stuck in xcb_wait_for_reply

(gdb) bt
#0  0x00007ffff378312d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007ffff12e3262 in poll (__timeout=-1, __nfds=1, __fds=0x7fffffffd490) at /usr/include/x86_64-linux-gnu/bits/poll2.h:46
#2  _xcb_conn_wait (c=c@entry=0x634f00, cond=cond@entry=0x7fffffffd5b0, vector=vector@entry=0x0, count=count@entry=0x0) at xcb_conn.c:459
#3  0x00007ffff12e4adf in wait_for_reply (c=c@entry=0x634f00, request=8293, e=e@entry=0x7fffffffd678) at xcb_in.c:491
#4  0x00007ffff12e4bf2 in xcb_wait_for_reply (c=c@entry=0x634f00, request=8293, e=e@entry=0x7fffffffd678) at xcb_in.c:521
#5  0x00007ffff4c8748f in _XReply (dpy=0x633b90, rep=0x7fffffffd6f0, extra=0, discard=0) at ../../src/xcb_io.c:602
#6  0x00007ffff7533673 in ?? () from /usr/lib/x86_64-linux-gnu/mesa/libGL.so.1
#7  0x00007ffff753102b in ?? () from /usr/lib/x86_64-linux-gnu/mesa/libGL.so.1
#8  0x00007fffe76c5f3b in dri2_drawable_get_buffers (count=<synthetic pointer>, atts=<optimized out>, drawable=0xa0c400) at ../../../../../../../src/gallium/state_trackers/dri/drm/dri2.c:154
#9  dri2_allocate_textures (ctx=0x7d3ed0, drawable=0xa0c400, statts=0x927e50, statts_count=2) at ../../../../../../../src/gallium/state_trackers/dri/drm/dri2.c:479
#10 0x00007fffe76c47b8 in dri_st_framebuffer_validate (stctx=<optimized out>, stfbi=<optimized out>, statts=0x927e50, count=2, out=0x7fffffffd950)
    at ../../../../../../../src/gallium/state_trackers/dri/drm/dri_drawable.c:83
#11 0x00007fffe75f4cde in st_framebuffer_validate (stfb=stfb@entry=0x927a00, st=st@entry=0xa5e2a0) at ../../../../src/mesa/state_tracker/st_manager.c:197
#12 0x00007fffe75f5c51 in st_manager_validate_framebuffers (st=st@entry=0xa5e2a0) at ../../../../src/mesa/state_tracker/st_manager.c:821
#13 0x00007fffe75c782d in st_validate_state (st=st@entry=0xa5e2a0) at ../../../../src/mesa/state_tracker/st_atom.c:168
#14 0x00007fffe75ce63f in st_Clear (ctx=0x7ffff7f21010, mask=2) at ../../../../src/mesa/state_tracker/st_cb_clear.c:443