getting a crash in this week's unstable build?

If you're tracking KDE 4.3 development and using packages from the last week or two, you may be experiencing Plasma crashing where the backtrace contains "Solid::Predicate::~Predicate()".

The cause of this is a small bug in some string parsing code in Solid that was tripped up by hotplug action .desktop files installed with some packages of Kaffeine. The kaffeine_play_videocd.desktop file, found in `kde4-config --prefix`/share/apps/solid/actions/, apparently ended up getting shipped with mismatched []s in it. (I'm not sure how that happened exactly as the files look proper in Kaffeine's svn? Oh well ..)

I fixed the crash in Solid the other day but a lot of people seem to be running into it while the fix percolates out. The solution is to get a version of kdelibs (or even just Solid) from this week and/or fix the incorrect .desktop files (e.g. by adding the missing [s).

It's cool that so many people are using and testing the latest and greatest 4.3, though. Figured I'd blog the answer so people can find it more easily.

Enjoy.