#0  0x00007fc4415b7cc9 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
        resultvar = 0
        pid = 11749
        selftid = 11749
#1  0x00007fc4415bb0d8 in __GI_abort () at abort.c:89
        save_stage = 2
        act = {__sigaction_handler = {sa_handler = 0x7fff65ef18f8, sa_sigaction = 0x7fff65ef18f8}, sa_mask = {__val = {105440, 140734903555816, 140480916407639, 5, 0, 0, 140480886635816, 
              140480818598586, 140734903555816, 140480917770240, 140480916436245, 0, 140480886833040, 93945705502656, 140734903555616, 0}}, sa_flags = 1128081600, sa_restorer = 0x7fc4433d28c0}
        sigs = {__val = {32, 0 <repeats 15 times>}}
#2  0x00005571703ea8ee in OsAbort () at ../../os/utils.c:1342
No locals.
#3  0x00005571703eff93 in AbortServer () at ../../os/log.c:807
No locals.
#4  0x00005571703f0d88 in FatalError (f=f@entry=0x7fc43d4a52ba "%s:%d assertion '%s' failed\n") at ../../os/log.c:945
        args = {{gp_offset = 32, fp_offset = 48, overflow_arg_area = 0x7fff65ef17d0, reg_save_area = 0x7fff65ef1700}}
        args2 = {{gp_offset = 8, fp_offset = 48, overflow_arg_area = 0x7fff65ef17d0, reg_save_area = 0x7fff65ef1700}}
        beenhere = 1
#5  0x00007fc43d4555ad in sna_dri2_event_free (info=info@entry=0x557171a6aac0) at ../../../src/sna/sna_dri2.c:1663
        __func__ = "sna_dri2_event_free"
#6  0x00007fc43d459688 in sna_dri2_schedule_flip (data=0x557171ea7020, func=0x5571703b8c30 <DRI2SwapEvent>, current_msc=105440, target_msc=0x7fff65ef18f8, immediate=true, back=0x557171e92ec0, 
    front=0x5571721a2770, crtc=0x557171a60030, draw=0x557171ea7020, client=0x557171e71610) at ../../../src/sna/sna_dri2.c:3132
        signal = false
        info = 0x557171a6aac0
#7  sna_dri2_schedule_swap (client=0x557171e71610, draw=0x557171ea7020, front=0x5571721a2770, back=0x557171e92ec0, target_msc=0x7fff65ef18f8, divisor=<optimized out>, remainder=0, 
    func=0x5571703b8c30 <DRI2SwapEvent>, data=0x557171ea7020) at ../../../src/sna/sna_dri2.c:3314
        crtc = 0x557171a60030
        info = 0x0
        type = 1
        current_msc = 105440
        __func__ = "sna_dri2_schedule_swap"
#8  0x00005571703b7d00 in DRI2SwapBuffers (client=client@entry=0x557171e71610, pDraw=0x557171ea7020, target_msc=105440, divisor=0, remainder=<optimized out>, 
    swap_target=swap_target@entry=0x7fff65ef1988, func=func@entry=0x5571703b8c30 <DRI2SwapEvent>, data=0x557171ea7020) at ../../../../hw/xfree86/dri2/dri2.c:1163
        pScreen = 0x557171a5dca0
        pPriv = 0x557171e92de0
        pDestBuffer = 0x5571721a2770
        pSrcBuffer = <optimized out>
        ret = <optimized out>
        i = <optimized out>
        ust = 1757300727
        current_msc = 105440
        __func__ = "DRI2SwapBuffers"
#9  0x00005571703b95d3 in ProcDRI2SwapBuffers (client=0x557171e71610) at ../../../../hw/xfree86/dri2/dri2ext.c:416
        rep = {type = 1 '\001', pad1 = 0 '\000', sequenceNumber = 15695, length = 0, swap_hi = 0, swap_lo = 0, pad2 = 0, pad3 = 0, pad4 = 0, pad5 = 0}
        swap_target = 769
        status = <optimized out>
        stuff = 0x557171ec4340
        pDrawable = 0x557171ea7020
#10 ProcDRI2Dispatch (client=0x557171e71610) at ../../../../hw/xfree86/dri2/dri2ext.c:613
        stuff = 0x557171ec4340
#11 0x000055717029733e in Dispatch () at ../../dix/dispatch.c:432
        clientReady = 0x557171dfd930
        result = <optimized out>
        client = 0x557171e71610
        nready = 0
        icheck = 0x55717067b290 <checkForInput>
        start_tick = 695
#12 0x000055717029b18b in dix_main (argc=13, argv=0x7fff65ef1b88, envp=<optimized out>) at ../../dix/main.c:298
---Type <return> to continue, or q <return> to quit--- 
        i = <optimized out>
        alwaysCheckForInput = {0, 1}
#13 0x00007fc4415a2ec5 in __libc_start_main (main=0x5571702866e0 <main>, argc=13, argv=0x7fff65ef1b88, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff65ef1b78)
    at libc-start.c:287
        result = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, -5895587734574411139, 93945701361381, 140734903556992, 0, 0, 5895319592425411197, 5883434516352127613}, mask_was_saved = 0}}, priv = {pad = {0x0, 
              0x0, 0x5571703f4870 <__libc_csu_init>, 0x7fff65ef1b88}, data = {prev = 0x0, cleanup = 0x0, canceltype = 1883195504}}}
        not_first_call = <optimized out>
#14 0x000055717028670e in _start ()
No symbol table info available.