[issue19829] _pyio.BufferedReader and _pyio.TextIOWrapper destructor don't emit ResourceWarning if the file is not closed

[STINNER Victor]

STINNER Victor added the comment:

> For io.BytesIO, I fixed the code to inherit correctly IOBase finalizer.

Oh, I forgot to include it in my patch. But it's maybe better to have it in a different patch: see attached bytesio_stringio.patch which changes also io.StringIO to inherit the IOBase finalizer.

Emitting a ResourceWarning in io.BytesIO and io.StringIO adds a *lot* of warnings when running the Python test suite. Since these objects only contain memory, no very limited resource like file descriptors, it's probably better to *not* log ResourceWarning for them.

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Added file: http://bugs.python.org/file42292/bytesio_stringio.patch

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