GNU bug report logs - #49217
'shuf' returns nothing if the low range number is higher by 1 than the high number

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Package: coreutils;

Reported by: F8ER F8ER <the.f8er <at> gmail.com>

Date: Fri, 25 Jun 2021 04:14:02 UTC

Severity: normal

Done: Paul Eggert <eggert <at> cs.ucla.edu>

Bug is archived. No further changes may be made.

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

From: F8ER F8ER <the.f8er <at> gmail.com>
To: bug-coreutils <at> gnu.org
Subject: 'shuf' returns nothing if the low range number is higher by 1 than
 the high number
Date: Fri, 25 Jun 2021 01:46:30 +0200

Dear GNU Developers,


Thank you very much for the project.


It seems, if the low range number is higher by 1 than the high number,
the program returns

nothing (with exit code = 0), while 102-100 results in an error and
100-100 returns 100 as expected.

For example, `shuf -i 101-100 -n 1` returns nothing with the exit code
= 0 (unexpected).


Expected (normal):

`shuf -i 100-101 -n 1` returns either 100 or 101 with an exit code = 0.

`shuf -i 100-100 -n 1` returns 100 with an exit code = 0.

`shuf -i 102-100 -n 1` results in an error with an exit code = 1.


Is that an expected behavior?


Stay safe!


Best and kind regards
This bug report was last modified 3 years and 356 days ago.

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