Fix __awaiter helper for IE8 compat

src/compiler/transformers/es2017.ts

@@ -494,7 +494,7 @@ namespace ts {
                     function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
                     function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
                     function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
-                    step((generator = generator.apply(thisArg, _arguments)).next());
+                    step((generator = generator.apply(thisArg, _arguments || [])).next());
                 });
             };`
     };

tests/baselines/reference/asyncAwaitIsolatedModules_es5.js

@@ -46,7 +46,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
         function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
         function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
         function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
-        step((generator = generator.apply(thisArg, _arguments)).next());
+        step((generator = generator.apply(thisArg, _arguments || [])).next());
     });
 };
 var __generator = (this && this.__generator) || function (thisArg, body) {

tests/baselines/reference/asyncAwaitIsolatedModules_es6.js

@@ -45,7 +45,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
         function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
         function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
         function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
-        step((generator = generator.apply(thisArg, _arguments)).next());
+        step((generator = generator.apply(thisArg, _arguments || [])).next());
     });
 };
 function f0() {

tests/baselines/reference/asyncAwait_es5.js

@@ -45,7 +45,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
         function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
         function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
         function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
-        step((generator = generator.apply(thisArg, _arguments)).next());
+        step((generator = generator.apply(thisArg, _arguments || [])).next());
     });
 };
 var __generator = (this && this.__generator) || function (thisArg, body) {

tests/baselines/reference/asyncAwait_es6.js

@@ -45,7 +45,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
         function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
         function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
         function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
-        step((generator = generator.apply(thisArg, _arguments)).next());
+        step((generator = generator.apply(thisArg, _arguments || [])).next());
     });
 };
 function f0() {

tests/baselines/reference/asyncFunctionNoReturnType.js

@@ -11,7 +11,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
         function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
         function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
         function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
-        step((generator = generator.apply(thisArg, _arguments)).next());
+        step((generator = generator.apply(thisArg, _arguments || [])).next());
     });
 };
 var __generator = (this && this.__generator) || function (thisArg, body) {

tests/baselines/reference/asyncFunctionReturnType.js

@@ -16,7 +16,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
         function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
         function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
         function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
-        step((generator = generator.apply(thisArg, _arguments)).next());
+        step((generator = generator.apply(thisArg, _arguments || [])).next());
     });
 };
 function fAsync() {

tests/baselines/reference/asyncFunctionsAcrossFiles.js

@@ -21,7 +21,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
         function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
         function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
         function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
-        step((generator = generator.apply(thisArg, _arguments)).next());
+        step((generator = generator.apply(thisArg, _arguments || [])).next());
     });
 };
 import { a } from './a';
@@ -36,7 +36,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
         function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
         function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
         function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
-        step((generator = generator.apply(thisArg, _arguments)).next());
+        step((generator = generator.apply(thisArg, _arguments || [])).next());
     });
 };
 import { b } from './b';

tests/baselines/reference/asyncFunctionsAndStrictNullChecks.js

@@ -32,7 +32,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
         function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
         function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
         function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
-        step((generator = generator.apply(thisArg, _arguments)).next());
+        step((generator = generator.apply(thisArg, _arguments || [])).next());
     });
 };
 function sample(promise) {

tests/baselines/reference/asyncIIFE.js

@@ -16,7 +16,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
         function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
         function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
         function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
-        step((generator = generator.apply(thisArg, _arguments)).next());
+        step((generator = generator.apply(thisArg, _arguments || [])).next());
     });
 };
 function f1() {

tests/baselines/reference/asyncImportedPromise_es5.js

@@ -31,7 +31,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
         function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
         function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
         function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
-        step((generator = generator.apply(thisArg, _arguments)).next());
+        step((generator = generator.apply(thisArg, _arguments || [])).next());
     });
 };
 var __generator = (this && this.__generator) || function (thisArg, body) {

tests/baselines/reference/asyncImportedPromise_es6.js

@@ -21,7 +21,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
         function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
         function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
         function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
-        step((generator = generator.apply(thisArg, _arguments)).next());
+        step((generator = generator.apply(thisArg, _arguments || [])).next());
     });
 };
 class Test {

tests/baselines/reference/asyncMultiFile_es5.js

@@ -11,7 +11,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
         function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
         function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
         function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
-        step((generator = generator.apply(thisArg, _arguments)).next());
+        step((generator = generator.apply(thisArg, _arguments || [])).next());
     });
 };
 var __generator = (this && this.__generator) || function (thisArg, body) {

tests/baselines/reference/asyncMultiFile_es6.js

@@ -11,7 +11,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
         function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
         function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
         function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
-        step((generator = generator.apply(thisArg, _arguments)).next());
+        step((generator = generator.apply(thisArg, _arguments || [])).next());
     });
 };
 function f() {

tests/baselines/reference/await_unaryExpression_es6.js

@@ -22,7 +22,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
         function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
         function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
         function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
-        step((generator = generator.apply(thisArg, _arguments)).next());
+        step((generator = generator.apply(thisArg, _arguments || [])).next());
     });
 };
 function bar() {

tests/baselines/reference/await_unaryExpression_es6_1.js

@@ -26,7 +26,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
         function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
         function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
         function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
-        step((generator = generator.apply(thisArg, _arguments)).next());
+        step((generator = generator.apply(thisArg, _arguments || [])).next());
     });
 };
 function bar() {

tests/baselines/reference/await_unaryExpression_es6_2.js

@@ -18,7 +18,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
         function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
         function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
         function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
-        step((generator = generator.apply(thisArg, _arguments)).next());
+        step((generator = generator.apply(thisArg, _arguments || [])).next());
     });
 };
 function bar1() {

tests/baselines/reference/await_unaryExpression_es6_3.js

@@ -24,7 +24,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
         function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
         function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
         function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
-        step((generator = generator.apply(thisArg, _arguments)).next());
+        step((generator = generator.apply(thisArg, _arguments || [])).next());
     });
 };
 function bar1() {

tests/baselines/reference/castOfAwait.js

@@ -14,7 +14,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
         function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
         function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
         function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
-        step((generator = generator.apply(thisArg, _arguments)).next());
+        step((generator = generator.apply(thisArg, _arguments || [])).next());
     });
 };
 function f() {

tests/baselines/reference/declarationEmitPromise.js

@@ -29,7 +29,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
         function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
         function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
         function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
-        step((generator = generator.apply(thisArg, _arguments)).next());
+        step((generator = generator.apply(thisArg, _arguments || [])).next());
     });
 };
 class bluebird {

tests/baselines/reference/decoratorMetadataPromise.js

@@ -27,7 +27,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
         function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
         function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
         function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
-        step((generator = generator.apply(thisArg, _arguments)).next());
+        step((generator = generator.apply(thisArg, _arguments || [])).next());
     });
 };
 class A {

tests/baselines/reference/defaultExportInAwaitExpression01.js

@@ -32,7 +32,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
         function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
         function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
         function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
-        step((generator = generator.apply(thisArg, _arguments)).next());
+        step((generator = generator.apply(thisArg, _arguments || [])).next());
     });
 };
 (function (dependencies, factory) {

tests/baselines/reference/defaultExportInAwaitExpression02.js

@@ -24,7 +24,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
         function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
         function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
         function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
-        step((generator = generator.apply(thisArg, _arguments)).next());
+        step((generator = generator.apply(thisArg, _arguments || [])).next());
     });
 };
 const a_1 = require("./a");

tests/baselines/reference/es5-asyncFunction.js

@@ -14,7 +14,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
         function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
         function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
         function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
-        step((generator = generator.apply(thisArg, _arguments)).next());
+        step((generator = generator.apply(thisArg, _arguments || [])).next());
     });
 };
 var __generator = (this && this.__generator) || function (thisArg, body) {

tests/baselines/reference/es5-importHelpersAsyncFunctions.js

@@ -34,7 +34,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
         function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
         function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
         function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
-        step((generator = generator.apply(thisArg, _arguments)).next());
+        step((generator = generator.apply(thisArg, _arguments || [])).next());
     });
 };
 var __generator = (this && this.__generator) || function (thisArg, body) {

tests/baselines/reference/exportDefaultAsyncFunction.js

@@ -9,7 +9,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
         function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
         function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
         function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
-        step((generator = generator.apply(thisArg, _arguments)).next());
+        step((generator = generator.apply(thisArg, _arguments || [])).next());
     });
 };
 export default function foo() {

tests/baselines/reference/exportDefaultAsyncFunction2.js

@@ -40,7 +40,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
         function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
         function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
         function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
-        step((generator = generator.apply(thisArg, _arguments)).next());
+        step((generator = generator.apply(thisArg, _arguments || [])).next());
     });
 };
 export default () => __awaiter(this, void 0, void 0, function* () { return 0; });

tests/baselines/reference/inferenceLimit.js

@@ -49,7 +49,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
         function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
         function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
         function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
-        step((generator = generator.apply(thisArg, _arguments)).next());
+        step((generator = generator.apply(thisArg, _arguments || [])).next());
     });
 };
 class BrokenClass {

tests/baselines/reference/modularizeLibrary_NoErrorDuplicateLibOptions1.js

@@ -87,7 +87,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
         function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
         function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
         function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
-        step((generator = generator.apply(thisArg, _arguments)).next());
+        step((generator = generator.apply(thisArg, _arguments || [])).next());
     });
 };
 // Using Es6 array

tests/baselines/reference/modularizeLibrary_NoErrorDuplicateLibOptions2.js

@@ -87,7 +87,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
         function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
         function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
         function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
-        step((generator = generator.apply(thisArg, _arguments)).next());
+        step((generator = generator.apply(thisArg, _arguments || [])).next());
     });
 };
 // Using Es6 array

tests/baselines/reference/modularizeLibrary_TargetES5UsingES6Lib.js

@@ -87,7 +87,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
         function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
         function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
         function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
-        step((generator = generator.apply(thisArg, _arguments)).next());
+        step((generator = generator.apply(thisArg, _arguments || [])).next());
     });
 };
 // Using Es6 array

tests/baselines/reference/noImplicitReturnsInAsync1.js

@@ -13,7 +13,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
         function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
         function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
         function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
-        step((generator = generator.apply(thisArg, _arguments)).next());
+        step((generator = generator.apply(thisArg, _arguments || [])).next());
     });
 };
 function test(isError = false) {

tests/baselines/reference/noImplicitReturnsInAsync2.js

@@ -42,7 +42,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
         function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
         function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
         function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
-        step((generator = generator.apply(thisArg, _arguments)).next());
+        step((generator = generator.apply(thisArg, _arguments || [])).next());
     });
 };
 // Should be an error, Promise<number>, currently retorted correctly 

tests/baselines/reference/objectRest2.js

@@ -28,7 +28,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
         function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
         function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
         function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
-        step((generator = generator.apply(thisArg, _arguments)).next());
+        step((generator = generator.apply(thisArg, _arguments || [])).next());
     });
 };
 function rootConnection(name) {

tests/baselines/reference/promiseType.js

@@ -161,7 +161,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
         function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
         function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
         function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
-        step((generator = generator.apply(thisArg, _arguments)).next());
+        step((generator = generator.apply(thisArg, _arguments || [])).next());
     });
 };
 const a = p.then();

tests/baselines/reference/promiseTypeStrictNull.js

@@ -161,7 +161,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
         function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
         function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
         function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
-        step((generator = generator.apply(thisArg, _arguments)).next());
+        step((generator = generator.apply(thisArg, _arguments || [])).next());
     });
 };
 const a = p.then();

tests/baselines/reference/reachabilityChecks7.js

@@ -36,7 +36,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
         function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
         function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
         function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
-        step((generator = generator.apply(thisArg, _arguments)).next());
+        step((generator = generator.apply(thisArg, _arguments || [])).next());
     });
 };
 // async function without return type annotation - error

tests/baselines/reference/transformNestedGeneratorsWithTry.js

@@ -29,7 +29,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
         function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
         function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
         function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
-        step((generator = generator.apply(thisArg, _arguments)).next());
+        step((generator = generator.apply(thisArg, _arguments || [])).next());
     });
 };
 var __generator = (this && this.__generator) || function (thisArg, body) {