Don't let JSON parsed objects hit inherited setters.

test/mjsunit/bugs/bug-1015.js

+// Copyright 2010 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// See: http://code.google.com/p/v8/issues/detail?id=1015
+
+// Object and array literals should be created using DefineOwnProperty, and
+// therefore not hit setters in the prototype.
+
+function mkFail(message) {
+  return function () { assertUnreachable(message); }
+}
+
+Object.defineProperty(Object.prototype, "foo",
+                              {get: mkFail("oget"), set: mkFail("oset")});
+Object.defineProperty(Array.prototype, "2",
+                      {get: mkFail("aget"), set: mkFail("aset")});
+
+function inFunction() {
+  for (var i = 0; i < 10; i++) {
+    // in loop.
+    var ja = JSON.parse('[1,2,3,4]');
+    var jo = JSON.parse('{"bar": 10, "foo": 20}')
+    var jop = JSON.parse('{"bar": 10, "__proto__": { }, "foo": 20}')
+    var a = [1,2,3,4];
+    var o = { bar: 10, foo: 20 };
+    var op = { __proto__: { set bar(v) { assertUnreachable("bset"); } },
+               bar: 10 };
+  }
+}
+
+for (var i = 0; i < 10; i++) {
+  // In global scope.
+  var ja = JSON.parse('[1,2,3,4]');
+  var jo = JSON.parse('{"bar": 10, "foo": 20}')
+  var jop = JSON.parse('{"bar": 10, "__proto__": { }, "foo": 20}')
+  var a = [1,2,3,4];
+  var o = { bar: 10, foo: 20 };
+  var op = { __proto__: { set bar(v) { assertUnreachable("bset"); } },
+             bar: 10 };
+  // In function scope.
+  inFunction();
+}