PID: 12027 (firefox)
           UID: 1000 (lucas)
           GID: 1000 (lucas)
        Signal: 11 (SEGV)
     Timestamp: Sat 2017-02-04 13:16:00 CET (21h ago)
  Command Line: firefox
    Executable: /usr/lib/firefox/firefox
 Control Group: /user.slice/user-1000.slice/session-c5.scope
          Unit: session-c5.scope
         Slice: user-1000.slice
       Session: c5
     Owner UID: 1000 (lucas)
       Boot ID: 10949b32d21c4960a27cc9af2d31ee9f
    Machine ID: b93ccbbc89d84727afc3a8bf67be54da
      Hostname: lucas-desktop
       Storage: /var/lib/systemd/coredump/core.firefox.1000.10949b32d21c4960a27cc9af2d31ee9f.12027.1486210560000000000000.lz4
       Message: Process 12027 (firefox) of user 1000 dumped core.
                
                Stack trace of thread 12027:
                #0  0x00007fb5845da5f3 n/a (libxul.so)
                #1  0x00007fb58fc38990 __run_exit_handlers (libc.so.6)
                #2  0x00007fb58fc389ea exit (libc.so.6)
                #3  0x00007fb58e6ee575 _XDefaultIOError (libX11.so.6)
                #4  0x00007fb58e6ee7ae _XIOError (libX11.so.6)
                #5  0x00007fb58e6ec7f3 _XReply (libX11.so.6)
                #6  0x00007fb57bd43302 n/a (libGLX_nvidia.so.0)
                #7  0x00007fb57bd43708 n/a (libGLX_nvidia.so.0)
                #8  0x00007fb57bd4376c n/a (libGLX_nvidia.so.0)
                #9  0x00007fb57bd437d7 n/a (libGLX_nvidia.so.0)
                #10 0x00007fb57bd463f6 n/a (libGLX_nvidia.so.0)
                #11 0x00007fb57bd40001 glXChooseVisual (libGLX_nvidia.so.0)
                #12 0x00007fb5845e0e40 n/a (libxul.so)
                #13 0x00007fb5845e109d n/a (libxul.so)
                #14 0x00007fb5845dbd22 n/a (libxul.so)
                #15 0x00007fb5845def65 n/a (libxul.so)
                #16 0x00007fb5845df222 XRE_main (libxul.so)
                #17 0x000055c4ebaf955f n/a (firefox)
                #18 0x000055c4ebaf8b17 n/a (firefox)
                #19 0x00007fb58fc23291 __libc_start_main (libc.so.6)
                #20 0x000055c4ebaf8d1a _start (firefox)