unity-greeter crashed with SIGSEGV in gdk_window_focus()

[Yann Dìnendal]

Happened after closing the greater's test mode (unity-greeter --test-mode).

ProblemType: Crash
DistroRelease: Ubuntu 12.10
Package: unity-greeter 12.10.4-0ubuntu1
ProcVersionSignature: Ubuntu 3.5.0-16.25-generic 3.5.4
Uname: Linux 3.5.0-16-generic i686
NonfreeKernelModules: nvidia
ApportVersion: 2.6.1-0ubuntu1
Architecture: i386
CheckboxSubmission: 11efad21996f3973554f776fd77a8857
CheckboxSystem: e884839b1147d494b3cc922c5deb0043
Date: Wed Oct 3 00:59:33 2012
ExecutablePath: /usr/sbin/unity-greeter
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Beta i386 (20110901)
ProcCmdline: unity-greeter --test-mode
SegvAnalysis:
 Segfault happened at: 0xb71a07bb <gdk_window_focus+11>: mov 0xc(%eax),%edx
 PC (0xb71a07bb) ok
 source "0xc(%eax)" (0x0000000c) not located in a known VMA region (needed readable region)!
 destination "%edx" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: unity-greeter
StacktraceTop:
 gdk_window_focus () from /usr/lib/i386-linux-gnu/libgdk-3.so.0
 ?? ()
 ?? () from /usr/lib/i386-linux-gnu/libgdk-3.so.0
 ?? () from /usr/lib/i386-linux-gnu/libgdk-3.so.0
 gdk_display_get_event () from /usr/lib/i386-linux-gnu/libgdk-3.so.0
Title: unity-greeter crashed with SIGSEGV in gdk_window_focus()
UpgradeStatus: Upgraded to quantal on 2012-09-05 (27 days ago)
UserGroups: adm admin cdrom dialout disk lpadmin plugdev sambashare

[Apport retracing service (apport)]

StacktraceTop:
 gdk_window_focus (window=0x0, timestamp=timestamp@entry=0) at /build/buildd/gtk+3.0-3.6.0/./gdk/gdkwindow.c:10156
 unity_greeter_focus_upon_map (event=0x91c1080, gxevent=0xbf98d14c, self=0x8f7ee60) at unity-greeter.c:1042
 _unity_greeter_focus_upon_map_gdk_filter_func (xevent=0xbf98d14c, event=0x91c1080, self=0x8f7ee60) at unity-greeter.c:1070
 gdk_event_apply_filters (xevent=xevent@entry=0xbf98d14c, event=event@entry=0x91c1080, window=window@entry=0x8ed2000) at /build/buildd/gtk+3.0-3.6.0/./gdk/x11/gdkeventsource.c:81
 gdk_event_source_translate_event (xevent=0xbf98d14c, event_source=0x8edde08) at /build/buildd/gtk+3.0-3.6.0/./gdk/x11/gdkeventsource.c:202