bpo-38138: Fix memory leak introduced by interned strings (GH-16053)

DinoV · miss-islington · commit 8d88e8c662a8 · 2019-09-12T07:38:13.000-07:00
Interned string needs to be decref'd https://bugs.python.org/issue38138 Automerge-Triggered-By: @matrixise
diff --git a/Python/ast.c b/Python/ast.c
@@ -630,6 +630,7 @@ new_identifier(const char *n, struct compiling *c)
         PyObject *args[2] = {form, id};
         id2 = _PyObject_FastCall(c->c_normalize, args, 2);
         Py_DECREF(id);
+        Py_DECREF(form);
         if (!id2)
             return NULL;
         if (!PyUnicode_Check(id2)) {
