Swift command line tool runtime crash dyld: Symbol not found: __pthread_atfork_child
When I build any swift command line tool it always crashes (Thread 1: signal SIGABRT) right after launch with:
dyld: Symbol not found: __pthread_atfork_child
Referenced from: /usr/lib/libSystem.B.dylib
Expected in: /usr/lib/libSystem.B.dylib
in /usr/lib/libSystem.B.dylib
Program ended with exit code: 9
This happens to any command line tool I build. Even when I build the xcode command line tool template.
Reseting the mac to an earlier time machine backup fixed the issue for a day. Then it came back for no reason. However I am able to build command line tools using the swift cli and package manager.
I'm using Xcode 8 on macOS 10.12.5
Solution
I'm experiencing the same issue. For me a workaround was to edit the scheme an uncheck the "Queue Debugging: Enable backtrace recording".
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