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[NickTh <1387163@xxxxxxxxxxxxxxxxxx>]

** Attachment removed: "_usr_bin_compiz_willy.1000.crash"
   https://bugs.launchpad.net/ubuntu/+source/unity/+bug/1387163/+attachment/4477778/+files/_usr_bin_compiz.1000.crash

** Attachment added: "compiz_crash_wily.txt"
   https://bugs.launchpad.net/ubuntu/+source/unity/+bug/1387163/+attachment/4477784/+files/compiz-crash.txt

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https://bugs.launchpad.net/bugs/1387163

Title:
  'Show Desktop' on launcher crashes compiz for any Gtk-Headerbar app
  when using any third party Gtk(3.12/3.14) theme (Vivid/Wily)

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

Bug description:
  This is happening for any gtk-3.12 theme which has proper support for
  gtk-headerbar.

  How to reproduce on Utopic:

  1. sudo apt-get install Numix
  2. sudo apt-get install gnome-tweak-tool
  3. change Gtk theme to Numix
  4. Open any app with Gtk-Headerbar (& NOT directly patched by Ubuntu) like gnome-tweak-tool, gnome-system-log
  2. enable show-desktop on unity launcher
  3. Click on show-desktop first time. it will show desktop.
  4. Click on it again, it crashes compiz & sometimes does not recover from it. Users have to fallback to TTY  & force restart lightdm.

  The problem also occurs for any headerbar app from Gnom3 ppa (for
  example gnome-contacts, baobab, gnome-maps).

  Attached crash file from /var/crash/compiz.

  Note: Compiz on other desktop shell/session works relatively well. For
  example in Gnome-Flashback-Compiz session it doesn't happen.

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