GNU bug report logs - #77800
grep-3.12: write-error-msg test failure on fedora rawhide (f43)

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Message #32 received at 77800 <at> debbugs.gnu.org (full text, mbox):

From: Grisha Levit <grishalevit <at> gmail.com>
To: Jim Meyering <jim <at> meyering.net>
Cc: Jaroslav Škarvada <jskarvad <at> redhat.com>,
 Paul Eggert <eggert <at> cs.ucla.edu>, jackson <at> fastmail.fm, 77800 <at> debbugs.gnu.org
Subject: Re: bug#77800: grep-3.12: write-error-msg test failure on fedora
 rawhide (f43)
Date: Tue, 15 Apr 2025 22:26:05 -0400

On Tue, Apr 15, 2025 at 9:54 PM Jim Meyering <jim <at> meyering.net> wrote:
> Whoa. Thanks. It looks like this is a >19-year-old bug in stream-close.c
> Here's a tentative fix -- the ChangeLog entry still lacks details of
> when it was introduced:

-      if (! fclose_fail)
+      if (!fclose_fail && !prev_fail)
         errno = 0;

I wonder if this was intentional? Since close_stdout seems to be mostly used
as an atexit function, errno may well have been set for some unrelated
reason by the time this runs -- but errno will be relevant to this stream
if fclose has just failed.

(That's how I made sense of it anyway, on the assumption that it was not a bug)

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