Upload Kmake

deps/v8/test/mjsunit/regress/regress-crbug-1257519.js

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+// Copyright 2021 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: --no-lazy-feedback-allocation
+
+var a = "hello";
+function foo(i) {
+  var x = a[i];
+  return x;
+}
+
+// Set up the KeyedLoadIC for monomorphic string load.
+foo(4);
+foo(4);
+foo(4);
+// That also handles out of bounds indexes.
+assertEquals(foo(8), undefined);
+
+// Add a negative indexed property (not an element, so the
+// NoElement protector will not fire).
+Object.prototype[-1] = 2;
+assertEquals(2, foo(-1));