Upload Kmake

deps/v8/test/mjsunit/regress/regress-6121.js

@@ -0,0 +1,24 @@
+// 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: --allow-natives-syntax
+
+function foo(o) {
+  try {
+    for (var x in o) {}
+    return false;
+  } catch (e) {
+    return true;
+  }
+}
+%PrepareFunctionForOptimization(foo);
+
+var o = new Proxy({a:1},{
+  getOwnPropertyDescriptor(target, property) { throw target; }
+});
+
+assertTrue(foo(o));
+assertTrue(foo(o));
+%OptimizeFunctionOnNextCall(foo);
+assertTrue(foo(o));