python2.7 crashed with SIGSEGV in QWidget::~QWidget()

Crashed running examples/graphicsview/anchorlayout.py from python-qt4-doc as python anchorlayout.py. If the demo is running from within examples/demos/qtdemo/qtdemo.py there is no crash.

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: python2.7-minimal 2.7.3-0ubuntu3
ProcVersionSignature: Ubuntu 3.2.0-24.37-generic-pae 3.2.14
Uname: Linux 3.2.0-24-generic-pae i686
ApportVersion: 2.0.1-0ubuntu7
Architecture: i386
Date: Thu May 3 11:30:38 2012
EcryptfsInUse: Yes
ExecutablePath: /usr/bin/python2.7
InstallationMedia: Kubuntu 11.04 "Natty Narwhal" - Beta i386 (20110330)
ProcCmdline: python anchorlayout.py
ProcEnviron:
 SHELL=/bin/bash
 TERM=xterm
 LANG=en_US.UTF-8
 LANGUAGE=
SegvAnalysis:
 Segfault happened at: 0xb58a12c8 <QWidget::~QWidget()+920>: mov 0x4(%eax),%eax
 PC (0xb58a12c8) ok
 source "0x4(%eax)" (0x00000004) not located in a known VMA region (needed readable region)!
 destination "%eax" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: python2.7
StacktraceTop:
 QWidget::~QWidget (this=0x9fc7598, __in_chrg=<optimized out>) at kernel/qwidget.cpp:1629
 QAbstractButton::~QAbstractButton (this=0x9fc7598, __in_chrg=<optimized out>) at widgets/qabstractbutton.cpp:599
 QPushButton::~QPushButton (this=0x9fc7598, __in_chrg=<optimized out>) at widgets/qpushbutton.cpp:295
 sipQPushButton::~sipQPushButton (this=0x9fc7598, __in_chrg=<optimized out>) at sipQtGuipart9.cpp:22677
 sipQPushButton::~sipQPushButton (this=0x9fc7598, __in_chrg=<optimized out>) at sipQtGuipart9.cpp:22680
Title: python2.7 crashed with SIGSEGV in QWidget::~QWidget()
UpgradeStatus: Upgraded to precise on 2012-04-09 (24 days ago)
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