New AIX regressions

[David Edelsohn]

>>>>> Benjamin Kosnik writes:

Ben> How about just this
> 2002-04-29  Benjamin Kosnik  <bkoz@redhat.com>
> 
>	PR libstdc++/5820
>	* include/bits/fstream.tcc
>	(basic_filebuf::_M_underflow_common): Check for eof.
>	* include/bits/streambuf_iterator.h: Match stream_iterator.h.
>	(istreambuf_iterator::operator++): Invalidate on eof.
>	(istreambuf_iterator::operator++(int)): Same.
>	(istreambuf_iterator::operator*): Same.

	With just that one change, the testcases fail.  I think we have a
culprit.

David