unity-applications-daemon crashed with SIGSEGV in dee_sequence_model_free_row()

[Chenheting]

I just restared ubuntun 12.04 and got this bug.

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: unity-lens-applications 5.4.0-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-16.25-generic-pae 3.2.6
Uname: Linux 3.2.0-16-generic-pae i686
NonfreeKernelModules: wl
ApportVersion: 1.91-0ubuntu1
Architecture: i386
CrashCounter: 1
Date: Sun Feb 19 13:39:31 2012
ExecutablePath: /usr/lib/unity-lens-applications/unity-applications-daemon
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha i386 (20120211)
ProcCmdline: /usr/lib/unity-lens-applications/unity-applications-daemon
ProcEnviron:
 SHELL=/bin/bash
 PATH=(custom, no user)
 LANGUAGE=en_SG:en
 LANG=en_SG.UTF-8
SegvAnalysis:
 Segfault happened at: 0xb769b978: mov (%edi,%esi,4),%eax
 PC (0xb769b978) ok
 source "(%edi,%esi,4)" (0x00000000) not located in a known VMA region (needed readable region)!
 destination "%eax" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: unity-lens-applications
StacktraceTop:
 ?? () from /usr/lib/libdee-1.0.so.4
 ?? () from /usr/lib/libdee-1.0.so.4
 dee_model_remove () from /usr/lib/libdee-1.0.so.4
 ?? () from /usr/lib/libdee-1.0.so.4
 dee_model_remove () from /usr/lib/libdee-1.0.so.4
Title: unity-applications-daemon crashed with SIGSEGV in dee_model_remove()
UpgradeStatus: Upgraded to precise on 2012-02-18 (1 days ago)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

[Apport retracing service (apport)]

StacktraceTop:
 dee_sequence_model_free_row (self=<optimized out>, iter=0x81e9b48) at dee-sequence-model.c:981
 dee_sequence_model_remove (self=0x81be608, iter_=0x81e9b48) at dee-sequence-model.c:482
 dee_model_remove (self=0x81be608, iter=0x81e9b48) at dee-model.c:1158
 dee_proxy_model_remove (self=0x80d3500, iter=0x81e9b48) at dee-proxy-model.c:522
 dee_model_remove (self=0x80d3500, iter=0x81e9b48) at dee-model.c:1158

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.