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The `rna_Scene_ray_cast()` function tried to find the current depsgraph. To this end, it required the scene, the view layer, and bmain. Scene has a cache of per-view-layer depsgraphs, to speed up switching between view layers. This cache does not contain render depsgraphs, and evaluated view layers also don't have a depsgraph here. When a suitable depsgraph cannot be found, a new depsgraph is created. However, this depsgraph is not evaluated, and has an unexpanded scene pointer with a `NULL` `view_layer`. Using this then crashes Blender. Also, there was no way for the code to get the render depsgraph. The solution is to pass the depsgraph to the `ray_cast()` function, instead of the view layer. This avoids the depsgraph lookup, and also works correctly when rendering. Some add-ons also need updating, which I'll do in the `addons` repository soon. Reviewed By: Sergey Differential Revision: https://developer.blender.org/D8475
.. 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 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.