[Bf-blender-cvs] [0f72a8a] master: Fix T38337: Crash when calling to_mesh() on a Curve object after clearing its parent

[Sergey Sharybin]

Commit: 0f72a8a7f0a0f8fff11ee26859c33ab684d6e19b
Author: Sergey Sharybin
Date:   Fri Jan 24 00:16:10 2014 +0600
https://developer.blender.org/rB0f72a8a7f0a0f8fff11ee26859c33ab684d6e19b

Fix T38337: Crash when calling to_mesh() on a Curve object after clearing its parent

This is rather a workaround which only works because curve evaluation is only called
for a temporary object. Not a big deal if we'll skip path creation for such objects.

Still would need to think of general solution.

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

M	source/blender/blenkernel/intern/depsgraph.c

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

diff --git a/source/blender/blenkernel/intern/depsgraph.c b/source/blender/blenkernel/intern/depsgraph.c
index c6cfaaf..0e3a15b 100644
--- a/source/blender/blenkernel/intern/depsgraph.c
+++ b/source/blender/blenkernel/intern/depsgraph.c
@@ -2959,7 +2959,19 @@ const char *DAG_get_node_name(void *node_v)
 
 short DAG_get_eval_flags_for_object(struct Scene *scene, void *object)
 {
-	DagNode *node = dag_find_node(scene->theDag, object);;
+	DagNode *node;
+
+	if (scene->theDag == NULL) {
+		/* Happens when converting objects to mesh from a python script
+		 * after modifying scene graph.
+		 *
+		 * Currently harmless because it's only called for temporary
+		 * objects which are out of the DAG anyway.
+		 */
+		return 0;
+	}
+
+	node = dag_find_node(scene->theDag, object);;
 
 	if (node) {
 		return node->eval_flags;