unity-2d-shell crashed with SIGSEGV in QDBusAbstractInterfacePrivate::canMakeCalls()

[Jorge Antonio Dias Romero]

I pressed Alt to call the HUD display.

I typed "cont" to see the options related with "contacts" (in portuguese, "contatos").

Before i finished typing, the system hanged. Nothing happens (no options appeared). Then, after a while, the apport generate a report and lead me to this page to provide this information. The summary also filled automactly.

I could'nt reproduce the error. Sometimes it occurs, sometimes not, and I am not able yet to figure out what's could be happening.
This error don't appear to be related to a specific program or command.

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: unity-2d-shell 5.6.0-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-18.28-generic-pae 3.2.9
Uname: Linux 3.2.0-18-generic-pae i686
NonfreeKernelModules: wl
ApportVersion: 1.94-0ubuntu1
Architecture: i386
CrashCounter: 1
Date: Mon Mar 5 19:53:10 2012
ExecutablePath: /usr/bin/unity-2d-shell
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Beta i386 (20120301)
ProcCmdline: unity-2d-shell
ProcEnviron:
 LANGUAGE=pt_BR:pt:en
 PATH=(custom, no user)
 LANG=pt_BR.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0xb69247f5: mov 0x8(%eax),%edi
 PC (0xb69247f5) ok
 source "0x8(%eax)" (0x00000008) not located in a known VMA region (needed readable region)!
 destination "%edi" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: unity-2d
StacktraceTop:
 ?? () from /usr/lib/i386-linux-gnu/libQtDBus.so.4
 QDBusAbstractInterface::asyncCallWithArgumentList(QString const&, QList<QVariant> const&) () from /usr/lib/i386-linux-gnu/libQtDBus.so.4
 BamfView::icon() const () from /usr/lib/libQtBamf.so.1
 WindowInfo::icon() const () from /usr/lib/libunity-2d-private.so.0
 WindowInfo::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libunity-2d-private.so.0
Title: unity-2d-shell crashed with SIGSEGV in QDBusAbstractInterface::asyncCallWithArgumentList()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip disk lpadmin plugdev sambashare sudo

[Apport retracing service (apport)]

StacktraceTop:
 QDBusAbstractInterfacePrivate::canMakeCalls (this=0x92e2588) at qdbusabstractinterface.cpp:112
 QDBusAbstractInterface::asyncCallWithArgumentList (this=0xbb2d418, method=..., args=...) at qdbusabstractinterface.cpp:495
 Icon (this=<optimized out>) at /build/buildd/libqtbamf-0.2.3/bamf-view-proxy.h:64
 BamfView::icon (this=0x0) at /build/buildd/libqtbamf-0.2.3/bamf-view.cpp:127
 WindowInfo::icon (this=0x9f24830) at /build/buildd/unity-2d-5.6.0/libunity-2d-private/src/windowinfo.cpp:209