Fix T53054: Parentless bone + IK crashes

2 files changed, 6 insertions, 0 deletions

diff --git a/source/blender/depsgraph/intern/builder/deg_builder_nodes_rig.cc b/source/blender/depsgraph/intern/builder/deg_builder_nodes_rig.cc
index ceb2fd25f94..f99be191529 100644
--- a/source/blender/depsgraph/intern/builder/deg_builder_nodes_rig.cc
+++ b/source/blender/depsgraph/intern/builder/deg_builder_nodes_rig.cc
@@ -79,6 +79,9 @@ void DepsgraphNodeBuilder::build_ik_pose(Scene *scene, Object *ob, bPoseChannel
 
 	/* Find the chain's root. */
 	bPoseChannel *rootchan = BKE_armature_ik_solver_find_root(pchan, data);
+	if (rootchan == NULL) {
+		return;
+	}
 
 	if (has_operation_node(&ob->id, DEG_NODE_TYPE_EVAL_POSE, rootchan->name,
 	                       DEG_OPCODE_POSE_IK_SOLVER))
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 ca548ed33d0..bde3c0fae10 100644
--- a/source/blender/depsgraph/intern/builder/deg_builder_relations_rig.cc
+++ b/source/blender/depsgraph/intern/builder/deg_builder_relations_rig.cc
@@ -83,6 +83,9 @@ void DepsgraphRelationBuilder::build_ik_pose(Object *ob,
 	 * - see notes on direction of rel below...
 	 */
 	bPoseChannel *rootchan = BKE_armature_ik_solver_find_root(pchan, data);
+	if (rootchan == NULL) {
+		return;
+	}
 	OperationKey pchan_local_key(&ob->id, DEG_NODE_TYPE_BONE,
 	                             pchan->name, DEG_OPCODE_BONE_LOCAL);
 	OperationKey init_ik_key(&ob->id, DEG_NODE_TYPE_EVAL_POSE, DEG_OPCODE_POSE_INIT_IK);