.
Thread 3 (LWP 20350):
#0  0x00007fdfe148b3cd in poll () at ../sysdeps/unix/syscall-template.S:81
No locals.
#1  0x00007fdfe19cb394 in g_main_context_poll (priority=2147483647, n_fds=3, fds=0x7fdfd80010c0, timeout=-1, context=0x1738100) at /build/buildd/glib2.0-2.37.3/./glib/gmain.c:3999
        poll_func = 0x7fdfe19da030 <g_poll>
#2  g_main_context_iterate (context=0x1738100, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.37.3/./glib/gmain.c:3700
        max_priority = 2147483647
        timeout = -1
        some_ready = <optimized out>
        nfds = 3
        allocated_nfds = 3
        fds = 0x7fdfd80010c0
#3  0x00007fdfe19cb7fa in g_main_loop_run (loop=0x1738090) at /build/buildd/glib2.0-2.37.3/./glib/gmain.c:3899
        __PRETTY_FUNCTION__ = "g_main_loop_run"
#4  0x00007fdfe27e6646 in gdbus_shared_thread_func (user_data=0x17380d0) at /build/buildd/glib2.0-2.37.3/./gio/gdbusprivate.c:278
        data = 0x17380d0
#5  0x00007fdfe19efc25 in g_thread_proxy (data=0x173a450) at /build/buildd/glib2.0-2.37.3/./glib/gthread.c:798
        thread = 0x173a450
#6  0x00007fdfe176df8e in start_thread (arg=0x7fdfdeeb2700) at pthread_create.c:311
        __res = <optimized out>
        pd = 0x7fdfdeeb2700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140599494387456, -7047357812610473753, 0, 140599563911264, 140735690072576, 4096, 7029411750317875431, 7029278466665701607}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#7  0x00007fdfe1497e1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113
No locals.
.
Thread 2 (LWP 21032):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
No locals.
#1  0x00007fdfe1a0b115 in g_cond_wait_until (cond=cond@entry=0x7fdfd8004f68, mutex=mutex@entry=0x7fdfd8004f60, end_time=end_time@entry=44245301304) at /build/buildd/glib2.0-2.37.3/./glib/gthread-posix.c:868
        ts = {tv_sec = 44245, tv_nsec = 301304000}
        status = <optimized out>
#2  0x00007fdfe19a1ad1 in g_async_queue_pop_intern_unlocked (queue=0x7fdfd8004f60, wait=wait@entry=1, end_time=44245301304) at /build/buildd/glib2.0-2.37.3/./glib/gasyncqueue.c:424
        retval = <optimized out>
        __PRETTY_FUNCTION__ = "g_async_queue_pop_intern_unlocked"
#3  0x00007fdfe19a2098 in g_async_queue_timeout_pop_unlocked (queue=<optimized out>, timeout=timeout@entry=500000) at /build/buildd/glib2.0-2.37.3/./glib/gasyncqueue.c:572
        end_time = <optimized out>
#4  0x00007fdfe19f05b8 in g_thread_pool_wait_for_new_task (pool=0x7fdfd80063c0) at /build/buildd/glib2.0-2.37.3/./glib/gthreadpool.c:264
        task = <optimized out>
#5  g_thread_pool_thread_proxy (data=<optimized out>) at /build/buildd/glib2.0-2.37.3/./glib/gthreadpool.c:298
        task = 0x7fdfd8006de0
        pool = 0x7fdfd80063c0
#6  0x00007fdfe19efc25 in g_thread_proxy (data=0x173a990) at /build/buildd/glib2.0-2.37.3/./glib/gthread.c:798
        thread = 0x173a990
#7  0x00007fdfe176df8e in start_thread (arg=0x7fdfde6b1700) at pthread_create.c:311
        __res = <optimized out>
        pd = 0x7fdfde6b1700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140599485994752, -7047357812610473753, 0, 24424560, 140735690070528, 16, 7029412850366374119, 7029278466665701607}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#8  0x00007fdfe1497e1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113
No locals.
.
Thread 1 (LWP 20349):
#0  g_type_check_instance_cast (type_instance=0x1745110, iface_type=24348240) at /build/buildd/glib2.0-2.37.3/./gobject/gtype.c:4008
        is_instantiatable = <optimized out>
        check = <optimized out>
#1  0x000000000040473d in ?? ()
No symbol table info available.
#2  0x00007fdfe1c93268 in g_closure_invoke (closure=0x7fdfd0002a30, return_value=0x0, n_param_values=3, param_values=0x7fff94d05f50, invocation_hint=0x7fff94d05ef0) at /build/buildd/glib2.0-2.37.3/./gobject/gclosure.c:777
        marshal = 0x7fdfe1edb5a0 <g_udev_marshal_VOID__STRING_OBJECT>
        marshal_data = 0x0
        in_marshal = 0
        real_closure = 0x7fdfd0002a10
        __PRETTY_FUNCTION__ = "g_closure_invoke"
#3  0x00007fdfe1ca56cd in signal_emit_unlocked_R (node=node@entry=0x7fdfd00020d0, detail=detail@entry=0, instance=instance@entry=0x7fdfd8005560, emission_return=emission_return@entry=0x0, instance_and_params=instance_and_params@entry=0x7fff94d05f50) at /build/buildd/glib2.0-2.37.3/./gobject/gsignal.c:3582
        tmp = <optimized out>
        handler = 0x1728530
        accumulator = 0x0
        emission = {next = 0x0, instance = 0x7fdfd8005560, ihint = {signal_id = 47, detail = 0, run_type = G_SIGNAL_RUN_FIRST}, state = EMISSION_RUN, chain_type = 4}
        handler_list = 0x1728530
        return_accu = 0x0
        accu = {g_type = 0, data = {{v_int = 0, v_uint = 0, v_long = 0, v_ulong = 0, v_int64 = 0, v_uint64 = 0, v_float = 0, v_double = 0, v_pointer = 0x0}, {v_int = 0, v_uint = 0, v_long = 0, v_ulong = 0, v_int64 = 0, v_uint64 = 0, v_float = 0, v_double = 0, v_pointer = 0x0}}}
        signal_id = 47
        max_sequential_handler_number = 38
        return_value_altered = 0
#4  0x00007fdfe1cad8ba in g_signal_emit_valist (instance=<optimized out>, signal_id=<optimized out>, detail=<optimized out>, var_args=var_args@entry=0x7fff94d06108) at /build/buildd/glib2.0-2.37.3/./gobject/gsignal.c:3326
        instance_and_params = 0x7fff94d05f50
        signal_return_type = <optimized out>
        param_values = 0x7fff94d05f68
        i = <optimized out>
        n_params = <optimized out>
        __PRETTY_FUNCTION__ = "g_signal_emit_valist"
#5  0x00007fdfe1cadb92 in g_signal_emit (instance=<optimized out>, signal_id=<optimized out>, detail=<optimized out>) at /build/buildd/glib2.0-2.37.3/./gobject/gsignal.c:3382
        var_args = {{gp_offset = 40, fp_offset = 48, overflow_arg_area = 0x7fff94d061e0, reg_save_area = 0x7fff94d06120}}
#6  0x00007fdfe1ed89e4 in ?? () from /tmp/apport_sandbox_ji7MC8/lib/x86_64-linux-gnu/libgudev-1.0.so.0
No symbol table info available.
#7  0x00007fdfe19cb0a6 in g_main_dispatch (context=0x172e450) at /build/buildd/glib2.0-2.37.3/./glib/gmain.c:3058
        dispatch = 0x7fdfe1a0b770 <g_io_unix_dispatch>
        was_in_call = 0
        user_data = 0x7fdfd8005560
        callback = 0x7fdfe1ed8990
        cb_funcs = 0x7fdfe1c81940 <g_source_callback_funcs>
        cb_data = 0x7fdfd00023d0
        need_destroy = <optimized out>
        current_source_link = {data = 0x7fdfd0002330, next = 0x0}
        source = 0x7fdfd0002330
        current = 0x17376c0
        i = 0
#8  g_main_context_dispatch (context=context@entry=0x172e450) at /build/buildd/glib2.0-2.37.3/./glib/gmain.c:3634
No locals.
#9  0x00007fdfe19cb3f8 in g_main_context_iterate (context=0x172e450, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.37.3/./glib/gmain.c:3705
        max_priority = 2147483647
        timeout = 1097
        some_ready = 1
        nfds = <optimized out>
        allocated_nfds = 2
        fds = 0x1738500
#10 0x00007fdfe19cb7fa in g_main_loop_run (loop=0x17384e0) at /build/buildd/glib2.0-2.37.3/./glib/gmain.c:3899
        __PRETTY_FUNCTION__ = "g_main_loop_run"
#11 0x00000000004050f1 in ?? ()
No symbol table info available.
#12 0x0000000000403138 in ?? ()
No symbol table info available.
#13 0x00007fdfe13bfea5 in __libc_start_main (main=0x4030e0, argc=4, ubp_av=0x7fff94d064c8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff94d064b8) at libc-start.c:260
        result = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, -7047357812610473753, 4206916, 140735690073280, 0, 0, 7047544940442116327, 7029278027540160743}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x405180, 0x7fff94d064c8}, data = {prev = 0x0, cleanup = 0x0, canceltype = 4215168}}}
        not_first_call = <optimized out>
#14 0x000000000040316d in ?? ()
No symbol table info available.