commit 6d3d02c69a65abcd64eb6d83baac5675f9208318
author Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com> Wed May 02 03:23:41 2018 -0700
committer GitHub <noreply@github.com> Wed May 02 03:23:41 2018 -0700
tree d70ac3afc6ee81980e17d12db14452d3f7a1cd0a
parent 5818f0896257c51654ce3efce9abad63e12db037

bpo-33391: Fix refleak in set_symmetric_difference (GH-6670)

(cherry picked from commit 491bbedc209fea314a04cb3015da68fb0aa63238)

Co-authored-by: lekma <lekmalek@gmail.com>

Objects/setobject.c

diff --git a/Objects/setobject.c b/Objects/setobject.c
index 154be43..31da3db 100644
--- a/Objects/setobject.c
+++ b/Objects/setobject.c
@@ -1710,8 +1710,10 @@
     if (otherset == NULL)
         return NULL;
     rv = set_symmetric_difference_update(otherset, (PyObject *)so);
-    if (rv == NULL)
+    if (rv == NULL) {
+        Py_DECREF(otherset);
         return NULL;
+    }
     Py_DECREF(rv);
     return (PyObject *)otherset;
 }