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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - REGRESSION (r209558-209572): Unresolved visit race assertions on stress/materialize-past-butterfly-allocation.js"
href="https://bugs.webkit.org/show_bug.cgi?id=165674">165674</a>
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<th>Summary</th>
<td>REGRESSION (r209558-209572): Unresolved visit race assertions on stress/materialize-past-butterfly-allocation.js
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>Product</th>
<td>WebKit
</td>
</tr>
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<th>Version</th>
<td>Other
</td>
</tr>
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<th>Hardware</th>
<td>Unspecified
</td>
</tr>
<tr>
<th>OS</th>
<td>Unspecified
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Keywords</th>
<td>Regression
</td>
</tr>
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<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>
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<th>Reporter</th>
<td>ap@webkit.org
</td>
</tr>
<tr>
<th>CC</th>
<td>fpizlo@apple.com, ryanhaddad@apple.com
</td>
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<pre>On debug JSC bots.
stress/materialize-past-butterfly-allocation.js.ftl-eager-no-cjit
stress/materialize-past-butterfly-allocation.js.ftl-no-cjit-no-inline-validate
stress/materialize-past-butterfly-allocation.js.ftl-no-cjit-no-put-stack-validate
Unresolved visit races: 0x10c647fe0(JSObject::visitButterfly)
SHOULD NEVER BE REACHED
/Volumes/Data/slave/yosemite-debug/build/Source/JavaScriptCore/heap/Heap.cpp(933) : void JSC::Heap::endMarking()
1 0x105c0f9a0 WTFCrash
2 0x1053c0851 JSC::Heap::endMarking()
3 0x1053bfe4f JSC::Heap::markToFixpoint(double)
4 0x1053c2c45 JSC::Heap::collectInThread()
5 0x1053cda59 JSC::Heap::Thread::work()
6 0x105c74a13 WTF::AutomaticThread::start(WTF::Locker<WTF::LockBase> const&)::$_0::operator()() const
7 0x105c747bd void std::__1::__invoke_void_return_wrapper<void>::__call<WTF::AutomaticThread::start(WTF::Locker<WTF::LockBase> const&)::$_0&>(WTF::AutomaticThread::start(WTF::Locker<WTF::LockBase> const&)::$_0&&&)
8 0x105c745ac std::__1::__function::__func<WTF::AutomaticThread::start(WTF::Locker<WTF::LockBase> const&)::$_0, std::__1::allocator<WTF::AutomaticThread::start(WTF::Locker<WTF::LockBase> const&)::$_0>, void ()>::operator()()
9 0x105159f9a std::__1::function<void ()>::operator()() const
10 0x105c86fbe WTF::threadEntryPoint(void*)
11 0x105c88a61 WTF::wtfThreadEntryPoint(void*)
12 0x7fff8bd9805a _pthread_body
13 0x7fff8bd97fd7 _pthread_body
14 0x7fff8bd953ed thread_start</pre>
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