118676bffb
Since we now remove all theme nodes on a stylesheet change (ie. StTheme's "custom-stylesheets-changed" signal) instead of only invalidating them, those nodes may not be accessed anymore as soon as "custom-stylesheets-changed" is emitted. It turned out though that when comparing them to the newly generated nodes in `st_widget_recompute_style()` using the `st_theme_node_paint/geometry_equal()` functions, the properties of the old nodes will still be accessed, causing a crash since the CRDeclarations are already freed. To fix that, keep the reference to the CRStylesheet, which owns the CRDeclarations used by the theme nodes, around a bit longer, so it's still possible to access the CRDeclarations inside the "custom-stylesheets-changed" signal handler. This allows us to compare the old theme nodes to the new ones since the CSS properties of both are still valid. Fixes https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/2709 (cherry picked from commit e06109c23ce2a6dd53d32c26a89ab46a952d7373)
GNOME Shell
GNOME Shell provides core user interface functions for the GNOME 3 desktop, like switching to windows and launching applications. GNOME Shell takes advantage of the capabilities of modern graphics hardware and introduces innovative user interface concepts to provide a visually attractive and easy to use experience.
For more information about GNOME Shell, including instructions on how to build GNOME Shell from source and how to get involved with the project, see the project wiki.
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