[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
0x00007f27221208c0 in __poll_nocancel () at ../sysdeps/unix/syscall-template.S:81
#0  0x00007f27221208c0 in __poll_nocancel () at ../sysdeps/unix/syscall-template.S:81
No locals.
#1  0x00007f2721e0dbd2 in poll (__timeout=-1, __nfds=1, __fds=0x7ffdce74c830) at /usr/include/x86_64-linux-gnu/bits/poll2.h:46
No locals.
#2  _xcb_conn_wait (c=c@entry=0xfe4020, cond=cond@entry=0x7ffdce74c950, vector=vector@entry=0x0, count=count@entry=0x0) at ../../src/xcb_conn.c:459
        ret = <optimized out>
        fd = {fd = 3, events = 1, revents = 0}
#3  0x00007f2721e0f4df in wait_for_reply (c=c@entry=0xfe4020, request=2831905, e=e@entry=0x7ffdce74ca20) at ../../src/xcb_in.c:491
        cond = {__data = {__lock = 0, __futex = 0, __total_seq = 0, __wakeup_seq = 0, __woken_seq = 0, __mutex = 0x0, __nwaiters = 0, __broadcast_seq = 0}, __size = '\000' <repeats 47 times>, __align = 0}
        reader = {request = 2831905, data = 0x7ffdce74c950, next = 0x0}
        ret = 0x0
#4  0x00007f2721e0f5f1 in xcb_wait_for_reply (c=0xfe4020, request=2831905, e=0x7ffdce74ca20) at ../../src/xcb_in.c:521
        ret = <optimized out>
#5  0x00007f2722932a47 in _XReply () from /usr/lib/x86_64-linux-gnu/libX11.so.6
No symbol table info available.
#6  0x00007f27226a126a in DRI2GetBuffersWithFormat (dpy=0xfe2c20, drawable=6291458, width=width@entry=0xff0e88, height=height@entry=0xff0e8c, attachments=0x7ffdce74cbb0, count=1, outCount=0x7ffdce74cb8c) at ../../../../src/glx/dri2.c:491
        info = <optimized out>
        rep = {type = 0 '\000', pad1 = 0 '\000', sequenceNumber = 0, length = 0, width = 4294967295, height = 4294967295, count = 16666848, pad2 = 0, pad3 = 2831904, pad4 = 1}
        req = <optimized out>
        buffers = <optimized out>
        repBuffer = {attachment = 3463760680, name = 32765, pitch = 571119772, cpp = 32551, flags = 16715120}
        p = <optimized out>
        i = <optimized out>
#7  0x00007f27226a15a7 in dri2GetBuffersWithFormat (driDrawable=<optimized out>, width=0xff0e88, height=0xff0e8c, attachments=<optimized out>, count=<optimized out>, out_count=0x7ffdce74cb8c, loaderPrivate=0xff0d70) at ../../../../src/glx/dri2_glx.c:900
        pdraw = 0xff0d70
#8  0x00007f271ecde53b in intel_query_dri2_buffers (buffer_count=0x7ffdce74cb8c, buffers=<synthetic pointer>, drawable=0xff0e60, brw=0x7f27230fe038) at ../../../../../../../src/mesa/drivers/dri/i965/brw_context.c:1348
        screen = 0x1002a80
        fb = <optimized out>
        i = 2
        attachments = {1, 32, 0, 0, 0, 0, 0, 0}
#9  intel_update_dri2_buffers (drawable=0xff0e60, brw=0x7f27230fe038) at ../../../../../../../src/mesa/drivers/dri/i965/brw_context.c:1187
        fb = 0x115ec50
        rb = <optimized out>
        buffers = 0x0
        i = <optimized out>
        count = 0
        region_name = <optimized out>
#10 intel_update_renderbuffers (context=context@entry=0xff1400, drawable=drawable@entry=0xff0e60) at ../../../../../../../src/mesa/drivers/dri/i965/brw_context.c:1243
        brw = 0x7f27230fe038
        screen = <optimized out>
        __func__ = "intel_update_renderbuffers"
#11 0x00007f271ecdea41 in intel_prepare_render (brw=brw@entry=0x7f27230fe038) at ../../../../../../../src/mesa/drivers/dri/i965/brw_context.c:1262
        ctx = 0x7f27230fe038
        driContext = 0xff1400
        drawable = 0xff0e60
#12 0x00007f271ecd2730 in brw_clear (ctx=0x7f27230fe038, mask=18) at ../../../../../../../src/mesa/drivers/dri/i965/brw_clear.c:235
        fb = 0x115ec50
        partial_clear = false
        tri_mask = <optimized out>
#13 0x0000000000402de2 in main ()
No symbol table info available.

Thread 1 (Thread 0x7f2723125740 (LWP 1732)):
#0  0x00007f27221208c0 in __poll_nocancel () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f2721e0dbd2 in poll (__timeout=-1, __nfds=1, __fds=0x7ffdce74c830) at /usr/include/x86_64-linux-gnu/bits/poll2.h:46
#2  _xcb_conn_wait (c=c@entry=0xfe4020, cond=cond@entry=0x7ffdce74c950, vector=vector@entry=0x0, count=count@entry=0x0) at ../../src/xcb_conn.c:459
#3  0x00007f2721e0f4df in wait_for_reply (c=c@entry=0xfe4020, request=2831905, e=e@entry=0x7ffdce74ca20) at ../../src/xcb_in.c:491
#4  0x00007f2721e0f5f1 in xcb_wait_for_reply (c=0xfe4020, request=2831905, e=0x7ffdce74ca20) at ../../src/xcb_in.c:521
#5  0x00007f2722932a47 in _XReply () from /usr/lib/x86_64-linux-gnu/libX11.so.6
#6  0x00007f27226a126a in DRI2GetBuffersWithFormat (dpy=0xfe2c20, drawable=6291458, width=width@entry=0xff0e88, height=height@entry=0xff0e8c, attachments=0x7ffdce74cbb0, count=1, outCount=0x7ffdce74cb8c) at ../../../../src/glx/dri2.c:491
#7  0x00007f27226a15a7 in dri2GetBuffersWithFormat (driDrawable=<optimized out>, width=0xff0e88, height=0xff0e8c, attachments=<optimized out>, count=<optimized out>, out_count=0x7ffdce74cb8c, loaderPrivate=0xff0d70) at ../../../../src/glx/dri2_glx.c:900
#8  0x00007f271ecde53b in intel_query_dri2_buffers (buffer_count=0x7ffdce74cb8c, buffers=<synthetic pointer>, drawable=0xff0e60, brw=0x7f27230fe038) at ../../../../../../../src/mesa/drivers/dri/i965/brw_context.c:1348
#9  intel_update_dri2_buffers (drawable=0xff0e60, brw=0x7f27230fe038) at ../../../../../../../src/mesa/drivers/dri/i965/brw_context.c:1187
#10 intel_update_renderbuffers (context=context@entry=0xff1400, drawable=drawable@entry=0xff0e60) at ../../../../../../../src/mesa/drivers/dri/i965/brw_context.c:1243
#11 0x00007f271ecdea41 in intel_prepare_render (brw=brw@entry=0x7f27230fe038) at ../../../../../../../src/mesa/drivers/dri/i965/brw_context.c:1262
#12 0x00007f271ecd2730 in brw_clear (ctx=0x7f27230fe038, mask=18) at ../../../../../../../src/mesa/drivers/dri/i965/brw_clear.c:235
#13 0x0000000000402de2 in main ()