commit acc8cf2cfa18c445e8c9b324206eb7c5e392bcb7
author Antoine Pitrou <solipsis@pitrou.net> Fri Jul 04 20:24:13 2014 -0400
committer Antoine Pitrou <solipsis@pitrou.net> Fri Jul 04 20:24:13 2014 -0400
tree 0c8300eb1c66c97fcf29404ef008b3d544aeefdb
parent e865128605faf64c63cd216507a0875e4c5a424b

Issue #21897: Fix a crash with the f_locals attribute with closure variables when frame.clear() has been called.

Objects/frameobject.c

diff --git a/Objects/frameobject.c b/Objects/frameobject.c
index 0d62293..55ee563 100644
--- a/Objects/frameobject.c
+++ b/Objects/frameobject.c
@@ -786,7 +786,7 @@
         PyObject *key = PyTuple_GET_ITEM(map, j);
         PyObject *value = values[j];
         assert(PyUnicode_Check(key));
-        if (deref) {
+        if (deref && value != NULL) {
             assert(PyCell_Check(value));
             value = PyCell_GET(value);
         }