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[Chris Coulson <chris.coulson@xxxxxxxxxxxxx>]

The crash is because XGetWindowAttributes is throwing a BadMatch error,
which is unexpected. It will throw a BadMatch error (from
dixLookupWindow) if the specified window isn't really a window. This
might happen if a window is destroyed and replaced with a drawable of
the same ID whilst gnome-settings-daemon is handling the original
CreateNotify event.

This looks like it's basically the same issue as
https://bugs.freedesktop.org/show_bug.cgi?id=23562, except with
XGetWindowAttributes instead of XGetWindowProperty.

Perhaps XGetWindowAttributes needs a similar fix?

(Subscribing the other Chris for a second opinion)

** Bug watch added: freedesktop.org Bugzilla #23562
   https://bugs.freedesktop.org/show_bug.cgi?id=23562

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https://bugs.launchpad.net/bugs/903973

Title:
  gnome-settings-daemon crashed with signal 5 in _XReply()

Status in “gnome-settings-daemon” package in Ubuntu:
  Confirmed
Status in “gnome-settings-daemon” source package in Precise:
  Confirmed

Bug description:
  The crash happened right after logging in. I launched the onscreen
  keyboard Onboard and the Synaptic Package Manager; but I don't know
  whether it is related to the bug occurring.

  ProblemType: Crash
  DistroRelease: Ubuntu 12.04
  Package: gnome-settings-daemon 3.2.2-0ubuntu5
  ProcVersionSignature: Ubuntu 3.2.0-3.9-generic 3.2.0-rc4
  Uname: Linux 3.2.0-3-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 1.90-0ubuntu1
  Architecture: amd64
  CrashCounter: 1
  Date: Tue Dec 13 23:09:36 2011
  ExecutablePath: /usr/lib/gnome-settings-daemon/gnome-settings-daemon
  InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release amd64 (20091027)
  ProcCmdline: /usr/lib/gnome-settings-daemon/gnome-settings-daemon
  Signal: 5
  SourcePackage: gnome-settings-daemon
  StacktraceTop:
   ?? () from /usr/lib/x86_64-linux-gnu/libX11.so.6
   ?? () from /usr/lib/x86_64-linux-gnu/libX11.so.6
   _XReply () from /usr/lib/x86_64-linux-gnu/libX11.so.6
   _XGetWindowAttributes () from /usr/lib/x86_64-linux-gnu/libX11.so.6
   XGetWindowAttributes () from /usr/lib/x86_64-linux-gnu/libX11.so.6
  Title: gnome-settings-daemon crashed with signal 5 in _XReply()
  UpgradeStatus: Upgraded to precise on 2011-12-09 (4 days ago)
  UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare

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