GNU bug report logs - #76255
cat: error without arguments

Previous Next

To add a comment to this bug, you must first unarchive it, by sending
a message to control AT debbugs.gnu.org, with unarchive 76255 in the body.
You can then email your comments to 76255 AT debbugs.gnu.org in the normal way.

Toggle the display of automated, internal messages from the tracker.

Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: lilydjwg <lilydjwg <at> gmail.com>
To: bug-coreutils <at> gnu.org
Subject: cat: error without arguments
Date: Thu, 13 Feb 2025 14:45:39 +0800

In the past I can run `cat` without any arguments and it prints
whatever I type at the terminal. However since 9.6, `cat` reports the
following error:

cat: -: input file is output file

-- 
Best regards,
lilydjwg

Message #12 received at 76255-done <at> debbugs.gnu.org (full text, mbox):

From: Paul Eggert <eggert <at> cs.ucla.edu>
To: lilydjwg <lilydjwg <at> gmail.com>
Cc: 76255-done <at> debbugs.gnu.org
Subject: Re: bug#76255: cat: error without arguments
Date: Fri, 14 Feb 2025 22:22:02 -0800

[Message part 1 (text/plain, inline)]

On 2025-02-12 22:45, lilydjwg wrote:
> cat: -: input file is output file

Thanks for the bug report. The symptoms you observe are a bug in 'cat'. 
I also see a bug in Gawk which I reported to the Gawk maintainer 
<https://lists.gnu.org/r/bug-gawk/2025-02/msg00003.html>. I don't see a 
bug in zsh or fish but perhaps I'm missing something.

To fix the 'cat' bug I installed the attached patch into bleeding-edge 
Coreutils on Savannah, and something like this patch should appear in 
the next release.

[0001-cat-fix-plain-cat-bug.patch (text/x-patch, attachment)]

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.