tcsh regex [] error

[Łukasz Dudek]

on 18.04.4

~/Temp/t> tcsh --version
tcsh 6.20.00 (Astron) 2016-11-24 (x86_64-unknown-linux) options wide,nls,dl,al,kan,sm,rh,nd,color,filec
~/Temp/t> ls
1 2 3 4 5
~/Temp/t> ls [2-3]
2 3
~/Temp/t> ls [1-3]
1 2 3

however on 19.10

~/Temp/t>> tcsh --version
tcsh 6.21.00 (Astron) 2019-05-08 (x86_64-unknown-linux) options wide,nls,dl,al,kan,sm,rh,nd,color,filec
~/Temp/t>> ls
1 2 3 4 5
~/Temp/t>> ls [1-3]
1 2 3
~/Temp/t>> ls [2-3]
1 2 3

which is a problem.

[Łukasz Dudek (ldudek)]

https://mailman.astron.com/pipermail/tcsh/2019-November/000036.html

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Cruncher (ubuntu-wkresse)]

This has been bugged since at least 20.04 LTS, and is STILL bugged in 22.04 LTS.
The affected tcsh versions are 6.21 (and 6.22?), the bug was already fixed 4 years ago in tcsh 6.23: https://github.com/tcsh-org/tcsh/commit/4679bde3e1ceca63d6eb4de5ce41c996405e61aa

Ubuntu 23.04 and upwards already use the fixed version 6.24: https://packages.ubuntu.com/search?keywords=tcsh

=> PLEASE somebody be so kind to push this in 22.04 LTS as well - the bug can break all sorts of things, including security-relevant scripts.

Possible workaround until then: manually install a newer version of tcsh (such as 6.24.10-1) from here: https://packages.ubuntu.com/mantic/tcsh

Thanks!
Cruncher

[Evgeny Stambulchik (fnevgeny)]

I've been hit by this bug badly today in 22.04. I cannot believe it takes 3 years to apply an existing patch. Really, what is the meaning of "LTS"??