I am getting the following crash in my child process just after fork():
Crashed Thread: 0 Dispatch queue: com.apple.root.default-qos
Exception Type: EXC_BAD_INSTRUCTION (SIGILL)
Exception Codes: 0x0000000000000001, 0x0000000000000000
Exception Note: EXC_CORPSE_NOTIFY
Termination Signal: Illegal instruction: 4
Termination Reason: Namespace SIGNAL, Code 0x4
Terminating Process: exc handler [0]
Application Specific Information:
crashed on child side of fork pre-exec
BUG IN CLIENT OF LIBPLATFORM: Unlock of an os_unfair_lock not owned by current thread
Thread 0 Crashed:: Dispatch queue: com.apple.root.default-qos
0 libsystem_platform.dylib 0x00007fffa83a4bf7 _os_unfair_lock_unowned_abort + 23
1 libsystem_platform.dylib 0x00007fffa83a4539 _os_unfair_lock_unlock_slow + 95
2 libBacktraceRecording.dylib 0x000000010017810c fork_child_process_handler + 23
3 libsystem_pthread.dylib 0x000000010020f54e _pthread_fork_child_postinit + 69
4 libSystem.B.dylib 0x00007fffa6b9eb50 libSystem_atfork_child + 64
5 libsystem_c.dylib 0x00007fffa81db477 fork + 47
This app runs fine in El Capitan. The El Capitan build runs fine in Sierra. But I get the crash when I build in Xcode8 and run in Sierra. Any ideas?
