Upload Kmake

deps/v8/test/mjsunit/regress/regress-crbug-967254.js

@@ -0,0 +1,17 @@
+// Copyright 2019 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.
+
+// Test that fast COW arrays are properly handled by Array#sort.
+
+function COWSort() {
+  const array = ["cc", "c", "aa", "bb", "b", "ab", "ac"];
+  array.sort();
+  return array;
+}
+
+assertArrayEquals(["aa", "ab", "ac", "b", "bb", "c", "cc"], COWSort());
+
+Array.prototype.sort = () => {};
+
+assertArrayEquals(["cc", "c", "aa", "bb", "b", "ab", "ac"], COWSort());