[issue21897] frame.f_locals causes segfault on Python >=3.4.1

[Antoine Pitrou]

Antoine Pitrou added the comment:

Following patch seems to fix it, but I have to cook a proper test:

diff --git a/Objects/frameobject.c b/Objects/frameobject.c
--- a/Objects/frameobject.c
+++ b/Objects/frameobject.c
@@ -786,7 +786,7 @@ map_to_dict(PyObject *map, Py_ssize_t nm
         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);
         }

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue21897>
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