76375de29d
This is necessary because polymorphic stores generally do not perform a map check but only an instance type check, which misses out on changes in the observation status. Unfortunately, there currently is no efficient way in V8 to maintain that optimisation in the presence of Object.observe. R=mstarzinger@chromium.org BUG=v8:2409 Review URL: https://codereview.chromium.org/11477006 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@13205 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
39 lines
1.9 KiB
JavaScript
39 lines
1.9 KiB
JavaScript
// Copyright 2012 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// Flags: --harmony-observation --allow-natives-syntax
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//
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// Test passes if it does not crash.
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arr = [1.1];
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Object.observe(arr, function(){});
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arr.length = 0;
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// TODO(observe): we currently disallow fast elements for observed object.
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// assertTrue(%HasFastDoubleElements(arr));
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// Should not crash
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arr.push(1.1);
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