unity crash on alt-tab

Bug Description

bzr2246

In trunk when you press alt-tab Unity crashes. I saw this one on SandyBridge machine. attached stacktrace

This bug was fixed in the package unity - 5.10.0-0ubuntu3

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unity (5.10.0-0ubuntu3) precise-proposed; urgency=low

[ Oliver Grawert ]
* Enable subarch specific quilt support
* add linaros disable_standalone-clients.patch to make unity build with GLES

[ Didier Roche ]
* remove a symlink and replace with a real file for
debian/patches/series.<arch> as not supported in non v3 (and we don't
want v3 format with full source upstream derived branch)

unity (5.10.0-0ubuntu2) precise-proposed; urgency=low

[ Ricardo Salveti de Araujo ]
* Enabling build with OpenGL ES2.0 support for ARM and disable maintainer
mode on that arch to avoid -Werror failure (LP: #980544)

unity (5.10.0-0ubuntu1) precise-proposed; urgency=low

* New upstream release:
- bamfdaemon crashed with SIGABRT in g_assertion_message() (LP: #926208)
- We are using 1 bad hack for compiz hanging on startup (LP: #963264)
- GConf backend steals glib events from compiz (LP: #965220)
- when I closed QupZill brawser it crashed and then and then I sow
worrning that compiz crashed but fire fox and chrome is estle working.
gtk-window-decorator crashed with SIGSEGV in max_window_name_width()
(LP: #948580)
- compiz crashed with SIGSEGV in std::basic_string<...>::basic_string()
from unity::launcher::HudLauncherIcon::HudLauncherIcon()::{lambda} from
unity::UBusManager::OnCallback (LP: #964897)
- unity-panel-service crashed due to heap corruption in g_free() from
service_proxy_name_changed() [libindicator/indicator-service-
manager.c:574] (LP: #969360)
- Opening dash while an application is maximized makes unity completely
useless, have to relogin (LP: #975103)
- unity crash on alt-tab (LP: #975168)
- Top bar - Menus should be condensed to fit panel/overlay of appmenu
(LP: #655184)
- Topbar - window controls for maximised windows in the top bar should
conform to Fitts's law (LP: #839690)
- [FFe, UIFe] Dash - When the Dash is open and there is a maximised app in
the background, the top bar background should not disappear
(LP: #839480)
- Dash - The inner bottom left, bottom right and top right corners of the
desktop dash border are rendered incorrectly (LP: #839476)
- Showdesktoped window contents invisible in window spread (LP: #877778)
- Maximized windows can be accidentally closed from wrong monitor.
(LP: #865701)
- Unity launcher on-screen corruption on resume from suspend with nVidia
proprietary driver (LP: #915265)
- Launcher - Inserting items into launcher makes unnecessary animations on
other monitors (LP: #925021)
- Far left character in panel (and launcher popups) distorted
(LP: #927441)
- Jenkins build failure: SetAcceptKeyNavFocusOnMouseEnter not declared
(LP: #938037)
- super+<unbound key> and sometimes super+<number> keys now cause launch
to wedge with the key hints shown and retains focus instead of selecting
the requested window (LP: #934084)
- three-finger move does not move (Precise) (LP: #940612)
- compiz crashed with SIGSEGV in std::__de...