Fix isNewIdentifierLocation after generator (#46491)

src/services/completions.ts

@@ -2258,6 +2258,9 @@ namespace ts.Completions {
                     case SyntaxKind.AsyncKeyword:
                         return containingNodeKind === SyntaxKind.MethodDeclaration            // const obj = { async c|()
                             || containingNodeKind === SyntaxKind.ShorthandPropertyAssignment; // const obj = { async c|
+
+                    case SyntaxKind.AsteriskToken:
+                        return containingNodeKind === SyntaxKind.MethodDeclaration;           // const obj = { * c|
                 }
 
                 if (isClassMemberCompletionKeyword(tokenKind)) {

tests/cases/fourslash/completionsGeneratorMethodDeclaration.ts

@@ -0,0 +1,28 @@
+/// <reference path="fourslash.ts" />
+
+//// const obj = {
+////   a() {},
+////   * b/*1*/
+//// };
+//// const obj2 = {
+////   * /*2*/
+//// };
+//// const obj3 = {
+////   async * /*3*/
+//// };
+//// class Foo {
+////   * b/*4*/
+//// }
+//// class Foo2 {
+////   * /*5*/
+//// }
+//// class Bar {
+////   static * b/*6*/
+//// }
+
+test.markerNames().forEach(marker => {
+  verify.completions({
+    marker,
+    isNewIdentifierLocation: true
+  });
+});