Follow Safari on not throwing when __defineGetter__ fails....

test/mjsunit/regress/regress-1240.js

 // Copyright 2011 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
@@ skipping 14 matching lines @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 // This regression tests that we are not allowed to overwrite an existing
 // non-configurable getter with a new getter. In addition, we should not
 // be able to change the configurable flag from false to true.
 
 var a = {};
 Object.defineProperty(a, 'b',
                       { get: function () { return 42; }, configurable: false });
-try {
-  a.__defineGetter__('b', function _b(){ return 'foo'; });
-  assertUnreachable();
-} catch (e) {
-  assertTrue(/Cannot redefine property/.test(e));
-}
+// Do not allow us to redefine b on a.
+a.__defineGetter__('b', function _b(){ return 'foo'; });
 assertEquals(42, a.b);
 var desc = Object.getOwnPropertyDescriptor(a, 'b');
 assertFalse(desc.configurable);
-// Copyright 2011 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.
-
-// This regression tests that we are not allowed to overwrite an existing
-// non-configurable getter with a new getter. In addition, we should not
-// be able to change the configurable flag from false to true.
-
-var a = {};
-Object.defineProperty(a, 'b',
-                      { get: function () { return 42; }, configurable: false });
-try {
-  a.__defineGetter__('b', function _b(){ return 'foo'; });
-  assertUnreachable();
-} catch (e) {
-  assertTrue(/Cannot redefine property/.test(e));
-}
-assertEquals(42, a.b);
-var desc = Object.getOwnPropertyDescriptor(a, 'b');
-assertFalse(desc.configurable);