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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From: F8ER F8ER <the.f8er <at> gmail.com>
To: 49217 <at> debbugs.gnu.org
Subject: bug#49217: '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

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