unity-greeter crashed with SIGSEGV in g_type_check_instance_is_a()

[Nicolas Pettiaux]

I was using the desktop and then the crash came.

ProblemType: Crash
DistroRelease: Ubuntu 13.10
Package: unity-greeter 13.10.2-0ubuntu1
ProcVersionSignature: Ubuntu 3.11.0-7.13-generic 3.11.0
Uname: Linux 3.11.0-7-generic x86_64
ApportVersion: 2.12.1-0ubuntu4
Architecture: amd64
Date: Sun Sep 15 07:47:21 2013
ExecutablePath: /usr/sbin/unity-greeter
MarkForUpload: True
ProcCmdline: /usr/sbin/unity-greeter
ProcEnviron:
 LANGUAGE=fr_BE:fr
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=fr_BE.UTF-8
 SHELL=/bin/false
SegvAnalysis:
 Segfault happened at: 0x7f176cb2ac9c <g_type_check_instance_is_a+60>: testb $0x4,0x16(%r8)
 PC (0x7f176cb2ac9c) ok
 source "$0x4" ok
 destination "0x16(%r8)" (0x686374614d646456) not located in a known VMA region (needed writable region)!
SegvReason: writing unknown VMA
Signal: 11
SourcePackage: unity-greeter
StacktraceTop:
 g_type_check_instance_is_a () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
 lightdm_layout_get_description () from /usr/lib/liblightdm-gobject-1.so.0
 ?? ()
 ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 ?? ()
Title: unity-greeter crashed with SIGSEGV in g_type_check_instance_is_a()
UpgradeStatus: Upgraded to saucy on 2013-08-28 (17 days ago)
UserGroups:

[Apport retracing service (apport)]

StacktraceTop:
 g_type_check_instance_is_a (type_instance=type_instance@entry=0x17a0260, iface_type=<optimized out>) at /build/buildd/glib2.0-2.37.93/./gobject/gtype.c:3975
 lightdm_layout_get_description (layout=layout@entry=0x17a0260) at layout.c:241
 menu_bar_cmp_layout (b=0x17a0260, a=<optimized out>) at menubar.c:1081
 _menu_bar_cmp_layout_gcompare_func (a=<optimized out>, b=0x17a0260) at menubar.c:1805
 g_list_sort_real (list=0x7ffffc9cbe20, compare_func=compare_func@entry=0x41dfd0 <_menu_bar_cmp_layout_gcompare_func>, user_data=user_data@entry=0x0) at /build/buildd/glib2.0-2.37.93/./glib/glist.c:1105