unity-2d-shell crashed with SIGSEGV in QMetaObject::changeGuard()

[Mijalce Santa]

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ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: unity-2d-shell 5.10.0-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-23.36-generic 3.2.14
Uname: Linux 3.2.0-23-generic x86_64
ApportVersion: 2.0.1-0ubuntu2
Architecture: amd64
Date: Fri Apr 13 18:58:18 2012
ExecutablePath: /usr/bin/unity-2d-shell
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
ProcCmdline: unity-2d-shell
SegvAnalysis:
 Segfault happened at: 0x7f5ffceda879 <_ZN11QMetaObject11changeGuardEPP7QObjectS1_+473>: mov 0x8(%rax),%rax
 PC (0x7f5ffceda879) ok
 source "0x8(%rax)" (0x81d12082d1b5d0c2) not located in a known VMA region (needed readable region)!
 destination "%rax" ok
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: unity-2d
StacktraceTop:
 QMetaObject::changeGuard(QObject**, QObject*) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
 Application::setBamfApplication(BamfApplication*) () from /usr/lib/libunity-2d-private.so.0
 ApplicationsList::insertBamfApplication(BamfApplication*) () from /usr/lib/libunity-2d-private.so.0
 QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
 BamfMatcher::ViewOpened(BamfView*) () from /usr/lib/libQtBamf.so.1
Title: unity-2d-shell crashed with SIGSEGV in QMetaObject::changeGuard()
UpgradeStatus: Upgraded to precise on 2012-03-23 (20 days ago)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare vboxusers

[Apport retracing service (apport)]

StacktraceTop:
 QMetaObject::changeGuard(QObject**, QObject*) () from /tmp/tmpvjLkWn/usr/lib/x86_64-linux-gnu/libQtCore.so.4
 Application::setBamfApplication(BamfApplication*) () from /tmp/tmpvjLkWn/usr/lib/libunity-2d-private.so.0
 ApplicationsList::insertBamfApplication(BamfApplication*) () from /tmp/tmpvjLkWn/usr/lib/libunity-2d-private.so.0
 QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /tmp/tmpvjLkWn/usr/lib/x86_64-linux-gnu/libQtCore.so.4
 BamfMatcher::ViewOpened (this=<optimized out>, _t1=0x2149970) at /build/buildd/libqtbamf-0.2.3/obj-x86_64-linux-gnu/moc_bamf-matcher.cxx:158

[John Pye (jdpipe)]

still critical? I just experienced this error now on Ubuntu 12.04, latest updated version, 64-bit.