Freeing of bones' IDproerties from Armature `free_data` callback would always attempt to do user refcounting, which should never be done from that code. This would generate crashes in depsgraph/COW context e.g.
Freeing of bones' IDproerties from Armature `free_data` callback would always attempt to do user refcounting, which should never be done from that code. This would generate crashes in depsgraph/COW context e.g.