Merge branch 'fix11857' of https://github.com/RyanCavanaugh/TypeScript into RyanCavanaugh-fix11857

Author: mhegazy

src/compiler/checker.ts

@@ -16852,9 +16852,10 @@ namespace ts {
                     // in a JS file
                     // Note:JS inferred classes might come from a variable declaration instead of a function declaration.
                     // In this case, using getResolvedSymbol directly is required to avoid losing the members from the declaration.
-                    const funcSymbol = node.expression.kind === SyntaxKind.Identifier ?
-                        getResolvedSymbol(node.expression as Identifier) :
-                        checkExpression(node.expression).symbol;
+                    let funcSymbol = checkExpression(node.expression).symbol;
+                    if (!funcSymbol && node.expression.kind === SyntaxKind.Identifier) {
+                        funcSymbol = getResolvedSymbol(node.expression as Identifier);
+                    }
                     const type = funcSymbol && getJavaScriptClassType(funcSymbol);
                     if (type) {
                         return type;

tests/cases/fourslash/indirectClassInstantiation.ts

@@ -0,0 +1,21 @@
+/// <reference path="fourslash.ts" />
+
+// @allowJs: true
+// @Filename: something.js
+//// function TestObj(){
+////     this.property = "value";
+//// }
+//// var constructor = TestObj;
+//// var instance = new constructor();
+//// instance./*a*/
+//// var class2 = function() { };
+//// class2.prototype.blah = function() { };
+//// var inst2 = new class2();
+//// inst2.blah/*b*/;
+
+goTo.marker('a');
+verify.completionListContains('property');
+edit.backspace();
+
+goTo.marker('b');
+verify.quickInfoIs('(property) class2.blah: () => void');