[issue8847] crash appending list and namedtuple

[Matthew Barnett]

Matthew Barnett <python at mrabarnett.plus.com> added the comment:

I've just found that:

    [1] + foo()

crashes, but:

    [1].__add__(foo())

gives:

    Traceback (most recent call last):
      File "<pyshell#25>", line 1, in <module>
        [1].__add__(foo())
    TypeError: can only concatenate list (not "foo") to list

(IDLE on Windows XP)

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nosy: +mrabarnett

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<http://bugs.python.org/issue8847>
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