copy animdata and id-props when copying material node tree's to avoid double memory frees or node trees sharing animdata when they shouldnt.

source/blender/blenkernel/BKE_library.h

@@ -42,6 +42,7 @@ struct bContext;
 
 void *alloc_libblock(struct ListBase *lb, short type, const char *name);
 void *copy_libblock(void *rt);
+void copy_libblock_data(struct ID *id, const struct ID *id_from);
 
 void id_lib_extern(struct ID *id);
 void id_us_plus(struct ID *id);

source/blender/blenkernel/intern/library.c

@@ -653,7 +653,17 @@ static void id_copy_animdata(ID *id)
 	}
 }
 
-/* used everywhere in blenkernel and text.c */
+/* material nodes use this since they are not treated as libdata */
+void copy_libblock_data(ID *id, const ID *id_from)
+{
+	if (id_from->properties)
+		id->properties = IDP_CopyProperty(id_from->properties);
+
+	/* the duplicate should get a copy of the animdata */
+	id_copy_animdata(id);
+}
+
+/* used everywhere in blenkernel */
 void *copy_libblock(void *rt)
 {
 	ID *idn, *id;
@@ -679,10 +689,8 @@ void *copy_libblock(void *rt)
 	
 	id->newid= idn;
 	idn->flag |= LIB_NEW;
-	if (id->properties) idn->properties = IDP_CopyProperty(id->properties);
-	
-	/* the duplicate should get a copy of the animdata */
-	id_copy_animdata(idn);
+
+	copy_libblock_data(idn, id);
 	
 	return idn;
 }

source/blender/blenkernel/intern/node.c

@@ -1105,10 +1105,12 @@ bNodeTree *ntreeCopyTree(bNodeTree *ntree, int internal_select)
 		/* is ntree part of library? */
 		for(newtree=G.main->nodetree.first; newtree; newtree= newtree->id.next)
 			if(newtree==ntree) break;
-		if(newtree)
+		if(newtree) {
 			newtree= copy_libblock(ntree);
-		else
+		} else {
 			newtree= MEM_dupallocN(ntree);
+			copy_libblock_data(&newtree->id, &ntree->id); /* copy animdata and ID props */
+		}
 		newtree->nodes.first= newtree->nodes.last= NULL;
 		newtree->links.first= newtree->links.last= NULL;
 	}