#0  0x00007f312856fe37 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
        resultvar = 0
        pid = 2442
        selftid = 2442
#1  0x00007f3128571528 in __GI_abort () at abort.c:89
        save_stage = 2
        act = {__sigaction_handler = {sa_handler = 0x7f312a4ed940, sa_sigaction = 0x7f312a4ed940}, sa_mask = {__val = {110154448, 114, 139849160861015, 140733193388037, 0, 72057594037927936, 139849106717992, 82134784, 114, 139849116066848, 139849160889653, 0, 0, 139849110615960, 4294967295, 0}}, sa_flags = 0, sa_restorer = 0x4e54700}
        sigs = {__val = {32, 0 <repeats 15 times>}}
#2  0x00007f3128b8bd95 in g_assertion_message () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#3  0x00007f3128b8be2a in g_assertion_message_expr () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#4  0x00007f312a4a098a in meta_window_unmanage () from /usr/lib/libmutter.so.0
No symbol table info available.
#5  0x00007f312a4bdf4e in ?? () from /usr/lib/libmutter.so.0
No symbol table info available.
#6  0x00007f312a4becb7 in ?? () from /usr/lib/libmutter.so.0
No symbol table info available.
#7  0x00007f31255ec991 in ?? () from /usr/lib/x86_64-linux-gnu/libgdk-3.so.0
No symbol table info available.
#8  0x00007f31255ecc51 in ?? () from /usr/lib/x86_64-linux-gnu/libgdk-3.so.0
No symbol table info available.
#9  0x00007f31255c3749 in gdk_display_get_event () from /usr/lib/x86_64-linux-gnu/libgdk-3.so.0
No symbol table info available.
#10 0x00007f31255eca12 in ?? () from /usr/lib/x86_64-linux-gnu/libgdk-3.so.0
No symbol table info available.
#11 0x00007f3128b65ecd in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#12 0x00007f3128b661b0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#13 0x00007f3128b664d2 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#14 0x00007f312a48e2a8 in meta_run () from /usr/lib/libmutter.so.0
No symbol table info available.
#15 0x000000000040206d in ?? ()
No symbol table info available.
#16 0x00007f312855aec5 in __libc_start_main (main=0x401cd0, argc=1, argv=0x7fff859853e8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff859853d8) at libc-start.c:287
        result = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, -1850988682381819831, 4202828, 140735434740704, 0, 0, 1851257249788133449, 1742232468140261449}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x402630, 0x7fff859853e8}, data = {prev = 0x0, cleanup = 0x0, canceltype = 4204080}}}
        not_first_call = <optimized out>
#17 0x0000000000402175 in ?? ()
No symbol table info available.