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[Launchpad Bug Tracker <1243654@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package hud - 13.10.1+13.10.20131031-0ubuntu1

---------------
hud (13.10.1+13.10.20131031-0ubuntu1) saucy; urgency=low

  [ Charles Kerr ]
  * If we can't get the busname, log a g_critical and then exit
    gracefully instead of abort()ing in g_error. (LP: #1244688)
  * Add a null safeguard when accessing window SharedPtrs held in the
    m_windows QMap. (LP: #1243654)

  [ Ubuntu daily release ]
  * Automatic snapshot from revision 344
 -- Ubuntu daily release <ps-jenkins@xxxxxxxxxxxxxxxxxxx>   Thu, 31 Oct 2013 23:12:19 +0000

** Changed in: hud (Ubuntu Saucy)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1243654

Title:
  window-stack-bridge crashed with SIGSEGV in BamfWindow::windowId()

Status in “hud” package in Ubuntu:
  Fix Released
Status in “hud” source package in Saucy:
  Fix Released

Bug description:
  SRU for saucy.

  [Impact]

  A crash in certain situations.

  [Test Case]

  A crasher, no clear test case. Ensure errors.ubuntu.com stops
  reporting this.  The bucket is at:

  https://errors.ubuntu.com/bucket/?id=/usr/lib/x86_64-linux-gnu/hud
  /window-stack-
  bridge:11:BamfWindow::windowId:BamfWindowStack::ActiveWindowChanged:BamfWindowStack::qt_static_metacall:QMetaObject::activate:OrgAyatanaBamfMatcherInterface::ActiveWindowChanged

  
  [Regression Potential]

  Low, a null safe guard added in three places.

  ProblemType: CrashDistroRelease: Ubuntu 13.10
  Package: hud 13.10.1+13.10.20131014-0ubuntu1
  ProcVersionSignature: Ubuntu 3.11.0-12.19-generic 3.11.3
  Uname: Linux 3.11.0-12-generic x86_64
  ApportVersion: 2.12.5-0ubuntu2
  Architecture: amd64
  CrashCounter: 1
  Date: Wed Oct 23 13:44:21 2013
  ExecutablePath: /usr/lib/x86_64-linux-gnu/hud/window-stack-bridge
  InstallationDate: Installed on 2012-11-10 (346 days ago)
  InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
  MarkForUpload: True
  ProcCmdline: /usr/lib/x86_64-linux-gnu/hud/window-stack-bridge
  SegvAnalysis:
   Segfault happened at: 0x409b70 <_ZN10BamfWindow8windowIdEv>:	mov    0x24(%rdi),%eax
   PC (0x00409b70) ok
   source "0x24(%rdi)" (0x00000024) not located in a known VMA region (needed readable region)!
   destination "%eax" ok
  SegvReason: reading NULL VMA
  Signal: 11SourcePackage: hud
  StacktraceTop:
   BamfWindow::windowId() ()
   BamfWindowStack::ActiveWindowChanged(QString const&, QString const&) ()
   ?? ()
   QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
   OrgAyatanaBamfMatcherInterface::ActiveWindowChanged(QString const&, QString const&) ()
  Title: window-stack-bridge crashed with SIGSEGV in BamfWindow::windowId()
  UpgradeStatus: Upgraded to saucy on 2013-10-18 (4 days ago)
  UserGroups: adm cdrom dip libvirtd lpadmin plugdev sambashare sudo
  upstart.hud.log: (process:1812): hudapplicationsource-WARNING **: Unable to export application 'python2' skeleton on path '/com/canonical/hud/applications/python2': An object is already exported for the interface com.canonical.hud.Application at /com/canonical/hud/applications/python2
  upstart.window-stack-bridge.log: Could not get desktop file for "/org/ayatana/bamf/window/75497480"

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