Fix T56673: Tara.blend from Blender cloud crashes on load

The issue was caused by dependency cycle solver killing relation
which was guaranteed various things: i.e. copy-on-write component
orders and pose evaluation order (which must first run pose init
function).

Now it is possible to prevent such relations from being ignored.

This is not a complete fix, but is enough to make this specific
rig to work. Ideally, we also need to run copy-on-write operation
prior to anything else.

1 files changed, 4 insertions, 1 deletions

diff --git a/source/blender/depsgraph/intern/builder/deg_builder_relations_rig.cc b/source/blender/depsgraph/intern/builder/deg_builder_relations_rig.cc
index 331b476be2c..d9f07955123 100644
--- a/source/blender/depsgraph/intern/builder/deg_builder_relations_rig.cc
+++ b/source/blender/depsgraph/intern/builder/deg_builder_relations_rig.cc
@@ -385,6 +385,7 @@ void DepsgraphRelationBuilder::build_rig(Object *object)
 	}
 	/* Links between operations for each bone. */
 	LISTBASE_FOREACH (bPoseChannel *, pchan, &object->pose->chanbase) {
+		DepsRelation *relation;
 		OperationKey bone_local_key(&object->id,
 		                            DEG_NODE_TYPE_BONE,
 		                            pchan->name,
@@ -403,7 +404,9 @@ void DepsgraphRelationBuilder::build_rig(Object *object)
 		                           DEG_OPCODE_BONE_DONE);
 		pchan->flag &= ~POSE_DONE;
 		/* Pose init to bone local. */
-		add_relation(pose_init_key, bone_local_key, "Pose Init - Bone Local");
+		relation = add_relation(
+		        pose_init_key, bone_local_key, "Pose Init - Bone Local");
+		relation->flag |= DEPSREL_FLAG_GODMODE;
 		/* Local to pose parenting operation. */
 		add_relation(bone_local_key, bone_pose_key, "Bone Local - Bone Pose");
 		/* Parent relation. */