[Webkit-unassigned] [Bug 164801] Concurrent GC causes gmalloc crashes even when disabled

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=164801

--- Comment #1 from Filip Pizlo <fpizlo at apple.com> ---
https://build-safari.apple.com/results/Trunk%20Gala%20Debug%20Stress%20GC%20WK1%20Tests/r208750_89043%20(4374)/results.html

In particular:

Thread 27 Crashed:: WTF::AutomaticThread
0   com.apple.JavaScriptCore          0x000000010ff1ec27 WTFCrash + 39
1   com.apple.JavaScriptCore          0x000000010f706ff9 JSC::Heap::markToFixpoint(double)::$_2::operator()() const + 137
2   com.apple.JavaScriptCore          0x000000010f7070d3 JSC::Heap::markToFixpoint(double)::$_3::operator()(WTF::MonotonicTime) const + 67
3   com.apple.JavaScriptCore          0x000000010f706806 JSC::Heap::markToFixpoint(double) + 3590
4   com.apple.JavaScriptCore          0x000000010f7096e6 JSC::Heap::collectInThread() + 950
5   com.apple.JavaScriptCore          0x000000010f7120d9 JSC::Heap::Thread::work() + 25
6   com.apple.JavaScriptCore          0x000000010ff845b3 WTF::AutomaticThread::start(WTF::Locker<WTF::LockBase> const&)::$_0::operator()() const + 579
7   com.apple.JavaScriptCore          0x000000010ff8435d void std::__1::__invoke_void_return_wrapper<void>::__call<WTF::AutomaticThread::start(WTF::Locker<WTF::LockBase> const&)::$_0&>(WTF::AutomaticThread::start(WTF::Locker<WTF::LockBase> const&)::$_0&&&) + 45
8   com.apple.JavaScriptCore          0x000000010ff8414c std::__1::__function::__func<WTF::AutomaticThread::start(WTF::Locker<WTF::LockBase> const&)::$_0, std::__1::allocator<WTF::AutomaticThread::start(WTF::Locker<WTF::LockBase> const&)::$_0>, void ()>::operator()() + 44
9   com.apple.JavaScriptCore          0x000000010f4ac51a std::__1::function<void ()>::operator()() const + 26
10  com.apple.JavaScriptCore          0x000000010ff96fee WTF::threadEntryPoint(void*) + 158
11  com.apple.JavaScriptCore          0x000000010ff98a91 WTF::wtfThreadEntryPoint(void*) + 289
12  libsystem_pthread.dylib           0x00000001262e399d _pthread_body + 131
13  libsystem_pthread.dylib           0x00000001262e391a _pthread_start + 168
14  libsystem_pthread.dylib           0x00000001262e1351 thread_start + 13

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