Sometimes when running a command, typically when running many commands in quick succession and possibly at the same time, I see an exit code of 0 and no output for the following command:

git show -s --format=%cI <commitid>

I've tried reproducing this in my shell and in Python with something to the effect of while True: run_command(), but haven't been able to reproduce it, making me think this is most likely a bug in Command, rather than something else to do with my system.

Things I've checked:

• Is Command returning some sort of error? No, not that I can tell, the output seems to be empty data, with a zero status code and no error from Command.
• Is this caused by re-using the same instance of CommandRunner? I doubt it, it looks like the struct is stateless apart from the logger.

Not sure what information would be useful here, I'm going to dig into the code and try to track down what's going on. Would appreciate any discussion about whether this has been seen before, what might be triggering it, etc.