Saw this assertion fail on a bot: ASSERTION FAILED: m_heap->vm()->currentThreadIsHoldingAPILock() /Volumes/Data/slave/mavericks-debug/build/Source/JavaScriptCore/heap/MarkedAllocator.cpp(149) : void *JSC::MarkedAllocator::allocateSlowCase(size_t) http://build.webkit.org/results/Apple%20Mavericks%20Debug%20WK1%20(Tests)/r164689%20(3324)/inspector-protocol/layers/layers-anonymous-crash-log.txt
<rdar://problem/16169502>
This is an exact duplicate of <https://webkit.org/b/129364>. Since 129364 has more information in its description, I'm marking this one as a dup of it. *** This bug has been marked as a duplicate of bug 129364 ***