Looks like python3 is segfaulting. This is what I found in the journal:
lip 03 13:10:06 galeon audit[21019]: ANOM_ABEND auid=1000 uid=1000 gid=1000 ses=3 subj==snap.snapcraft.snapcraft (complain) pid=21019 comm="python3" exe="/var/lib/snapd/snap/snapcraft/3059/usr/bin/python3.5" sig=11 res=1
lip 03 13:10:06 galeon kernel: show_signal_msg: 54 callbacks suppressed
lip 03 13:10:06 galeon kernel: python3[21019]: segfault at 2260 ip 0000000000002260 sp 00007ffe5bb889c8 error 14 in python3.5[3ff000+1000]
lip 03 13:10:06 galeon kernel: Code: Bad RIP value.
lip 03 13:10:06 galeon systemd[1]: Started Process Core Dump (PID 21046/UID 0).
lip 03 13:10:06 galeon audit[1]: SERVICE_START pid=1 uid=0 auid=4294967295 ses=4294967295 subj==unconfined msg='unit=systemd-coredump@2-21046-0 comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
lip 03 13:10:07 galeon systemd-coredump[21047]: Process 21019 (python3) of user 1000 dumped core.
Stack trace of thread 21019:
#0 0x0000000000002260 n/a (n/a)