Re: (( arr[${var@Q}] )) makes the shell crash in bash-5.2

[Chet Ramey]

On 9/30/22 7:15 AM, Koichi Murase wrote:
> 2022年9月30日(金) 19:50 Koichi Murase <myoga.murase@gmail.com>:
> > 2022年9月30日(金) 19:37 Emanuele Torre <torreemanuele6@gmail.com>:
> > > In bash-5.2, using the ${parameter@Q} parameter expansion with an unset
> > > parameter, in an array subscript, in an arithmetic context, causes a
> > > segmentation fault.
> >
> > It seems even ((y[$a])) in arithmetic contexts causes a segfault:
>
> I attach a patch [0001-subst-handle-null-substring.patch].

Thanks for the diagnosis and patch.

Chet

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