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Original rework of caches during undo/redo (see D8183) had a very bad flaw hidden in it: using the key of a ghash as source of data. While this was effectively working then (cache pointer itself being part of the key, and said cache pointers not being cleared on file write), this is a general very bad way to do things. Now that cache pointers are more and more cleared on file write (as part of clearing runtime-data to reduce false-positives when checking if an ID has changed or not), this has to be fixed properly by: * Not storing the cache pointer itself in the IDCacheKey. * In undo context, in readfile code trying to preserve caches, store the cache pointers as values of the mapping, together with the usages counter The first change potentially affects all usages of `BKE_idtype_id_foreach_cache`, but in practice this code is only used by memfile reading code (i.e. undo) currently. Related to T97015. Reviewed By: brecht Maniphest Tasks: T97015 Differential Revision: https://developer.blender.org/D14559
.. Keep this document short & concise, linking to external resources instead of including content in-line. See 'release/text/readme.html' for the end user read-me. Blender ======= Blender is the free and open source 3D creation suite. It supports the entirety of the 3D pipeline-modeling, rigging, animation, simulation, rendering, compositing, motion tracking and video editing. .. figure:: https://code.blender.org/wp-content/uploads/2018/12/springrg.jpg :scale: 50 % :align: center Project Pages ------------- - `Main Website <http://www.blender.org>`__ - `Reference Manual <https://docs.blender.org/manual/en/latest/index.html>`__ - `User Community <https://www.blender.org/community/>`__ Development ----------- - `Build Instructions <https://wiki.blender.org/wiki/Building_Blender>`__ - `Code Review & Bug Tracker <https://developer.blender.org>`__ - `Developer Forum <https://devtalk.blender.org>`__ - `Developer Documentation <https://wiki.blender.org>`__ License ------- Blender as a whole is licensed under the GNU General Public License, Version 3. Individual files may have a different, but compatible license. See `blender.org/about/license <https://www.blender.org/about/license>`__ for details.