.
Thread 1 (process 5340):
#0  0xb7a050d2 in viaGetLock () from /usr/lib/dri/unichrome_dri.so
#1  0xb7a091a6 in viaWaitIdle () from /usr/lib/dri/unichrome_dri.so
#2  0xb7a056f0 in viaDestroyContext () from /usr/lib/dri/unichrome_dri.so
#3  0xb7a01055 in ?? () from /usr/lib/dri/unichrome_dri.so
#4  0x0808f920 in ?? ()
#5  0x00000090 in ?? ()
#6  0xbfc0e478 in ?? ()
#7  0x0808a988 in ?? ()
#8  0x08074c68 in ?? ()
#9  0x00000090 in ?? ()
#10 0xbfc0e4a8 in ?? ()
#11 0xb7eee255 in ?? () from /usr/lib/libGL.so.1
#12 0x08074c68 in ?? ()
#13 0x00000000 in ?? ()