StacktraceTop: pushbuf_kref () from /tmp/apport_sandbox_eG50i_/usr/lib/x86_64-linux-gnu/libdrm_nouveau.so.2 pushbuf_validate () from /tmp/apport_sandbox_eG50i_/usr/lib/x86_64-linux-gnu/libdrm_nouveau.so.2 PUSH_KICK (push=<optimized out>) at ../../../../../src/gallium/drivers/nouveau/nouveau_winsys.h:59 nv50_flush (pipe=0x7ff89807e5a0, fence=<optimized out>, flags=<optimized out>) at ../../../../../src/gallium/drivers/nouveau/nv50/nv50_context.c:40 st_glFlush (ctx=<optimized out>) at ../../../src/mesa/state_tracker/st_cb_flush.c:121
StacktraceTop: sandbox_ eG50i_/ usr/lib/ x86_64- linux-gnu/ libdrm_ nouveau. so.2 sandbox_ eG50i_/ usr/lib/ x86_64- linux-gnu/ libdrm_ nouveau. so.2 ./../.. /src/gallium/ drivers/ nouveau/ nouveau_ winsys. h:59 7e5a0, fence=<optimized out>, flags=<optimized out>) at ../../. ./../.. /src/gallium/ drivers/ nouveau/ nv50/nv50_ context. c:40 ./src/mesa/ state_tracker/ st_cb_flush. c:121
pushbuf_kref () from /tmp/apport_
pushbuf_validate () from /tmp/apport_
PUSH_KICK (push=<optimized out>) at ../../.
nv50_flush (pipe=0x7ff8980
st_glFlush (ctx=<optimized out>) at ../../.