Depsgraph: Silence obviously noisy relations build errors

Those were happening for drivers which points to invalid drivers, and those
drivers will have their own dedicated error prints.

1 files changed, 10 insertions, 1 deletions

diff --git a/source/blender/depsgraph/intern/builder/deg_builder_relations.cc b/source/blender/depsgraph/intern/builder/deg_builder_relations.cc
index 0d85b1dfc93..914c8ef33db 100644
--- a/source/blender/depsgraph/intern/builder/deg_builder_relations.cc
+++ b/source/blender/depsgraph/intern/builder/deg_builder_relations.cc
@@ -1126,7 +1126,16 @@ void DepsgraphRelationBuilder::build_driver_data(ID *id, FCurve *fcu)
 	}
 	else {
 		RNAPathKey target_key(id, rna_path);
-		add_relation(driver_key, target_key, "Driver -> Target");
+		if (RNA_pointer_is_null(&target_key.ptr)) {
+			/* TODO(sergey): This would only mean that driver is broken.
+			 * so we can't create relation anyway. However, we need to avoid
+			 * adding drivers which are known to be buggy to a dependency
+			 * graph, in order to save computational power.
+			 */
+		}
+		else {
+			add_relation(driver_key, target_key, "Driver -> Target");
+		}
 	}
 }