Fix microsoft#7966: A non-anonymous type can still fail to have a symbol. For example, an intersection type.

Andy Hanson · Andy Hanson · commit 333413424301 · 2016-05-12T07:28:06.000-07:00
(We still need the check for the Anonymous flags or else anonymous function tooltips will look like `var lambdaFoo: (Anonymous function)(a: number, b: number) =&gt; number'` instead of `var lambdaFoo: (a: number, b: number) =&gt; number`)
diff --git a/src/services/services.ts b/src/services/services.ts
@@ -4349,7 +4349,7 @@ namespace ts {
                                         displayParts.push(keywordPart(SyntaxKind.NewKeyword));
                                         displayParts.push(spacePart());
                                     }
-                                    if (!(type.flags & TypeFlags.Anonymous)) {
+                                    if (!(type.flags & TypeFlags.Anonymous) && type.symbol) {
                                         addRange(displayParts, symbolToDisplayParts(typeChecker, type.symbol, enclosingDeclaration, /*meaning*/ undefined, SymbolFormatFlags.WriteTypeParametersOrArguments));
                                     }
                                     addSignatureDisplayParts(signature, allSignatures, TypeFormatFlags.WriteArrowStyleSignature);
diff --git a/tests/cases/fourslash/getQuickInfoForIntersectionTypes.ts b/tests/cases/fourslash/getQuickInfoForIntersectionTypes.ts
@@ -0,0 +1,8 @@
+////function f(): string & {(): any} {
+////	return <any>{};
+////}
+////let x = f();
+////x/**/();
+
+goTo.marker();
+verify.quickInfoIs("let x: () => any");

Original file line number	Diff line number	Diff line change
`@@ -4349,7 +4349,7 @@ namespace ts {`
`4349`	`4349`	`displayParts.push(keywordPart(SyntaxKind.NewKeyword));`
`4350`	`4350`	`displayParts.push(spacePart());`
`4351`	`4351`	`}`
`4352`		`- if (!(type.flags & TypeFlags.Anonymous)) {`
	`4352`	`+ if (!(type.flags & TypeFlags.Anonymous) && type.symbol) {`
`4353`	`4353`	`addRange(displayParts, symbolToDisplayParts(typeChecker, type.symbol, enclosingDeclaration, /meaning/ undefined, SymbolFormatFlags.WriteTypeParametersOrArguments));`
`4354`	`4354`	`}`
`4355`	`4355`	`addSignatureDisplayParts(signature, allSignatures, TypeFormatFlags.WriteArrowStyleSignature);`