compiz crashed with SIGSEGV in CompWindow::id() while opening tcl/tk interface of R

StacktraceTop:
 CompWindow::id (this=0x0) at /build/buildd/compiz-0.9.4git20110322/src/window.cpp:4467
 CompScreen::handleEvent (this=0x956a4b8, event=0xbfcd778c) at /build/buildd/compiz-0.9.4git20110322/src/event.cpp:1292
 PrivateCompositeScreen::handleEvent (this=0x95c16b0, event=0xbfcd778c) at /build/buildd/compiz-0.9.4git20110322/plugins/composite/src/screen.cpp:102
 CompScreen::handleEvent (this=0x956a4b8, event=0xbfcd778c) at /build/buildd/compiz-0.9.4git20110322/src/event.cpp:986
 PrivateGLScreen::handleEvent (this=0x95c4580, event=0xbfcd778c) at /build/buildd/compiz-0.9.4git20110322/plugins/opengl/src/screen.cpp:588

testcase attached to 750224

happened to me on opening of tkcvs, I guess will not update repository of a while :)

I have a very similar behavior trying to run git gui,

This bug was fixed in the package compiz - 1:0.9.4+bzr20110406-0ubuntu1

---------------
compiz (1:0.9.4+bzr20110406-0ubuntu1) natty; urgency=low

  * new upstream bzr tarball:
    - display/size problems with xterm (LP: #748137)
    - fix crashes on tcl/tk applications (LP: #741074, #747439)
    - fix grab on compose keys (LP: #747323)
    - resync stack at regular interval to avoid invisible windows
      (LP: #723014, #743011, #736876, #740465, #684590)
    - fix weird order in alt + tab (LP: #175874)
    - fix crash in gitk (LP: #743011, #741074)
    - avoid compiz detection by fglrx driver (LP: #740298)
    - Wrong window moves (LP: #741656, #743634)
    - Unity Grid is broken for multi-monitor setups (LP: #709221)
    - Feature Freeze Exception: Animation for Grid Plugin Previews (LP: #744104)
    - unity-window-decorator crashed with SIGSEGV in gdk_window_get_events()
      (LP: #725284)
    - fix xterm (LP: #692463)
    - start the decorator on a secondary screen (LP: #730495)
  * debian/patches/090_git_fix_new_invisible_windows.patch,
    debian/patches/100_bump_core.h.patch:
    - upstreamed
  * debian/patches/01_unity_window_decorator.patch
    debian/patches/085_add_grid_plugin.patch:
    - in bzr upstream tarball
 -- Didier Roche <email address hidden> Wed, 06 Apr 2011 19:37:45 +0200

This bug was fixed in the package unity - 3.8.4-0ubuntu1

---------------
unity (3.8.4-0ubuntu1) natty; urgency=low

  * New upstream release.
    - [fglrx] compiz crashed with SIGSEGV in nux::IOpenGLSurface::UnlockRect()
      (LP: #685682)
    - SIGSEGV in g_atomic_int_get (LP: #688803)
    - unity-panel-service crashed with SIGSEGV in bamf_factory_view_for_path()
      (LP: #717684)
    - New window tracking system breaks in the case where windows try to
      restack relative to destroyed windows that were never mapped
      (LP: #723014)
    - Numpad 'Enter' doesn't work on highlighted items in dash, places-files and
      places-apps (LP: #741615)
    - compiz crashed with SIGSEGV in free() (LP: #738864)
    - compiz crashed with SIGSEGV in g_closure_invoke() (LP: #741674)
    - compiz crashed with SIGSEGV in CompWindow::id() (LP: #742028)
    - Windows that reparent away from the root before they are mapped can
      cause other windows to become invisible (and compiz to crash)
      (LP: #743011)
    - compiz crashed with SIGABRT in raise() (LP: #743414)
    - compiz crashed with SIGSEGV in g_object_get_qdata() (LP: #742905)
    - compiz crashed with SIGSEGV in g_closure_invoke() (LP: #748033)
    - compiz crashed with SIGSEGV in CompScreen::dpy() (LP: #751372)
    - compiz crashed with SIGABRT in __kernel_vsyscall() (LP: #744867)
    - unity-window-decorator crashed with SIGSEGV in gdk_window_get_events()
      (LP: #725284)
    - Missing icons in app launcher (LP: #728393)
    - Multiple quick clicks on launcher icon with multiple windows completely
      crashes Unity (LP: #731790)
    - Add a test case for invisible windows regressions (LP: #736876)
    - Re-sync with xquerytree to avoid stacking order issues (LP: #740465)
    - Wrong window moves (LP: #741656)
    - compiz crashed with SIGSEGV in g_cclosure_marshal_VOID__VOID()
      (LP: #742280)
    - panel superposition (LP: #742859)
    - unity-window-decorator doesn't start on secondary X session
      (LP: #730495)
    - Unity Launcher stops autohiding and is not responsive (LP: #744325)
    - dash categories dropdown menu leaves "ghost" on desktop (LP: #746800)
    - new dialogs open close enough of the launcher to make hide (LP: #747302)
    - dnd from the application place to the launcher works only once
      (LP: #747316)
    - compiz crashed with SIGSEGV in CompWindow::id() while opening tcl/tk
      interface of R (LP: #747439)
    - minimize animates window fading to the top left corner (ubuntu symbol)
      (LP: #747765)
    - Spread - Clicking on a app icon to spread the windows must always show
      all the windows, regardless of whether or not some of the windows are
      minimised (LP: #750349)
    - Launcher - Show visual de-coupling of Launcher app icons (LP: #751196)
    - unity-window-decorator crashed with SIGSEGV in event_filter_func()
      (LP: #748317)
    - Pressing Super-W to switch windows also presents Dash (LP: #753453)
    - Don't create windows over the launcher (LP: #688816)
    - Unity Grid is broken for multi-monitor setups (LP: #709221)
    - F10 key does not move focus to indicators when on the desktop.
      (LP: #727548)
    - dynamic ...