swaylock segfault

backtrace

bt full
#0  0x00007ff1f521ec00 in xkb_state_layout_index_is_active ()
   from /usr/lib/x86_64-linux-gnu/libxkbcommon.so.0
No symbol table info available.
#1  0x00005605eaa7890d in keyboard_modifiers ()
No symbol table info available.
#2  0x00007ff1f43f181e in ffi_call_unix64 () from /usr/lib/x86_64-linux-gnu/libffi.so.6
No symbol table info available.
#3  0x00007ff1f43f11ef in ffi_call () from /usr/lib/x86_64-linux-gnu/libffi.so.6
No symbol table info available.
#4  0x00007ff1f51f912d in ?? () from /usr/lib/x86_64-linux-gnu/libwayland-client.so.0
No symbol table info available.
#5  0x00007ff1f51f5969 in ?? () from /usr/lib/x86_64-linux-gnu/libwayland-client.so.0
No symbol table info available.
#6  0x00007ff1f51f6e34 in wl_display_dispatch_queue_pending ()
   from /usr/lib/x86_64-linux-gnu/libwayland-client.so.0
No symbol table info available.
#7  0x00007ff1f51f7253 in wl_display_roundtrip_queue ()
   from /usr/lib/x86_64-linux-gnu/libwayland-client.so.0
No symbol table info available.
#8  0x00005605eaa7635f in main ()
No symbol table info available.

stacktrace

coredumpctl gdb                                                    Tue 02 Jul 2019 09:00:19 BST
           PID: 1640 (swaylock)
           UID: 1000 (luis)
           GID: 1000 (luis)
        Signal: 11 (SEGV)
     Timestamp: Mon 2019-07-01 18:25:51 BST (14h ago)
  Command Line: swaylock -d -f -c 000000 -i /home/luis/Pictures/backgrounds/galen-crout-175291.jpg
    Executable: /usr/bin/swaylock
 Control Group: /user.slice/user-1000.slice/session-1.scope
          Unit: session-1.scope
         Slice: user-1000.slice
       Session: 1
     Owner UID: 1000 (luis)
       Boot ID: 62f99135da0f404b940a1b24d5111c79
    Machine ID: 1f9a534b7493d7afe910c6a45cba47e7
      Hostname: luisxps
       Storage: /var/lib/systemd/coredump/core.swaylock.1000.62f99135da0f404b940a1b24d5111c79.1640.1562001951000000.lz4
       Message: Process 1640 (swaylock) of user 1000 dumped core.
                
                Stack trace of thread 1640:
                #0  0x00007ff1f521ec00 xkb_state_layout_index_is_active (libxkbcommon.so.0)
                #1  0x00005605eaa7890d keyboard_modifiers (swaylock)
                #2  0x00007ff1f43f181e ffi_call_unix64 (libffi.so.6)
                #3  0x00007ff1f43f11ef ffi_call (libffi.so.6)
                #4  0x00007ff1f51f912d n/a (libwayland-client.so.0)
                #5  0x00007ff1f51f5969 n/a (libwayland-client.so.0)
                #6  0x00007ff1f51f6e34 wl_display_dispatch_queue_pending (libwayland-client.so.0)
                #7  0x00007ff1f51f7253 wl_display_roundtrip_queue (libwayland-client.so.0)
                #8  0x00005605eaa7635f main (swaylock)
                #9  0x00007ff1f5018b6b __libc_start_main (libc.so.6)
                #10 0x00005605eaa7196a _start (swaylock)

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Reading symbols from /usr/bin/swaylock...
Reading symbols from /usr/lib/debug/.build-id/4d/90713d5d84c1dbb0ab500154d7652e20a86993.debug...
(No debugging symbols found in /usr/lib/debug/.build-id/4d/90713d5d84c1dbb0ab500154d7652e20a86993.debug)
[New LWP 1640]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Core was generated by `swaylock -d -f -c 000000 -i /home/luis/Pictures/backgrounds/galen-crout-175291.'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x00007ff1f521ec00 in xkb_state_layout_index_is_active ()
   from /usr/lib/x86_64-linux-gnu/libxkbcommon.so.0