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Reading symbols from /usr/bin/gdm...Reading symbols from /usr/lib/debug/.build-id/bd/8c00197047ca08c942c781bb26ed8328a6cc94.debug...done.
done.
[New LWP 797]
[New LWP 804]
[New LWP 798]
[New LWP 799]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/libthread_db.so.1".
Core was generated by `/usr/bin/gdm'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  _int_malloc (av=av@entry=0x7f4d152b5cc0 <main_arena>, bytes=bytes@entry=3)
    at malloc.c:3340
3340	      while ((pp = catomic_compare_and_exchange_val_acq (fb, victim->fd, victim))
(gdb) 
Thread 4 (Thread 0x7f4d11dc6700 (LWP 799)):
#0  0x00007f4d14ff49fd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f4d15bb8ed4 in g_main_context_poll (priority=2147483647, n_fds=1, 
    fds=0x7f4d040008c0, timeout=-1, context=0x1622880)
    at ../../glib/gmain.c:4103
#2  g_main_context_iterate (context=context@entry=0x1622880, 
    block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>)
    at ../../glib/gmain.c:3803
#3  0x00007f4d15bb8fdc in g_main_context_iteration (context=0x1622880, 
    may_block=may_block@entry=1) at ../../glib/gmain.c:3869
#4  0x00007f4d15bb9019 in glib_worker_main (data=<optimized out>)
    at ../../glib/gmain.c:5622
#5  0x00007f4d15bded65 in g_thread_proxy (data=0x1621140)
    at ../../glib/gthread.c:764
#6  0x00007f4d152c7234 in start_thread (arg=0x7f4d11dc6700)
    at pthread_create.c:313
#7  0x00007f4d14fffffd in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f4d125c7700 (LWP 798)):
#0  0x00007f4d14ff49fd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f4d15bb8ed4 in g_main_context_poll (priority=2147483647, n_fds=3, 
    fds=0x7f4d0c0010e0, timeout=-1, context=0x161ec40)
    at ../../glib/gmain.c:4103
#2  g_main_context_iterate (context=0x161ec40, block=block@entry=1, 
    dispatch=dispatch@entry=1, self=<optimized out>)
    at ../../glib/gmain.c:3803
#3  0x00007f4d15bb9252 in g_main_loop_run (loop=0x161ebd0)
    at ../../glib/gmain.c:4002
#4  0x00007f4d161e2176 in gdbus_shared_thread_func (user_data=0x161ec10)
    at ../../gio/gdbusprivate.c:274
#5  0x00007f4d15bded65 in g_thread_proxy (data=0x1621050)
    at ../../glib/gthread.c:764
#6  0x00007f4d152c7234 in start_thread (arg=0x7f4d125c7700)
    at pthread_create.c:313
#7  0x00007f4d14fffffd in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f4d115c5700 (LWP 804)):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007f4d15bfc0a2 in g_cond_wait_until (cond=cond@entry=0x16250c8, 
    mutex=mutex@entry=0x16250c0, end_time=end_time@entry=35355162)
    at ../../glib/gthread-posix.c:1442
#2  0x00007f4d15b8e8e9 in g_async_queue_pop_intern_unlocked (
    queue=queue@entry=0x16250c0, wait=wait@entry=1, 
    end_time=end_time@entry=35355162) at ../../glib/gasyncqueue.c:422
#3  0x00007f4d15b8eedb in g_async_queue_timeout_pop (queue=0x16250c0, 
    timeout=timeout@entry=15000000) at ../../glib/gasyncqueue.c:543
#4  0x00007f4d15bdf7ac in g_thread_pool_wait_for_new_pool ()
    at ../../glib/gthreadpool.c:167
#5  g_thread_pool_thread_proxy (data=<optimized out>)
    at ../../glib/gthreadpool.c:364
#6  0x00007f4d15bded65 in g_thread_proxy (data=0x1621630)
    at ../../glib/gthread.c:764
#7  0x00007f4d152c7234 in start_thread (arg=0x7f4d115c5700)
    at pthread_create.c:313
#8  0x00007f4d14fffffd in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f4d16bd6780 (LWP 797)):
#0  _int_malloc (av=av@entry=0x7f4d152b5cc0 <main_arena>, bytes=bytes@entry=3)
    at malloc.c:3340
#1  0x00007f4d14f940de in __GI___libc_malloc (bytes=3) at malloc.c:2890
#2  0x00007f4d15bbe57a in g_malloc (n_bytes=n_bytes@entry=3)
    at ../../glib/gmem.c:97
#3  0x00007f4d15bd6928 in g_memdup (mem=mem@entry=0x7ffe8b7940c0, byte_size=3)
    at ../../glib/gstrfuncs.c:384
#4  0x00007f4d15bfa722 in g_variant_type_new_tuple (
    items=items@entry=0x1647ec0, length=<optimized out>, length@entry=1)
    at ../../glib/gvarianttype.c:1112
#5  0x00007f4d15bec251 in g_variant_make_tuple_type (children=0x164b6f0, 
    n_children=1) at ../../glib/gvariant.c:804
#6  0x00007f4d15bef5bd in g_variant_builder_end (
    builder=builder@entry=0x7ffe8b794560) at ../../glib/gvariant.c:3603
#7  0x00007f4d15bf0f43 in g_variant_valist_new (str=str@entry=0x7ffe8b794608, 
    app=app@entry=0x7ffe8b794638) at ../../glib/gvariant.c:5083
#8  0x00007f4d15bf12b7 in g_variant_new_va (format_string=0x7f4d1622ca05 "", 
    endptr=0x0, app=0x7ffe8b794638) at ../../glib/gvariant.c:5256
#9  0x00007f4d15bf151d in g_variant_new (format_string=0x7f4d1622ca02 "(v)")
    at ../../glib/gvariant.c:5191
#10 0x00007f4d161d2fc2 in invoke_get_property_in_idle_cb (
    _data=0x7f4d0c0064f0) at ../../gio/gdbusconnection.c:4180
#11 0x00007f4d15bb8b9d in g_main_dispatch (context=0x1614c80)
    at ../../glib/gmain.c:3122
#12 g_main_context_dispatch (context=context@entry=0x1614c80)
    at ../../glib/gmain.c:3737
#13 0x00007f4d15bb8f38 in g_main_context_iterate (context=0x1614c80, 
    block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>)
    at ../../glib/gmain.c:3808
#14 0x00007f4d15bb9252 in g_main_loop_run (loop=0x160a240)
    at ../../glib/gmain.c:4002
#15 0x000000000040a2c1 in main (argc=1, argv=0x7ffe8b794a18)
    at ../../daemon/main.c:404
(gdb) quit
           PID: 797 (gdm)
           UID: 0 (root)
           GID: 0 (root)
        Signal: 11 (SEGV)
     Timestamp: Fri 2015-04-03 18:26:08 BST (19s ago)
  Command Line: /usr/bin/gdm
    Executable: /usr/bin/gdm
 Control Group: /system.slice/gdm.service
          Unit: gdm.service
         Slice: system.slice
       Boot ID: a372bdbfbb9b41bfa89b3d251c6fb238
    Machine ID: 45bb3b96146aa94f299b9eb43646eb35
      Hostname: vrutkovs-continuous-1454
      Coredump: /var/lib/systemd/coredump/core.gdm.0.a372bdbfbb9b41bfa89b3d251c6fb238.797.1428081968000000.xz
       Message: Process 797 (gdm) of user 0 dumped core.

