#0  _Unwind_IteratePhdrCallback (info=<optimized out>, size=64, ptr=0x7ffc13cfe0e0) at ../../../src/libgcc/unwind-dw2-fde-dip.c:275
        data = 0x7ffc13cfe0e0
        phdr = 0x55bbb5d8a040
        p_eh_frame_hdr = 0x0
        p_dynamic = 0x0
        n = <optimized out>
        match = 0
        load_base = 94264698118144
        p = <optimized out>
        hdr = <optimized out>
        eh_frame = 416611827820
        ob = {pc_begin = 0x7f08551d0c40 <main_arena>, tbase = 0x55bbb8a18e40, dbase = 0x0, u = {single = 0xdc8f05ac6ec35e00, array = 0xdc8f05ac6ec35e00, sort = 0xdc8f05ac6ec35e00}, s = {b = {sorted = 0, from_array = 0, mixed_encoding = 0, encoding = 2, count = 162300}, i = 140720640876560}, next = 0x55bbb7b07350}
        pc_low = 0
        pc_high = 0
        prev_cache_entry = 0x0
        last_cache_entry = 0x0
#1  0x00007f0854f4af21 in __GI___dl_iterate_phdr (callback=callback@entry=0x7f08533edb10 <_Unwind_IteratePhdrCallback>, data=data@entry=0x7ffc13cfe0e0) at dl-iteratephdr.c:75
        __clframe = {__cancel_routine = <optimized out>, __cancel_arg = 0x0, __do_it = 1, __cancel_type = <optimized out>}
        nloaded = 81
        ns = <optimized out>
        caller = <optimized out>
        l = 0x7f0857b29170
        info = {dlpi_addr = 94264698118144, dlpi_name = 0x7f0857b29700 "", dlpi_phdr = 0x55bbb5d8a040, dlpi_phnum = 9, dlpi_adds = 85, dlpi_subs = 4, dlpi_tls_modid = 0, dlpi_tls_data = 0x0}
        ret = 0
#2  0x00007f08533eeda5 in _Unwind_Find_FDE (pc=0x7f08533ed38b <_Unwind_Backtrace+59>, bases=bases@entry=0x7ffc13cfe428) at ../../../src/libgcc/unwind-dw2-fde-dip.c:469
        data = {pc = 139673733092235, tbase = 0x0, dbase = 0x0, func = 0x0, ret = 0x0, check_cache = 0}
        ret = <optimized out>
#3  0x00007f08533eb373 in uw_frame_state_for (context=context@entry=0x7ffc13cfe380, fs=fs@entry=0x7ffc13cfe1d0) at ../../../src/libgcc/unwind-dw2.c:1257
        fde = <optimized out>
        cie = <optimized out>
        aug = <optimized out>
        insn = <optimized out>
        end = <optimized out>
#4  0x00007f08533ec550 in uw_init_context_1 () at ../../../src/libgcc/unwind-dw2.c:1586
        ra = <optimized out>
        fs = {regs = {reg = {{loc = {reg = 0, offset = 0, exp = 0x0}, how = REG_UNSAVED} <repeats 18 times>}, prev = 0x0, cfa_offset = 0, cfa_reg = 0, cfa_exp = 0x0, cfa_how = CFA_UNSET}, pc = 0x0, personality = 0x0, data_align = 0, code_align = 0, retaddr_column = 0, fde_encoding = 0 '\000', lsda_encoding = 0 '\000', saw_z = 0 '\000', signal_frame = 0 '\000', eh_ptr = 0x0}
        sp_slot = {ptr = 140720640877456, word = 140720640877456}
        code = <optimized out>
#5  0x00007f08533ed38c in _Unwind_Backtrace (trace=0x7f0854f15ff0 <backtrace_helper>, trace_argument=0x7ffc13cfe630) at ../../../src/libgcc/unwind.inc:295
        context = {reg = {0x0 <repeats 18 times>}, cfa = 0x0, ra = 0x7f08533ed38c <_Unwind_Backtrace+60>, lsda = 0x0, bases = {tbase = 0x0, dbase = 0x0, func = 0x0}, flags = 4611686018427387904, version = 0, args_size = 0, by_value = '\000' <repeats 17 times>}
        code = <optimized out>
#6  0x00007f0854f16168 in __GI___backtrace (array=array@entry=0x7ffc13cfe660, size=size@entry=64) at ../sysdeps/x86_64/backtrace.c:111
        arg = {array = 0x7ffc13cfe660, cfa = 0, cnt = -1, size = 64}
        once = 2
#7  0x000055bbb5f428ad in xorg_backtrace () at ../../../../os/backtrace.c:125
        array = {0x0 <repeats 29 times>, 0x55bbb88bf000, 0x1, 0x55bbb5f4aefe <_XSERVTransSocketWritev+302>, 0x7ffc13cfed60, 0x7f084ec0b523 <wfbBlt+4307>, 0x246, 0x2b000000000033, 0x0, 0x0, 0x0, 0x0, 0x7ffc13cfe880, 0x0, 0x3000000010, 0x7ffc13cfe8a0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x55bbb82258c0, 0x55bbb8277eb0, 0x55bbb61fb820 <FlushCallback>, 0xdc8f05ac6ec35e00, 0x55bbb8b2b830, 0x55bbb8e83910, 0x46505845, 0x0, 0x7f0857af4280, 0x55bbb5f459ed <FlushClient+221>}
        mod = <optimized out>
        size = <optimized out>
        i = <optimized out>
        info = {dli_fname = 0x55bbb8b2b830 "`i\245\270\273U", dli_fbase = 0x7f085007bae7, dli_sname = 0x37f <error: Cannot access memory at address 0x37f>, dli_saddr = 0x0}
#8  0x000055bbb5f46649 in OsSigHandler (signo=7, sip=0x7ffc13cfea30, unused=<optimized out>) at ../../../../os/osinit.c:136
        unused = <optimized out>
        sip = 0x7ffc13cfea30
        signo = 7
#9  <signal handler called>
No locals.
#10 pixman_rasterize_edges (image=image@entry=0x55bbb91b0190, l=l@entry=0x7ffc13cfefa0, r=r@entry=0x7ffc13cfefd0, t=t@entry=2185, b=b@entry=718711) at ../../pixman/pixman-edge.c:376
        __PRETTY_FUNCTION__ = "pixman_rasterize_edges"
#11 0x00007f08566ecc61 in pixman_rasterize_trapezoid (image=image@entry=0x55bbb91b0190, trap=trap@entry=0x55bbb90977c8, x_off=0, y_off=0) at ../../pixman/pixman-trap.c:386
        bpp = 8
        height = <optimized out>
        y_off_fixed = 0
        l = {x = 0, e = -1835008, stepx = 0, signdx = 1, dy = 1835008, dx = 0, stepx_small = 0, stepx_big = 0, dx_small = 0, dx_big = 0}
        r = {x = 1835008, e = -1835008, stepx = 0, signdx = 1, dy = 1835008, dx = 0, stepx_small = 0, stepx_big = 0, dx_small = 0, dx_big = 0}
        t = 2185
        b = 718711
        __PRETTY_FUNCTION__ = "pixman_rasterize_trapezoid"
#12 0x00007f084ec1a597 in wfbRasterizeTrapezoid (pPicture=0x55bbb8974f40, trap=0x55bbb90977c8, x_off=0, y_off=0) at ../../../../fb/fbtrap.c:60
        image = 0x55bbb91b0190
        dst_xoff = 0
        dst_yoff = 0
#13 0x00007f08500ad46c in ?? () from /tmp/apport_sandbox_wkejof0b/usr/lib/x86_64-linux-gnu/nvidia/xorg/nvidia_drv.so
No symbol table info available.
#14 0x00007ffc13cff0b0 in ?? ()
No symbol table info available.
#15 0x000055bbb5dfef5b in RegionCreate (rect=0x55bbb90977f0, rect@entry=0x7ffc13cff0b0, size=8, size@entry=1) at ../../../../dix/region.c:241
        pReg = <optimized out>
#16 0x000055bbb5eb3ce3 in miValidatePicture (pPicture=0x55bbb8b24830, mask=<optimized out>) at ../../../../render/mipict.c:183
        pixbounds = {x1 = 0, y1 = 0, x2 = 0, y2 = 0}
        pDrawable = 0x55bbb8e44320
#17 0x000055bbb83b2b00 in ?? ()
No symbol table info available.
#18 0x000055bbb8b24830 in ?? ()
No symbol table info available.
#19 0x000055bbb5eb7e29 in ValidatePicture (pPicture=0x55bbb87a7510, pPicture@entry=0x55bbb8b24830) at ../../../../render/picture.c:1396
No locals.
#20 0x000055bbb5eb82a5 in CompositeTrapezoids (op=<optimized out>, pSrc=0x1c001c00000000, pDst=0x55bbb8b24830, maskFormat=0x55bbb83b4398, xSrc=<optimized out>, ySrc=<optimized out>, ntrap=8, traps=0x55bbb90977c8) at ../../../../render/picture.c:1598
        ps = <optimized out>
#21 0x000055bbb5ebde7d in ProcRenderTrapezoids (client=0x55bbb8b4abd0) at ../../../../render/render.c:746
        rc = <optimized out>
        ntraps = <optimized out>
        pSrc = 0x55bbb8b24830
        pDst = 0x55bbb87a7510
        pFormat = 0x55bbb83b4398
        stuff = <optimized out>
#22 0x000055bbb5ddce98 in Dispatch () at ../../../../dix/dispatch.c:479
        result = <optimized out>
        client = <optimized out>
        start_tick = 155015
#23 0x000055bbb5de0ee0 in dix_main (argc=12, argv=0x7ffc13cff368, envp=<optimized out>) at ../../../../dix/main.c:287
        i = <optimized out>
        alwaysCheckForInput = {0, 1}
#24 0x00007f0854e06b97 in __libc_start_main (main=0x55bbb5dcab50 <main>, argc=12, argv=0x7ffc13cff368, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffc13cff358) at ../csu/libc-start.c:310
        self = <optimized out>
        __self = <optimized out>
        result = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, 7332427951676065224, 94264698383200, 140720640881504, 0, 0, 3552575028967769544, 3505426093680231880}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x7f0857910733 <_dl_init+259>, 0x7f08578fe438}, data = {prev = 0x0, cleanup = 0x0, canceltype = 1469122355}}}
        not_first_call = <optimized out>
#25 0x000055bbb5dcab8a in _start ()
No symbol table info available.