Thread 0:: Dispatch queue: com.apple.main-thread
0 libsystem_kernel.dylib 0x00007fffd0a0ec8a __psynch_cvwait + 10
1 libsystem_pthread.dylib 0x00007fffd0af797a _pthread_cond_wait + 712
2 libc++.1.dylib 0x00007fffcf48558d std::__1::condition_variable::wait(std::__1::unique_lock<std::__1::mutex>&) + 47
3 com.apple.JavaScriptCore 0x00007fffbe6ef7de WTF::ParkingLot::parkConditionallyImpl(void const*, WTF::ScopedLambda<bool ()> const&, WTF::ScopedLambda<void ()> const&, std::__1::chrono::time_point<std::__1::chrono::steady_clock, std::__1::chrono::duration<long long, std::__1::ratio<1l, 1000000000l> > >) + 2494
Thread 0:: Dispatch queue: com.apple.main-thread
0 libsystem_kernel.dylib 0x00007fffd0a0ec8a __psynch_cvwait + 10
1 libsystem_pthread.dylib 0x00007fffd0af797a _pthread_cond_wait + 712
2 libc++.1.dylib 0x00007fffcf48558d std::__1::condition_variable::wait(std::__1::unique_lock<std::__1::mutex>&) + 47
3 com.apple.JavaScriptCore 0x00007fffbe6ef7de WTF::ParkingLot::parkConditionallyImpl(void const*, WTF::ScopedLambda<bool ()> const&, WTF::ScopedLambda<void ()> const&, std::__1::chrono::time_point<std::__1::chrono::steady_clock, std::__1::chrono::duration<long long, std::__1::ratio<1l, 1000000000l> > >) + 2494