fix type lookup rule

src/compiler/checker.ts

@@ -1234,7 +1234,7 @@ namespace ts {
                                     lastLocation.kind === SyntaxKind.Parameter ||
                                     (
                                         lastLocation === (<FunctionLikeDeclaration>location).type &&
-                                        result.valueDeclaration.kind === SyntaxKind.Parameter
+                                        !!findAncestor(result.valueDeclaration, isParameter)
                                     );
                             }
                         }