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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - REGRESSION: ASSERTION FAILED: !m_lastActiveBlock on js/function-apply.html"
href="https://bugs.webkit.org/show_bug.cgi?id=155411">155411</a>
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<th>Summary</th>
<td>REGRESSION: ASSERTION FAILED: !m_lastActiveBlock on js/function-apply.html
</td>
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<th>Classification</th>
<td>Unclassified
</td>
</tr>
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<th>Product</th>
<td>WebKit
</td>
</tr>
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<th>Version</th>
<td>WebKit Nightly Build
</td>
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<th>Hardware</th>
<td>Unspecified
</td>
</tr>
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<th>OS</th>
<td>Unspecified
</td>
</tr>
<tr>
<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>
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<th>Priority</th>
<td>P2
</td>
</tr>
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<th>Component</th>
<td>JavaScriptCore
</td>
</tr>
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<th>Assignee</th>
<td>webkit-unassigned@lists.webkit.org
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<th>Reporter</th>
<td>ap@webkit.org
</td>
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<tr>
<th>CC</th>
<td>fpizlo@apple.com, oliver@apple.com, ryanhaddad@apple.com
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<pre>js/function-apply.html has started to sometimes assert around March 9. It's not frequent enough to pinpoint the exact revision, but it seems to be frequent enough to confuse EWS (see <a class="bz_bug_link
bz_status_NEW "
title="NEW - REGRESSION (r190840): crash inside details element's slotNameFunction"
href="show_bug.cgi?id=155388">bug 155388</a>).
Perhaps <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - Start moving to separated writable and executable mappings in the JIT"
href="show_bug.cgi?id=155178">bug 155178</a>?
ASSERTION FAILED: !m_lastActiveBlock
/Volumes/Data/slave/yosemite-debug/build/Source/JavaScriptCore/heap/MarkedAllocator.h(131) : void JSC::MarkedAllocator::stopAllocating()
1 0x108805030 WTFCrash
2 0x108446e1a JSC::MarkedAllocator::stopAllocating()
3 0x108446dc9 JSC::StopAllocatingFunctor::operator()(JSC::MarkedAllocator&)
4 0x108446d86 void JSC::MarkedSpace::forEachAllocator<JSC::StopAllocatingFunctor>(JSC::StopAllocatingFunctor&)
5 0x108445bd9 void JSC::MarkedSpace::forEachAllocator<JSC::StopAllocatingFunctor>()
6 0x108444c8c JSC::MarkedSpace::stopAllocating()
7 0x10844558c JSC::MarkedSpace::willStartIterating()
8 0x108107a6c JSC::Heap::willStartIterating()
9 0x107bef0d3 JSC::HeapIterationScope::HeapIterationScope(JSC::Heap&)
10 0x107bdf40d JSC::HeapIterationScope::HeapIterationScope(JSC::Heap&)
11 0x108109085 JSC::Heap::removeDeadHeapSnapshotNodes(JSC::HeapProfiler&)
12 0x10810a279 JSC::Heap::collectImpl(JSC::HeapOperation, void*, void*, int (&) [37])
13 0x108109c4d JSC::Heap::collect(JSC::HeapOperation)
14 0x107fe0805 JSC::EdenGCActivityCallback::doCollection()
15 0x1080f8620 JSC::GCActivityCallback::doWork()
16 0x1081248cf JSC::HeapTimer::timerDidFire(__CFRunLoopTimer*, void*)
17 0x7fff8ade12e4 __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__</pre>
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