GNU bug report logs - #48171
Possible Bug in comm 8.32

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Package: coreutils;

Reported by: Jon Forrest <nobozo <at> gmail.com>

Date: Sun, 2 May 2021 20:45:02 UTC

Severity: normal

Tags: notabug

Done: Pádraig Brady <P <at> draigBrady.com>

Bug is archived. No further changes may be made.

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From: Jon Forrest <nobozo <at> gmail.com>
To: 48171 <at> debbugs.gnu.org
Subject: bug#48171: Possible Bug in comm 8.32
Date: Sun, 2 May 2021 11:54:48 -0700

[Message part 1 (text/plain, inline)]
This is on Fedora 34 server.

$ uname -a
Linux fedora 5.11.16-300.fc34.x86_64 #1 SMP Wed Apr 21 13:18:33 UTC 2021 
x86_64 x86_64 x86_64 GNU/Linux

$ comm --version
comm (GNU coreutils) 8.32

Consider the 2 attached files f1.txt and f2.txt. They're already sorted.

$ comm -12 f1.txt f2.txt
1O55
1O56

This means that 1055 and 1056 are in both files. However, this isn't
true.

$ fgrep 1055 f1.txt f2.txt
f1.txt:1055
$ fgrep 1056 f1.txt f2.txt
f1.txt:1056

Note that these lines are only in f1.txt. This looks like
a bug.

Please advise.

Cordially,
Jon Forrest

[f1.txt (text/plain, attachment)]
[f2.txt (text/plain, attachment)]
This bug report was last modified 4 years and 16 days ago.

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