[Bf-blender-cvs] [ff6e8b0b500] blender2.8: Depsgraph: Avoid assert failure in some harmless cases

[Sergey Sharybin]

Commit: ff6e8b0b500fe839dfdb4dbe7ef75a7c15f6e34d
Author: Sergey Sharybin
Date:   Mon Jul 24 17:41:29 2017 +0200
Branches: blender2.8
https://developer.blender.org/rBff6e8b0b500fe839dfdb4dbe7ef75a7c15f6e34d

Depsgraph: Avoid assert failure in some harmless cases

===================================================================

M	source/blender/depsgraph/intern/depsgraph.cc

===================================================================

diff --git a/source/blender/depsgraph/intern/depsgraph.cc b/source/blender/depsgraph/intern/depsgraph.cc
index 5640a22cf2a..0644b8d6abd 100644
--- a/source/blender/depsgraph/intern/depsgraph.cc
+++ b/source/blender/depsgraph/intern/depsgraph.cc
@@ -449,7 +449,16 @@ ID *Depsgraph::get_cow_id(const ID *id_orig) const
 		 * safer game here.
 		 */
 		if ((id_orig->tag & LIB_TAG_COPY_ON_WRITE) == 0) {
-			BLI_assert(!"Request for non-existing copy-on-write ID");
+			/* TODO(sergey): This is nice sanity check to have, but it fails
+			 * in following situations:
+			 *
+			 * - Material has link to texture, which is not needed by new
+			 *   shading system and hence can be ignored at construction.
+			 * - Object or mesh has material at a slot which is not used (for
+			 *   example, object has material slot by materials are set to
+			 *   object data).
+			 */
+			// BLI_assert(!"Request for non-existing copy-on-write ID");
 		}
 		return (ID *)id_orig;
 	}