(gdb) bt full
#0  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50
        set = {__val = {171515904, 0, 0, 0, 0, 94870821356889, 94870821322000, 67108868, 140427223543248, 0, 0, 978464917824351488, 54, 94870838790880, 140727493513216, 140427243872632}}
        pid = <optimized out>
        tid = <optimized out>
        ret = <optimized out>
#1  0x00007fb7c2a90535 in __GI_abort () at abort.c:79
        save_stage = 1
        act = {__sigaction_handler = {sa_handler = 0x36, sa_sigaction = 0x36}, sa_mask = {__val = {94870838790880, 140727493513216, 140427243872632, 1, 384, 0, 978464917824351488, 206158430256, 94870821333191, 
              171515904, 0, 0, 67108868, 140427223543248, 978464917824351488, 0}}, sa_flags = -711032432, sa_restorer = 0x7ffdac42d0f0}
        sigs = {__val = {32, 0 <repeats 15 times>}}
#2  0x00005648d59ae96a in OsAbort ()
No symbol table info available.
#3  0x00005648d59b4473 in ?? ()
No symbol table info available.
#4  0x00005648d59b52d9 in FatalError ()
No symbol table info available.
#5  0x00005648d59abd81 in ?? ()
No symbol table info available.
#6  <signal handler called>
No locals.
#7  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50
        set = {__val = {0, 94870844899072, 0, 140427222016815, 18446744073637036032, 94870844899072, 94870844899173, 94870844899072, 94870844899072, 94870844899180, 94870844899372, 94870844899072, 94870844899372, 0, 
            0, 0}}
        pid = <optimized out>
        tid = <optimized out>
        ret = <optimized out>
#8  0x00007fb7c2a90535 in __GI_abort () at abort.c:79
        save_stage = 1
        act = {__sigaction_handler = {sa_handler = 0x5648d72c5880, sa_sigaction = 0x5648d72c5880}, sa_mask = {__val = {0, 6, 5, 0, 0, 0, 140727493515688, 21474836480, 140727493515536, 140427223237216, 
              140427223222360, 0, 978464917824351488, 140427223207162, 0, 140427223222360}}, sa_flags = -711201992, sa_restorer = 0x5648d59beb7d}
        sigs = {__val = {32, 0 <repeats 15 times>}}
#9  0x00007fb7c2a9040f in __assert_fail_base (fmt=0x7fb7c2c1c858 "%s%s%s:%u: %s%sAssertion `%s' failed.\n%n", assertion=0x5648d59beb7d "!global_keys[type].created", file=0x5648d59beb38 "../../../../dix/privates.c", 
    line=384, function=<optimized out>) at assert.c:92
        str = 0x5648d72c5880 ""
        total = 4096
#10 0x00007fb7c2aa0142 in __GI___assert_fail (assertion=0x5648d59beb7d "!global_keys[type].created", file=0x5648d59beb38 "../../../../dix/privates.c", line=384, function=0x5648d59bede0 "dixRegisterPrivateKey")
    at assert.c:101
No locals.
#11 0x00005648d586be89 in dixRegisterPrivateKey ()
No symbol table info available.
#12 0x00007fb7b98bf529 in glamor_init () from /usr/lib/xorg/modules/libglamoregl.so
No symbol table info available.
#13 0x00007fb7c14a4a2d in ?? () from /usr/lib/xorg/modules/drivers/modesetting_drv.so
No symbol table info available.
#14 0x00007fb7c149cb97 in ?? () from /usr/lib/xorg/modules/drivers/modesetting_drv.so
No symbol table info available.
#15 0x00005648d584dc90 in AddGPUScreen ()
No symbol table info available.
#16 0x00005648d58a7d8c in ?? ()
No symbol table info available.
--Type <RET> for more, q to quit, c to continue without paging--c
#17 0x00005648d58ad5e1 in ?? ()
No symbol table info available.
#18 0x00005648d58a9ec9 in ?? ()
No symbol table info available.
#19 0x00005648d58aa340 in ?? ()
No symbol table info available.
#20 0x00005648d59ac731 in ?? ()
No symbol table info available.
#21 0x00005648d59a5983 in WaitForSomething ()
No symbol table info available.
#22 0x00005648d584d64c in ?? ()
No symbol table info available.
#23 0x00005648d5851846 in ?? ()
No symbol table info available.
#24 0x00007fb7c2a9209b in __libc_start_main (main=0x5648d583b5c0, argc=11, argv=0x7ffdac42ebf8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffdac42ebe8) at ../csu/libc-start.c:308
        self = <optimized out>
        result = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, 5132712507193217625, 94870819812816, 140727493520368, 0, 0, 1464229968777368153, 1496638397908963929}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x7ffdac42ec58, 0x7fb7c45ca190}, data = {prev = 0x0, cleanup = 0x0, canceltype = -1404900264}}}
        not_first_call = <optimized out>
#25 0x00005648d583b5fa in _start ()
No symbol table info available.
(gdb)