#0  0x00007fe444f4acc9 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
        resultvar = 0
        pid = 26473
        selftid = 26473
#1  0x00007fe444f4e0d8 in __GI_abort () at abort.c:89
        save_stage = 2
        act = {__sigaction_handler = {sa_handler = 0x7ffdcf1221a8, sa_sigaction = 0x7ffdcf1221a8}, sa_mask = {__val = {228717, 140728077524904, 140618415732055, 5, 0, 0, 140618385960232, 
              140618317923034, 140728077524904, 140618417094656, 140618415760661, 0, 140618386157456, 94488974534592, 140728077524704, 0}}, sa_flags = 1188452544, sa_restorer = 0x7fe446d658c0}
        sigs = {__val = {32, 0 <repeats 15 times>}}
#2  0x000055efed9a38ee in OsAbort () at ../../os/utils.c:1342
No locals.
#3  0x000055efed9a8f93 in AbortServer () at ../../os/log.c:807
No locals.
#4  0x000055efed9a9d88 in FatalError (f=f@entry=0x7fe440e382da "%s:%d assertion '%s' failed\n") at ../../os/log.c:945
        args = {{gp_offset = 32, fp_offset = 48, overflow_arg_area = 0x7ffdcf122090, reg_save_area = 0x7ffdcf121fc0}}
        args2 = {{gp_offset = 8, fp_offset = 48, overflow_arg_area = 0x7ffdcf122090, reg_save_area = 0x7ffdcf121fc0}}
        beenhere = 1
#5  0x00007fe440decb4e in sna_dri2_schedule_flip (data=0x55efefdffc70, func=0x55efed971c30 <DRI2SwapEvent>, current_msc=228717, target_msc=0x7ffdcf1221a8, immediate=true, back=0x55eff0102c80, 
    front=0x55eff00f31a0, crtc=0x55efef9bd080, draw=0x55efefdffc70, client=0x55efefda2df0) at ../../../src/sna/sna_dri2.c:3080
        signal = false
        info = <optimized out>
#6  sna_dri2_schedule_swap (client=0x55efefda2df0, draw=0x55efefdffc70, front=0x55eff00f31a0, back=0x55eff0102c80, target_msc=0x7ffdcf1221a8, divisor=<optimized out>, remainder=0, 
    func=0x55efed971c30 <DRI2SwapEvent>, data=0x55efefdffc70) at ../../../src/sna/sna_dri2.c:3319
        crtc = 0x55efef9bd080
        info = 0x0
        type = 1
        current_msc = 228717
        __func__ = "sna_dri2_schedule_swap"
#7  0x000055efed970d00 in DRI2SwapBuffers (client=client@entry=0x55efefda2df0, pDraw=0x55efefdffc70, target_msc=228717, divisor=0, remainder=<optimized out>, 
    swap_target=swap_target@entry=0x7ffdcf122238, func=func@entry=0x55efed971c30 <DRI2SwapEvent>, data=0x55efefdffc70) at ../../../../hw/xfree86/dri2/dri2.c:1163
        pScreen = 0x55efef9c7350
        pPriv = 0x55efefe039d0
        pDestBuffer = 0x55eff00f31a0
        pSrcBuffer = <optimized out>
        ret = <optimized out>
        i = <optimized out>
        ust = 8219668037
        current_msc = 228717
        __func__ = "DRI2SwapBuffers"
#8  0x000055efed9725d3 in ProcDRI2SwapBuffers (client=0x55efefda2df0) at ../../../../hw/xfree86/dri2/dri2ext.c:416
        rep = {type = 1 '\001', pad1 = 0 '\000', sequenceNumber = 32163, length = 0, swap_hi = 0, swap_lo = 0, pad2 = 0, pad3 = 0, pad4 = 0, pad5 = 0}
        swap_target = 2209
        status = <optimized out>
        stuff = 0x55eff00f0ab0
        pDrawable = 0x55efefdffc70
#9  ProcDRI2Dispatch (client=0x55efefda2df0) at ../../../../hw/xfree86/dri2/dri2ext.c:613
        stuff = 0x55eff00f0ab0
#10 0x000055efed85033e in Dispatch () at ../../dix/dispatch.c:432
        clientReady = 0x55efefd5cd70
        result = <optimized out>
        client = 0x55efefda2df0
        nready = 0
        icheck = 0x55efedc34290 <checkForInput>
        start_tick = 980
#11 0x000055efed85418b in dix_main (argc=13, argv=0x7ffdcf122438, envp=<optimized out>) at ../../dix/main.c:298
        i = <optimized out>
        alwaysCheckForInput = {0, 1}
---Type <return> to continue, or q <return> to quit---
#12 0x00007fe444f35ec5 in __libc_start_main (main=0x55efed83f6e0 <main>, argc=13, argv=0x7ffdcf122438, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffdcf122428)
    at libc-start.c:287
        result = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, 5609177305217577086, 94488970393317, 140728077526064, 0, 0, -5608015978657140610, -5611690826329018242}, mask_was_saved = 0}}, priv = {pad = {0x0, 
              0x0, 0x55efed9ad870 <__libc_csu_init>, 0x7ffdcf122438}, data = {prev = 0x0, cleanup = 0x0, canceltype = -308619152}}}
        not_first_call = <optimized out>
#13 0x000055efed83f70e in _start ()
No symbol table info available.