If BornAgain GUI or a script crashes, re-run under gdb.
If Python is under pyenv control the command
gdb python
will not work. Instead, use
gdb --args /usr/bin/python3 <script>
where the path /usr/bin/python3 must be adapted to point
to a Python executable that is not installed via pyenv.
Also consider python3-dbg (from Debian package of same name).