Amaury Forgeot d'Arc <amaur...@gmail.com> added the comment:

In _PyObject_LengthHint() code, at the line:
    if (ro == NULL && PyErr_Occurred()) {
It seems that PyErr_Occurred() is not useful and is always true when the 
previous PyObject_CallMethodObjArgs() returned NULL.

Otherwise the patch is fine to me.

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nosy: +amaury.forgeotdarc

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<http://bugs.python.org/issue1242657>
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