Crash when closing window

this is the second time i''m seeing something like this when closing chatty:

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           PID: 3616 (phoc)
           UID: 1000 (purism)
           GID: 1000 (purism)
        Signal: 11 (SEGV)
     Timestamp: Wed 2019-07-17 17:34:03 CEST (23s ago)
  Command Line: /usr/bin/phoc -C /usr/share/phosh/rootston.ini -E bash -lc 'gnome-session --disable-acceleration-check --session=phosh'
    Executable: /usr/bin/phoc
 Control Group: /user.slice/user-1000.slice/session-19.scope
          Unit: session-19.scope
         Slice: user-1000.slice
       Session: 19
     Owner UID: 1000 (purism)
       Boot ID: b5ff2545443543f6a6113b896481b075
    Machine ID: d397c93cd3674d558d0fda4718d7e19d
      Hostname: pureos
       Storage: /var/lib/systemd/coredump/core.phoc.1000.b5ff2545443543f6a6113b896481b075.3616.1563377643000000.lz4
       Message: Process 3616 (phoc) of user 1000 dumped core.
                
                Stack trace of thread 3616:
                #0  0x0000aaaad6a99260 n/a (n/a)
                #1  0x0000aaaab9f3cbf4 wlr_signal_emit_safe (phoc)
                #2  0x0000aaaad6b036a0 n/a (n/a)

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Reading symbols from /usr/bin/phoc...Reading symbols from /usr/lib/debug/.build-id/8a/43382fb55c6351332fbe7d9e9491019ca86c52.debug...done.
done.
[New LWP 3616]
[New LWP 3618]
[New LWP 3620]
[New LWP 3619]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/aarch64-linux-gnu/libthread_db.so.1".
Core was generated by `/usr/bin/phoc -C /usr/share/phosh/rootston.ini -E bash -lc 'gnome-session --dis'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x0000aaaad6a99260 in ?? ()
[Current thread is 1 (Thread 0xffffbb629010 (LWP 3616))]
(gdb) bt
#0  0x0000aaaad6a99260 in  ()
#1  0x0000aaaad6b036a0 in  ()
(gdb) tread apply all bt
Undefined command: "tread".  Try "help".
(gdb) thread apply all bt

Thread 4 (Thread 0xffffb68f0e80 (LWP 3619)):
#0  0x0000ffffbbcdf2f0 in poll () at /lib/aarch64-linux-gnu/libc.so.6
#1  0x0000ffffbc376864 in  () at /usr/lib/aarch64-linux-gnu/libglib-2.0.so.0
#2  0x0000ffffbc376984 in g_main_context_iteration () at /usr/lib/aarch64-linux-gnu/libglib-2.0.so.0
#3  0x0000ffffb70fcf1c in  () at /usr/lib/aarch64-linux-gnu/gio/modules/libdconfsettings.so
#4  0x0000ffffbc39f19c in  () at /usr/lib/aarch64-linux-gnu/libglib-2.0.so.0
#5  0x0000ffffbba777e4 in start_thread () at /lib/aarch64-linux-gnu/libpthread.so.0
#6  0x0000ffffbbce8adc in  () at /lib/aarch64-linux-gnu/libc.so.6

Thread 3 (Thread 0xffffb60efe80 (LWP 3620)):
#0  0x0000ffffbbcdf2f0 in poll () at /lib/aarch64-linux-gnu/libc.so.6
#1  0x0000ffffbc376864 in  () at /usr/lib/aarch64-linux-gnu/libglib-2.0.so.0
#2  0x0000ffffbc376c80 in g_main_loop_run () at /usr/lib/aarch64-linux-gnu/libglib-2.0.so.0
#3  0x0000ffffbc5d9aec in  () at /usr/lib/aarch64-linux-gnu/libgio-2.0.so.0
#4  0x0000ffffbc39f19c in  () at /usr/lib/aarch64-linux-gnu/libglib-2.0.so.0
#5  0x0000ffffbba777e4 in start_thread () at /lib/aarch64-linux-gnu/libpthread.so.0
#6  0x0000ffffbbce8adc in  () at /lib/aarch64-linux-gnu/libc.so.6

Thread 2 (Thread 0xffffb70f1e80 (LWP 3618)):
#0  0x0000ffffbbcdf2f0 in poll () at /lib/aarch64-linux-gnu/libc.so.6
#1  0x0000ffffbc376864 in  () at /usr/lib/aarch64-linux-gnu/libglib-2.0.so.0
#2  0x0000ffffbc376984 in g_main_context_iteration () at /usr/lib/aarch64-linux-gnu/libglib-2.0.so.0
#3  0x0000ffffbc3769dc in  () at /usr/lib/aarch64-linux-gnu/libglib-2.0.so.0
#4  0x0000ffffbc39f19c in  () at /usr/lib/aarch64-linux-gnu/libglib-2.0.so.0
#5  0x0000ffffbba777e4 in start_thread () at /lib/aarch64-linux-gnu/libpthread.so.0
#6  0x0000ffffbbce8adc in  () at /lib/aarch64-linux-gnu/libc.so.6

Thread 1 (Thread 0xffffbb629010 (LWP 3616)):
#0  0x0000aaaad6a99260 in  ()
#1  0x0000aaaad6b036a0 in  ()

i'm aware that this is not very useful for debugging so i'm running with asan now since it's hard to reproduce.