[issue7865] io close() swallowing exceptions

[Pascal Chambon]

Pascal Chambon <chambon.pascal at gmail.com> added the comment:

>Probably an oversight. Do you want to add some tests?

That's WIP

> Because it's not an IO error at all. No I/O occurs. You are just using
the file wrongly (or the wrong file), hence the ValueError.

Then when you try to wrap a non-readable stream into a readable buffered stream (like BufferedRWPair), it should raise a value error as well, but currently it's rather:
"""if not reader.readable(): raise IOError('"reader" argument must be readable.')"""

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<http://bugs.python.org/issue7865>
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