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<base href="https://bugs.webkit.org/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - REGRESSION: ASSERT (impl->isAtomic()) @ facebook.com"
href="https://bugs.webkit.org/show_bug.cgi?id=149965">149965</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>REGRESSION: ASSERT (impl->isAtomic()) @ facebook.com
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>Product</th>
<td>WebKit
</td>
</tr>
<tr>
<th>Version</th>
<td>Other
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Unspecified
</td>
</tr>
<tr>
<th>OS</th>
<td>Unspecified
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>Normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P2
</td>
</tr>
<tr>
<th>Component</th>
<td>JavaScriptCore
</td>
</tr>
<tr>
<th>Assignee</th>
<td>webkit-unassigned@lists.webkit.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>ggaren@apple.com
</td>
</tr></table>
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<pre>STEPS TO REPRODUCE:
1. Create a debug build
2. Visit Facebook.com
3. Wait about 5 seconds
ASSERTION FAILED: impl->isAtomic()
/Volumes/Big/ggaren/OpenSource/Source/JavaScriptCore/dfg/DFGConstantFoldingPhase.cpp(261) : bool JSC::DFG::ConstantFoldingPhase::foldConstants(JSC::DFG::BasicBlock *)
1 0x114645330 WTFCrash
2 0x113d2b395 JSC::DFG::ConstantFoldingPhase::foldConstants(JSC::DFG::BasicBlock*)
3 0x113d2a39a JSC::DFG::ConstantFoldingPhase::run()
4 0x113d2a215 bool JSC::DFG::runAndLog<JSC::DFG::ConstantFoldingPhase>(JSC::DFG::ConstantFoldingPhase&)
5 0x113d2a19e bool JSC::DFG::runPhase<JSC::DFG::ConstantFoldingPhase>(JSC::DFG::Graph&)
6 0x113d2a158 JSC::DFG::performConstantFolding(JSC::DFG::Graph&)
7 0x113ea1bd1 JSC::DFG::Plan::compileInThreadImpl(JSC::DFG::LongLivedState&)
8 0x113ea0cda JSC::DFG::Plan::compileInThread(JSC::DFG::LongLivedState&, JSC::DFG::ThreadData*)
9 0x113fa60d0 JSC::DFG::Worklist::runThread(JSC::DFG::ThreadData*)
10 0x113fa45c4 JSC::DFG::Worklist::threadFunction(void*)
11 0x1146b0419 WTF::createThread(void (*)(void*), void*, char const*)::$_0::operator()() const
12 0x1146b03ec std::__1::__function::__func<WTF::createThread(void (*)(void*), void*, char const*)::$_0, std::__1::allocator<WTF::createThread(void (*)(void*), void*, char const*)::$_0>, void ()>::operator()()
13 0x1140d91da std::__1::function<void ()>::operator()() const
14 0x1146af36e WTF::threadEntryPoint(void*)
15 0x1146b0cf8 WTF::wtfThreadEntryPoint(void*)
16 0x7fff8e3ba268 _pthread_body
17 0x7fff8e3ba1e5 _pthread_body
18 0x7fff8e3b841d thread_start</pre>
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