From bdddb11b0efd438696b5fa3e75f323248c22af7d Mon Sep 17 00:00:00 2001
From: Benjamin Peterson <benjamin@python.org>
Date: Mon, 5 Sep 2016 10:39:57 -0700
Subject: clear out f_gen during generator finalization (closes #27812)

Patch from Armin Rigo.
---
 Objects/genobject.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

(limited to 'Objects/genobject.c')

diff --git a/Objects/genobject.c b/Objects/genobject.c
index a9ea5c2478..01c59c24a9 100644
--- a/Objects/genobject.c
+++ b/Objects/genobject.c
@@ -71,7 +71,10 @@ gen_dealloc(PyGenObject *gen)
         return;                     /* resurrected.  :( */
 
     _PyObject_GC_UNTRACK(self);
-    Py_CLEAR(gen->gi_frame);
+    if (gen->gi_frame != NULL) {
+        gen->gi_frame->f_gen = NULL;
+        Py_CLEAR(gen->gi_frame);
+    }
     Py_CLEAR(gen->gi_code);
     Py_CLEAR(gen->gi_name);
     Py_CLEAR(gen->gi_qualname);
-- 
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