If you experience a crash/segfault or hang (especially in MC) you can run gdb on python to find the crash or hang. You can attach a debugger to the running mc process like this:
$ ps aux | grep mpf jan 9678 12.4 0.3 1082068 127304 pts/2 SNl+ 23:17 0:06 /usr/bin/python3 /usr/local/bin/mpf mc jan 9760 37.0 0.1 571368 56660 pts/3 Sl+ 23:17 0:01 /usr/bin/python3 /usr/local/bin/mpf game -X
In this example
9678 is the pid of MC and
9760 is the pid of MPF.
You can then attach gdb:
$ sudo gdb python3 9678 [...] (gdb) thread apply all bt [...] (gdb) thread apply all py-bt [...]
Please send us the complete output of gdb. That will help us to figure out the problem.
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