gdm-session-worker[20257]: pam_unix(gdm:session): session opened for user ioni by (uid=0)
gdm-session-worker[20257]: GLib-GObject-CRITICAL: g_object_ref: assertion `G_IS_OBJECT (object)' failed
gdm-session-worker[20257]: GLib-GObject-WARNING: invalid (NULL) pointer instance
gdm-session-worker[20257]: GLib-GObject-CRITICAL: g_signal_handlers_disconnect_matched: assertion `G_TYPE_CHECK_INSTANCE (instance)' failed
gdm-session-worker[20257]: GLib-GObject-WARNING: invalid (NULL) pointer instance
gdm-session-worker[20257]: GLib-GObject-CRITICAL: g_signal_handlers_disconnect_matched: assertion `G_TYPE_CHECK_INSTANCE (instance)' failed
gdm-session-worker[20257]: CRITICAL: act_user_get_object_path: assertion `ACT_IS_USER (user)' failed
gdm-session-worker[20257]: CRITICAL: act_user_get_user_name: assertion `ACT_IS_USER (user)' failed
gdm[20512]: ******************* START **********************************
gdm[20512]: [Thread debugging using libthread_db enabled]
gdm[20512]: [New Thread 0xb712cb70 (LWP 20299)]
gdm[20512]: 0xb7762424 in __kernel_vsyscall ()
gdm[20512]: #0  0xb7762424 in __kernel_vsyscall ()
gdm[20512]: #1  0xb76ca7bb in waitpid () from /lib/libpthread.so.0
gdm[20512]: #2  0x08056939 in crashlogger_get_backtrace () at gdm-signal-handler.c:196
gdm[20512]: #3  0x080569e0 in gdm_signal_handler_backtrace () at gdm-signal-handler.c:223
gdm[20512]: #4  0x08056a62 in signal_handler (signo=11) at gdm-signal-handler.c:251
gdm[20512]: #5  <signal handler called>
gdm[20512]: #6  0xb75e2a7a in g_str_hash () from /usr/lib/libglib-2.0.so.0
gdm[20512]: #7  0xb75af826 in ?? () from /usr/lib/libglib-2.0.so.0
gdm[20512]: #8  0xb7577dba in remove_user (manager=0x93edc18, user=0x0) at act-user-manager.c:735
gdm[20512]: #9  0xb7578121 in on_user_removed_in_accounts_service (proxy=0x93ebb60, object_path=0x93fbf40 "/org/freedesktop/Accounts/User120", user_data=0x93edc18) at act-user-manager.c:844
gdm[20512]: #10 0xb76965a3 in g_cclosure_marshal_VOID__BOXED () from /usr/lib/libgobject-2.0.so.0
gdm[20512]: #11 0xb77242d4 in ?? () from /usr/lib/libdbus-glib-1.so.2
gdm[20512]: #12 0xb7679eb4 in g_closure_invoke () from /usr/lib/libgobject-2.0.so.0
gdm[20512]: #13 0xb768c1a0 in ?? () from /usr/lib/libgobject-2.0.so.0
gdm[20512]: #14 0xb769518c in g_signal_emit_valist () from /usr/lib/libgobject-2.0.so.0
gdm[20512]: #15 0xb7695313 in g_signal_emit () from /usr/lib/libgobject-2.0.so.0
gdm[20512]: #16 0xb7724f0d in ?? () from /usr/lib/libdbus-glib-1.so.2
gdm[20512]: #17 0xb76e6cd3 in dbus_connection_dispatch () from /usr/lib/libdbus-1.so.3
gdm[20512]: #18 0xb771cfcd in ?? () from /usr/lib/libdbus-glib-1.so.2
gdm[20512]: #19 0xb75c0eff in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
gdm[20512]: #20 0xb75c1660 in ?? () from /usr/lib/libglib-2.0.so.0
gdm[20512]: #21 0xb75c1d9b in g_main_loop_run () from /usr/lib/libglib-2.0.so.0
gdm[20512]: #22 0x0804beb6 in main (argc=1, argv=0xbf82aa34) at session-worker-main.c:203
gdm[20512]: 
gdm[20512]: Thread 2 (Thread 0xb712cb70 (LWP 20299)):
gdm[20512]: #0  0xb7762424 in __kernel_vsyscall ()
gdm[20512]: No symbol table info available.
gdm[20512]: #1  0xb76c981b in read () from /lib/libpthread.so.0
gdm[20512]: No symbol table info available.
gdm[20512]: #2  0xb75c2d6f in ?? () from /usr/lib/libglib-2.0.so.0
gdm[20512]: No symbol table info available.
gdm[20512]: #3  0xb75e8564 in ?? () from /usr/lib/libglib-2.0.so.0
gdm[20512]: No symbol table info available.
gdm[20512]: #4  0xb76c2c77 in start_thread () from /lib/libpthread.so.0
gdm[20512]: No symbol table info available.
gdm[20512]: #5  0xb74d9c6e in clone () from /lib/libc.so.6
gdm[20512]: No symbol table info available.
gdm[20512]: 
gdm[20512]: Thread 1 (Thread 0xb73866c0 (LWP 20257)):
gdm[20512]: #0  0xb7762424 in __kernel_vsyscall ()
gdm[20512]: No symbol table info available.
gdm[20512]: #1  0xb76ca7bb in waitpid () from /lib/libpthread.so.0
gdm[20512]: No symbol table info available.
gdm[20512]: #2  0x08056939 in crashlogger_get_backtrace () at gdm-signal-handler.c:196
gdm[20512]: 
gdm[20512]: 
gdm[20512]: 
gdm[20512]: #3  0x080569e0 in gdm_signal_handler_backtrace () at gdm-signal-handler.c:223
gdm[20512]: 
gdm[20512]: 
gdm[20512]: #4  0x08056a62 in signal_handler (signo=11) at gdm-signal-handler.c:251
gdm[20512]: 
gdm[20512]: 
gdm[20512]: 
gdm[20512]: #5  <signal handler called>
gdm[20512]: No symbol table info available.
gdm[20512]: #6  0xb75e2a7a in g_str_hash () from /usr/lib/libglib-2.0.so.0
gdm[20512]: No symbol table info available.
gdm[20512]: #7  0xb75af826 in ?? () from /usr/lib/libglib-2.0.so.0
gdm[20512]: No symbol table info available.
gdm[20512]: #8  0xb7577dba in remove_user (manager=0x93edc18, user=0x0) at act-user-manager.c:735
gdm[20512]: No locals.
gdm[20512]: #9  0xb7578121 in on_user_removed_in_accounts_service (proxy=0x93ebb60, object_path=0x93fbf40 "/org/freedesktop/Accounts/User120", user_data=0x93edc18) at act-user-manager.c:844
gdm[20512]:         manager = 0x93edc18
gdm[20512]:         user = 0x0
gdm[20512]: #10 0xb76965a3 in g_cclosure_marshal_VOID__BOXED () from /usr/lib/libgobject-2.0.so.0
gdm[20512]: No symbol table info available.
gdm[20512]: #11 0xb77242d4 in ?? () from /usr/lib/libdbus-glib-1.so.2
gdm[20512]: No symbol table info available.
gdm[20512]: #12 0xb7679eb4 in g_closure_invoke () from /usr/lib/libgobject-2.0.so.0
gdm[20512]: No symbol table info available.
gdm[20512]: #13 0xb768c1a0 in ?? () from /usr/lib/libgobject-2.0.so.0
gdm[20512]: No symbol table info available.
gdm[20512]: #14 0xb769518c in g_signal_emit_valist () from /usr/lib/libgobject-2.0.so.0
gdm[20512]: No symbol table info available.
gdm[20512]: #15 0xb7695313 in g_signal_emit () from /usr/lib/libgobject-2.0.so.0
gdm[20512]: No symbol table info available.
gdm[20512]: #16 0xb7724f0d in ?? () from /usr/lib/libdbus-glib-1.so.2
gdm[20512]: No symbol table info available.
gdm[20512]: #17 0xb76e6cd3 in dbus_connection_dispatch () from /usr/lib/libdbus-1.so.3
gdm[20512]: No symbol table info available.
gdm[20512]: #18 0xb771cfcd in ?? () from /usr/lib/libdbus-glib-1.so.2
gdm[20512]: No symbol table info available.
gdm[20512]: #19 0xb75c0eff in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
gdm[20512]: No symbol table info available.
gdm[20512]: #20 0xb75c1660 in ?? () from /usr/lib/libglib-2.0.so.0
gdm[20512]: No symbol table info available.
gdm[20512]: #21 0xb75c1d9b in g_main_loop_run () from /usr/lib/libglib-2.0.so.0
gdm[20512]: No symbol table info available.
gdm[20512]: #22 0x0804beb6 in main (argc=1, argv=0xbf82aa34) at session-worker-main.c:203
gdm[20512]:         main_loop = 0x93eb530
gdm[20512]:         context = 0x93e38f0
gdm[20512]:         worker = 0x93ed000
gdm[20512]:         signal_handler = 0x93e64a0
gdm[20512]: 
gdm[20512]: 
gdm[20512]: A debugging session is active.
gdm[20512]: 
gdm[20512]: 	Inferior 1 [process 20257] will be detached.
gdm[20512]: 
gdm[20512]: Quit anyway? (y or n) [answered Y; input not from terminal]
gdm[20512]: ******************* END **********************************