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[Rolf Leggewie <1048131@xxxxxxxxxxxxxxxxxx>]

quantal has seen the end of its life and is no longer receiving any
updates. Marking the quantal task for this ticket as "Won't Fix".

** Changed in: unity-greeter (Ubuntu Quantal)
       Status: Triaged => Won't Fix

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https://bugs.launchpad.net/bugs/1048131

Title:
  unity-greeter crashed with SIGSEGV in gdk_window_get_type_hint()

Status in unity-greeter package in Ubuntu:
  Fix Released
Status in unity-greeter source package in Precise:
  Fix Released
Status in unity-greeter source package in Quantal:
  Won't Fix
Status in unity-greeter source package in Saucy:
  Triaged

Bug description:
  [Impact]
  Unity Greeter can crash when X clients create X windows. This results in Ubuntu going to failsafe mode.

  When an X window appears Unity Greeter receives a Map event. Unity
  Greeter attempts to get a GdkWindow object for the window in the
  event. If the window was destroyed before it does this it gets a NULL
  pointer. Unity Greeter did not check for this case.

  [Test Case]
  This is a bug that only occurs if windows rapidly appear and disappear. Can be verified on machines that are exhibiting the problem (perhaps linked to indicators failing to start). Check errors.ubuntu.com shows problem does not occur when fix applied.
  [Errors Bucket]
  https://errors.ubuntu.com/bucket/?id=/usr/sbin/unity-greeter%3A11%3Agdk_window_get_type_hint%3Aunity_greeter_focus_upon_map%3A_unity_greeter_focus_upon_map_gdk_filter_func%3Agdk_event_apply_filters%3Agdk_event_source_translate_event

  [Regression Potential]
  Low, the change just checks for the NULL pointer and ignores the map event.

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