fc7141f582
DEG_add_collision_relations was only adding relationships for objects in the brush collection, however dynamic paint also updates parent objects and armature poses which weren't accounted for. Failing to include these relations meant the evaluating the depsgraph could evaluate a pose object from multiple threads at once - causing a crash. Resolve by sharing logic between DEG_add_collision_relations & BKE_object_modifier_update_subframe so depsgraph relationships match objects the dynamic-paint modifier updates as part of its evaluation. Ref !144844
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