unity-2d-launcher crashed with SIGSEGV in data()

[Luke Yelavich]

Running precise, accessibility is enabled, using Orca with Unity-2d.

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: unity-2d-launcher 4.12.0-0ubuntu2
ProcVersionSignature: Ubuntu 3.1.0-2.3-generic 3.1.0
Uname: Linux 3.1.0-2-generic x86_64
ApportVersion: 1.90-0ubuntu1
Architecture: amd64
CrashCounter: 1
Date: Fri Nov 25 11:24:42 2011
EcryptfsInUse: Yes
ExecutablePath: /usr/bin/unity-2d-launcher
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha amd64 (20111115)
ProcCmdline: unity-2d-launcher
ProcEnviron:
 LANGUAGE=en_AU:en
 PATH=(custom, no user)
 LANG=en_AU.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x7f4cf5e55236 <_ZN7QLayout11widgetEventEP6QEvent+22>: mov 0x8(%rdi),%rbx
 PC (0x7f4cf5e55236) ok
 source "0x8(%rdi)" (0x00610268) not located in a known VMA region (needed readable region)!
 destination "%rbx" ok
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: unity-2d
StacktraceTop:
 QLayout::widgetEvent(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
 QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
 QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
 QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
 QAccessible::queryAccessibleInterface(QObject*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
Title: unity-2d-launcher crashed with SIGSEGV in QLayout::widgetEvent()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sbuild sudo

[Apport retracing service (apport)]

StacktraceTop:
 data (this=0x610268) at ../../include/QtCore/../../src/corelib/tools/qscopedpointer.h:135
 qGetPtrHelper<QScopedPointer<QObjectData> > (p=...) at ../../include/QtCore/../../src/corelib/global/qglobal.h:2343
 d_func (this=0x610260) at ../../include/QtGui/../../src/gui/kernel/qlayout.h:93
 QLayout::widgetEvent (this=0x610260, e=0x7fff6e11b610) at kernel/qlayout.cpp:697
 notify_helper (e=0x7fff6e11b610, receiver=0x7f4ce0186df0, this=0x7f4ce0001cb0) at kernel/qapplication.cpp:4477