commit 98a9722e4a82b5f7dc0411233bbec892a02c7667
author Serhiy Storchaka <storchaka@gmail.com> Sun Feb 09 13:14:04 2014 +0200
committer Serhiy Storchaka <storchaka@gmail.com> Sun Feb 09 13:14:04 2014 +0200
tree 51179bb7d80e822a18d0ccbb41fde7198f424813
parent 2cfae9b03f706e0d6889dfecc21f87419d926b00

Issue #20437: Fixed 43 potential bugs when deleting objects references.

Modules/_elementtree.c

diff --git a/Modules/_elementtree.c b/Modules/_elementtree.c
index ae07ca3..3e9f9df 100644
--- a/Modules/_elementtree.c
+++ b/Modules/_elementtree.c
@@ -2739,10 +2739,10 @@
     target->events = events;
 
     /* clear out existing events */
-    Py_XDECREF(target->start_event_obj); target->start_event_obj = NULL;
-    Py_XDECREF(target->end_event_obj); target->end_event_obj = NULL;
-    Py_XDECREF(target->start_ns_event_obj); target->start_ns_event_obj = NULL;
-    Py_XDECREF(target->end_ns_event_obj); target->end_ns_event_obj = NULL;
+    Py_CLEAR(target->start_event_obj);
+    Py_CLEAR(target->end_event_obj);
+    Py_CLEAR(target->start_ns_event_obj);
+    Py_CLEAR(target->end_ns_event_obj);
 
     if (event_set == Py_None) {
         /* default is "end" only */