(gdb) bt
#0  0x00007f9943d5b56d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f9941ca7150 in poll (__timeout=-1, __nfds=1, __fds=0x7ffcb24ed670) at /usr/include/x86_64-linux-gnu/bits/poll2.h:46
#2  _xcb_conn_wait (c=c@entry=0x118b420, cond=cond@entry=0x7ffcb24ed790, vector=vector@entry=0x0, count=count@entry=0x0) at ../../src/xcb_conn.c:479
#3  0x00007f9941ca8c0f in wait_for_reply (c=c@entry=0x118b420, request=request@entry=88729, e=e@entry=0x7ffcb24ed860) at ../../src/xcb_in.c:516
#4  0x00007f9941ca8d81 in xcb_wait_for_reply64 (c=c@entry=0x118b420, request=88729, e=e@entry=0x7ffcb24ed860) at ../../src/xcb_in.c:560
#5  0x00007f9941f06018 in _XReply (dpy=dpy@entry=0x117c0e0, rep=rep@entry=0x7ffcb24ed8e0, extra=extra@entry=0, discard=discard@entry=0)
    at ../../src/xcb_io.c:596
#6  0x00007f9943a4f8da in DRI2GetBuffersWithFormat (dpy=0x117c0e0, drawable=69206021, width=width@entry=0x130a678, height=height@entry=0x130a67c, 
    attachments=0x7ffcb24edac0, count=1, outCount=0x7ffcb24eda80) at ../../../src/glx/dri2.c:491
#7  0x00007f9943a4fc37 in dri2GetBuffersWithFormat (driDrawable=<optimized out>, width=0x130a678, height=0x130a67c, attachments=<optimized out>, 
    count=<optimized out>, out_count=0x7ffcb24eda80, loaderPrivate=0x130a570) at ../../../src/glx/dri2_glx.c:894
#8  0x00007f993584b4ed in dri2_drawable_get_buffers (count=<synthetic pointer>, atts=0x13916c8, drawable=0x1391070)
    at ../../../../../src/gallium/state_trackers/dri/dri2.c:285
#9  dri2_allocate_textures (ctx=0x11dc4c0, drawable=0x1391070, statts=0x13916c8, statts_count=2)
    at ../../../../../src/gallium/state_trackers/dri/dri2.c:480
#10 0x00007f99358459b4 in dri_st_framebuffer_validate (stctx=<optimized out>, stfbi=<optimized out>, statts=0x13916c8, count=2, out=0x7ffcb24edc30)
    at ../../../../../src/gallium/state_trackers/dri/dri_drawable.c:83
#11 0x00007f9935732494 in st_framebuffer_validate (stfb=stfb@entry=0x1391260, st=st@entry=0x13885d0)
    at ../../../src/mesa/state_tracker/st_manager.c:202
#12 0x00007f993573340c in st_manager_validate_framebuffers (st=st@entry=0x13885d0) at ../../../src/mesa/state_tracker/st_manager.c:870
#13 0x00007f99356df08b in st_validate_state (st=st@entry=0x13885d0, pipeline=pipeline@entry=ST_PIPELINE_RENDER)
    at ../../../src/mesa/state_tracker/st_atom.c:174
#14 0x00007f99356e7d14 in st_Clear (ctx=0x135ae80, mask=2) at ../../../src/mesa/state_tracker/st_cb_clear.c:409