Merged revisions 68560 via svnmerge from

svn+ssh://pythondev@svn.python.org/python/trunk

........
  r68560 | amaury.forgeotdarc | 2009-01-13 00:36:55 +0100 (mar., 13 janv. 2009) | 6 lines

  #3720: Interpreter crashes when an evil iterator removes its own next function.

  Now the slot is filled with a function that always raises.

  Will not backport: extensions compiled with 2.6.x would not run on 2.6.0.
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2 files changed, 3 insertions, 1 deletions

diff --git a/Include/abstract.h b/Include/abstract.h
index 4fb16d0..b953308 100644
--- a/Include/abstract.h
+++ b/Include/abstract.h
@@ -612,7 +612,8 @@ xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx*/
 	is an iterator, this returns itself. */
 
 #define PyIter_Check(obj) \
-    ((obj)->ob_type->tp_iternext != NULL)
+    ((obj)->ob_type->tp_iternext != NULL && \
+     (obj)->ob_type->tp_iternext != &_PyObject_NextNotImplemented)
 
      PyAPI_FUNC(PyObject *) PyIter_Next(PyObject *);
      /* Takes an iterator object and calls its tp_iternext slot,
diff --git a/Include/object.h b/Include/object.h
index 0d20ecc..f3fdbda 100644
--- a/Include/object.h
+++ b/Include/object.h
@@ -438,6 +438,7 @@ PyAPI_FUNC(int) PyObject_SetAttr(PyObject *, PyObject *, PyObject *);
 PyAPI_FUNC(int) PyObject_HasAttr(PyObject *, PyObject *);
 PyAPI_FUNC(PyObject **) _PyObject_GetDictPtr(PyObject *);
 PyAPI_FUNC(PyObject *) PyObject_SelfIter(PyObject *);
+PyAPI_FUNC(PyObject *) _PyObject_NextNotImplemented(PyObject *);
 PyAPI_FUNC(PyObject *) PyObject_GenericGetAttr(PyObject *, PyObject *);
 PyAPI_FUNC(int) PyObject_GenericSetAttr(PyObject *,
 					      PyObject *, PyObject *);