commit 1c2cb516e49ceb56f76e90645e67e8df4e5df01a
author Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com> Wed Oct 10 22:24:14 2018 -0700
committer GitHub <noreply@github.com> Wed Oct 10 22:24:14 2018 -0700
tree d0fde66d720961d2a99f9f9765ac32fe0af64b5c
parent 8b040e55395b37bdb8fd4ec85a270cfc9ec95307

Fix a possible decref of a borrowed reference in symtable.c. (GH-9786)

(cherry picked from commit fc439d20de32b0ebccca79a96e31f83b85ec4eaf)

Co-authored-by: Zackery Spytz <zspytz@gmail.com>

Python/symtable.c

diff --git a/Python/symtable.c b/Python/symtable.c
index 1c328a9..81eea95 100644
--- a/Python/symtable.c
+++ b/Python/symtable.c
@@ -625,8 +625,10 @@
         return 0;
 
     itr = PyObject_GetIter(free);
-    if (!itr)
-        goto error;
+    if (itr == NULL) {
+        Py_DECREF(v_free);
+        return 0;
+    }
 
     while ((name = PyIter_Next(itr))) {
         v = PyDict_GetItem(symbols, name);