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[Philippe <1284898@xxxxxxxxxxxxxxxxxx>]

I'm affected too, window spread desactivated with Unity tweak tool and
no more crash.

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https://bugs.launchpad.net/bugs/1284898

Title:
  compiz crashed with SIGSEGV in ScaleScreen::getSelectedWindow()

Status in “unity” package in Ubuntu:
  Confirmed

Bug description:
  crashed when pressing super + w and trying to select a window

  ProblemType: Crash
  DistroRelease: Ubuntu 14.04
  Package: unity 7.1.2+14.04.20140220-0ubuntu1
  ProcVersionSignature: Ubuntu 3.13.0-12.32-generic 3.13.4
  Uname: Linux 3.13.0-12-generic x86_64
  ApportVersion: 2.13.2-0ubuntu5
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Tue Feb 25 18:17:20 2014
  ExecutablePath: /usr/bin/compiz
  InstallationDate: Installed on 2014-02-25 (0 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140223)
  ProcCmdline: compiz
  ProcEnviron:
   LANGUAGE=en_US
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SegvAnalysis:
   Segfault happened at: 0x7f1d2b6410c0 <_ZNK11ScaleScreen17getSelectedWindowEv>:	mov    0x48(%rdi),%rax
   PC (0x7f1d2b6410c0) ok
   source "0x48(%rdi)" (0x00000048) not located in a known VMA region (needed readable region)!
   destination "%rax" ok
  SegvReason: reading NULL VMA
  Signal: 11
  SourcePackage: unity
  StacktraceTop:
   ScaleScreen::getSelectedWindow() const () from /usr/lib/compiz/libscale.so
   unity::UnityScreen::handleEvent(_XEvent*) () from /usr/lib/compiz/libunityshell.so
   CompScreen::handleEvent(_XEvent*) () from /usr/lib/libcompiz_core.so.ABI-20140123
   PrivateScaleScreen::handleEvent(_XEvent*) () from /usr/lib/compiz/libscale.so
   CompScreen::handleEvent(_XEvent*) () from /usr/lib/libcompiz_core.so.ABI-20140123
  Title: compiz crashed with SIGSEGV in ScaleScreen::getSelectedWindow()
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

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