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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 - ASSERT_NOT_REACHED in Heap::endMarking seen on EWS bots"
href="https://bugs.webkit.org/show_bug.cgi?id=166944">166944</a>
</td>
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<tr>
<th>Summary</th>
<td>ASSERT_NOT_REACHED in Heap::endMarking seen on EWS bots
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>Product</th>
<td>WebKit
</td>
</tr>
<tr>
<th>Version</th>
<td>WebKit Nightly Build
</td>
</tr>
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<th>Hardware</th>
<td>All
</td>
</tr>
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<th>OS</th>
<td>All
</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>joepeck@webkit.org
</td>
</tr>
<tr>
<th>CC</th>
<td>fpizlo@apple.com, ggaren@apple.com, mark.lam@apple.com
</td>
</tr></table>
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<div>
<pre>Created <span class=""><a href="attachment.cgi?id=298622" name="attach_298622" title="Crash Log">attachment 298622</a> <a href="attachment.cgi?id=298622&action=edit" title="Crash Log">[details]</a></span>
Crash Log
ASSERT_NOT_REACHED in Heap::endMarking seen on EWS bots
Saw this on EWS output on <a class="bz_bug_link
bz_status_NEW "
title="NEW - Web Inspector: Inspecting a Main Resource that is JS/JSON does not format / syntax highlight it properly"
href="show_bug.cgi?id=166862">bug 166862</a> from yesterday (1/10/2017). That bug does not appear to be related in any way. Attached the full crash from the bot.
Unresolved visit races: 0x126ca2050(JSObject::visitButterfly)
SHOULD NEVER BE REACHED
/Volumes/Data/EWS/WebKit/Source/JavaScriptCore/heap/Heap.cpp(790) : void JSC::Heap::endMarking()
1 0x105627000 WTFCrash
2 0x104e8bcd5 JSC::Heap::endMarking()
3 0x104e8b466 JSC::Heap::markToFixpoint(double)
4 0x104e8e215 JSC::Heap::collectInThread()
5 0x104e9e179 JSC::Heap::Thread::work()
6 0x105634524 WTF::AutomaticThread::start(WTF::Locker<WTF::LockBase> const&)::$_0::operator()() const
7 0x1056342cd void std::__1::__invoke_void_return_wrapper<void>::__call<WTF::AutomaticThread::start(WTF::Locker<WTF::LockBase> const&)::$_0&>(WTF::AutomaticThread::start(WTF::Locker<WTF::LockBase> const&)::$_0&&&)
8 0x1056340bc std::__1::__function::__func<WTF::AutomaticThread::start(WTF::Locker<WTF::LockBase> const&)::$_0, std::__1::allocator<WTF::AutomaticThread::start(WTF::Locker<WTF::LockBase> const&)::$_0>, void ()>::operator()()
9 0x104c2b7ea std::__1::function<void ()>::operator()() const
10 0x1056a1ede WTF::threadEntryPoint(void*)
11 0x1056a3981 WTF::wtfThreadEntryPoint(void*)
12 0x7fff96cc599d _pthread_body
13 0x7fff96cc591a _pthread_body
14 0x7fff96cc3351 thread_start
Appears to be this assert:
void Heap::endMarking()
{
if (!m_visitRaces.isEmpty()) {
dataLog("Unresolved visit races: ", listDump(m_visitRaces), "\n");
RELEASE_ASSERT_NOT_REACHED();
}
...
}</pre>
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