:set content.plugins true
pkg autoremovein such a case, and deleted some of the dependencies, since, being qutebrowser not listed in /var/db/pkg, those dependencies were instead perceived as orphans by pkgng?
ps -axf | grep python3.6 | grep -
1483 - S 0:04.33 /usr/local/bin/python3.6 /usr/local/bin/qutebrowser
gcore -s -f python3.6 1483, where '1483', is the $PID found above
gdb python3.6 core.1483
btto get a backtrace and navigate into it.