ffe94b0d73
When the compositor is destroyed we should cleanup the list of window actors we created and destroy them. Since all the actors are added to the window_group or top_window_group we can just destroy these containers (together with the feedback_group), and simply free the windows list. This is particularly needed under X11 because before we destroy the display, we might do some cleanups as detaching the surface pixmaps and freeing the damages and if this happens at later point (for example when triggered by garbage collector in gnome-shell), we might crash because the x11 dpy reference is already gone. Destroying the window actors instead, ensures we avoid any further call to X11 related functions and that we release the actors XServer resources. Fixes https://gitlab.gnome.org/GNOME/mutter/issues/576 (cherry picked from commit 7718e67f5c0c78ed93e9ad04e7254b6db70a0337)
Mutter
Mutter is a Wayland display server and X11 window manager and compositor library.
When used as a Wayland display server, it runs on top of KMS and libinput. It implements the compositor side of the Wayland core protocol as well as various protocol extensions. It also has functionality related to running X11 applications using Xwayland.
When used on top of Xorg it acts as a X11 window manager and compositing manager.
It contains functionality related to, among other things, window management, window compositing, focus tracking, workspace management, keybindings and monitor configuration.
Internally it uses a fork of Cogl, a hardware acceleration abstraction library used to simplify usage of OpenGL pipelines, as well as a fork af Clutter, a scene graph and user interface toolkit.
Mutter is used by GNOME Shell, the GNOME core user interface. It can also be run standalone, using the command "mutter", but just running plain mutter is only intended for debugging purposes.
License
Mutter is distributed under the terms of the GNU General Public License, version 2 or later. See the COPYING file for detalis.