I've been getting some segmentation faults running Upkg, atm I can't do anything because I always get a segfault when it processes one of my custom packages (so I can't even remove it).

Trying to install a package (epiphany-extensions in this case), I get this output (after lots of other "Processing..." lines):
Processing PyXML package...
/usr/bin/upkg-install: line 28: 21104 Segmentation fault upkg --install --disable-source "$@" script
Could not generate script!

And trying to remove or upgrade, this happens:
Processing scid package...
/usr/bin/upkg-upgrade: line 28: 21115 Segmentation fault upkg --disable-source "$@" script
Could not generate script!

(scid is my custom package).

I get crashes with Tomboy as well if I open a note and then open the preferences, so I was wondering if it's maybe a general problem with Mono. But I can't reproduce it when I don't run it as an applet, so I don't know how to get to the output.

I'll need to look deeper into this, but I thought maybe you know what might be going on here. I'm using the testing branch.

I've also already had some segmentation faults of mono when trying to run Upkg but that was with an older version of mono and it normally worked when trying to run the same command again. You can try if it works when you remove the ~/.wapi folder, that has been a mono issue earlier.

I've just noticed that this was a bug in a package specification which should be fixed now.

Yes, it works fine again.