From 64e2f9ac86b0f7aade2fe331136beceee975fc91 Mon Sep 17 00:00:00 2001
From: Raymond Hettinger <python@rcn.com>
Date: Tue, 22 Nov 2016 11:50:40 -0800
Subject: [PATCH] Issue #27100:  Fix ref leak

---
 Python/ceval.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Python/ceval.c b/Python/ceval.c
index ebf073a87fb..83296f637fc 100644
--- a/Python/ceval.c
+++ b/Python/ceval.c
@@ -3138,8 +3138,10 @@ _PyEval_EvalFrameDefault(PyFrameObject *f, int throwflag)
             if (enter == NULL)
                 goto error;
             exit = special_lookup(mgr, &PyId___exit__);
-            if (exit == NULL)
+            if (exit == NULL) {
+                Py_DECREF(enter);
                 goto error;
+            }
             SET_TOP(exit);
             Py_DECREF(mgr);
             res = PyObject_CallFunctionObjArgs(enter, NULL);