#0  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50
        set = {__val = {0, 93952217532144, 3432, 140360464636657, 140360466045088, 140360466044576, 140360466048160, 1, 93952226530704, 0, 140360467420112, 140360464627208, 140360466048160, 7408899289151147776, 140360467420112, 140360466044808}}
        pid = <optimized out>
        tid = <optimized out>
        ret = <optimized out>
#1  0x00007fa8379bb899 in __GI_abort () at abort.c:79
        save_stage = 1
        act = {__sigaction_handler = {sa_handler = 0x7ffca6e1df68, sa_sigaction = 0x7ffca6e1df68}, sa_mask = {__val = {140360478811011, 93948114632752, 140720308486144, 0, 129, 93952226530704, 140360479017074, 140360479039519, 140362098147328, 93952226530704, 0, 0, 7408899289151147776, 140360467410836, 140360479530464, 93952226530704}}, sa_flags = 130, sa_restorer = 0x7ffca6e1dfd0}
        sigs = {__val = {32, 0 <repeats 15 times>}}
#2  0x00007fa838753b43 in g_assertion_message.cold () from /tmp/apport_sandbox_wlmufkt0/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#3  0x00007fa8387b0a6f in g_assertion_message_expr () from /tmp/apport_sandbox_wlmufkt0/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#4  0x00007fa837c4fb78 in meta_window_unmanage (window=0x5572f5bb6e80, timestamp=867760) at ../src/core/window.c:1591
        workspace = 0x5572f35501b0
        workspace_manager = <optimized out>
        tmp = 0x7fa81c001c20
        __func__ = "meta_window_unmanage"
#5  0x00007fa837c5cf81 in handle_other_xevent (x11_display=x11_display@entry=0x5572f3921360, event=event@entry=0x7ffca6e1e300) at ../src/x11/events.c:1374
        timestamp = <optimized out>
        display = 0x5572f37ca010
        workspace_manager = 0x5572f37d4200
        modified = <optimized out>
        window = <optimized out>
        property_for_window = <optimized out>
        frame_was_receiver = <optimized out>
        bypass_gtk = 0
#6  0x00007fa837c5db3b in meta_x11_display_handle_xevent (event=0x7ffca6e1e300, x11_display=0x5572f3921360) at ../src/x11/events.c:1857
        input_event = <optimized out>
        display = 0x5572f37ca010
        backend = <optimized out>
        modified = 18874446
        bypass_compositor = 0
        bypass_gtk = 0
        cursor_tracker = <optimized out>
        display = <optimized out>
        backend = <optimized out>
        modified = <optimized out>
        bypass_compositor = <optimized out>
        bypass_gtk = <optimized out>
        input_event = <optimized out>
        cursor_tracker = <optimized out>
        compositor_x11 = <optimized out>
        window = <optimized out>
#7  xevent_filter (xevent=0x7ffca6e1e300, event=<optimized out>, data=0x5572f3921360) at ../src/x11/events.c:1899
        x11_display = 0x5572f3921360
#8  0x00007fa8378a1f6f in gdk_event_apply_filters () from /tmp/apport_sandbox_wlmufkt0/usr/lib/x86_64-linux-gnu/libgdk-3.so.0
No symbol table info available.
#9  0x00007fa8378a229b in _gdk_x11_display_queue_events () from /tmp/apport_sandbox_wlmufkt0/usr/lib/x86_64-linux-gnu/libgdk-3.so.0
No symbol table info available.
#10 0x00007fa83786a094 in gdk_display_get_event () from /tmp/apport_sandbox_wlmufkt0/usr/lib/x86_64-linux-gnu/libgdk-3.so.0
No symbol table info available.
#11 0x00007fa8378a2006 in gdk_event_source_dispatch () from /tmp/apport_sandbox_wlmufkt0/usr/lib/x86_64-linux-gnu/libgdk-3.so.0
No symbol table info available.
#12 0x00007fa838787ecd in g_main_context_dispatch () from /tmp/apport_sandbox_wlmufkt0/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#13 0x00007fa838788150 in g_main_context_iterate.isra () from /tmp/apport_sandbox_wlmufkt0/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#14 0x00007fa838788443 in g_main_loop_run () from /tmp/apport_sandbox_wlmufkt0/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#15 0x00007fa837c3a390 in meta_run () at ../src/core/main.c:676
No locals.
#16 0x00005572f2620d85 in main ()
No symbol table info available.