[westandskif]

On exception it populates linecache so that tracebacks are normal and you can debug it normally with pdb post-mortem debugging - https://docs.python.org/3/library/pdb.html#pdb.post_mortem

Nothing else at the moment, but I've written down this point to contemplate in the nearest future -- thank you!

[carapace]

Ah, that's cool. Cheers!