[generators] Always call function with closure context when resuming.

test/mjsunit/regress/regress-681171-1.js

+// Copyright 2017 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Flags: --always-opt --function-context-specialization --verify-heap
+
+foo = function foo() { if (found === expected) { if (1 / found) return; } else if ((expected !== expected) && (found !== found)) { return; }; }; bar = function bar() { if (found) {; } };
+try {
+(function __f_2() {
+  bar(...(function*(){ yield 1; yield 2; yield 3; })());
+})();
+(function __f_16() {
+})();
+} catch(e) {; }
+"xxx".match();

[Jarin, 2017/01/17 12:13:14]

Please, use some sensible formatting (here and in the other tests).