Upload Kmake

deps/v8/test/mjsunit/regress/regress-crbug-1012301.js

@@ -0,0 +1,23 @@
+// 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.
+//
+// Flags: --allow-natives-syntax
+
+function f(o) {
+  // The spread after the CloneObject IC shouldn't crash when trying to write a
+  // double value to a field created by CloneObject.
+  return {...o, ...{a:1.4}};
+}
+
+%EnsureFeedbackVectorForFunction(f);
+
+var o = {};
+// Train the CloneObject IC with a Double field.
+o.a = 1.5;
+f(o);
+f(o);
+f(o);
+// Change the source map to have a Tagged field.
+o.a = undefined;
+f(o);