.
Thread 4 (LWP 4283):
#0  0x00007f40479c810d in poll () at ../sysdeps/unix/syscall-template.S:84
No locals.
#1  0x00007f4047cddaa6 in g_main_context_iterate.isra () from /tmp/apport_sandbox_fF_HZI/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#2  0x00007f4047cddbbc in g_main_context_iteration () from /tmp/apport_sandbox_fF_HZI/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#3  0x00007f403ae9346d in dconf_gdbus_worker_thread (user_data=0x5609db80aaa0) at dconf-gdbus-thread.c:82
        context = 0x5609db80aaa0
#4  0x00007f4047d05495 in g_thread_proxy () from /tmp/apport_sandbox_fF_HZI/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#5  0x00007f40474b06ca in start_thread (arg=0x7f403ae8b700) at pthread_create.c:333
        __res = <optimized out>
        pd = 0x7f403ae8b700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {139913842964224, -4812053441577729107, 0, 140728032776639, 139913842964928, 139913842964224, 4879741673452618669, 4879835420672279469}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#6  0x00007f40479d40ff in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105
No locals.
.
Thread 3 (LWP 4279):
#0  0x00007f40479c810d in poll () at ../sysdeps/unix/syscall-template.S:84
No locals.
#1  0x00007f4047cddaa6 in g_main_context_iterate.isra () from /tmp/apport_sandbox_fF_HZI/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#2  0x00007f4047cdde32 in g_main_loop_run () from /tmp/apport_sandbox_fF_HZI/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#3  0x00007f40482c5e86 in gdbus_shared_thread_func () from /tmp/apport_sandbox_fF_HZI/usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
No symbol table info available.
#4  0x00007f4047d05495 in g_thread_proxy () from /tmp/apport_sandbox_fF_HZI/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#5  0x00007f40474b06ca in start_thread (arg=0x7f403c09a700) at pthread_create.c:333
        __res = <optimized out>
        pd = 0x7f403c09a700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {139913861900032, -4812053441577729107, 0, 140728032779359, 139913861900736, 139913861900032, 4879754584661181357, 4879835420672279469}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#6  0x00007f40479d40ff in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105
No locals.
.
Thread 2 (LWP 4278):
#0  0x00007f40479c810d in poll () at ../sysdeps/unix/syscall-template.S:84
No locals.
#1  0x00007f4047cddaa6 in g_main_context_iterate.isra () from /tmp/apport_sandbox_fF_HZI/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#2  0x00007f4047cddbbc in g_main_context_iteration () from /tmp/apport_sandbox_fF_HZI/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#3  0x00007f4047cddc01 in glib_worker_main () from /tmp/apport_sandbox_fF_HZI/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#4  0x00007f4047d05495 in g_thread_proxy () from /tmp/apport_sandbox_fF_HZI/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#5  0x00007f40474b06ca in start_thread (arg=0x7f403c89b700) at pthread_create.c:333
        __res = <optimized out>
        pd = 0x7f403c89b700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {139913870292736, -4812053441577729107, 0, 140728032779007, 139913870293440, 139913870292736, 4879755683635938221, 4879835420672279469}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#6  0x00007f40479d40ff in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105
No locals.
.
Thread 1 (LWP 4173):
#0  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:58
        set = {__val = {0, 343597383809, 4, 0, 472446402655, 139914062221424, 139914062226272, 94600307444240, 140728032776432, 140728032776912, 127, 139914077420468, 5, 0, 2048, 139914055069144}}
        pid = <optimized out>
        tid = <optimized out>
#1  0x00007f40479033ea in __GI_abort () at abort.c:89
        save_stage = 2
        act = {__sigaction_handler = {sa_handler = 0x0, sa_sigaction = 0x0}, sa_mask = {__val = {140728032776432, 94596654694401, 140728032776432, 140728032776304, 94600337333248, 127, 139914062226272, 0, 139914058980096, 139914058980184, 0, 139914058980096, 94600337333376, 1, 140728032776432, 140728032776912}}, sa_flags = -612328448, sa_restorer = 0x5609db809c00}
        sigs = {__val = {32, 0 <repeats 15 times>}}
#2  0x00007f4047d04665 in g_assertion_message () from /tmp/apport_sandbox_fF_HZI/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#3  0x00007f4047d046fa in g_assertion_message_expr () from /tmp/apport_sandbox_fF_HZI/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#4  0x00005609d9b7dea4 in on_shutdown_prepared (system=0x5609db7ec8a0, success=1, manager=0x5609db806100) at gsm-manager.c:3680
No locals.
#5  0x00007f4047fb6f75 in g_closure_invoke () from /tmp/apport_sandbox_fF_HZI/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
No symbol table info available.
#6  0x00007f4047fc8f82 in signal_emit_unlocked_R () from /tmp/apport_sandbox_fF_HZI/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
No symbol table info available.
#7  0x00007f4047fd1bdc in g_signal_emit_valist () from /tmp/apport_sandbox_fF_HZI/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
No symbol table info available.
#8  0x00007f4047fd246b in g_signal_emit_by_name () from /tmp/apport_sandbox_fF_HZI/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
No symbol table info available.
#9  0x00005609d9b74424 in sd_proxy_signal_cb (proxy=<optimized out>, sender_name=<optimized out>, signal_name=0x5609db891c40 "PrepareForShutdown", parameters=0x5609db84f4f0, user_data=0x5609db7ec8a0) at gsm-systemd.c:943
        systemd = 0x5609db7ec8a0
        is_about_to_shutdown = 1
        sender_name = <optimized out>
        proxy = <optimized out>
        signal_name = 0x5609db891c40 "PrepareForShutdown"
        user_data = 0x5609db7ec8a0
        systemd = 0x5609db7ec8a0
        is_about_to_shutdown = 1
#10 0x00007f404470ce18 in ffi_call_unix64 () from /tmp/apport_sandbox_fF_HZI/usr/lib/x86_64-linux-gnu/libffi.so.6
No symbol table info available.
#11 0x00007f404470c87a in ffi_call () from /tmp/apport_sandbox_fF_HZI/usr/lib/x86_64-linux-gnu/libffi.so.6
No symbol table info available.
#12 0x00007f4047fb77ae in g_cclosure_marshal_generic () from /tmp/apport_sandbox_fF_HZI/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
No symbol table info available.
#13 0x00007f4047fb6f75 in g_closure_invoke () from /tmp/apport_sandbox_fF_HZI/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
No symbol table info available.
#14 0x00007f4047fc8f82 in signal_emit_unlocked_R () from /tmp/apport_sandbox_fF_HZI/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
No symbol table info available.
#15 0x00007f4047fd1bdc in g_signal_emit_valist () from /tmp/apport_sandbox_fF_HZI/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
No symbol table info available.
#16 0x00007f4047fd1fbf in g_signal_emit () from /tmp/apport_sandbox_fF_HZI/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
No symbol table info available.
#17 0x00007f40482c23cc in on_signal_received () from /tmp/apport_sandbox_fF_HZI/usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
No symbol table info available.
#18 0x00007f40482b1d64 in emit_signal_instance_in_idle_cb () from /tmp/apport_sandbox_fF_HZI/usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
No symbol table info available.
#19 0x00007f4047cdd75a in g_main_context_dispatch () from /tmp/apport_sandbox_fF_HZI/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#20 0x00007f4047cddb10 in g_main_context_iterate.isra () from /tmp/apport_sandbox_fF_HZI/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#21 0x00007f4047cdde32 in g_main_loop_run () from /tmp/apport_sandbox_fF_HZI/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#22 0x00005609d9b5ec1f in main (argc=<optimized out>, argv=<optimized out>) at main.c:439
        error = 0x0
        override_autostart_dirs = 0x0
        opt_session_name = 0x5609db7e5530 "ubuntu"
        debug_string = <optimized out>
        gl_failed = 0
        options = <optimized out>
        entries = {{long_name = 0x5609d9b8665e "autostart", short_name = 97 'a', flags = 0, arg = G_OPTION_ARG_STRING_ARRAY, arg_data = 0x5609d9d9b468 <override_autostart_dirs>, description = 0x5609d9b86870 "Override standard autostart directories", arg_description = 0x5609d9b86668 "AUTOSTART_DIR"}, {long_name = 0x5609d9b85a21 "session", short_name = 0 '\000', flags = 0, arg = G_OPTION_ARG_STRING, arg_data = 0x5609d9d9b460 <opt_session_name>, description = 0x5609d9b86676 "Session to use", arg_description = 0x5609d9b86685 "SESSION_NAME"}, {long_name = 0x5609d9b86692 "debug", short_name = 0 '\000', flags = 0, arg = G_OPTION_ARG_NONE, arg_data = 0x5609d9d9b498 <debug>, description = 0x5609d9b86698 "Enable debugging code", arg_description = 0x0}, {long_name = 0x5609d9b866ae "failsafe", short_name = 102 'f', flags = 0, arg = G_OPTION_ARG_NONE, arg_data = 0x5609d9d9b4a0 <failsafe>, description = 0x5609d9b86898 "Do not load user-specified applications", arg_description = 0x0}, {long_name = 0x5609d9b866b7 "version", short_name = 0 '\000', flags = 0, arg = G_OPTION_ARG_NONE, arg_data = 0x5609d9d9b49c <show_version>, description = 0x5609d9b866bf "Version of this application", arg_description = 0x0}, {long_name = 0x5609d9b866db "whale", short_name = 0 '\000', flags = 0, arg = G_OPTION_ARG_NONE, arg_data = 0x5609d9d9b494 <please_fail>, description = 0x5609d9b868c0 "Show the fail whale dialog for testing", arg_description = 0x0}, {long_name = 0x5609d9b866e1 "disable-acceleration-check", short_name = 0 '\000', flags = 0, arg = G_OPTION_ARG_NONE, arg_data = 0x5609d9d9b490 <disable_acceleration_check>, description = 0x5609d9b868e8 "Disable hardware acceleration check", arg_description = 0x0}, {long_name = 0x0, short_name = 0 '\000', flags = 0, arg = G_OPTION_ARG_NONE, arg_data = 0x0, description = 0x0, arg_description = 0x0}}