Random (rare) issues with alsa library

[mojca]

Occasionally, usually when pressing way too many keys on the keyboard, I run into the following error which makes it impossible to recover. Sometimes restarting the python app helps, sometimes I need to reboot the PI. I don't know whether anything can actually be done from within the SamplerBox project though, esp. because I haven't yet found a fully reliable way to reproduce the problem.

Expression 'alsa_snd_pcm_start( stream->playback.pcm )' failed in 'src/hostapi/alsa/pa_linux_alsa.c', line: 2925
Expression 'AlsaStart( stream, 0 )' failed in 'src/hostapi/alsa/pa_linux_alsa.c', line: 3246
Expression 'AlsaRestart( self )' failed in 'src/hostapi/alsa/pa_linux_alsa.c', line: 3313
Expression 'PaAlsaStream_HandleXrun( self )' failed in 'src/hostapi/alsa/pa_linux_alsa.c', line: 4182
Expression 'PaAlsaStream_SetUpBuffers( stream, &framesGot, &xrun )' failed in 'src/hostapi/alsa/pa_linux_alsa.c', line: 4355