Thread 5 (Thread 0x7f37ac8de700 (LWP 9990)):
#0  0x00007f37cd220bad in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f37cdc80fe4 in g_main_context_poll (priority=2147483647, n_fds=2, 
    fds=0x7f37a80008c0, timeout=3997, context=0xaf4bb0)
    at /build/buildd/glib2.0-2.40.2/./glib/gmain.c:4028
#2  g_main_context_iterate (context=context@entry=0xaf4bb0, 
    block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>)
    at /build/buildd/glib2.0-2.40.2/./glib/gmain.c:3729
#3  0x00007f37cdc810ec in g_main_context_iteration (context=0xaf4bb0, 
    may_block=may_block@entry=1)
    at /build/buildd/glib2.0-2.40.2/./glib/gmain.c:3795
#4  0x00007f37cdc81129 in glib_worker_main (data=<optimized out>)
    at /build/buildd/glib2.0-2.40.2/./glib/gmain.c:5541
#5  0x00007f37cdca5f05 in g_thread_proxy (data=0xaca0a0)
    at /build/buildd/glib2.0-2.40.2/./glib/gthread.c:764
#6  0x00007f37cd501182 in start_thread (arg=0x7f37ac8de700)
    at pthread_create.c:312
#7  0x00007f37cd22defd in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 4 (Thread 0x7f37c2b34700 (LWP 10010)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 ()
    at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
#1  0x00007f37cdcc2ce5 in g_cond_wait_until (cond=cond@entry=0xa7d428, 
    mutex=mutex@entry=0xa7d420, end_time=end_time@entry=492434501192)
    at /build/buildd/glib2.0-2.40.2/./glib/gthread-posix.c:898
#2  0x00007f37cdc571c1 in g_async_queue_pop_intern_unlocked (
    queue=queue@entry=0xa7d420, wait=wait@entry=1, 
    end_time=end_time@entry=492434501192)
    at /build/buildd/glib2.0-2.40.2/./glib/gasyncqueue.c:422
#3  0x00007f37cdc5774b in g_async_queue_timeout_pop (queue=0xa7d420, 
    timeout=timeout@entry=15000000)
    at /build/buildd/glib2.0-2.40.2/./glib/gasyncqueue.c:543
#4  0x00007f37cdca6956 in g_thread_pool_wait_for_new_pool ()
    at /build/buildd/glib2.0-2.40.2/./glib/gthreadpool.c:167
#5  g_thread_pool_thread_proxy (data=<optimized out>)
    at /build/buildd/glib2.0-2.40.2/./glib/gthreadpool.c:364
#6  0x00007f37cdca5f05 in g_thread_proxy (data=0x7f37b4007a80)
    at /build/buildd/glib2.0-2.40.2/./glib/gthread.c:764
#7  0x00007f37cd501182 in start_thread (arg=0x7f37c2b34700)
    at pthread_create.c:312
#8  0x00007f37cd22defd in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 3 (Thread 0x7f37c2126700 (LWP 9989)):
#0  0x00007f37cd220bad in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f37cdc80fe4 in g_main_context_poll (priority=2147483647, n_fds=1, 
    fds=0x7f37b80010c0, timeout=-1, context=0xa7b900)
    at /build/buildd/glib2.0-2.40.2/./glib/gmain.c:4028
#2  g_main_context_iterate (context=context@entry=0xa7b900, 
    block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>)
    at /build/buildd/glib2.0-2.40.2/./glib/gmain.c:3729
#3  0x00007f37cdc810ec in g_main_context_iteration (context=0xa7b900, 
    may_block=1) at /build/buildd/glib2.0-2.40.2/./glib/gmain.c:3795
#4  0x00007f37c212e1ad in ?? ()
   from /tmp/apport_sandbox_UQofJe/usr/lib/x86_64-linux-gnu/gio/modules/libdconfsettings.so
#5  0x00007f37cdca5f05 in g_thread_proxy (data=0xad2590)
    at /build/buildd/glib2.0-2.40.2/./glib/gthread.c:764
#6  0x00007f37cd501182 in start_thread (arg=0x7f37c2126700)
    at pthread_create.c:312
#7  0x00007f37cd22defd in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 2 (Thread 0x7f37c45ae700 (LWP 9987)):
#0  0x00007f37cd220bad in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f37cdc80fe4 in g_main_context_poll (priority=2147483647, n_fds=3, 
    fds=0x7f37bc0010e0, timeout=-1, context=0x983cf0)
    at /build/buildd/glib2.0-2.40.2/./glib/gmain.c:4028
#2  g_main_context_iterate (context=0x983cf0, block=block@entry=1, 
    dispatch=dispatch@entry=1, self=<optimized out>)
    at /build/buildd/glib2.0-2.40.2/./glib/gmain.c:3729
#3  0x00007f37cdc8130a in g_main_loop_run (loop=0x983c80)
    at /build/buildd/glib2.0-2.40.2/./glib/gmain.c:3928
#4  0x00007f37ce268336 in gdbus_shared_thread_func (user_data=0x983cc0)
    at /build/buildd/glib2.0-2.40.2/./gio/gdbusprivate.c:273
#5  0x00007f37cdca5f05 in g_thread_proxy (data=0x965720)
    at /build/buildd/glib2.0-2.40.2/./glib/gthread.c:764
#6  0x00007f37cd501182 in start_thread (arg=0x7f37c45ae700)
    at pthread_create.c:312
#7  0x00007f37cd22defd in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 1 (Thread 0x7f37d1868a40 (LWP 9985)):
#0  0x00007f37cd17e8f3 in _IO_vfprintf_internal (s=s@entry=0x7fff36e8aa30, 
    format=<optimized out>, format@entry=0x4f454e "%s\n%s", 
    ap=ap@entry=0x7fff36e8aba8) at vfprintf.c:1661
#1  0x00007f37cd23df75 in __GI___vasprintf_chk (
    result_ptr=result_ptr@entry=0x7fff36e8ab88, flags=flags@entry=1, 
    format=0x4f454e "%s\n%s", format@entry=0x7fff36e8ab88 "", 
    args=0x7fff36e8aba8) at vasprintf_chk.c:66
#2  0x00007f37cdcc20fc in vasprintf (__ap=<optimized out>, 
    __fmt=0x7fff36e8ab88 "", __ptr=0x7fff36e8ab88)
    at /usr/include/x86_64-linux-gnu/bits/stdio2.h:210
#3  g_vasprintf (string=string@entry=0x7fff36e8ab88, format=<optimized out>, 
    args=args@entry=0x7fff36e8aba8)
    at /build/buildd/glib2.0-2.40.2/./glib/gprintf.c:316
#4  0x00007f37cdc9dc80 in g_strdup_vprintf (format=<optimized out>, 
    args=args@entry=0x7fff36e8aba8)
    at /build/buildd/glib2.0-2.40.2/./glib/gstrfuncs.c:507
#5  0x00007f37cdc9dd1c in g_strdup_printf (
    format=format@entry=0x4f454e "%s\n%s")
    at /build/buildd/glib2.0-2.40.2/./glib/gstrfuncs.c:533
#6  0x0000000000454c9b in synch_user_menu (combo_box=combo_box@entry=0xef2230, 
    file=file@entry=0xe207b0) at nautilus-properties-window.c:2024
#7  0x00000000004580b2 in attach_owner_combo_box (file=0xe207b0, 
    sibling=<optimized out>, grid=0x7f37b4019700)
    at nautilus-properties-window.c:2055
#8  create_simple_permissions (page_grid=0x7f37b4019700, window=0xeccc30)
    at nautilus-properties-window.c:4216
#9  create_permissions_page (window=<optimized out>)
    at nautilus-properties-window.c:4565
#10 create_properties_window (startup_data=0xeb9d60)
    at nautilus-properties-window.c:4941
#11 is_directory_ready_callback (file=<optimized out>, data=0xeb9d60)
    at nautilus-properties-window.c:5076
#12 0x00000000004a4213 in call_ready_callbacks_at_idle (
    callback_data=<optimized out>) at nautilus-directory-async.c:1853
#13 0x00007f37cdc80ce5 in g_main_dispatch (context=0x972cb0)
    at /build/buildd/glib2.0-2.40.2/./glib/gmain.c:3064
#14 g_main_context_dispatch (context=context@entry=0x972cb0)
    at /build/buildd/glib2.0-2.40.2/./glib/gmain.c:3663
#15 0x00007f37cdc81048 in g_main_context_iterate (
    context=context@entry=0x972cb0, block=block@entry=1, 
    dispatch=dispatch@entry=1, self=<optimized out>)
    at /build/buildd/glib2.0-2.40.2/./glib/gmain.c:3734
#16 0x00007f37cdc810ec in g_main_context_iteration (context=0x972cb0, 
    context@entry=0x0, may_block=may_block@entry=1)
    at /build/buildd/glib2.0-2.40.2/./glib/gmain.c:3795
#17 0x00007f37ce233b9c in g_application_run (application=0x9491d0, 
    argc=argc@entry=1, argv=argv@entry=0x7fff36e8b0a8)
    at /build/buildd/glib2.0-2.40.2/./gio/gapplication.c:2115
#18 0x000000000042ba01 in main (argc=1, argv=0x7fff36e8b0a8)
    at nautilus-main.c:103