compiz crashed with SIGSEGV when a lens is shutting down

Stacktrace:
 #0 0xa5dfdc91 in ?? ()
 No symbol table info available.
 #1 0xb3ac627c in ?? ()
 No symbol table info available.
 Backtrace stopped: previous frame inner to this frame (corrupt stack?)
StacktraceTop:
 ?? ()
 ?? ()

Thank you for your report!

However, processing it in order to get sufficient information for the
developers failed (it does not generate an useful symbolic stack trace). This
might be caused by some outdated packages which were installed on your system
at the time of the report:

outdated debug symbol package for libavahi-common3: package version 0.6.30-4ubuntu1 dbgsym version 0.6.30-0ubuntu2
outdated debug symbol package for libtiff4: package version 3.9.5-1ubuntu1 dbgsym version 3.9.4-5ubuntu6
outdated debug symbol package for dpkg: package version 1.16.0.3ubuntu3 dbgsym version 1.16.0~ubuntu7.1
outdated debug symbol package for libgpg-error0: package version 1.10-0.3ubuntu1 dbgsym version 1.10-0.2ubuntu1
outdated debug symbol package for libk5crypto3: package version 1.9.1+dfsg-1ubuntu1 dbgsym version 1.8.3+dfsg-5ubuntu2.1
outdated debug symbol package for libavahi-client3: package version 0.6.30-4ubuntu1 dbgsym version 0.6.30-0ubuntu2
outdated debug symbol package for passwd: package version 1:4.1.4.2+svn3283-3ubuntu2 dbgsym version 1:4.1.4.2+svn3283-3ubuntu1
outdated debug symbol package for libkrb5-3: package version 1.9.1+dfsg-1ubuntu1 dbgsym version 1.8.3+dfsg-5ubuntu2.1
outdated debug symbol package for libdatrie1: package version 0.2.4-3 dbgsym version 0.2.4-1
outdated debug symbol package for libgssapi-krb5-2: package version 1.9.1+dfsg-1ubuntu1 dbgsym version 1.8.3+dfsg-5ubuntu2.1
outdated debug symbol package for libstartup-notification0: package version 0.12-1 dbgsym version 0.10-1build1
outdated debug symbol package for libkrb5support0: package version 1.9.1+dfsg-1ubuntu1 dbgsym version 1.8.3+dfsg-5ubuntu2.1
outdated debug symbol package for libthai0: package version 0.1.15-2 dbgsym version 0.1.14-2ubuntu1
outdated debug symbol package for libltdl7: package version 2.4-2ubuntu1 dbgsym version 2.2.6b-2ubuntu3

Please upgrade your system to the latest package versions. If you still
encounter the crash, please file a new report.

Thank you for your understanding, and sorry for the inconvenience!

This bug was fixed in the package unity - 4.16.0-0ubuntu1

---------------
unity (4.16.0-0ubuntu1) oneiric; urgency=low

  * New upstream release.
    - compiz crashed with SIGSEGV in nux::GpuDevice::GetGpuInfo()
      (LP: #765375)
    - F10 doesn't start keyboard navigation to the panel (LP: #839628)
    - Change on the at-spi accessibility-toolkit can affect also Unity
      (LP: #844927)
    - compiz crashed with SIGSEGV when a lens is shutting down (LP: #848675)
    - [UIFe] Radiance panel icons are unreadable and ugly when panel goes
      transparent with Dash (LP: #828862)
    - window switcher stuck (not only, but can be triggered with Onboard)
      (LP: #832033)
    - Window titlebar is click through after raising a minimized window
      (LP: #840285)
    - Alt+Shift+` does not work in symmetry with Alt+` (LP: #843250)
    - UIFe: Alt-Tab: Update layout behavior to make previews larger and
      outline active preview (LP: #847944)
    - windows clipped on resize (LP: #848962)
    - Alt-tab - Add orange border to selected window in alt-tab window spread
      (LP: #838114)
    - Launcher - the direction the Launcher is scrolled with the mouse wheel
      is inverted (LP: #839703)
    - Launcher - the rendering of the BFB and Lens squircle does not match the
      design (LP: #838708)
    - Alt-Tab - In the app window spread, all windows should have the same
      height, only the width should vary (LP: #838110)
    - Launcher - the background of the Launcher should be tinted using the
      average colour of the wallpaper (LP: #850068)
    - Alt-tab - It is currently very difficult to see pips in the left of the
      app icon for the currently selected app (LP: #838134)
    - Launcher - Auto scroll missing from the top of the Launcher
      (LP: #838744)
    - Scope searches blocks the lens (LP: #850816)
    - Shortcuts SUPER+1...9 doesn’t work until opening a window (LP: #768076)
    - Dash closes prematurely when dragging apps into the launcher
      (LP: #773892)
    - Dash - As soon as a user starts dragging a .png file from the Dash, the
      file icon turns into a grey question mark (LP: #764447)
    - Dash shows an empty icon for some applications. (LP: #830887)
    - Windows are click through after restore from minimize (LP: #834034)
    - Dash - No keyboard shortcuts for switching lenses (LP: #842086)
    - Dash search for files states "two more results" but doesn't display them
      (LP: #840005)
    - <meta>+<shift>+<launcher #> to start a new instance of a program doesn't
      work anymore (LP: #842977)
    - Alt-tab - Cross interactions between Alt-tab and Dash are broken
      (LP: #844021)
    - UIFe: Dash - Shape and positioning of most of the elements in the Dash
      need adjustment (Part 2) (LP: #844889)
    - Alt-Tab - make pause to spread default alt-tab behaviour. Upgrade
      existing installs as well. (LP: #838075)
    - Do not install unity-preference (LP: #847599)
    - Update unity --distro to latest plugins installed (LP: #847799)
    - off by one error in count of additional results in a category
      (LP: #848218)
    - UIFe - Launcher - The background of the BFB, Workspace Switcher, Lens,
    ...