Re: Comparison problem with case modification expansion in bash-4.3

[Chet Ramey]

On 11/3/15 9:03 AM, Corentin Peuvrel wrote:
> Hi,
> 
> I think I found a bug in bash-4.3 (4.3.42 in fedora 21), that seems to exists 
> for a long time (at least from 4.1.2 in Centos 6).
> 
> I found a fairly simple way to reproduce it : you have to initialize a 
> variable to an empty string, and do a comparaison to it while doing the case 
> modification expansion ${var,,}
> 
> This doesn't work :
> # foo="" ; [[ bar == *"${foo,,}"* ]] && echo ok

Thanks for the report.  There is a stray quoted null character in the
expanded pattern, which needs to be removed.  This will be fixed in
bash-4.4.

Chet

-- 
``The lyf so short, the craft so long to lerne.'' - Chaucer
                 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, ITS, CWRU    chet@case.edu    http://cnswww.cns.cwru.edu/~chet/