y' are incompatible.
-!!! error TS2322:       Type 'number' is not assignable to type 'string'.
+                 ~
+!!! error TS2322: Type 'number' is not assignable to type 'string'.
+!!! related TS6500 tests/cases/conformance/types/spread/spreadUnion3.ts:1:45: The expected type comes from property 'y' which is declared here on type '{ y: string; }'
     }
     f(undefined)
     

tests/baselines/reference/stringIndexerConstrainsPropertyDeclarations.errors.txt

@@ -22,14 +22,18 @@ tests/cases/conformance/types/objectTypeLiteral/indexSignatures/stringIndexerCon
 tests/cases/conformance/types/objectTypeLiteral/indexSignatures/stringIndexerConstrainsPropertyDeclarations.ts(71,5): error TS2411: Property 'foo' of type '() => string' is not assignable to string index type 'string'.
 tests/cases/conformance/types/objectTypeLiteral/indexSignatures/stringIndexerConstrainsPropertyDeclarations.ts(73,5): error TS2411: Property '"4.0"' of type 'number' is not assignable to string index type 'string'.
 tests/cases/conformance/types/objectTypeLiteral/indexSignatures/stringIndexerConstrainsPropertyDeclarations.ts(74,5): error TS2411: Property 'f' of type 'MyString' is not assignable to string index type 'string'.
-tests/cases/conformance/types/objectTypeLiteral/indexSignatures/stringIndexerConstrainsPropertyDeclarations.ts(78,5): error TS2322: Type '{ a: string; b: number; c: () => void; "d": string; "e": number; 1.0: string; 2.0: number; "3.0": string; "4.0": number; f: MyString; X: string; foo(): string; }' is not assignable to type '{ [x: string]: string; }'.
-  Property 'b' is incompatible with index signature.
-    Type 'number' is not assignable to type 'string'.
+tests/cases/conformance/types/objectTypeLiteral/indexSignatures/stringIndexerConstrainsPropertyDeclarations.ts(80,5): error TS2322: Type 'number' is not assignable to type 'string'.
+tests/cases/conformance/types/objectTypeLiteral/indexSignatures/stringIndexerConstrainsPropertyDeclarations.ts(81,5): error TS2322: Type '() => void' is not assignable to type 'string'.
+tests/cases/conformance/types/objectTypeLiteral/indexSignatures/stringIndexerConstrainsPropertyDeclarations.ts(83,5): error TS2322: Type 'number' is not assignable to type 'string'.
+tests/cases/conformance/types/objectTypeLiteral/indexSignatures/stringIndexerConstrainsPropertyDeclarations.ts(85,5): error TS2322: Type 'number' is not assignable to type 'string'.
+tests/cases/conformance/types/objectTypeLiteral/indexSignatures/stringIndexerConstrainsPropertyDeclarations.ts(87,5): error TS2322: Type 'number' is not assignable to type 'string'.
+tests/cases/conformance/types/objectTypeLiteral/indexSignatures/stringIndexerConstrainsPropertyDeclarations.ts(88,5): error TS2322: Type 'MyString' is not assignable to type 'string'.
 tests/cases/conformance/types/objectTypeLiteral/indexSignatures/stringIndexerConstrainsPropertyDeclarations.ts(90,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/conformance/types/objectTypeLiteral/indexSignatures/stringIndexerConstrainsPropertyDeclarations.ts(93,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
+tests/cases/conformance/types/objectTypeLiteral/indexSignatures/stringIndexerConstrainsPropertyDeclarations.ts(94,5): error TS2322: Type '() => string' is not assignable to type 'string'.
 
 
-==== tests/cases/conformance/types/objectTypeLiteral/indexSignatures/stringIndexerConstrainsPropertyDeclarations.ts (27 errors) ====
+==== tests/cases/conformance/types/objectTypeLiteral/indexSignatures/stringIndexerConstrainsPropertyDeclarations.ts (33 errors) ====
     // String indexer types constrain the types of named properties in their containing type
     
     interface MyString extends String {
@@ -156,20 +160,34 @@ tests/cases/conformance/types/objectTypeLiteral/indexSignatures/stringIndexerCon
     
     // error
     var b: { [x: string]: string; } = {
-        ~
-!!! error TS2322: Type '{ a: string; b: number; c: () => void; "d": string; "e": number; 1.0: string; 2.0: number; "3.0": string; "4.0": number; f: MyString; X: string; foo(): string; }' is not assignable to type '{ [x: string]: string; }'.
-!!! error TS2322:   Property 'b' is incompatible with index signature.
-!!! error TS2322:     Type 'number' is not assignable to type 'string'.
         a: '',
         b: 1, 
+        ~
+!!! error TS2322: Type 'number' is not assignable to type 'string'.
+!!! related TS6501 tests/cases/conformance/types/objectTypeLiteral/indexSignatures/stringIndexerConstrainsPropertyDeclarations.ts:78:10: The expected type comes from this index signature.
         c: () => { }, 
+        ~
+!!! error TS2322: Type '() => void' is not assignable to type 'string'.
+!!! related TS6501 tests/cases/conformance/types/objectTypeLiteral/indexSignatures/stringIndexerConstrainsPropertyDeclarations.ts:78:10: The expected type comes from this index signature.
         "d": '', 
         "e": 1, 
+        ~~~
+!!! error TS2322: Type 'number' is not assignable to type 'string'.
+!!! related TS6501 tests/cases/conformance/types/objectTypeLiteral/indexSignatures/stringIndexerConstrainsPropertyDeclarations.ts:78:10: The expected type comes from this index signature.
         1.0: '',
         2.0: 1, 
+        ~~~
+!!! error TS2322: Type 'number' is not assignable to type 'string'.
+!!! related TS6501 tests/cases/conformance/types/objectTypeLiteral/indexSignatures/stringIndexerConstrainsPropertyDeclarations.ts:78:10: The expected type comes from this index signature.
         "3.0": '', 
         "4.0": 1, 
+        ~~~~~
+!!! error TS2322: Type 'number' is not assignable to type 'string'.
+!!! related TS6501 tests/cases/conformance/types/objectTypeLiteral/indexSignatures/stringIndexerConstrainsPropertyDeclarations.ts:78:10: The expected type comes from this index signature.
         f: <MyString>null, 
+        ~
+!!! error TS2322: Type 'MyString' is not assignable to type 'string'.
+!!! related TS6501 tests/cases/conformance/types/objectTypeLiteral/indexSignatures/stringIndexerConstrainsPropertyDeclarations.ts:78:10: The expected type comes from this index signature.
     
         get X() { 
             ~
@@ -180,6 +198,9 @@ tests/cases/conformance/types/objectTypeLiteral/indexSignatures/stringIndexerCon
             ~
 !!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
         foo() { 
+        ~~~
+!!! error TS2322: Type '() => string' is not assignable to type 'string'.
+!!! related TS6501 tests/cases/conformance/types/objectTypeLiteral/indexSignatures/stringIndexerConstrainsPropertyDeclarations.ts:78:10: The expected type comes from this index signature.
             return '';
         }
     }

tests/baselines/reference/stringIndexerConstrainsPropertyDeclarations2.errors.txt

@@ -4,13 +4,13 @@ tests/cases/conformance/types/objectTypeLiteral/indexSignatures/stringIndexerCon
 tests/cases/conformance/types/objectTypeLiteral/indexSignatures/stringIndexerConstrainsPropertyDeclarations2.ts(24,5): error TS2411: Property 'd' of type 'string' is not assignable to string index type 'A'.
 tests/cases/conformance/types/objectTypeLiteral/indexSignatures/stringIndexerConstrainsPropertyDeclarations2.ts(31,5): error TS2411: Property 'c' of type 'number' is not assignable to string index type 'A'.
 tests/cases/conformance/types/objectTypeLiteral/indexSignatures/stringIndexerConstrainsPropertyDeclarations2.ts(32,5): error TS2411: Property 'd' of type 'string' is not assignable to string index type 'A'.
-tests/cases/conformance/types/objectTypeLiteral/indexSignatures/stringIndexerConstrainsPropertyDeclarations2.ts(36,5): error TS2322: Type '{ a: typeof A; b: typeof B; }' is not assignable to type '{ [x: string]: A; }'.
-  Property 'a' is incompatible with index signature.
-    Type 'typeof A' is not assignable to type 'A'.
-      Property 'foo' is missing in type 'typeof A'.
+tests/cases/conformance/types/objectTypeLiteral/indexSignatures/stringIndexerConstrainsPropertyDeclarations2.ts(37,5): error TS2322: Type 'typeof A' is not assignable to type 'A'.
+  Property 'foo' is missing in type 'typeof A'.
+tests/cases/conformance/types/objectTypeLiteral/indexSignatures/stringIndexerConstrainsPropertyDeclarations2.ts(38,5): error TS2322: Type 'typeof B' is not assignable to type 'A'.
+  Property 'foo' is missing in type 'typeof B'.
 
 
-==== tests/cases/conformance/types/objectTypeLiteral/indexSignatures/stringIndexerConstrainsPropertyDeclarations2.ts (7 errors) ====
+==== tests/cases/conformance/types/objectTypeLiteral/indexSignatures/stringIndexerConstrainsPropertyDeclarations2.ts (8 errors) ====
     // String indexer providing a constraint of a user defined type
     
     class A {
@@ -59,11 +59,14 @@ tests/cases/conformance/types/objectTypeLiteral/indexSignatures/stringIndexerCon
     
     // error
     var b: { [x: string]: A } = {
-        ~
-!!! error TS2322: Type '{ a: typeof A; b: typeof B; }' is not assignable to type '{ [x: string]: A; }'.
-!!! error TS2322:   Property 'a' is incompatible with index signature.
-!!! error TS2322:     Type 'typeof A' is not assignable to type 'A'.
-!!! error TS2322:       Property 'foo' is missing in type 'typeof A'.
         a: A,
+        ~
+!!! error TS2322: Type 'typeof A' is not assignable to type 'A'.
+!!! error TS2322:   Property 'foo' is missing in type 'typeof A'.
+!!! related TS6501 tests/cases/conformance/types/objectTypeLiteral/indexSignatures/stringIndexerConstrainsPropertyDeclarations2.ts:36:10: The expected type comes from this index signature.
         b: B
+        ~
+!!! error TS2322: Type 'typeof B' is not assignable to type 'A'.
+!!! error TS2322:   Property 'foo' is missing in type 'typeof B'.
+!!! related TS6501 tests/cases/conformance/types/objectTypeLiteral/indexSignatures/stringIndexerConstrainsPropertyDeclarations2.ts:36:10: The expected type comes from this index signature.
     }

tests/baselines/reference/tsxAttributeErrors.errors.txt

@@ -1,7 +1,5 @@
-tests/cases/conformance/jsx/tsxAttributeErrors.tsx(14,6): error TS2326: Types of property 'text' are incompatible.
-  Type 'number' is not assignable to type 'string'.
-tests/cases/conformance/jsx/tsxAttributeErrors.tsx(17,6): error TS2326: Types of property 'width' are incompatible.
-  Type 'string' is not assignable to type 'number'.
+tests/cases/conformance/jsx/tsxAttributeErrors.tsx(14,6): error TS2322: Type 'number' is not assignable to type 'string'.
+tests/cases/conformance/jsx/tsxAttributeErrors.tsx(17,6): error TS2322: Type 'string' is not assignable to type 'number'.
 tests/cases/conformance/jsx/tsxAttributeErrors.tsx(21,2): error TS2322: Type '{ text: number; }' is not assignable to type '{ text?: string; width?: number; }'.
   Types of property 'text' are incompatible.
     Type 'number' is not assignable to type 'string'.
@@ -22,15 +20,15 @@ tests/cases/conformance/jsx/tsxAttributeErrors.tsx(21,2): error TS2322: Type '{
     
     // Error, number is not assignable to string
     <div text={42} />;
-         ~~~~~~~~~
-!!! error TS2326: Types of property 'text' are incompatible.
-!!! error TS2326:   Type 'number' is not assignable to type 'string'.
+         ~~~~
+!!! error TS2322: Type 'number' is not assignable to type 'string'.
+!!! related TS6500 tests/cases/conformance/jsx/tsxAttributeErrors.tsx:5:4: The expected type comes from property 'text' which is declared here on type '{ text?: string; width?: number; }'
     
     // Error, string is not assignable to number
     <div width={'foo'} />;
-         ~~~~~~~~~~~~~
-!!! error TS2326: Types of property 'width' are incompatible.
-!!! error TS2326:   Type 'string' is not assignable to type 'number'.
+         ~~~~~
+!!! error TS2322: Type 'string' is not assignable to type 'number'.
+!!! related TS6500 tests/cases/conformance/jsx/tsxAttributeErrors.tsx:6:4: The expected type comes from property 'width' which is declared here on type '{ text?: string; width?: number; }'
     
     // Error, number is not assignable to string
     var attribs = { text: 100 };

tests/baselines/reference/tsxAttributeResolution1.errors.txt

@@ -1,14 +1,11 @@
-tests/cases/conformance/jsx/file.tsx(23,8): error TS2326: Types of property 'x' are incompatible.
-  Type 'string' is not assignable to type 'number'.
+tests/cases/conformance/jsx/file.tsx(23,8): error TS2322: Type 'string' is not assignable to type 'number'.
 tests/cases/conformance/jsx/file.tsx(24,2): error TS2559: Type '{ y: number; }' has no properties in common with type 'Attribs1'.
 tests/cases/conformance/jsx/file.tsx(25,2): error TS2559: Type '{ y: string; }' has no properties in common with type 'Attribs1'.
-tests/cases/conformance/jsx/file.tsx(26,8): error TS2326: Types of property 'x' are incompatible.
-  Type 'string' is not assignable to type 'number'.
+tests/cases/conformance/jsx/file.tsx(26,8): error TS2322: Type 'string' is not assignable to type 'number'.
 tests/cases/conformance/jsx/file.tsx(27,2): error TS2559: Type '{ var: string; }' has no properties in common with type 'Attribs1'.
 tests/cases/conformance/jsx/file.tsx(29,2): error TS2322: Type '{}' is not assignable to type '{ reqd: string; }'.
   Property 'reqd' is missing in type '{}'.
-tests/cases/conformance/jsx/file.tsx(30,8): error TS2326: Types of property 'reqd' are incompatible.
-  Type 'number' is not assignable to type 'string'.
+tests/cases/conformance/jsx/file.tsx(30,8): error TS2322: Type 'number' is not assignable to type 'string'.
 
 
 ==== tests/cases/conformance/jsx/file.tsx (7 errors) ====
@@ -35,9 +32,9 @@ tests/cases/conformance/jsx/file.tsx(30,8): error TS2326: Types of property 'req
     
     // Errors
     <test1 x={'0'} />; // Error, '0' is not number
-           ~~~~~~~
-!!! error TS2326: Types of property 'x' are incompatible.
-!!! error TS2326:   Type 'string' is not assignable to type 'number'.
+           ~
+!!! error TS2322: Type 'string' is not assignable to type 'number'.
+!!! related TS6500 tests/cases/conformance/jsx/file.tsx:10:2: The expected type comes from property 'x' which is declared here on type 'Attribs1'
     <test1 y={0} />; // Error, no property "y"
      ~~~~~
 !!! error TS2559: Type '{ y: number; }' has no properties in common with type 'Attribs1'.
@@ -45,9 +42,9 @@ tests/cases/conformance/jsx/file.tsx(30,8): error TS2326: Types of property 'req
      ~~~~~
 !!! error TS2559: Type '{ y: string; }' has no properties in common with type 'Attribs1'.
     <test1 x="32" />; // Error, "32" is not number
-           ~~~~~~
-!!! error TS2326: Types of property 'x' are incompatible.
-!!! error TS2326:   Type 'string' is not assignable to type 'number'.
+           ~
+!!! error TS2322: Type 'string' is not assignable to type 'number'.
+!!! related TS6500 tests/cases/conformance/jsx/file.tsx:10:2: The expected type comes from property 'x' which is declared here on type 'Attribs1'
     <test1 var="10" />; // Error, no 'var' property
      ~~~~~
 !!! error TS2559: Type '{ var: string; }' has no properties in common with type 'Attribs1'.
@@ -57,9 +54,9 @@ tests/cases/conformance/jsx/file.tsx(30,8): error TS2326: Types of property 'req
 !!! error TS2322: Type '{}' is not assignable to type '{ reqd: string; }'.
 !!! error TS2322:   Property 'reqd' is missing in type '{}'.
     <test2 reqd={10} />; // Error, reqd is not string
-           ~~~~~~~~~
-!!! error TS2326: Types of property 'reqd' are incompatible.
-!!! error TS2326:   Type 'number' is not assignable to type 'string'.
+           ~~~~
+!!! error TS2322: Type 'number' is not assignable to type 'string'.
+!!! related TS6500 tests/cases/conformance/jsx/file.tsx:5:12: The expected type comes from property 'reqd' which is declared here on type '{ reqd: string; }'
     
     // Should be OK
     <var var='var' />;

tests/baselines/reference/tsxAttributeResolution10.errors.txt

@@ -1,5 +1,4 @@
-tests/cases/conformance/jsx/file.tsx(11,14): error TS2326: Types of property 'bar' are incompatible.
-  Type 'string' is not assignable to type 'boolean'.
+tests/cases/conformance/jsx/file.tsx(11,14): error TS2322: Type 'string' is not assignable to type 'boolean'.
 
 
 ==== tests/cases/conformance/jsx/react.d.ts (0 errors) ====
@@ -24,9 +23,9 @@ tests/cases/conformance/jsx/file.tsx(11,14): error TS2326: Types of property 'ba
     
     // Should be an error
     <MyComponent bar='world' />;
-                 ~~~~~~~~~~~
-!!! error TS2326: Types of property 'bar' are incompatible.
-!!! error TS2326:   Type 'string' is not assignable to type 'boolean'.
+                 ~~~
+!!! error TS2322: Type 'string' is not assignable to type 'boolean'.
+!!! related TS6501 tests/cases/conformance/jsx/file.tsx:6:4: The expected type comes from this index signature.
     
     // Should be OK
     <MyComponent bar={true} />;

tests/baselines/reference/tsxAttributeResolution14.errors.txt

@@ -1,7 +1,5 @@
-tests/cases/conformance/jsx/file.tsx(13,28): error TS2326: Types of property 'primaryText' are incompatible.
-  Type 'number' is not assignable to type 'string'.
-tests/cases/conformance/jsx/file.tsx(15,28): error TS2326: Types of property 'justRandomProp1' are incompatible.
-  Type 'boolean' is not assignable to type 'string | number'.
+tests/cases/conformance/jsx/file.tsx(13,28): error TS2322: Type 'number' is not assignable to type 'string'.
+tests/cases/conformance/jsx/file.tsx(15,28): error TS2322: Type 'true' is not assignable to type 'string | number'.
 
 
 ==== tests/cases/conformance/jsx/react.d.ts (0 errors) ====
@@ -27,14 +25,14 @@ tests/cases/conformance/jsx/file.tsx(15,28): error TS2326: Types of property 'ju
       return (
         <div>
           <VerticalNavMenuItem primaryText={2} />  // error
-                               ~~~~~~~~~~~~~~~
-!!! error TS2326: Types of property 'primaryText' are incompatible.
-!!! error TS2326:   Type 'number' is not assignable to type 'string'.
+                               ~~~~~~~~~~~
+!!! error TS2322: Type 'number' is not assignable to type 'string'.
+!!! related TS6500 tests/cases/conformance/jsx/file.tsx:2:3: The expected type comes from property 'primaryText' which is declared here on type 'IProps'
           <VerticalNavMenuItem justRandomProp={2} primaryText={"hello"} />  // ok
           <VerticalNavMenuItem justRandomProp1={true} primaryText={"hello"} />  // error
-                               ~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS2326: Types of property 'justRandomProp1' are incompatible.
-!!! error TS2326:   Type 'boolean' is not assignable to type 'string | number'.
+                               ~~~~~~~~~~~~~~~
+!!! error TS2322: Type 'true' is not assignable to type 'string | number'.
+!!! related TS6501 tests/cases/conformance/jsx/file.tsx:3:3: The expected type comes from this index signature.
         </div>
       )
     } 

tests/baselines/reference/tsxAttributeResolution3.errors.txt

@@ -3,8 +3,7 @@ tests/cases/conformance/jsx/file.tsx(19,2): error TS2322: Type '{ x: number; }'
     Type 'number' is not assignable to type 'string'.
 tests/cases/conformance/jsx/file.tsx(23,2): error TS2322: Type '{ y: number; }' is not assignable to type 'Attribs1'.
   Property 'x' is missing in type '{ y: number; }'.
-tests/cases/conformance/jsx/file.tsx(31,8): error TS2326: Types of property 'x' are incompatible.
-  Type 'number' is not assignable to type 'string'.
+tests/cases/conformance/jsx/file.tsx(31,8): error TS2322: Type 'number' is not assignable to type 'string'.
 
 
 ==== tests/cases/conformance/jsx/file.tsx (3 errors) ====
@@ -46,9 +45,9 @@ tests/cases/conformance/jsx/file.tsx(31,8): error TS2326: Types of property 'x'
     // Error
     var obj5 = { x: 32, y: 32 };
     <test1 x="ok" {...obj5} />
-           ~~~~~~
-!!! error TS2326: Types of property 'x' are incompatible.
-!!! error TS2326:   Type 'number' is not assignable to type 'string'.
+           ~
+!!! error TS2322: Type 'number' is not assignable to type 'string'.
+!!! related TS6500 tests/cases/conformance/jsx/file.tsx:8:2: The expected type comes from property 'x' which is declared here on type 'Attribs1'
     
     // Ok
     var obj6 = { x: 'ok', y: 32, extra: 100 };

tests/baselines/reference/tsxAttributeResolution6.errors.txt

@@ -1,7 +1,5 @@
-tests/cases/conformance/jsx/file.tsx(10,8): error TS2326: Types of property 's' are incompatible.
-  Type 'true' is not assignable to type 'string'.
-tests/cases/conformance/jsx/file.tsx(11,8): error TS2326: Types of property 'n' are incompatible.
-  Type 'string' is not assignable to type 'boolean'.
+tests/cases/conformance/jsx/file.tsx(10,8): error TS2322: Type 'true' is not assignable to type 'string'.
+tests/cases/conformance/jsx/file.tsx(11,8): error TS2322: Type 'string' is not assignable to type 'boolean'.
 tests/cases/conformance/jsx/file.tsx(12,2): error TS2322: Type '{}' is not assignable to type '{ n: boolean; }'.
   Property 'n' is missing in type '{}'.
 
@@ -18,12 +16,12 @@ tests/cases/conformance/jsx/file.tsx(12,2): error TS2322: Type '{}' is not assig
     // Error
     <test1 s />;
            ~
-!!! error TS2326: Types of property 's' are incompatible.
-!!! error TS2326:   Type 'true' is not assignable to type 'string'.
+!!! error TS2322: Type 'true' is not assignable to type 'string'.
+!!! related TS6500 tests/cases/conformance/jsx/file.tsx:4:25: The expected type comes from property 's' which is declared here on type '{ n?: boolean; s?: string; }'
     <test1 n='true' />;
-           ~~~~~~~~
-!!! error TS2326: Types of property 'n' are incompatible.
-!!! error TS2326:   Type 'string' is not assignable to type 'boolean'.
+           ~
+!!! error TS2322: Type 'string' is not assignable to type 'boolean'.
+!!! related TS6500 tests/cases/conformance/jsx/file.tsx:4:12: The expected type comes from property 'n' which is declared here on type '{ n?: boolean; s?: string; }'
     <test2 />;
      ~~~~~
 !!! error TS2322: Type '{}' is not assignable to type '{ n: boolean; }'.

tests/baselines/reference/tsxAttributeResolution7.errors.txt

@@ -1,5 +1,4 @@
-tests/cases/conformance/jsx/file.tsx(9,8): error TS2326: Types of property 'data-foo' are incompatible.
-  Type 'number' is not assignable to type 'string'.
+tests/cases/conformance/jsx/file.tsx(9,8): error TS2322: Type 'number' is not assignable to type 'string'.
 
 
 ==== tests/cases/conformance/jsx/file.tsx (1 errors) ====
@@ -12,9 +11,9 @@ tests/cases/conformance/jsx/file.tsx(9,8): error TS2326: Types of property 'data
     
     // Error
     <test1 data-foo={32} />;
-           ~~~~~~~~~~~~~
-!!! error TS2326: Types of property 'data-foo' are incompatible.
-!!! error TS2326:   Type 'number' is not assignable to type 'string'.
+           ~~~~~~~~
+!!! error TS2322: Type 'number' is not assignable to type 'string'.
+!!! related TS6500 tests/cases/conformance/jsx/file.tsx:4:12: The expected type comes from property 'data-foo' which is declared here on type '{ "data-foo"?: string; }'
     
     // OK
     <test1 data-foo={'32'} />;

tests/baselines/reference/tsxAttributeResolution9.errors.txt

@@ -1,5 +1,4 @@
-tests/cases/conformance/jsx/file.tsx(9,14): error TS2326: Types of property 'foo' are incompatible.
-  Type 'number' is not assignable to type 'string'.
+tests/cases/conformance/jsx/file.tsx(9,14): error TS2322: Type 'number' is not assignable to type 'string'.
 
 
 ==== tests/cases/conformance/jsx/react.d.ts (0 errors) ====
@@ -26,7 +25,7 @@ tests/cases/conformance/jsx/file.tsx(9,14): error TS2326: Types of property 'foo
     
     <MyComponent foo="bar" />; // ok  
     <MyComponent foo={0} />; // should be an error
-                 ~~~~~~~
-!!! error TS2326: Types of property 'foo' are incompatible.
-!!! error TS2326:   Type 'number' is not assignable to type 'string'.
+                 ~~~
+!!! error TS2322: Type 'number' is not assignable to type 'string'.
+!!! related TS6500 tests/cases/conformance/jsx/file.tsx:5:12: The expected type comes from property 'foo' which is declared here on type '{ foo: string; }'
     

tests/baselines/reference/tsxDeepAttributeAssignabilityError.errors.txt

@@ -0,0 +1,30 @@
+tests/cases/compiler/file1.tsx(5,5): error TS2322: Type 'number' is not assignable to type 'string'.
+
+
+==== tests/cases/compiler/my-component.tsx (0 errors) ====
+    import * as React from 'react'
+    
+    interface MyProps {
+        x: string;
+        y: MyInnerProps;
+    }
+    
+    interface MyInnerProps {
+        value: string;
+    }
+    
+    export function MyComponent(_props: MyProps) {
+        return <span>my component</span>;
+    }
+    
+==== tests/cases/compiler/file1.tsx (1 errors) ====
+    import * as React from 'react'
+    import { MyComponent } from './my-component'
+    
+    export const result = <MyComponent x="yes" y={{
+        value: 42
+        ~~~~~
+!!! error TS2322: Type 'number' is not assignable to type 'string'.
+!!! related TS6500 tests/cases/compiler/my-component.tsx:9:5: The expected type comes from property 'value' which is declared here on type 'MyInnerProps'
+    }} />;
+    

tests/baselines/reference/tsxDeepAttributeAssignabilityError.js

@@ -0,0 +1,43 @@
+//// [tests/cases/compiler/tsxDeepAttributeAssignabilityError.tsx] ////
+
+//// [my-component.tsx]
+import * as React from 'react'
+
+interface MyProps {
+    x: string;
+    y: MyInnerProps;
+}
+
+interface MyInnerProps {
+    value: string;
+}
+
+export function MyComponent(_props: MyProps) {
+    return <span>my component</span>;
+}
+
+//// [file1.tsx]
+import * as React from 'react'
+import { MyComponent } from './my-component'
+
+export const result = <MyComponent x="yes" y={{
+    value: 42
+}} />;
+
+
+//// [my-component.js]
+"use strict";
+exports.__esModule = true;
+var React = require("react");
+function MyComponent(_props) {
+    return React.createElement("span", null, "my component");
+}
+exports.MyComponent = MyComponent;
+//// [file1.js]
+"use strict";
+exports.__esModule = true;
+var React = require("react");
+var my_component_1 = require("./my-component");
+exports.result = React.createElement(my_component_1.MyComponent, { x: "yes", y: {
+        value: 42
+    } });

tests/baselines/reference/tsxDeepAttributeAssignabilityError.symbols

@@ -0,0 +1,50 @@
+=== tests/cases/compiler/my-component.tsx ===
+import * as React from 'react'
+>React : Symbol(React, Decl(my-component.tsx, 0, 6))
+
+interface MyProps {
+>MyProps : Symbol(MyProps, Decl(my-component.tsx, 0, 30))
+
+    x: string;
+>x : Symbol(MyProps.x, Decl(my-component.tsx, 2, 19))
+
+    y: MyInnerProps;
+>y : Symbol(MyProps.y, Decl(my-component.tsx, 3, 14))
+>MyInnerProps : Symbol(MyInnerProps, Decl(my-component.tsx, 5, 1))
+}
+
+interface MyInnerProps {
+>MyInnerProps : Symbol(MyInnerProps, Decl(my-component.tsx, 5, 1))
+
+    value: string;
+>value : Symbol(MyInnerProps.value, Decl(my-component.tsx, 7, 24))
+}
+
+export function MyComponent(_props: MyProps) {
+>MyComponent : Symbol(MyComponent, Decl(my-component.tsx, 9, 1))
+>_props : Symbol(_props, Decl(my-component.tsx, 11, 28))
+>MyProps : Symbol(MyProps, Decl(my-component.tsx, 0, 30))
+
+    return <span>my component</span>;
+>span : Symbol(JSX.IntrinsicElements.span, Decl(react.d.ts, 2461, 51))
+>span : Symbol(JSX.IntrinsicElements.span, Decl(react.d.ts, 2461, 51))
+}
+
+=== tests/cases/compiler/file1.tsx ===
+import * as React from 'react'
+>React : Symbol(React, Decl(file1.tsx, 0, 6))
+
+import { MyComponent } from './my-component'
+>MyComponent : Symbol(MyComponent, Decl(file1.tsx, 1, 8))
+
+export const result = <MyComponent x="yes" y={{
+>result : Symbol(result, Decl(file1.tsx, 3, 12))
+>MyComponent : Symbol(MyComponent, Decl(file1.tsx, 1, 8))
+>x : Symbol(x, Decl(file1.tsx, 3, 34))
+>y : Symbol(y, Decl(file1.tsx, 3, 42))
+
+    value: 42
+>value : Symbol(value, Decl(file1.tsx, 3, 47))
+
+}} />;
+

tests/baselines/reference/tsxDeepAttributeAssignabilityError.types

@@ -0,0 +1,54 @@
+=== tests/cases/compiler/my-component.tsx ===
+import * as React from 'react'
+>React : typeof React
+
+interface MyProps {
+>MyProps : MyProps
+
+    x: string;
+>x : string
+
+    y: MyInnerProps;
+>y : MyInnerProps
+>MyInnerProps : MyInnerProps
+}
+
+interface MyInnerProps {
+>MyInnerProps : MyInnerProps
+
+    value: string;
+>value : string
+}
+
+export function MyComponent(_props: MyProps) {
+>MyComponent : (_props: MyProps) => JSX.Element
+>_props : MyProps
+>MyProps : MyProps
+
+    return <span>my component</span>;
+><span>my component</span> : JSX.Element
+>span : any
+>span : any
+}
+
+=== tests/cases/compiler/file1.tsx ===
+import * as React from 'react'
+>React : typeof React
+
+import { MyComponent } from './my-component'
+>MyComponent : (_props: MyProps) => JSX.Element
+
+export const result = <MyComponent x="yes" y={{
+>result : JSX.Element
+><MyComponent x="yes" y={{    value: 42}} /> : JSX.Element
+>MyComponent : (_props: MyProps) => JSX.Element
+>x : string
+>y : { value: number; }
+>{    value: 42} : { value: number; }
+
+    value: 42
+>value : number
+>42 : 42
+
+}} />;
+

tests/baselines/reference/tsxDefaultAttributesResolution3.errors.txt

@@ -1,5 +1,4 @@
-tests/cases/conformance/jsx/file.tsx(13,19): error TS2326: Types of property 'x' are incompatible.
-  Type 'true' is not assignable to type 'false'.
+tests/cases/conformance/jsx/file.tsx(13,19): error TS2322: Type 'true' is not assignable to type 'false'.
 
 
 ==== tests/cases/conformance/jsx/file.tsx (1 errors) ====
@@ -17,5 +16,5 @@ tests/cases/conformance/jsx/file.tsx(13,19): error TS2326: Types of property 'x'
     // Error
     let p = <Poisoned x/>;
                       ~
-!!! error TS2326: Types of property 'x' are incompatible.
-!!! error TS2326:   Type 'true' is not assignable to type 'false'.
+!!! error TS2322: Type 'true' is not assignable to type 'false'.
+!!! related TS6500 tests/cases/conformance/jsx/file.tsx:4:5: The expected type comes from property 'x' which is declared here on type 'IntrinsicAttributes & IntrinsicClassAttributes<Poisoned> & Prop & { children?: ReactNode; }'

tests/baselines/reference/tsxElementResolution12.errors.txt

@@ -2,8 +2,7 @@ tests/cases/conformance/jsx/file.tsx(23,1): error TS2607: JSX element class does
 tests/cases/conformance/jsx/file.tsx(23,7): error TS2339: Property 'x' does not exist on type '{}'.
 tests/cases/conformance/jsx/file.tsx(25,1): error TS2607: JSX element class does not support attributes because it does not have a 'pr' property.
 tests/cases/conformance/jsx/file.tsx(26,1): error TS2607: JSX element class does not support attributes because it does not have a 'pr' property.
-tests/cases/conformance/jsx/file.tsx(33,7): error TS2326: Types of property 'x' are incompatible.
-  Type 'string' is not assignable to type 'number'.
+tests/cases/conformance/jsx/file.tsx(33,7): error TS2322: Type 'string' is not assignable to type 'number'.
 
 
 ==== tests/cases/conformance/jsx/file.tsx (5 errors) ====
@@ -48,7 +47,7 @@ tests/cases/conformance/jsx/file.tsx(33,7): error TS2326: Types of property 'x'
     var Obj4: Obj4type;
     <Obj4 x={10} />; // OK
     <Obj4 x={'10'} />; // Error
-          ~~~~~~~~
-!!! error TS2326: Types of property 'x' are incompatible.
-!!! error TS2326:   Type 'string' is not assignable to type 'number'.
+          ~
+!!! error TS2322: Type 'string' is not assignable to type 'number'.
+!!! related TS6500 tests/cases/conformance/jsx/file.tsx:29:37: The expected type comes from property 'x' which is declared here on type '{ x: number; }'
     

tests/baselines/reference/tsxLibraryManagedAttributes.errors.txt

@@ -2,30 +2,21 @@ tests/cases/conformance/jsx/tsxLibraryManagedAttributes.tsx(55,12): error TS2322
   Type '{ foo: number; }' is not assignable to type '{ bar: string | number | ReactComponent<{}, {}> | null | undefined; baz: string; }'.
     Property 'bar' is missing in type '{ foo: number; }'.
 tests/cases/conformance/jsx/tsxLibraryManagedAttributes.tsx(57,41): error TS2339: Property 'bat' does not exist on type 'Defaultize<InferredPropTypes<{ foo: PropTypeChecker<number, false>; bar: PropTypeChecker<ReactNode, false>; baz: PropTypeChecker<string, true>; }>, { foo: number; }>'.
-tests/cases/conformance/jsx/tsxLibraryManagedAttributes.tsx(59,42): error TS2326: Types of property 'baz' are incompatible.
-  Type 'null' is not assignable to type 'string'.
-tests/cases/conformance/jsx/tsxLibraryManagedAttributes.tsx(69,26): error TS2326: Types of property 'foo' are incompatible.
-  Type 'string' is not assignable to type 'number | null | undefined'.
-tests/cases/conformance/jsx/tsxLibraryManagedAttributes.tsx(71,35): error TS2326: Types of property 'bar' are incompatible.
-  Type 'null' is not assignable to type 'ReactNode'.
+tests/cases/conformance/jsx/tsxLibraryManagedAttributes.tsx(59,42): error TS2322: Type 'null' is not assignable to type 'string'.
+tests/cases/conformance/jsx/tsxLibraryManagedAttributes.tsx(69,26): error TS2322: Type 'string' is not assignable to type 'number | null | undefined'.
+tests/cases/conformance/jsx/tsxLibraryManagedAttributes.tsx(71,35): error TS2322: Type 'null' is not assignable to type 'ReactNode'.
 tests/cases/conformance/jsx/tsxLibraryManagedAttributes.tsx(80,38): error TS2339: Property 'bar' does not exist on type 'Defaultize<{}, { foo: number; }>'.
-tests/cases/conformance/jsx/tsxLibraryManagedAttributes.tsx(81,29): error TS2326: Types of property 'foo' are incompatible.
-  Type 'string' is not assignable to type 'number | undefined'.
+tests/cases/conformance/jsx/tsxLibraryManagedAttributes.tsx(81,29): error TS2322: Type 'string' is not assignable to type 'number | undefined'.
 tests/cases/conformance/jsx/tsxLibraryManagedAttributes.tsx(98,12): error TS2322: Type '{ foo: string; }' is not assignable to type 'Defaultize<FooProps & InferredPropTypes<{ foo: PropTypeChecker<string, false>; bar: PropTypeChecker<ReactNode, false>; baz: PropTypeChecker<number, true>; }>, { foo: string; }>'.
   Type '{ foo: string; }' is not assignable to type '{ bar: string | number | ReactComponent<{}, {}> | null | undefined; baz: number; }'.
     Property 'bar' is missing in type '{ foo: string; }'.
 tests/cases/conformance/jsx/tsxLibraryManagedAttributes.tsx(100,56): error TS2339: Property 'bat' does not exist on type 'Defaultize<FooProps & InferredPropTypes<{ foo: PropTypeChecker<string, false>; bar: PropTypeChecker<ReactNode, false>; baz: PropTypeChecker<number, true>; }>, { foo: string; }>'.
-tests/cases/conformance/jsx/tsxLibraryManagedAttributes.tsx(102,57): error TS2326: Types of property 'baz' are incompatible.
-  Type 'null' is not assignable to type 'number'.
-tests/cases/conformance/jsx/tsxLibraryManagedAttributes.tsx(111,46): error TS2326: Types of property 'foo' are incompatible.
-  Type 'number' is not assignable to type 'string'.
-tests/cases/conformance/jsx/tsxLibraryManagedAttributes.tsx(112,46): error TS2326: Types of property 'foo' are incompatible.
-  Type 'null' is not assignable to type 'string'.
-tests/cases/conformance/jsx/tsxLibraryManagedAttributes.tsx(113,57): error TS2326: Types of property 'bar' are incompatible.
-  Type 'null' is not assignable to type 'ReactNode'.
+tests/cases/conformance/jsx/tsxLibraryManagedAttributes.tsx(102,57): error TS2322: Type 'null' is not assignable to type 'number'.
+tests/cases/conformance/jsx/tsxLibraryManagedAttributes.tsx(111,46): error TS2322: Type 'number' is not assignable to type 'string'.
+tests/cases/conformance/jsx/tsxLibraryManagedAttributes.tsx(112,46): error TS2322: Type 'null' is not assignable to type 'string'.
+tests/cases/conformance/jsx/tsxLibraryManagedAttributes.tsx(113,57): error TS2322: Type 'null' is not assignable to type 'ReactNode'.
 tests/cases/conformance/jsx/tsxLibraryManagedAttributes.tsx(122,58): error TS2339: Property 'bar' does not exist on type 'Defaultize<FooProps, { foo: string; }>'.
-tests/cases/conformance/jsx/tsxLibraryManagedAttributes.tsx(123,49): error TS2326: Types of property 'foo' are incompatible.
-  Type 'number' is not assignable to type 'string | undefined'.
+tests/cases/conformance/jsx/tsxLibraryManagedAttributes.tsx(123,49): error TS2322: Type 'number' is not assignable to type 'string | undefined'.
 
 
 ==== tests/cases/conformance/jsx/tsxLibraryManagedAttributes.tsx (15 errors) ====
@@ -94,9 +85,8 @@ tests/cases/conformance/jsx/tsxLibraryManagedAttributes.tsx(123,49): error TS232
 !!! error TS2339: Property 'bat' does not exist on type 'Defaultize<InferredPropTypes<{ foo: PropTypeChecker<number, false>; bar: PropTypeChecker<ReactNode, false>; baz: PropTypeChecker<string, true>; }>, { foo: number; }>'.
     const e = <Component foo={12} bar={null} baz="cool" />; // bar is nullable/undefinable since it's not marked `isRequired`
     const f = <Component foo={12} bar="yeah" baz={null} />; // Error, baz is _not_ nullable/undefinable since it's marked `isRequired`
-                                             ~~~~~~~~~~
-!!! error TS2326: Types of property 'baz' are incompatible.
-!!! error TS2326:   Type 'null' is not assignable to type 'string'.
+                                             ~~~
+!!! error TS2322: Type 'null' is not assignable to type 'string'.
     
     class JustPropTypes extends ReactComponent {
         static propTypes = {
@@ -107,14 +97,14 @@ tests/cases/conformance/jsx/tsxLibraryManagedAttributes.tsx(123,49): error TS232
     
     const g = <JustPropTypes foo={12} bar="ok" />;
     const h = <JustPropTypes foo="no" />; // error, wrong type
-                             ~~~~~~~~
-!!! error TS2326: Types of property 'foo' are incompatible.
-!!! error TS2326:   Type 'string' is not assignable to type 'number | null | undefined'.
+                             ~~~
+!!! error TS2322: Type 'string' is not assignable to type 'number | null | undefined'.
+!!! related TS6500 tests/cases/conformance/jsx/tsxLibraryManagedAttributes.tsx:63:9: The expected type comes from property 'foo' which is declared here on type 'InferredPropTypes<{ foo: PropTypeChecker<number, false>; bar: PropTypeChecker<ReactNode, true>; }>'
     const i = <JustPropTypes foo={null} bar="ok" />;
     const j = <JustPropTypes foo={12} bar={null} />; // error, bar is required
-                                      ~~~~~~~~~~
-!!! error TS2326: Types of property 'bar' are incompatible.
-!!! error TS2326:   Type 'null' is not assignable to type 'ReactNode'.
+                                      ~~~
+!!! error TS2322: Type 'null' is not assignable to type 'ReactNode'.
+!!! related TS6500 tests/cases/conformance/jsx/tsxLibraryManagedAttributes.tsx:64:9: The expected type comes from property 'bar' which is declared here on type 'InferredPropTypes<{ foo: PropTypeChecker<number, false>; bar: PropTypeChecker<ReactNode, true>; }>'
     
     class JustDefaultProps extends ReactComponent {
         static defaultProps = {
@@ -127,9 +117,9 @@ tests/cases/conformance/jsx/tsxLibraryManagedAttributes.tsx(123,49): error TS232
                                          ~~~~~~~~
 !!! error TS2339: Property 'bar' does not exist on type 'Defaultize<{}, { foo: number; }>'.
     const m = <JustDefaultProps foo="no" />; // error, wrong type
-                                ~~~~~~~~
-!!! error TS2326: Types of property 'foo' are incompatible.
-!!! error TS2326:   Type 'string' is not assignable to type 'number | undefined'.
+                                ~~~
+!!! error TS2322: Type 'string' is not assignable to type 'number | undefined'.
+!!! related TS6500 tests/cases/conformance/jsx/tsxLibraryManagedAttributes.tsx:75:9: The expected type comes from property 'foo' which is declared here on type 'Defaultize<{}, { foo: number; }>'
     
     interface FooProps {
         foo: string;
@@ -157,9 +147,8 @@ tests/cases/conformance/jsx/tsxLibraryManagedAttributes.tsx(123,49): error TS232
 !!! error TS2339: Property 'bat' does not exist on type 'Defaultize<FooProps & InferredPropTypes<{ foo: PropTypeChecker<string, false>; bar: PropTypeChecker<ReactNode, false>; baz: PropTypeChecker<number, true>; }>, { foo: string; }>'.
     const r = <BothWithSpecifiedGeneric foo="no" bar={null} baz={0} />; // bar is nullable/undefinable since it's not marked `isRequired`
     const s = <BothWithSpecifiedGeneric foo="eh" bar="yeah" baz={null} />; // Error, baz is _not_ nullable/undefinable since it's marked `isRequired`
-                                                            ~~~~~~~~~~
-!!! error TS2326: Types of property 'baz' are incompatible.
-!!! error TS2326:   Type 'null' is not assignable to type 'number'.
+                                                            ~~~
+!!! error TS2322: Type 'null' is not assignable to type 'number'.
     
     class JustPropTypesWithSpecifiedGeneric extends ReactComponent<FooProps> {
         static propTypes = {
@@ -169,17 +158,17 @@ tests/cases/conformance/jsx/tsxLibraryManagedAttributes.tsx(123,49): error TS232
     }
     const t = <JustPropTypesWithSpecifiedGeneric foo="nice" bar="ok" />;
     const u = <JustPropTypesWithSpecifiedGeneric foo={12} />; // error, wrong type
-                                                 ~~~~~~~~
-!!! error TS2326: Types of property 'foo' are incompatible.
-!!! error TS2326:   Type 'number' is not assignable to type 'string'.
+                                                 ~~~
+!!! error TS2322: Type 'number' is not assignable to type 'string'.
+!!! related TS6500 tests/cases/conformance/jsx/tsxLibraryManagedAttributes.tsx:84:5: The expected type comes from property 'foo' which is declared here on type 'FooProps & InferredPropTypes<{ foo: PropTypeChecker<string, false>; bar: PropTypeChecker<ReactNode, true>; }>'
     const v = <JustPropTypesWithSpecifiedGeneric foo={null} bar="ok" />; // generic overrides propTypes required-ness, null isn't valid
-                                                 ~~~~~~~~~~
-!!! error TS2326: Types of property 'foo' are incompatible.
-!!! error TS2326:   Type 'null' is not assignable to type 'string'.
+                                                 ~~~
+!!! error TS2322: Type 'null' is not assignable to type 'string'.
+!!! related TS6500 tests/cases/conformance/jsx/tsxLibraryManagedAttributes.tsx:84:5: The expected type comes from property 'foo' which is declared here on type 'FooProps & InferredPropTypes<{ foo: PropTypeChecker<string, false>; bar: PropTypeChecker<ReactNode, true>; }>'
     const w = <JustPropTypesWithSpecifiedGeneric foo="cool" bar={null} />; // error, bar is required
-                                                            ~~~~~~~~~~
-!!! error TS2326: Types of property 'bar' are incompatible.
-!!! error TS2326:   Type 'null' is not assignable to type 'ReactNode'.
+                                                            ~~~
+!!! error TS2322: Type 'null' is not assignable to type 'ReactNode'.
+!!! related TS6500 tests/cases/conformance/jsx/tsxLibraryManagedAttributes.tsx:107:9: The expected type comes from property 'bar' which is declared here on type 'FooProps & InferredPropTypes<{ foo: PropTypeChecker<string, false>; bar: PropTypeChecker<ReactNode, true>; }>'
     
     class JustDefaultPropsWithSpecifiedGeneric extends ReactComponent<FooProps> {
         static defaultProps = {
@@ -192,8 +181,8 @@ tests/cases/conformance/jsx/tsxLibraryManagedAttributes.tsx(123,49): error TS232
                                                              ~~~~~~~~
 !!! error TS2339: Property 'bar' does not exist on type 'Defaultize<FooProps, { foo: string; }>'.
     const z = <JustDefaultPropsWithSpecifiedGeneric foo={12} />; // error, wrong type
-                                                    ~~~~~~~~
-!!! error TS2326: Types of property 'foo' are incompatible.
-!!! error TS2326:   Type 'number' is not assignable to type 'string | undefined'.
+                                                    ~~~
+!!! error TS2322: Type 'number' is not assignable to type 'string | undefined'.
+!!! related TS6500 tests/cases/conformance/jsx/tsxLibraryManagedAttributes.tsx:117:9: The expected type comes from property 'foo' which is declared here on type 'Defaultize<FooProps, { foo: string; }>'
     const aa = <JustDefaultPropsWithSpecifiedGeneric />;
     

tests/baselines/reference/tsxReactComponentWithDefaultTypeParameter3.errors.txt

@@ -1,7 +1,6 @@
 tests/cases/conformance/jsx/file.tsx(13,11): error TS2322: Type '{}' is not assignable to type 'Prop'.
   Property 'a' is missing in type '{}'.
-tests/cases/conformance/jsx/file.tsx(19,18): error TS2326: Types of property 'a' are incompatible.
-  Type 'string' is not assignable to type 'number'.
+tests/cases/conformance/jsx/file.tsx(19,18): error TS2322: Type 'string' is not assignable to type 'number'.
 
 
 ==== tests/cases/conformance/jsx/file.tsx (2 errors) ====
@@ -27,6 +26,6 @@ tests/cases/conformance/jsx/file.tsx(19,18): error TS2326: Types of property 'a'
     
     // Error
     let x2 = <MyComp a="hi"/>
-                     ~~~~~~
-!!! error TS2326: Types of property 'a' are incompatible.
-!!! error TS2326:   Type 'string' is not assignable to type 'number'.
+                     ~
+!!! error TS2322: Type 'string' is not assignable to type 'number'.
+!!! related TS6500 tests/cases/conformance/jsx/file.tsx:4:5: The expected type comes from property 'a' which is declared here on type 'IntrinsicAttributes & IntrinsicClassAttributes<MyComp<Prop>> & Prop & { children?: ReactNode; }'

tests/baselines/reference/tsxSpreadAttributesResolution10.errors.txt

@@ -1,11 +1,7 @@
-tests/cases/conformance/jsx/file.tsx(19,23): error TS2326: Types of property 'x' are incompatible.
-  Type '3' is not assignable to type '2'.
-tests/cases/conformance/jsx/file.tsx(20,25): error TS2326: Types of property 'x' are incompatible.
-  Type 'string' is not assignable to type '2'.
-tests/cases/conformance/jsx/file.tsx(21,25): error TS2326: Types of property 'x' are incompatible.
-  Type '3' is not assignable to type '2'.
-tests/cases/conformance/jsx/file.tsx(22,15): error TS2326: Types of property 'x' are incompatible.
-  Type 'true' is not assignable to type '2'.
+tests/cases/conformance/jsx/file.tsx(19,23): error TS2322: Type '3' is not assignable to type '2'.
+tests/cases/conformance/jsx/file.tsx(20,25): error TS2322: Type 'string' is not assignable to type '2'.
+tests/cases/conformance/jsx/file.tsx(21,25): error TS2322: Type '3' is not assignable to type '2'.
+tests/cases/conformance/jsx/file.tsx(22,15): error TS2322: Type 'true' is not assignable to type '2'.
 
 
 ==== tests/cases/conformance/jsx/file.tsx (4 errors) ====
@@ -28,19 +24,19 @@ tests/cases/conformance/jsx/file.tsx(22,15): error TS2326: Types of property 'x'
     
     // Error
     let y = <Opt {...obj} x={3}/>;
-                          ~~~~~
-!!! error TS2326: Types of property 'x' are incompatible.
-!!! error TS2326:   Type '3' is not assignable to type '2'.
+                          ~
+!!! error TS2322: Type '3' is not assignable to type '2'.
+!!! related TS6500 tests/cases/conformance/jsx/file.tsx:4:5: The expected type comes from property 'x' which is declared here on type 'IntrinsicAttributes & IntrinsicClassAttributes<Opt> & OptionProp & { children?: ReactNode; }'
     let y1 = <Opt {...obj1} x="Hi"/>;
-                            ~~~~~~
-!!! error TS2326: Types of property 'x' are incompatible.
-!!! error TS2326:   Type 'string' is not assignable to type '2'.
+                            ~
+!!! error TS2322: Type 'string' is not assignable to type '2'.
+!!! related TS6500 tests/cases/conformance/jsx/file.tsx:4:5: The expected type comes from property 'x' which is declared here on type 'IntrinsicAttributes & IntrinsicClassAttributes<Opt> & OptionProp & { children?: ReactNode; }'
     let y2 = <Opt {...obj1} x={3}/>;
-                            ~~~~~
-!!! error TS2326: Types of property 'x' are incompatible.
-!!! error TS2326:   Type '3' is not assignable to type '2'.
+                            ~
+!!! error TS2322: Type '3' is not assignable to type '2'.
+!!! related TS6500 tests/cases/conformance/jsx/file.tsx:4:5: The expected type comes from property 'x' which is declared here on type 'IntrinsicAttributes & IntrinsicClassAttributes<Opt> & OptionProp & { children?: ReactNode; }'
     let y3 = <Opt x />;
                   ~
-!!! error TS2326: Types of property 'x' are incompatible.
-!!! error TS2326:   Type 'true' is not assignable to type '2'.
+!!! error TS2322: Type 'true' is not assignable to type '2'.
+!!! related TS6500 tests/cases/conformance/jsx/file.tsx:4:5: The expected type comes from property 'x' which is declared here on type 'IntrinsicAttributes & IntrinsicClassAttributes<Opt> & OptionProp & { children?: ReactNode; }'
     

tests/baselines/reference/tsxSpreadAttributesResolution12.errors.txt

@@ -1,7 +1,5 @@
-tests/cases/conformance/jsx/file.tsx(27,33): error TS2326: Types of property 'y' are incompatible.
-  Type 'true' is not assignable to type 'false'.
-tests/cases/conformance/jsx/file.tsx(28,50): error TS2326: Types of property 'x' are incompatible.
-  Type '3' is not assignable to type '2'.
+tests/cases/conformance/jsx/file.tsx(27,33): error TS2322: Type 'true' is not assignable to type 'false'.
+tests/cases/conformance/jsx/file.tsx(28,50): error TS2322: Type '3' is not assignable to type '2'.
 tests/cases/conformance/jsx/file.tsx(30,11): error TS2322: Type '{ y: true; x: 2; overwrite: string; }' is not assignable to type 'Prop'.
   Types of property 'y' are incompatible.
     Type 'true' is not assignable to type 'false'.
@@ -36,12 +34,12 @@ tests/cases/conformance/jsx/file.tsx(30,11): error TS2322: Type '{ y: true; x: 2
     // Error
     let x = <OverWriteAttr {...obj} y overwrite="hi" {...obj1} />
                                     ~
-!!! error TS2326: Types of property 'y' are incompatible.
-!!! error TS2326:   Type 'true' is not assignable to type 'false'.
+!!! error TS2322: Type 'true' is not assignable to type 'false'.
+!!! related TS6500 tests/cases/conformance/jsx/file.tsx:14:5: The expected type comes from property 'y' which is declared here on type 'IntrinsicAttributes & IntrinsicClassAttributes<OverWriteAttr> & Prop & { children?: ReactNode; }'
     let x1 = <OverWriteAttr overwrite="hi" {...obj1} x={3} {...{y: true}} />
-                                                     ~~~~~
-!!! error TS2326: Types of property 'x' are incompatible.
-!!! error TS2326:   Type '3' is not assignable to type '2'.
+                                                     ~
+!!! error TS2322: Type '3' is not assignable to type '2'.
+!!! related TS6500 tests/cases/conformance/jsx/file.tsx:13:5: The expected type comes from property 'x' which is declared here on type 'IntrinsicAttributes & IntrinsicClassAttributes<OverWriteAttr> & Prop & { children?: ReactNode; }'
     let x2 = <OverWriteAttr {...anyobj} x={3} />
     let x3 = <OverWriteAttr overwrite="hi" {...obj1} {...{y: true}} />
               ~~~~~~~~~~~~~

tests/baselines/reference/tsxSpreadAttributesResolution2.errors.txt

@@ -2,10 +2,8 @@ tests/cases/conformance/jsx/file.tsx(17,10): error TS2322: Type '{}' is not assi
   Property 'x' is missing in type '{}'.
 tests/cases/conformance/jsx/file.tsx(18,10): error TS2322: Type '{}' is not assignable to type 'PoisonedProp'.
   Property 'x' is missing in type '{}'.
-tests/cases/conformance/jsx/file.tsx(19,19): error TS2326: Types of property 'x' are incompatible.
-  Type 'true' is not assignable to type 'string'.
-tests/cases/conformance/jsx/file.tsx(19,21): error TS2326: Types of property 'y' are incompatible.
-  Type 'true' is not assignable to type '"2"'.
+tests/cases/conformance/jsx/file.tsx(19,19): error TS2322: Type 'true' is not assignable to type 'string'.
+tests/cases/conformance/jsx/file.tsx(19,21): error TS2322: Type 'true' is not assignable to type '"2"'.
 tests/cases/conformance/jsx/file.tsx(20,10): error TS2322: Type '{ x: number; y: "2"; }' is not assignable to type 'PoisonedProp'.
   Types of property 'x' are incompatible.
     Type 'number' is not assignable to type 'string'.
@@ -41,11 +39,11 @@ tests/cases/conformance/jsx/file.tsx(21,11): error TS2322: Type '{ X: string; x:
 !!! error TS2322:   Property 'x' is missing in type '{}'.
     let z = <Poisoned x y/>;
                       ~
-!!! error TS2326: Types of property 'x' are incompatible.
-!!! error TS2326:   Type 'true' is not assignable to type 'string'.
+!!! error TS2322: Type 'true' is not assignable to type 'string'.
+!!! related TS6500 tests/cases/conformance/jsx/file.tsx:4:5: The expected type comes from property 'x' which is declared here on type 'IntrinsicAttributes & IntrinsicClassAttributes<Poisoned> & PoisonedProp & { children?: ReactNode; }'
                         ~
-!!! error TS2326: Types of property 'y' are incompatible.
-!!! error TS2326:   Type 'true' is not assignable to type '"2"'.
+!!! error TS2322: Type 'true' is not assignable to type '"2"'.
+!!! related TS6500 tests/cases/conformance/jsx/file.tsx:5:5: The expected type comes from property 'y' which is declared here on type 'IntrinsicAttributes & IntrinsicClassAttributes<Poisoned> & PoisonedProp & { children?: ReactNode; }'
     let w = <Poisoned {...{x: 5, y: "2"}}/>;
              ~~~~~~~~
 !!! error TS2322: Type '{ x: number; y: "2"; }' is not assignable to type 'PoisonedProp'.

tests/baselines/reference/tsxStatelessFunctionComponentOverload4.errors.txt

@@ -2,24 +2,18 @@ tests/cases/conformance/jsx/file.tsx(12,13): error TS2322: Type '{ extraProp: tr
   Property 'yy' is missing in type '{ extraProp: true; }'.
 tests/cases/conformance/jsx/file.tsx(13,13): error TS2322: Type '{ yy: number; }' is not assignable to type '{ yy: number; yy1: string; }'.
   Property 'yy1' is missing in type '{ yy: number; }'.
-tests/cases/conformance/jsx/file.tsx(14,31): error TS2326: Types of property 'yy1' are incompatible.
-  Type 'true' is not assignable to type 'string'.
+tests/cases/conformance/jsx/file.tsx(14,31): error TS2322: Type 'true' is not assignable to type 'string'.
 tests/cases/conformance/jsx/file.tsx(16,31): error TS2339: Property 'y1' does not exist on type 'IntrinsicAttributes & { yy: number; yy1: string; }'.
 tests/cases/conformance/jsx/file.tsx(17,13): error TS2322: Type '{ yy: boolean; yy1: string; }' is not assignable to type '{ yy: number; yy1: string; }'.
   Types of property 'yy' are incompatible.
     Type 'boolean' is not assignable to type 'number'.
 tests/cases/conformance/jsx/file.tsx(25,13): error TS2322: Type '{ extra-data: true; }' is not assignable to type '{ yy: string; direction?: number; }'.
   Property 'yy' is missing in type '{ extra-data: true; }'.
-tests/cases/conformance/jsx/file.tsx(26,40): error TS2326: Types of property 'direction' are incompatible.
-  Type 'string' is not assignable to type 'number'.
-tests/cases/conformance/jsx/file.tsx(33,32): error TS2326: Types of property 'y3' are incompatible.
-  Type 'string' is not assignable to type 'boolean'.
-tests/cases/conformance/jsx/file.tsx(34,29): error TS2326: Types of property 'y1' are incompatible.
-  Type 'string' is not assignable to type 'boolean'.
-tests/cases/conformance/jsx/file.tsx(35,29): error TS2326: Types of property 'y1' are incompatible.
-  Type 'string' is not assignable to type 'boolean'.
-tests/cases/conformance/jsx/file.tsx(36,29): error TS2326: Types of property 'y1' are incompatible.
-  Type 'string' is not assignable to type 'boolean'.
+tests/cases/conformance/jsx/file.tsx(26,40): error TS2322: Type 'string' is not assignable to type 'number'.
+tests/cases/conformance/jsx/file.tsx(33,32): error TS2322: Type 'string' is not assignable to type 'boolean'.
+tests/cases/conformance/jsx/file.tsx(34,29): error TS2322: Type 'string' is not assignable to type 'boolean'.
+tests/cases/conformance/jsx/file.tsx(35,29): error TS2322: Type 'string' is not assignable to type 'boolean'.
+tests/cases/conformance/jsx/file.tsx(36,29): error TS2322: Type 'string' is not assignable to type 'boolean'.
 
 
 ==== tests/cases/conformance/jsx/file.tsx (11 errors) ====
@@ -44,8 +38,8 @@ tests/cases/conformance/jsx/file.tsx(36,29): error TS2326: Types of property 'y1
 !!! error TS2322:   Property 'yy1' is missing in type '{ yy: number; }'.
     const c2 = <OneThing {...obj} yy1 />; // type incompatible;
                                   ~~~
-!!! error TS2326: Types of property 'yy1' are incompatible.
-!!! error TS2326:   Type 'true' is not assignable to type 'string'.
+!!! error TS2322: Type 'true' is not assignable to type 'string'.
+!!! related TS6500 tests/cases/conformance/jsx/file.tsx:3:43: The expected type comes from property 'yy1' which is declared here on type 'IntrinsicAttributes & { yy: number; yy1: string; }'
     const c3 = <OneThing {...obj} {...{extra: "extra attr"}} />;  //  This is OK becuase all attribute are spread
     const c4 = <OneThing {...obj} y1={10000} />;  // extra property;
                                   ~~~~~~~~~~
@@ -67,9 +61,9 @@ tests/cases/conformance/jsx/file.tsx(36,29): error TS2326: Types of property 'y1
 !!! error TS2322: Type '{ extra-data: true; }' is not assignable to type '{ yy: string; direction?: number; }'.
 !!! error TS2322:   Property 'yy' is missing in type '{ extra-data: true; }'.
     const d2 = <TestingOneThing yy="hello" direction="left" />
-                                           ~~~~~~~~~~~~~~~~
-!!! error TS2326: Types of property 'direction' are incompatible.
-!!! error TS2326:   Type 'string' is not assignable to type 'number'.
+                                           ~~~~~~~~~
+!!! error TS2322: Type 'string' is not assignable to type 'number'.
+!!! related TS6500 tests/cases/conformance/jsx/file.tsx:22:50: The expected type comes from property 'direction' which is declared here on type 'IntrinsicAttributes & { yy: string; direction?: number; }'
     
     declare function TestingOptional(a: {y1?: string, y2?: number}): JSX.Element;
     declare function TestingOptional(a: {y1?: string, y2?: number, children: JSX.Element}): JSX.Element;
@@ -77,19 +71,19 @@ tests/cases/conformance/jsx/file.tsx(36,29): error TS2326: Types of property 'y1
     
     // Error
     const e1 = <TestingOptional y1 y3="hello"/>
-                                   ~~~~~~~~~~
-!!! error TS2326: Types of property 'y3' are incompatible.
-!!! error TS2326:   Type 'string' is not assignable to type 'boolean'.
+                                   ~~
+!!! error TS2322: Type 'string' is not assignable to type 'boolean'.
+!!! related TS6500 tests/cases/conformance/jsx/file.tsx:30:64: The expected type comes from property 'y3' which is declared here on type 'IntrinsicAttributes & { y1: boolean; y2?: number; y3: boolean; }'
     const e2 = <TestingOptional y1="hello" y2={1000} y3 />
-                                ~~~~~~~~~~
-!!! error TS2326: Types of property 'y1' are incompatible.
-!!! error TS2326:   Type 'string' is not assignable to type 'boolean'.
+                                ~~
+!!! error TS2322: Type 'string' is not assignable to type 'boolean'.
+!!! related TS6500 tests/cases/conformance/jsx/file.tsx:30:38: The expected type comes from property 'y1' which is declared here on type 'IntrinsicAttributes & { y1: boolean; y2?: number; y3: boolean; }'
     const e3 = <TestingOptional y1="hello" y2={1000} children="hi" />
-                                ~~~~~~~~~~
-!!! error TS2326: Types of property 'y1' are incompatible.
-!!! error TS2326:   Type 'string' is not assignable to type 'boolean'.
+                                ~~
+!!! error TS2322: Type 'string' is not assignable to type 'boolean'.
+!!! related TS6500 tests/cases/conformance/jsx/file.tsx:30:38: The expected type comes from property 'y1' which is declared here on type 'IntrinsicAttributes & { y1: boolean; y2?: number; y3: boolean; }'
     const e4 = <TestingOptional y1="hello" y2={1000}>Hi</TestingOptional>
-                                ~~~~~~~~~~
-!!! error TS2326: Types of property 'y1' are incompatible.
-!!! error TS2326:   Type 'string' is not assignable to type 'boolean'.
+                                ~~
+!!! error TS2322: Type 'string' is not assignable to type 'boolean'.
+!!! related TS6500 tests/cases/conformance/jsx/file.tsx:30:38: The expected type comes from property 'y1' which is declared here on type 'IntrinsicAttributes & { y1: boolean; y2?: number; y3: boolean; }'
     

tests/baselines/reference/tsxStatelessFunctionComponentOverload5.errors.txt

@@ -8,12 +8,9 @@ tests/cases/conformance/jsx/file.tsx(51,13): error TS2322: Type '{ onClick: (k:
   Property '"data-format"' is missing in type '{ onClick: (k: MouseEvent<any>) => void; to: string; }'.
 tests/cases/conformance/jsx/file.tsx(53,13): error TS2322: Type '{ to: string; onClick(e: any): void; }' is not assignable to type 'HyphenProps'.
   Property '"data-format"' is missing in type '{ to: string; onClick(e: any): void; }'.
-tests/cases/conformance/jsx/file.tsx(54,51): error TS2326: Types of property 'children' are incompatible.
-  Type 'number' is not assignable to type 'string'.
-tests/cases/conformance/jsx/file.tsx(55,68): error TS2326: Types of property 'className' are incompatible.
-  Type 'true' is not assignable to type 'string'.
-tests/cases/conformance/jsx/file.tsx(56,24): error TS2326: Types of property 'data-format' are incompatible.
-  Type 'true' is not assignable to type 'string'.
+tests/cases/conformance/jsx/file.tsx(54,51): error TS2322: Type 'number' is not assignable to type 'string'.
+tests/cases/conformance/jsx/file.tsx(55,68): error TS2322: Type 'true' is not assignable to type 'string'.
+tests/cases/conformance/jsx/file.tsx(56,24): error TS2322: Type 'true' is not assignable to type 'string'.
 
 
 ==== tests/cases/conformance/jsx/file.tsx (8 errors) ====
@@ -86,14 +83,14 @@ tests/cases/conformance/jsx/file.tsx(56,24): error TS2326: Types of property 'da
 !!! error TS2322: Type '{ to: string; onClick(e: any): void; }' is not assignable to type 'HyphenProps'.
 !!! error TS2322:   Property '"data-format"' is missing in type '{ to: string; onClick(e: any): void; }'.
     const b6 = <MainButton {...{ onClick(e: any){} }} children={10} />;  // incorrect type for optional attribute
-                                                      ~~~~~~~~~~~~~
-!!! error TS2326: Types of property 'children' are incompatible.
-!!! error TS2326:   Type 'number' is not assignable to type 'string'.
+                                                      ~~~~~~~~
+!!! error TS2322: Type 'number' is not assignable to type 'string'.
+!!! related TS6500 tests/cases/conformance/jsx/file.tsx:4:5: The expected type comes from property 'children' which is declared here on type 'IntrinsicAttributes & HyphenProps'
     const b7 = <MainButton {...{ onClick(e: any){} }} children="hello" className />;  // incorrect type for optional attribute
                                                                        ~~~~~~~~~
-!!! error TS2326: Types of property 'className' are incompatible.
-!!! error TS2326:   Type 'true' is not assignable to type 'string'.
+!!! error TS2322: Type 'true' is not assignable to type 'string'.
+!!! related TS6500 tests/cases/conformance/jsx/file.tsx:5:5: The expected type comes from property 'className' which is declared here on type 'IntrinsicAttributes & HyphenProps'
     const b8 = <MainButton data-format />;  // incorrect type for specified hyphanated name
                            ~~~~~~~~~~~
-!!! error TS2326: Types of property 'data-format' are incompatible.
-!!! error TS2326:   Type 'true' is not assignable to type 'string'.
+!!! error TS2322: Type 'true' is not assignable to type 'string'.
+!!! related TS6500 tests/cases/conformance/jsx/file.tsx:17:5: The expected type comes from property 'data-format' which is declared here on type 'IntrinsicAttributes & HyphenProps'

tests/baselines/reference/tsxStatelessFunctionComponentWithDefaultTypeParameter2.errors.txt

@@ -1,5 +1,4 @@
-tests/cases/conformance/jsx/file.tsx(13,24): error TS2326: Types of property 'values' are incompatible.
-  Type 'number' is not assignable to type 'string'.
+tests/cases/conformance/jsx/file.tsx(13,24): error TS2322: Type 'number' is not assignable to type 'string'.
 
 
 ==== tests/cases/conformance/jsx/file.tsx (1 errors) ====
@@ -16,6 +15,6 @@ tests/cases/conformance/jsx/file.tsx(13,24): error TS2326: Types of property 'va
     
     // Error
     let i1 = <MyComponent1 values={5}/>;
-                           ~~~~~~~~~~
-!!! error TS2326: Types of property 'values' are incompatible.
-!!! error TS2326:   Type 'number' is not assignable to type 'string'.
+                           ~~~~~~
+!!! error TS2322: Type 'number' is not assignable to type 'string'.
+!!! related TS6500 tests/cases/conformance/jsx/file.tsx:4:5: The expected type comes from property 'values' which is declared here on type 'IntrinsicAttributes & MyComponentProp'

tests/baselines/reference/tsxStatelessFunctionComponents1.errors.txt

@@ -1,7 +1,6 @@
 tests/cases/conformance/jsx/file.tsx(19,10): error TS2322: Type '{ naaame: string; }' is not assignable to type '{ name: string; }'.
   Property 'name' is missing in type '{ naaame: string; }'.
-tests/cases/conformance/jsx/file.tsx(27,15): error TS2326: Types of property 'name' are incompatible.
-  Type 'number' is not assignable to type 'string'.
+tests/cases/conformance/jsx/file.tsx(27,15): error TS2322: Type 'number' is not assignable to type 'string'.
 tests/cases/conformance/jsx/file.tsx(29,10): error TS2559: Type '{ naaaaaaame: string; }' has no properties in common with type 'IntrinsicAttributes & { name?: string; }'.
 tests/cases/conformance/jsx/file.tsx(34,10): error TS2322: Type '{ extra-prop-name: string; }' is not assignable to type '{ "prop-name": string; }'.
   Property '"prop-name"' is missing in type '{ extra-prop-name: string; }'.
@@ -42,9 +41,8 @@ tests/cases/conformance/jsx/file.tsx(45,11): error TS2559: Type '{ prop1: boolea
     let d = <Meet name='me' />;
     // Error
     let e = <Meet name={42} />;
-                  ~~~~~~~~~
-!!! error TS2326: Types of property 'name' are incompatible.
-!!! error TS2326:   Type 'number' is not assignable to type 'string'.
+                  ~~~~
+!!! error TS2322: Type 'number' is not assignable to type 'string'.
     // Error
     let f = <Meet naaaaaaame='no' />;
              ~~~~

tests/baselines/reference/tsxStatelessFunctionComponentsWithTypeArguments2.errors.txt

@@ -1,14 +1,10 @@
-tests/cases/conformance/jsx/file.tsx(8,43): error TS2326: Types of property 'ignore-prop' are incompatible.
-  Type '(T & { ignore-prop: number; })["ignore-prop"]' is not assignable to type 'string'.
-    Type 'number' is not assignable to type 'string'.
+tests/cases/conformance/jsx/file.tsx(8,43): error TS2322: Type '10' is not assignable to type 'string'.
 tests/cases/conformance/jsx/file.tsx(13,15): error TS2322: Type 'T' is not assignable to type 'IntrinsicAttributes & { prop: {}; "ignore-prop": string; }'.
   Type 'T' is not assignable to type '{ prop: {}; "ignore-prop": string; }'.
-tests/cases/conformance/jsx/file.tsx(20,19): error TS2326: Types of property 'func' are incompatible.
-  Type '(a: number, b: string) => void' is not assignable to type '(arg: number) => void'.
-tests/cases/conformance/jsx/file.tsx(31,52): error TS2326: Types of property 'selectHandler' are incompatible.
-  Type '(val: string) => void' is not assignable to type '(selectedVal: number) => void'.
-    Types of parameters 'val' and 'selectedVal' are incompatible.
-      Type 'number' is not assignable to type 'string'.
+tests/cases/conformance/jsx/file.tsx(20,19): error TS2322: Type '(a: number, b: string) => void' is not assignable to type '(arg: number) => void'.
+tests/cases/conformance/jsx/file.tsx(31,52): error TS2322: Type '(val: string) => void' is not assignable to type '(selectedVal: number) => void'.
+  Types of parameters 'val' and 'selectedVal' are incompatible.
+    Type 'number' is not assignable to type 'string'.
 
 
 ==== tests/cases/conformance/jsx/file.tsx (4 errors) ====
@@ -20,10 +16,9 @@ tests/cases/conformance/jsx/file.tsx(31,52): error TS2326: Types of property 'se
     // Error
     function Bar<T extends {prop: number}>(arg: T) {
         let a1 = <ComponentSpecific1 {...arg} ignore-prop={10} />;
-                                              ~~~~~~~~~~~~~~~~
-!!! error TS2326: Types of property 'ignore-prop' are incompatible.
-!!! error TS2326:   Type '(T & { ignore-prop: number; })["ignore-prop"]' is not assignable to type 'string'.
-!!! error TS2326:     Type 'number' is not assignable to type 'string'.
+                                              ~~~~~~~~~~~
+!!! error TS2322: Type '10' is not assignable to type 'string'.
+!!! related TS6500 tests/cases/conformance/jsx/file.tsx:3:53: The expected type comes from property 'ignore-prop' which is declared here on type 'IntrinsicAttributes & { prop: number; "ignore-prop": string; }'
      }
     
     // Error
@@ -39,9 +34,9 @@ tests/cases/conformance/jsx/file.tsx(31,52): error TS2326: Types of property 'se
     // Error
     function createLink(func: (a: number, b: string)=>void) {
         let o = <Link func={func} />
-                      ~~~~~~~~~~~
-!!! error TS2326: Types of property 'func' are incompatible.
-!!! error TS2326:   Type '(a: number, b: string) => void' is not assignable to type '(arg: number) => void'.
+                      ~~~~
+!!! error TS2322: Type '(a: number, b: string) => void' is not assignable to type '(arg: number) => void'.
+!!! related TS6500 tests/cases/conformance/jsx/file.tsx:16:30: The expected type comes from property 'func' which is declared here on type 'IntrinsicAttributes & { func: (arg: number) => void; }'
     }
     
     interface InferParamProp<T> {
@@ -53,9 +48,9 @@ tests/cases/conformance/jsx/file.tsx(31,52): error TS2326: Types of property 'se
     
     // Error
     let i = <InferParamComponent values={[1, 2, 3, 4]} selectHandler={(val: string) => { }} />;
-                                                       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS2326: Types of property 'selectHandler' are incompatible.
-!!! error TS2326:   Type '(val: string) => void' is not assignable to type '(selectedVal: number) => void'.
-!!! error TS2326:     Types of parameters 'val' and 'selectedVal' are incompatible.
-!!! error TS2326:       Type 'number' is not assignable to type 'string'.
+                                                       ~~~~~~~~~~~~~
+!!! error TS2322: Type '(val: string) => void' is not assignable to type '(selectedVal: number) => void'.
+!!! error TS2322:   Types of parameters 'val' and 'selectedVal' are incompatible.
+!!! error TS2322:     Type 'number' is not assignable to type 'string'.
+!!! related TS6500 tests/cases/conformance/jsx/file.tsx:25:5: The expected type comes from property 'selectHandler' which is declared here on type 'IntrinsicAttributes & InferParamProp<number>'
     

tests/baselines/reference/tsxTypeArgumentPartialDefinitionStillErrors.errors.txt

@@ -1,5 +1,4 @@
-tests/cases/compiler/file.tsx(11,14): error TS2326: Types of property 'prop' are incompatible.
-  Type 'number' is not assignable to type 'string'.
+tests/cases/compiler/file.tsx(11,14): error TS2322: Type 'number' is not assignable to type 'string'.
 
 
 ==== tests/cases/compiler/file.tsx (1 errors) ====
@@ -14,7 +13,7 @@ tests/cases/compiler/file.tsx(11,14): error TS2326: Types of property 'prop' are
     }
     
     <SFC<string> prop={1}></SFC>; // should error
-                 ~~~~~~~~
-!!! error TS2326: Types of property 'prop' are incompatible.
-!!! error TS2326:   Type 'number' is not assignable to type 'string'.
+                 ~~~~
+!!! error TS2322: Type 'number' is not assignable to type 'string'.
+!!! related TS6500 /.ts/lib.es5.d.ts:1382:39: The expected type comes from property 'prop' which is declared here on type 'Record<string, string>'
     

tests/baselines/reference/tsxTypeArgumentResolution.errors.txt

@@ -1,7 +1,5 @@
-tests/cases/conformance/jsx/file.tsx(16,26): error TS2326: Types of property 'b' are incompatible.
-  Type 'number' is not assignable to type 'string'.
-tests/cases/conformance/jsx/file.tsx(18,26): error TS2326: Types of property 'b' are incompatible.
-  Type 'number' is not assignable to type 'string'.
+tests/cases/conformance/jsx/file.tsx(16,26): error TS2322: Type 'number' is not assignable to type 'string'.
+tests/cases/conformance/jsx/file.tsx(18,26): error TS2322: Type 'number' is not assignable to type 'string'.
 tests/cases/conformance/jsx/file.tsx(20,13): error TS2558: Expected 1 type arguments, but got 2.
 tests/cases/conformance/jsx/file.tsx(22,13): error TS2558: Expected 1 type arguments, but got 2.
 tests/cases/conformance/jsx/file.tsx(24,12): error TS1099: Type argument list cannot be empty.
@@ -9,19 +7,15 @@ tests/cases/conformance/jsx/file.tsx(26,12): error TS1099: Type argument list ca
 tests/cases/conformance/jsx/file.tsx(39,14): error TS2344: Type 'Prop' does not satisfy the constraint '{ a: string; }'.
   Types of property 'a' are incompatible.
     Type 'number' is not assignable to type 'string'.
-tests/cases/conformance/jsx/file.tsx(39,20): error TS2326: Types of property 'a' are incompatible.
-  Type 'number' is not assignable to type 'string'.
+tests/cases/conformance/jsx/file.tsx(39,20): error TS2322: Type 'number' is not assignable to type 'string'.
 tests/cases/conformance/jsx/file.tsx(41,14): error TS2344: Type 'Prop' does not satisfy the constraint '{ a: string; }'.
-tests/cases/conformance/jsx/file.tsx(41,20): error TS2326: Types of property 'a' are incompatible.
-  Type 'number' is not assignable to type 'string'.
+tests/cases/conformance/jsx/file.tsx(41,20): error TS2322: Type 'number' is not assignable to type 'string'.
 tests/cases/conformance/jsx/file.tsx(47,14): error TS2558: Expected 1-2 type arguments, but got 3.
 tests/cases/conformance/jsx/file.tsx(47,53): error TS2339: Property 'b' does not exist on type 'IntrinsicAttributes & IntrinsicClassAttributes<MyComp2<{ a: string; }, {}>> & { a: string; } & { children?: ReactNode; }'.
 tests/cases/conformance/jsx/file.tsx(49,14): error TS2558: Expected 1-2 type arguments, but got 3.
 tests/cases/conformance/jsx/file.tsx(49,53): error TS2339: Property 'b' does not exist on type 'IntrinsicAttributes & IntrinsicClassAttributes<MyComp2<{ a: string; }, {}>> & { a: string; } & { children?: ReactNode; }'.
-tests/cases/conformance/jsx/file.tsx(51,47): error TS2326: Types of property 'b' are incompatible.
-  Type 'string' is not assignable to type 'number'.
-tests/cases/conformance/jsx/file.tsx(53,47): error TS2326: Types of property 'b' are incompatible.
-  Type 'string' is not assignable to type 'number'.
+tests/cases/conformance/jsx/file.tsx(51,47): error TS2322: Type 'string' is not assignable to type 'number'.
+tests/cases/conformance/jsx/file.tsx(53,47): error TS2322: Type 'string' is not assignable to type 'number'.
 
 
 ==== tests/cases/conformance/jsx/file.tsx (16 errors) ====
@@ -41,14 +35,14 @@ tests/cases/conformance/jsx/file.tsx(53,47): error TS2326: Types of property 'b'
     x = <MyComp<Prop> a={10} b="hi"></MyComp>; // OK
     
     x = <MyComp<Prop> a={10} b={20} />; // error
-                             ~~~~~~
-!!! error TS2326: Types of property 'b' are incompatible.
-!!! error TS2326:   Type 'number' is not assignable to type 'string'.
+                             ~
+!!! error TS2322: Type 'number' is not assignable to type 'string'.
+!!! related TS6500 tests/cases/conformance/jsx/file.tsx:5:5: The expected type comes from property 'b' which is declared here on type 'IntrinsicAttributes & IntrinsicClassAttributes<MyComp<Prop>> & Prop & { children?: ReactNode; }'
     
     x = <MyComp<Prop> a={10} b={20}></MyComp>; // error
-                             ~~~~~~
-!!! error TS2326: Types of property 'b' are incompatible.
-!!! error TS2326:   Type 'number' is not assignable to type 'string'.
+                             ~
+!!! error TS2322: Type 'number' is not assignable to type 'string'.
+!!! related TS6500 tests/cases/conformance/jsx/file.tsx:5:5: The expected type comes from property 'b' which is declared here on type 'IntrinsicAttributes & IntrinsicClassAttributes<MyComp<Prop>> & Prop & { children?: ReactNode; }'
     
     x = <MyComp<Prop, Prop> a={10} b="hi" />; // error
                 ~~~~~~~~~~
@@ -82,16 +76,16 @@ tests/cases/conformance/jsx/file.tsx(53,47): error TS2326: Types of property 'b'
 !!! error TS2344: Type 'Prop' does not satisfy the constraint '{ a: string; }'.
 !!! error TS2344:   Types of property 'a' are incompatible.
 !!! error TS2344:     Type 'number' is not assignable to type 'string'.
-                       ~~~~~~
-!!! error TS2326: Types of property 'a' are incompatible.
-!!! error TS2326:   Type 'number' is not assignable to type 'string'.
+                       ~
+!!! error TS2322: Type 'number' is not assignable to type 'string'.
+!!! related TS6500 tests/cases/conformance/jsx/file.tsx:32:35: The expected type comes from property 'a' which is declared here on type 'IntrinsicAttributes & IntrinsicClassAttributes<MyComp2<{ a: string; }, {}>> & { a: string; } & { children?: ReactNode; }'
     
     x = <MyComp2<Prop> a={10} b="hi"></MyComp2>; // error
                  ~~~~
 !!! error TS2344: Type 'Prop' does not satisfy the constraint '{ a: string; }'.
-                       ~~~~~~
-!!! error TS2326: Types of property 'a' are incompatible.
-!!! error TS2326:   Type 'number' is not assignable to type 'string'.
+                       ~
+!!! error TS2322: Type 'number' is not assignable to type 'string'.
+!!! related TS6500 tests/cases/conformance/jsx/file.tsx:32:35: The expected type comes from property 'a' which is declared here on type 'IntrinsicAttributes & IntrinsicClassAttributes<MyComp2<{ a: string; }, {}>> & { a: string; } & { children?: ReactNode; }'
     
     x = <MyComp2<{a: string}, {b: string}> a="hi" b="hi" />; // OK
     
@@ -110,12 +104,12 @@ tests/cases/conformance/jsx/file.tsx(53,47): error TS2326: Types of property 'b'
 !!! error TS2339: Property 'b' does not exist on type 'IntrinsicAttributes & IntrinsicClassAttributes<MyComp2<{ a: string; }, {}>> & { a: string; } & { children?: ReactNode; }'.
     
     x = <MyComp2<{a: string}, {b: number}> a="hi" b="hi" />; // error
-                                                  ~~~~~~
-!!! error TS2326: Types of property 'b' are incompatible.
-!!! error TS2326:   Type 'string' is not assignable to type 'number'.
+                                                  ~
+!!! error TS2322: Type 'string' is not assignable to type 'number'.
+!!! related TS6500 tests/cases/conformance/jsx/file.tsx:51:28: The expected type comes from property 'b' which is declared here on type 'IntrinsicAttributes & IntrinsicClassAttributes<MyComp2<{ a: string; }, { b: number; }>> & { a: string; } & { b: number; } & { children?: ReactNode; }'
     
     x = <MyComp2<{a: string}, {b: number}> a="hi" b="hi"></MyComp2>; // error
-                                                  ~~~~~~
-!!! error TS2326: Types of property 'b' are incompatible.
-!!! error TS2326:   Type 'string' is not assignable to type 'number'.
+                                                  ~
+!!! error TS2322: Type 'string' is not assignable to type 'number'.
+!!! related TS6500 tests/cases/conformance/jsx/file.tsx:53:28: The expected type comes from property 'b' which is declared here on type 'IntrinsicAttributes & IntrinsicClassAttributes<MyComp2<{ a: string; }, { b: number; }>> & { a: string; } & { b: number; } & { children?: ReactNode; }'
     

tests/baselines/reference/tsxUnionElementType2.errors.txt

@@ -1,5 +1,4 @@
-tests/cases/conformance/jsx/file.tsx(12,10): error TS2326: Types of property 'x' are incompatible.
-  Type 'string' is not assignable to type 'number | boolean'.
+tests/cases/conformance/jsx/file.tsx(12,10): error TS2322: Type 'string' is not assignable to type 'number | boolean'.
 
 
 ==== tests/cases/conformance/jsx/file.tsx (1 errors) ====
@@ -15,6 +14,6 @@ tests/cases/conformance/jsx/file.tsx(12,10): error TS2326: Types of property 'x'
     
     var SFCComp = SFC1 || SFC2;
     <SFCComp x={"hi"}/>
-             ~~~~~~~~
-!!! error TS2326: Types of property 'x' are incompatible.
-!!! error TS2326:   Type 'string' is not assignable to type 'number | boolean'.
+             ~
+!!! error TS2322: Type 'string' is not assignable to type 'number | boolean'.
+!!! related TS6500 tests/cases/conformance/jsx/file.tsx:3:23: The expected type comes from property 'x' which is declared here on type '(IntrinsicAttributes & { x: number; }) | (IntrinsicAttributes & { x: boolean; })'

tests/baselines/reference/tsxUnionElementType4.errors.txt

@@ -1,5 +1,4 @@
-tests/cases/conformance/jsx/file.tsx(32,17): error TS2326: Types of property 'x' are incompatible.
-  Type 'true' is not assignable to type 'ReactText'.
+tests/cases/conformance/jsx/file.tsx(32,17): error TS2322: Type 'true' is not assignable to type 'ReactText'.
 tests/cases/conformance/jsx/file.tsx(33,10): error TS2559: Type '{ x: number; }' has no properties in common with type 'IntrinsicAttributes & IntrinsicClassAttributes<RC4> & { children?: ReactNode; }'.
 tests/cases/conformance/jsx/file.tsx(34,10): error TS2559: Type '{ prop: true; }' has no properties in common with type 'IntrinsicAttributes & IntrinsicClassAttributes<RC3> & { children?: ReactNode; }'.
 
@@ -38,8 +37,8 @@ tests/cases/conformance/jsx/file.tsx(34,10): error TS2559: Type '{ prop: true; }
     // Error
     let a = <RCComp x />;
                     ~
-!!! error TS2326: Types of property 'x' are incompatible.
-!!! error TS2326:   Type 'true' is not assignable to type 'ReactText'.
+!!! error TS2322: Type 'true' is not assignable to type 'ReactText'.
+!!! related TS6500 tests/cases/conformance/jsx/file.tsx:3:36: The expected type comes from property 'x' which is declared here on type '(IntrinsicAttributes & IntrinsicClassAttributes<RC1> & { x: number; } & { children?: ReactNode; }) | (IntrinsicAttributes & IntrinsicClassAttributes<RC2> & { x: string; } & { children?: ReactNode; })'
     let b = <PartRCComp x={10} />
              ~~~~~~~~~~
 !!! error TS2559: Type '{ x: number; }' has no properties in common with type 'IntrinsicAttributes & IntrinsicClassAttributes<RC4> & { children?: ReactNode; }'.

tests/baselines/reference/tsxUnionElementType6.errors.txt

@@ -1,6 +1,5 @@
 tests/cases/conformance/jsx/file.tsx(18,10): error TS2559: Type '{ x: true; }' has no properties in common with type 'IntrinsicAttributes'.
-tests/cases/conformance/jsx/file.tsx(19,27): error TS2326: Types of property 'x' are incompatible.
-  Type 'string' is not assignable to type 'boolean'.
+tests/cases/conformance/jsx/file.tsx(19,27): error TS2322: Type 'string' is not assignable to type 'boolean'.
 tests/cases/conformance/jsx/file.tsx(20,10): error TS2322: Type '{}' is not assignable to type '{ x: boolean; }'.
   Property 'x' is missing in type '{}'.
 tests/cases/conformance/jsx/file.tsx(21,10): error TS2322: Type '{ data-prop: true; }' is not assignable to type '{ x: boolean; }'.
@@ -29,9 +28,9 @@ tests/cases/conformance/jsx/file.tsx(21,10): error TS2322: Type '{ data-prop: tr
              ~~~~~~~~~~~~
 !!! error TS2559: Type '{ x: true; }' has no properties in common with type 'IntrinsicAttributes'.
     let b = <SFC2AndEmptyComp x="hi" />;
-                              ~~~~~~
-!!! error TS2326: Types of property 'x' are incompatible.
-!!! error TS2326:   Type 'string' is not assignable to type 'boolean'.
+                              ~
+!!! error TS2322: Type 'string' is not assignable to type 'boolean'.
+!!! related TS6500 tests/cases/conformance/jsx/file.tsx:11:23: The expected type comes from property 'x' which is declared here on type 'IntrinsicAttributes & { x: boolean; }'
     let c = <SFC2AndEmptyComp />;
              ~~~~~~~~~~~~~~~~
 !!! error TS2322: Type '{}' is not assignable to type '{ x: boolean; }'.

tests/baselines/reference/tupleTypes.errors.txt

@@ -2,8 +2,8 @@ tests/cases/compiler/tupleTypes.ts(14,1): error TS2322: Type '[]' is not assigna
   Property '0' is missing in type '[]'.
 tests/cases/compiler/tupleTypes.ts(15,1): error TS2322: Type '[number]' is not assignable to type '[number, string]'.
   Property '1' is missing in type '[number]'.
-tests/cases/compiler/tupleTypes.ts(17,1): error TS2322: Type '[string, number]' is not assignable to type '[number, string]'.
-  Type 'string' is not assignable to type 'number'.
+tests/cases/compiler/tupleTypes.ts(17,6): error TS2322: Type 'string' is not assignable to type 'number'.
+tests/cases/compiler/tupleTypes.ts(17,15): error TS2322: Type 'number' is not assignable to type 'string'.
 tests/cases/compiler/tupleTypes.ts(18,1): error TS2322: Type '[number, string, number]' is not assignable to type '[number, string]'.
   Types of property 'length' are incompatible.
     Type '3' is not assignable to type '2'.
@@ -24,7 +24,7 @@ tests/cases/compiler/tupleTypes.ts(51,1): error TS2322: Type '[number, {}]' is n
   Type '{}' is not assignable to type 'string'.
 
 
-==== tests/cases/compiler/tupleTypes.ts (9 errors) ====
+==== tests/cases/compiler/tupleTypes.ts (10 errors) ====
     var v1: [];  // Error
     var v2: [number];
     var v3: [number, string];
@@ -48,9 +48,10 @@ tests/cases/compiler/tupleTypes.ts(51,1): error TS2322: Type '[number, {}]' is n
 !!! error TS2322:   Property '1' is missing in type '[number]'.
     t = [1, "hello"];     // Ok
     t = ["hello", 1];     // Error
-    ~
-!!! error TS2322: Type '[string, number]' is not assignable to type '[number, string]'.
-!!! error TS2322:   Type 'string' is not assignable to type 'number'.
+         ~~~~~~~
+!!! error TS2322: Type 'string' is not assignable to type 'number'.
+                  ~
+!!! error TS2322: Type 'number' is not assignable to type 'string'.
     t = [1, "hello", 2];  // Error
     ~
 !!! error TS2322: Type '[number, string, number]' is not assignable to type '[number, string]'.

tests/baselines/reference/uniqueSymbolAllowsIndexInObjectWithIndexSignature.errors.txt

@@ -1,6 +1,4 @@
-tests/cases/compiler/uniqueSymbolAllowsIndexInObjectWithIndexSignature.ts(10,5): error TS2322: Type '{ [SYM]: "str"; }' is not assignable to type 'I'.
-  Types of property '[SYM]' are incompatible.
-    Type '"str"' is not assignable to type '"sym"'.
+tests/cases/compiler/uniqueSymbolAllowsIndexInObjectWithIndexSignature.ts(10,13): error TS2418: Type of computed property's value is '"str"', which is not assignable to type '"sym"'.
 
 
 ==== tests/cases/compiler/uniqueSymbolAllowsIndexInObjectWithIndexSignature.ts (1 errors) ====
@@ -14,8 +12,7 @@ tests/cases/compiler/uniqueSymbolAllowsIndexInObjectWithIndexSignature.ts(10,5):
     
     let a: I = {[SYM]: 'sym'}; // Expect ok
     let b: I = {[SYM]: 'str'}; // Expect error
-        ~
-!!! error TS2322: Type '{ [SYM]: "str"; }' is not assignable to type 'I'.
-!!! error TS2322:   Types of property '[SYM]' are incompatible.
-!!! error TS2322:     Type '"str"' is not assignable to type '"sym"'.
+                ~~~~~
+!!! error TS2418: Type of computed property's value is '"str"', which is not assignable to type '"sym"'.
+!!! related TS6500 tests/cases/compiler/uniqueSymbolAllowsIndexInObjectWithIndexSignature.ts:5:3: The expected type comes from property 'unique symbol' which is declared here on type 'I'
     

tests/baselines/reference/widenedTypes.errors.txt

@@ -7,9 +7,7 @@ tests/cases/compiler/widenedTypes.ts(10,1): error TS2322: Type '""' is not assig
 tests/cases/compiler/widenedTypes.ts(17,1): error TS2322: Type '""' is not assignable to type 'number'.
 tests/cases/compiler/widenedTypes.ts(22,5): error TS2322: Type 'number[]' is not assignable to type 'string[]'.
   Type 'number' is not assignable to type 'string'.
-tests/cases/compiler/widenedTypes.ts(23,5): error TS2322: Type '{ x: number; y: null; }' is not assignable to type '{ [x: string]: string; }'.
-  Property 'x' is incompatible with index signature.
-    Type 'number' is not assignable to type 'string'.
+tests/cases/compiler/widenedTypes.ts(23,39): error TS2322: Type 'number' is not assignable to type 'string'.
 
 
 ==== tests/cases/compiler/widenedTypes.ts (9 errors) ====
@@ -53,7 +51,6 @@ tests/cases/compiler/widenedTypes.ts(23,5): error TS2322: Type '{ x: number; y:
 !!! error TS2322: Type 'number[]' is not assignable to type 'string[]'.
 !!! error TS2322:   Type 'number' is not assignable to type 'string'.
     var obj: { [x: string]: string; } = { x: 3, y: null }; // assignable because null is widened, and therefore BCT is any
-        ~~~
-!!! error TS2322: Type '{ x: number; y: null; }' is not assignable to type '{ [x: string]: string; }'.
-!!! error TS2322:   Property 'x' is incompatible with index signature.
-!!! error TS2322:     Type 'number' is not assignable to type 'string'.
+                                          ~
+!!! error TS2322: Type 'number' is not assignable to type 'string'.
+!!! related TS6501 tests/cases/compiler/widenedTypes.ts:23:12: The expected type comes from this index signature.

tests/cases/compiler/deeplyNestedAssignabilityIssue.ts

@@ -0,0 +1,30 @@
+// @pretty: true
+interface A {
+    a: number;
+}
+
+interface Large {
+    something: {
+        another: {
+            more: {
+                thing: A;
+            }
+            yetstill: {
+                another: A;
+            }
+        }
+    }
+}
+
+const x: Large = {
+    something: {
+        another: {
+            more: {
+                thing: {}
+            },
+            yetstill: {
+                another: {}
+            }
+        }
+    }
+}

tests/cases/compiler/slightlyIndirectedDeepObjectLiteralElaborations.ts

@@ -0,0 +1,20 @@
+interface Foo {
+    a: {
+        b: {
+            c: {
+                d: string
+            }
+        }
+    }
+}
+
+let q: Foo["a"] | undefined;
+const x: Foo = (void 0, {
+    a: q = {
+        b: ({
+            c: {
+                d: 42
+            }
+        })
+    }
+});

tests/cases/compiler/tsxDeepAttributeAssignabilityError.tsx

@@ -0,0 +1,29 @@
+// @jsx: react
+// @noLib: true
+// @skipLibCheck: true
+// @libFiles: react.d.ts,lib.d.ts
+
+// @Filename: my-component.tsx
+import * as React from 'react'
+
+interface MyProps {
+    x: string;
+    y: MyInnerProps;
+}
+
+interface MyInnerProps {
+    value: string;
+}
+
+export function MyComponent(_props: MyProps) {
+    return <span>my component</span>;
+}
+
+// @Filename: file1.tsx
+
+import * as React from 'react'
+import { MyComponent } from './my-component'
+
+export const result = <MyComponent x="yes" y={{
+    value: 42
+}} />;