commit 33b671e72450bf4b5a946ce0dde6b7fe21150108
author Brandt Bucher <brandtbucher@gmail.com> Tue Nov 19 16:59:32 2019 -0800
committer Victor Stinner <vstinner@python.org> Wed Nov 20 01:59:32 2019 +0100
tree 03330a9cdc791d524c202de6f8d19c58f3a2c47a
parent 2e96906da764402b4c8062dbf99171ca506f9e12

bpo-38823: Fix refleak in marshal init error path (GH-17260)

Python/marshal.c

diff --git a/Python/marshal.c b/Python/marshal.c
index cb11c8c..ec6b3da 100644
--- a/Python/marshal.c
+++ b/Python/marshal.c
@@ -1829,6 +1829,9 @@
     PyObject *mod = PyModule_Create(&marshalmodule);
     if (mod == NULL)
         return NULL;
-    PyModule_AddIntConstant(mod, "version", Py_MARSHAL_VERSION);
+    if (PyModule_AddIntConstant(mod, "version", Py_MARSHAL_VERSION) < 0) {
+        Py_DECREF(mod);
+        return NULL;
+    }
     return mod;
 }