[Webkit-unassigned] [Bug 186223] LayoutTests/fast/css/parsing-css-matches-7.html always abandons its Document (disabling JIT fixes it)

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=186223

--- Comment #8 from Simon Fraser (smfr) <simon.fraser at apple.com> ---
Scratch buffers can be created off the main thread:

2   0x11629d5e9 JSC::VM::scratchBufferForSize(unsigned long)
3   0x1156d7c10 JSC::DFG::JITCompiler::makeCatchOSREntryBuffer()
4   0x1156d83f5 JSC::DFG::JITCompiler::compileFunction()
5   0x1158054bd JSC::DFG::Plan::compileInThreadImpl()
6   0x115802b12 JSC::DFG::Plan::compileInThread(JSC::DFG::ThreadData*)
7   0x115a6d17c JSC::DFG::Worklist::ThreadBody::work()
8   0x114e3b3b7 WTF::AutomaticThread::start(WTF::AbstractLocker const&)::$_0::operator()() const
9   0x114e3aff9 WTF::Function<void ()>::CallableWrapper<WTF::AutomaticThread::start(WTF::AbstractLocker const&)::$_0>::call()
10  0x114e4b8fb WTF::Function<void ()>::operator()() const
11  0x114ecedbf WTF::Thread::entryPoint(WTF::Thread::NewThreadContext*)
12  0x114ed4735 WTF::wtfThreadEntryPoint(void*)

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