[patch, libgfortran] PR31052 Bad IOSTAT values when readings NAMELISTs past EOF
Sat Mar 10 12:50:00 GMT 2007
Jerry DeLisle wrote:
> Steve Kargl wrote:
>> I haven't read the PR nor your patch. But, if
>> someone is trying to rewind /dev/null, he/she
>> is an idiot. If it was me, I'd close the PR
>> with a rather biting comment about stupidity.
> Easy guy, its the existing dev_null.f90 in gfortran.dg thats doing this rewind.
> If you suggest we get rid of the rewind in there, then patching this PR is
> simply delete the call to test_endfile in st_rewind.
I suspect /dev/null there is acting as a proxy for other sources that
also can't be rewound, but can't be easily tested in a testcase.
I've certainly written codes that did rewinds which weren't obviously
necessary from the end-user standpoint, and I could certainly imagine an
unknowing user (or a forgetful user, if the user was me) hooking them up
to some source -- a named pipe, say -- which didn't support rewinding.
I'd be a bit annoyed if GFortran didn't handle that with a reasonable
Thus, if you remove this from dev_null.f90, I'd want to recommend
checking to make sure that you're _only_ breaking /dev/null and not
breaking other non-rewindable sources, and ideally make sure that this
is still tested some other way in the testsuite.
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