Linux: Unreproducible X11 related crash :(

Renoise segfaulted!!! Well, the good news is that i’ve been running it almost continuously for several days, and it’s the first time it crashes… the instance that crashed was running for a few hours, here’s the (relevant part of) log from my xterm window:

Renoise LOG> Application: Successfully loaded ‘DemoSong - Dblue - Syntechtic Sugar.xrns’.
Renoise LOG> System: X ERROR: Returned ‘BadMatch (invalid parameter attributes)’ for operation ‘X_SetInputFocus’
Renoise LOG> CrashLog: /usr/renoise/Renoise_2_8_1_Demo_x86/renoise() [0x86fdd6a]
Renoise LOG> CrashLog: /usr/renoise/Renoise_2_8_1_Demo_x86/renoise() [0x89344e5]
Renoise LOG> CrashLog: /lib/libpthread.so.0(+0x6aea) [0xb750faea]
Renoise LOG> CrashLog: /lib/libc.so.6(clone+0x5e) [0xb732ab9e]
Renoise LOG> CrashLog: [(nil)]
Renoise LOG> CrashLog: [0xd5a7a74]
Renoise LOG> Application: Caught an unhandled exception (Thread: AUDIO SLAVES)!
Renoise LOG> Application: Saving a backup…
Renoise LOG> Application: Terminating…
Renoise LOG> ALSA: Stopping ALSA playback…
Renoise LOG> MIDI: Shut down: Closing all acquired MIDI devices…
Renoise LOG> MIDI-IO: Closing MIDI in device ‘Renoise MIDI In Port A’…
Renoise LOG> MIDI-IO: Closing MIDI in device ‘Renoise MIDI In Port B’…
Renoise LOG> MIDI-IO: Closing MIDI in device ‘Renoise MIDI In Sync’…
Renoise LOG> MIDI-IO: Closing MIDI out device ‘Renoise MIDI Out Sync’…
Failed to destroy a pthread_cond: Resource temporarily unavailable
Failed to destroy a mutex: Resource temporarily unavailable
Renoise LOG> MIDI-IO: Shutting down the MIDI sequencers…
Killed
[pts/3][user@phobos]:~$

I hardly have seen systems that ran perfect without a reboot once a week, other than server-systems with threaded applications.
The devs can ofcourse better decide if the error could be catched.