[issue5218] Check for tp_iter in ceval:ext_do_call before overriding exception message

[Antoine Pitrou]

Antoine Pitrou <pitrou at free.fr> added the comment:

You must check tp_iter as well, not only Py_TPFLAGS_HAVE_ITER.
Py_TPFLAGS_HAVE_ITER only tells you that the tp_iter field exists, not
that it's non-NULL.
(see the code for PyObject_GetIter() in Objects/abstract.c for an example)

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nosy: +pitrou

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<http://bugs.python.org/issue5218>
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