8ebb759046
The calls to `to_geometry_set` in this file can create a temporary Instances struct for collections. That instances component will contain two attributes, which are currently referenced in the attributes map even after the temporary compoment storage goes out of scope. A simple fix is to avoid adding these attributes to the map in the first place. An alternative that would also be more efficient would be to handle each instance reference type explicitly, without converting it to a temporary geometry set. That seems to significantly complicate the code though; for now it doesn't seem worth it. Pull Request: https://projects.blender.org/blender/blender/pulls/140999
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