Upload Kmake

deps/v8/test/mjsunit/es6/regress/regress-crbug-837939.js

@@ -0,0 +1,17 @@
+// Copyright 2018 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
+
+// Create a double elements array.
+const iterable = [123.123];
+assertTrue(%HasDoubleElements(iterable))
+
+iterable.length = 0;
+assertTrue(%HasDoubleElements(iterable))
+
+// Should not throw here.
+let map = new Map(iterable);
+assertEquals(0, map.size);
+new WeakMap(iterable); // WeakMap does not have a size