PID: 6510 (swaylock)
           UID: 1000 (cedric)
           GID: 1000 (cedric)
        Signal: 7 (BUS)
     Timestamp: Fri 2017-12-08 10:19:35 CET (39s ago)
  Command Line: swaylock
    Executable: /usr/bin/swaylock
 Control Group: /user.slice/user-1000.slice/session-c1.scope
          Unit: session-c1.scope
         Slice: user-1000.slice
       Session: c1
     Owner UID: 1000 (cedric)
       Boot ID: fc0b7204ca5e4a679353d0165ca457be
    Machine ID: 91bd7915bf104020b5455918f7f37cd9
      Hostname: monolith
       Storage: /var/lib/systemd/coredump/core.swaylock.1000.fc0b7204ca5e4a679353d0165ca457be.6510.1512724775000000.lz4
       Message: Process 6510 (swaylock) of user 1000 dumped core.

                Stack trace of thread 6510:
                #0  0x00007f659e32e7d0 n/a (libpixman-1.so.0)
                #1  0x00007f659e31373b n/a (libpixman-1.so.0)
                #2  0x00007f659e2cddf9 pixman_fill (libpixman-1.so.0)
                #3  0x00007f659ffaf1b7 n/a (libcairo.so.2)
                #4  0x00007f659ffeb722 n/a (libcairo.so.2)
                #5  0x00007f659ffebf4e n/a (libcairo.so.2)
                #6  0x00007f659ffebfcc n/a (libcairo.so.2)
                #7  0x00007f659ffa3061 n/a (libcairo.so.2)
                #8  0x00007f659ffefcdc n/a (libcairo.so.2)
                #9  0x00007f659ffab737 n/a (libcairo.so.2)
                #10 0x00007f659ff9d855 cairo_paint (libcairo.so.2)
                #11 0x000055a433ca638d render (swaylock)
                #12 0x000055a433ca6b33 notify_key (swaylock)
                #13 0x00007f659e9961c8 ffi_call_unix64 (libffi.so.6)
                #14 0x00007f659e995c2a ffi_call (libffi.so.6)
                #15 0x00007f65a04abbad n/a (libwayland-client.so.0)
                #16 0x00007f65a04a8679 n/a (libwayland-client.so.0)
                #17 0x00007f65a04a99b4 wl_display_dispatch_queue_pending (libwayland-client.so.0)
                #18 0x000055a433ca55f9 main (swaylock)
                #19 0x00007f659ebb9f6a __libc_start_main (libc.so.6)
                #20 0x000055a433ca5b3a _start (swaylock)