[CBRD-24422] When an error occurs in update_class(), it is not initia…

…lized to NULL after classobj_free_template() is executed, so core occurs later. (#3711) (#3854)

http://jira.cubrid.org/browse/CBRD-24422

backport #3711

src/object/schema_manager.c

@@ -12844,6 +12844,13 @@ update_class (SM_TEMPLATE * template_, MOP * classmop, int auto_res, DB_AUTH aut
   assert (error != ER_HEAP_NODATA_NEWADDRESS);	/* TODO - */
 
   classobj_free_template (flat);
+
+  /* don't touch this class if we aborted ! */
+  if (class_ != NULL && error != ER_LK_UNILATERALLY_ABORTED)
+    {
+      class_->new_ = NULL;
+    }
+
   abort_subclasses (newsubs);
 
   if (error != ER_TM_SERVER_DOWN_UNILATERALLY_ABORTED && error != ER_LK_UNILATERALLY_ABORTED)