.
Thread 5 (Thread 0x7f8f28a1c700 (LWP 2017)):
#0  0x00007f8f296f6c2f in __GI___poll (fds=0x55e058402fe0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
        resultvar = 18446744073709551100
        sc_cancel_oldtype = 0
        sc_ret = <optimized out>
#1  0x00007f8f299ada4e in g_main_context_iterate.isra () from /tmp/apport_sandbox_77sgspfq/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#2  0x00007f8f299adb83 in g_main_context_iteration () from /tmp/apport_sandbox_77sgspfq/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#3  0x00007f8f299adbd1 in glib_worker_main () from /tmp/apport_sandbox_77sgspfq/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#4  0x00007f8f299d7121 in g_thread_proxy () from /tmp/apport_sandbox_77sgspfq/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#5  0x00007f8f297db669 in start_thread (arg=<optimized out>) at pthread_create.c:479
        ret = <optimized out>
        pd = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140252838741760, 4097626709666976394, 140731929731406, 140731929731407, 140731929731552, 140252838739520, -4052148351144406390, -4052145430715673974}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
#6  0x00007f8f29703323 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
No locals.
.
Thread 4 (Thread 0x7f8f22ffd700 (LWP 21644)):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
No locals.
#1  0x00007f8f299f9e66 in g_cond_wait_until () from /tmp/apport_sandbox_77sgspfq/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#2  0x00007f8f2997e3e1 in g_async_queue_pop_intern_unlocked () from /tmp/apport_sandbox_77sgspfq/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#3  0x00007f8f299d79ba in g_thread_pool_thread_proxy () from /tmp/apport_sandbox_77sgspfq/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#4  0x00007f8f299d7121 in g_thread_proxy () from /tmp/apport_sandbox_77sgspfq/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#5  0x00007f8f297db669 in start_thread (arg=<optimized out>) at pthread_create.c:479
        ret = <optimized out>
        pd = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140252744242944, 4097626709666976394, 140731929733758, 140731929733759, 140731929733904, 140252744240704, -4052126719004749174, -4052145430715673974}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
#6  0x00007f8f29703323 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
No locals.
.
Thread 3 (Thread 0x7f8f237fe700 (LWP 21640)):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
No locals.
#1  0x00007f8f299f9e66 in g_cond_wait_until () from /tmp/apport_sandbox_77sgspfq/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#2  0x00007f8f2997e3e1 in g_async_queue_pop_intern_unlocked () from /tmp/apport_sandbox_77sgspfq/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#3  0x00007f8f299d79ba in g_thread_pool_thread_proxy () from /tmp/apport_sandbox_77sgspfq/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#4  0x00007f8f299d7121 in g_thread_proxy () from /tmp/apport_sandbox_77sgspfq/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#5  0x00007f8f297db669 in start_thread (arg=<optimized out>) at pthread_create.c:479
        ret = <optimized out>
        pd = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140252752635648, 4097626709666976394, 140731929733758, 140731929733759, 140731929733904, 140252752633408, -4052123419932994934, -4052145430715673974}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
#6  0x00007f8f29703323 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
No locals.
.
Thread 2 (Thread 0x7f8f23fff700 (LWP 2018)):
#0  0x00007f8f296f6c2f in __GI___poll (fds=0x7f8f14001c50, nfds=5, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
        resultvar = 18446744073709551100
        sc_cancel_oldtype = 0
        sc_ret = <optimized out>
#1  0x00007f8f299ada4e in g_main_context_iterate.isra () from /tmp/apport_sandbox_77sgspfq/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#2  0x00007f8f299addd3 in g_main_loop_run () from /tmp/apport_sandbox_77sgspfq/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#3  0x00007f8f29bfc4fa in gdbus_shared_thread_func (user_data=0x55e058414a40) at ../../../gio/gdbusprivate.c:279
        data = 0x55e058414a40
#4  0x00007f8f299d7121 in g_thread_proxy () from /tmp/apport_sandbox_77sgspfq/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#5  0x00007f8f297db669 in start_thread (arg=<optimized out>) at pthread_create.c:479
        ret = <optimized out>
        pd = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140252761028352, 4097626709666976394, 140731929731822, 140731929731823, 140731929731968, 140252761026112, -4052124521055235446, -4052145430715673974}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
#6  0x00007f8f29703323 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
No locals.
.
Thread 1 (Thread 0x7f8f29206e40 (LWP 2008)):
#0  0x00007f8f299b38f5 in _g_log_abort () from /tmp/apport_sandbox_77sgspfq/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#1  0x00007f8f299b4bc9 in g_logv () from /tmp/apport_sandbox_77sgspfq/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#2  0x00007f8f299b4d93 in g_log () from /tmp/apport_sandbox_77sgspfq/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#3  0x000055e056a69d51 in get_fallback_session_name ()
No symbol table info available.
#4  0x000055e056a6ad32 in get_session_filename ()
No symbol table info available.
#5  0x000055e056a6c24f in gdm_session_is_wayland_session ()
No symbol table info available.
#6  0x000055e056a6c349 in update_session_type ()
No symbol table info available.
#7  0x000055e056a6e426 in gdm_session_setup_for_user ()
No symbol table info available.
#8  0x000055e056a6e785 in register_worker ()
No symbol table info available.
#9  0x00007f8f2953881e in ffi_call_unix64 () at ../src/x86/unix64.S:76
No locals.
#10 0x00007f8f295381ef in ffi_call (cif=<optimized out>, fn=<optimized out>, rvalue=<optimized out>, avalue=<optimized out>) at ../src/x86/ffi64.c:525
        classes = {X86_64_INTEGER_CLASS, X86_64_NO_CLASS, 3031313296, 32766}
        stack = <optimized out>
        argp = <optimized out>
        arg_types = <optimized out>
        gprcount = <optimized out>
        ssecount = <optimized out>
        ngpr = 1
        nsse = 0
        i = <optimized out>
        avn = <optimized out>
        ret_in_memory = <optimized out>
        reg_args = <optimized out>
#11 0x00007f8f29a991ed in g_cclosure_marshal_generic () from /tmp/apport_sandbox_77sgspfq/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
No symbol table info available.
#12 0x00007f8f29a986e2 in g_closure_invoke () from /tmp/apport_sandbox_77sgspfq/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
No symbol table info available.
#13 0x00007f8f29aac544 in signal_emit_unlocked_R () from /tmp/apport_sandbox_77sgspfq/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
No symbol table info available.
#14 0x00007f8f29ab43ea in g_signal_emitv () from /tmp/apport_sandbox_77sgspfq/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
No symbol table info available.
#15 0x000055e056a7abfc in _gdm_dbus_worker_manager_skeleton_handle_method_call ()
No symbol table info available.
#16 0x00007f8f29c055ca in g_dbus_interface_method_dispatch_helper (interface=<optimized out>, method_call_func=0x55e056a7aa40 <_gdm_dbus_worker_manager_skeleton_handle_method_call>, invocation=0x7f8f1c044820) at ../../../gio/gdbusinterfaceskeleton.c:613
        has_handlers = <optimized out>
        has_default_class_handler = <optimized out>
        emit_authorized_signal = <optimized out>
        run_in_thread = <optimized out>
        flags = <optimized out>
        object = 0x0
        __FUNCTION__ = "g_dbus_interface_method_dispatch_helper"
#17 0x00007f8f29bec054 in call_in_idle_cb (user_data=<optimized out>) at ../../../gio/gdbusconnection.c:4878
        invocation = 0x7f8f1c044820
        vtable = <optimized out>
        registration_id = <optimized out>
        subtree_registration_id = <optimized out>
        __FUNCTION__ = "call_in_idle_cb"
#18 0x00007f8f299ad72e in g_main_context_dispatch () from /tmp/apport_sandbox_77sgspfq/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#19 0x00007f8f299adae0 in g_main_context_iterate.isra () from /tmp/apport_sandbox_77sgspfq/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#20 0x00007f8f299addd3 in g_main_loop_run () from /tmp/apport_sandbox_77sgspfq/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#21 0x000055e056a693f3 in main ()
No symbol table info available.