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

[Georg Brandl]

Georg Brandl <georg at python.org> added the comment:

Is this ready to commit?

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assignee:  -> pitrou
nosy: +georg.brandl

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue5218>
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