Fix T41703: Blender crashes trying to load character file.

Core of the issue is that pointcache handling in depsgraph were (re-) tagging
for update some objects on hidden layers, when all their dependencies remained
untag.

Since we do not want to update objects on hidden layers, take this data into account
when flushing pointcache.

Investigations and org patch by self, reviews, advices and final patch by sergey, many thanks! :)

1 files changed, 13 insertions, 7 deletions

diff --git a/source/blender/blenkernel/intern/depsgraph.c b/source/blender/blenkernel/intern/depsgraph.c
index eeda9b0f90f..93bb4849718 100644
--- a/source/blender/blenkernel/intern/depsgraph.c
+++ b/source/blender/blenkernel/intern/depsgraph.c
@@ -1774,7 +1774,8 @@ static unsigned int flush_layer_node(Scene *sce, DagNode *node, int curtime)
 }
 
 /* node was checked to have lasttime != curtime, and is of type ID_OB */
-static void flush_pointcache_reset(Main *bmain, Scene *scene, DagNode *node, int curtime, int reset)
+static void flush_pointcache_reset(Main *bmain, Scene *scene, DagNode *node,
+                                   int curtime, unsigned int lay, bool reset)
 {
 	DagAdjList *itA;
 	Object *ob;
@@ -1788,14 +1789,17 @@ static void flush_pointcache_reset(Main *bmain, Scene *scene, DagNode *node, int
 
 				if (reset || (ob->recalc & OB_RECALC_ALL)) {
 					if (BKE_ptcache_object_reset(scene, ob, PTCACHE_RESET_DEPSGRAPH)) {
-						ob->recalc |= OB_RECALC_DATA;
-						lib_id_recalc_data_tag(bmain, &ob->id);
+						/* Don't tag nodes which are on invisible layer. */
+						if (itA->node->lay & lay) {
+							ob->recalc |= OB_RECALC_DATA;
+							lib_id_recalc_data_tag(bmain, &ob->id);
+						}
 					}
 
-					flush_pointcache_reset(bmain, scene, itA->node, curtime, 1);
+					flush_pointcache_reset(bmain, scene, itA->node, curtime, lay, true);
 				}
 				else
-					flush_pointcache_reset(bmain, scene, itA->node, curtime, 0);
+					flush_pointcache_reset(bmain, scene, itA->node, curtime, lay, false);
 			}
 		}
 	}
@@ -1912,10 +1916,12 @@ void DAG_scene_flush_update(Main *bmain, Scene *sce, unsigned int lay, const sho
 						lib_id_recalc_data_tag(bmain, &ob->id);
 					}
 
-					flush_pointcache_reset(bmain, sce, itA->node, lasttime, 1);
+					flush_pointcache_reset(bmain, sce, itA->node, lasttime,
+					                       lay, true);
 				}
 				else
-					flush_pointcache_reset(bmain, sce, itA->node, lasttime, 0);
+					flush_pointcache_reset(bmain, sce, itA->node, lasttime,
+					                       lay, false);
 			}
 		}
 	}