Core was generated by `/opt/firefox-nightly/firefox -contentproc -childID 4 -isForBrowser -prefsLen 42'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x0000000000406d30 in ?? ()
[Current thread is 1 (Thread 0x7f6b25e47740 (LWP 11989))]
(gdb) bt full
#0  0x0000000000406d30 in  ()
#1  0x00007f6af1cff7f6 in drmFreeDevice (device=0x7ffd78ada198) at xf86drm.c:3292
#2  0x00007f6af21dec09 in drm_get_id_path_tag_for_fd (fd=43) at ../src/loader/loader.c:177
        device = 0x7f6afc7ad200
        tag = 0x0
#3  0x00007f6af21decc9 in loader_get_user_preferred_fd (default_fd=43, different_device=0x7f6af7f9b3ec) at ../src/loader/loader.c:203
        dri_prime = 0x0
        default_tag = 0x7f6b1def4c16 "H\213D$\bH\213t$hdH34%("
        prime = 0x7f6af69a14c0 ""
        devices =
          {0x0, 0x7f6af74ae910, 0xb2, 0x7ffd78ada230, 0x0, 0x7f6b1a02c0e0, 0x0, 0x0, 0x0, 0x0, 0x400000000, 0xcfa4f865b3a5fa00, 0x7ffd78ada2d0, 0x7f6b2588c71f <fcntl+63>, 0x30195f739b4a0, 0x7f6b23ff2000, 0x10, 0x7ffd78ada2e0, 0x7ffd78ada2a0, 0xcfa4f865b3a5fa00, 0x7ffd78adac00, 0x7f6b1a02c0e0, 0x1, 0x0, 0x7f6b1a02c0e0, 0x7f6b09ea2800, 0xd8, 0x7f6af21e1abc <loader_dri3_open+208>, 0x6cb00000000, 0x7f6b23ff2000, 0x24000138, 0x2b000000b2}
        i = 32765
        num_devices = 2024645128
        fd = 32765
        found = false
#4  0x00007f6af21d5ed7 in dri3_create_screen (screen=0, priv=0x7f6af739b4a0) at ../src/glx/dri3_glx.c:856
        c = 0x7f6b23ff2000
        driver_configs = 0x2b3a5fa00
        extensions = 0x7f6af69a14b0
        pdp = 0x7f6af74ae8e0
        psc = 0x7f6af7f9b2e0
        psp = 0xcfa4f865b3a5fa00
        configs = 0x0
        visuals = 0x0
        driverName = 0x7f6af74ae910 '\345' <repeats 199 times>, <incomplete sequence \345>...
        tmp = 0x7ffd78ada5b0 ""
        i = -118247488
        disable = 0 '\000'
#5  0x00007f6af21b4e89 in AllocAndFetchScreenConfigs (dpy=0x7f6b23ff0000, priv=0x7f6af739b4a0) at ../src/glx/glxext.c:820
        psc = 0x0
        i = 0
        screens = 1
#6  0x00007f6af21b52eb in __glXInitialize (dpy=0x7f6b23ff0000) at ../src/glx/glxext.c:946
        dpyPriv = 0x7f6af739b4a0
        d = 0x7ffd78ada470
        glx_direct = 1
        glx_accel = 1
        i = 17
#7  0x00007f6af21ae1d3 in glXQueryVersion (dpy=0x7f6b23ff0000, major=0x7ffd78ada5b0, minor=0x7ffd78ada660) at ../src/glx/glxcmds.c:485
        priv = 0x7f6b0e30a0a0
#8  0x00007f6b14e70207 in  () at /opt/firefox-nightly/libxul.so
#9  0x00007f6b14e71129 in  () at /opt/firefox-nightly/libxul.so
#10 0x00007f6b14e71405 in  () at /opt/firefox-nightly/libxul.so
#11 0x00007f6b15657c6c in  () at /opt/firefox-nightly/libxul.so
#12 0x00007f6b156580d3 in  () at /opt/firefox-nightly/libxul.so
#13 0x00007f6b15658709 in  () at /opt/firefox-nightly/libxul.so
#14 0x00007f6b1562499f in  () at /opt/firefox-nightly/libxul.so
#15 0x00007f6b1562a40f in  () at /opt/firefox-nightly/libxul.so
#16 0x00007f6b157b5296 in  () at /opt/firefox-nightly/libxul.so
#17 0x00007f6b1557222d in  () at /opt/firefox-nightly/libxul.so
#18 0x00007f6b16c3c5d1 in  () at /opt/firefox-nightly/libxul.so
#19 0x00007f6b16e4e6e1 in  () at /opt/firefox-nightly/libxul.so
#20 0x00007f6b16e4781f in  () at /opt/firefox-nightly/libxul.so
#21 0x00007f6b16e406fe in  () at /opt/firefox-nightly/libxul.so
#22 0x00007f6b16e4e63c in  () at /opt/firefox-nightly/libxul.so
#23 0x00007f6b16e53d59 in  () at /opt/firefox-nightly/libxul.so
#24 0x00007f6b170045a8 in  () at /opt/firefox-nightly/libxul.so
#25 0x00007f6b16e4e6e1 in  () at /opt/firefox-nightly/libxul.so
#26 0x00007f6b16eacf65 in  () at /opt/firefox-nightly/libxul.so
#27 0x0000359ccd6dc288 in  ()
#28 0x00007ffd78adbd70 in  ()
#29 0x00007ffd78adbf18 in  ()
#30 0x00007ffd78adbd1e in  ()
#31 0xfff9800000000000 in  ()
#32 0x00007f6b1a0abce0 in  () at /opt/firefox-nightly/libxul.so
#33 0x0000359ccdac2313 in  ()
#34 0x0000000000005022 in  ()
#35 0x00007ffd78adbfd8 in  ()
#36 0x00007f6afefce8b8 in  ()
#37 0x0000000000000002 in  ()
#38 0x00007ffd78adbf58 in  ()
#39 0xfffe7f6b05d27d00 in  ()
#40 0xfffe7f6af2c6d408 in  ()
#41 0xfffa000000000000 in  ()
#42 0xfffe7f6afe3ad800 in  ()
#43 0x00007ffd78adc008 in  ()
#44 0x00007f6afefce8b8 in  ()
#45 0x0000359ccdb7f0ee in  ()
#46 0x0000000000007821 in  ()
#47 0xfffe7f6afe3ad800 in  ()
#48 0xfffa000000000000 in  ()
#49 0xfffe7f6af2c6d408 in  ()
#50 0xfffe7f6b05d27d00 in  ()
#51 0xfffe7f6af2c71428 in  ()
#52 0xfff8800000000001 in  ()
#53 0xfff880000000001d in  ()
#54 0xfffb7f6af2b28040 in  ()
#55 0xfffe7f6af2b29040 in  ()
#56 0x0000000000000000 in  ()