Upload Kmake

deps/v8/test/mjsunit/regress/regress-1449550.js

@@ -0,0 +1,26 @@
+// Copyright 2023 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 x() {
+  let obj = { foo: "bar" };
+  obj.toJSON = 42;
+  obj.__proto__ = new Proxy([], {});
+  assertTrue(%HasFastProperties(obj));
+  return obj;
+}
+assertEquals("[object Object]", toString.call(x()));
+
+function y() {
+  let obj = { foo: "bar" };
+  Object.defineProperty(obj, "foo", {
+    get: function () {}
+  });
+  obj.toJSON = 42;
+  obj.__proto__ = new Proxy([], {});
+  assertFalse(%HasFastProperties(obj));
+  return obj;
+}
+assertEquals("[object Object]", toString.call(y()));