.
Thread 1 (process 20232):
#0  0x00002b319563daa2 in _mesa_x86_64_transform_points4_perspective ()
   from /usr/lib/dri/i915_dri.so
#1  0x00002b31955be124 in ?? () from /usr/lib/dri/i915_dri.so
#2  0x00002b31955ab71b in _tnl_run_pipeline () from /usr/lib/dri/i915_dri.so
#3  0x00002b31955d6d11 in _tnl_flush_vtx () from /usr/lib/dri/i915_dri.so
#4  0x0000000000404593 in ?? ()
#5  0x0000000000404bd6 in ?? ()
#6  0x000000000040735b in ?? ()
#7  0x0000000000404f98 in ?? ()
#8  0x0000000000405a51 in ?? ()
#9  0x00002b31940478e4 in __libc_start_main () from /lib/libc.so.6
#10 0x0000000000403199 in ?? ()
#11 0x00007fff184f9188 in ?? ()
#12 0x0000000000000000 in ?? ()