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[Andrea Azzarone <1017402@xxxxxxxxxxxxxxxxxx>]

*** This bug is a duplicate of bug 983268 ***
    https://bugs.launchpad.net/bugs/983268

** This bug has been marked a duplicate of bug 983268
   compiz crashed with SIGSEGV in ends_with_iter_select<__gnu_cxx::__normal_iterator<char const*, std::basic_string<char> >, char const*, boost::algorithm::is_iequal>() from unity::ui::PointerBarrierWrapper::EmitCurrentData()

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https://bugs.launchpad.net/bugs/1017402

Title:
  compiz crashed with SIGSEGV in
  unity::ui::EdgeBarrierController::Impl::OnPointerBarrierEvent()

Status in Unity:
  Confirmed
Status in unity package in Ubuntu:
  Confirmed

Bug description:
  This is what happened before the crash:
  1) I connected another monitor to my laptop's mini-DVI port (which was previously set to span, not mirror).
  2) Unity didn't recognise the monitor, so I opened up display settings.
  3) The monitor was recognised, but then everything got slow temporarily.
  4) In addition, the mouse cursor could move around the second monitor, but got "stuck" when it just entered the laptop's monitor.
  5) I lost all window decorations, and couldn't alt-tab, etc. I was notified of a crash.
  6) I had to switch to tty1 and run $ unity --replace . All was fine then.

  This crash does not happen all the time.

  ProblemType: Crash
  DistroRelease: Ubuntu 12.04
  Package: unity 5.12-0ubuntu1.1
  ProcVersionSignature: Ubuntu 3.2.0-25.40-generic 3.2.18
  Uname: Linux 3.2.0-25-generic x86_64
  ApportVersion: 2.0.1-0ubuntu8
  Architecture: amd64
  Date: Mon Jun 25 19:03:05 2012
  Disassembly: => 0x0:	Cannot access memory at address 0x0
  ExecutablePath: /usr/bin/compiz
  InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
  ProcCmdline: compiz --replace
  SegvAnalysis:
   Segfault happened at: 0x0:	Cannot access memory at address 0x0
   PC (0x00000000) not located in a known VMA region (needed executable region)!
  SegvReason: executing NULL VMA
  Signal: 11
  SourcePackage: unity
  StacktraceTop:
   ?? ()
   unity::ui::EdgeBarrierController::Impl::OnPointerBarrierEvent(unity::ui::PointerBarrierWrapper*, std::shared_ptr<unity::ui::BarrierEvent>) () from /usr/lib/compiz/libunityshell.so
   sigc::internal::slot_call2<sigc::bound_mem_functor2<void, unity::ui::EdgeBarrierController::Impl, unity::ui::PointerBarrierWrapper*, std::shared_ptr<unity::ui::BarrierEvent> >, void, unity::ui::PointerBarrierWrapper*, std::shared_ptr<unity::ui::BarrierEvent> >::call_it(sigc::internal::slot_rep*, unity::ui::PointerBarrierWrapper* const&, std::shared_ptr<unity::ui::BarrierEvent> const&) () from /usr/lib/compiz/libunityshell.so
   unity::ui::PointerBarrierWrapper::EmitCurrentData() () from /usr/lib/compiz/libunityshell.so
   ?? () from /usr/lib/compiz/libunityshell.so
  Title: compiz crashed with SIGSEGV in unity::ui::EdgeBarrierController::Impl::OnPointerBarrierEvent()
  UpgradeStatus: Upgraded to precise on 2012-04-29 (57 days ago)
  UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare

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