Re: V+=1 doesn't work if V is a reference to an integer array element

[Chet Ramey]

On 1/13/21 12:00 PM, Oğuz wrote:
> See:
>
>      $ declare -ai a=1
>      $ declare -n b=a[0]
>      $ b+=1
>      bash: a[0]1: syntax error in expression (error token is "1")
>
> Reproducible on 5.1.4 too

Interesting. The root cause of this problem has existed since June, 2012,
when I first added namerefs. When I went looking for the reason it seemed
to work in bash-4.4 but not bash-5.0, I discovered it was masked until
March, 2017, so it `worked' in bash-4.3 and bash-4.4, until that dependency 
was fixed.

I agree that it should work -- there doesn't seem to be any reason it
shouldn't -- so I will make it work again in the next devel branch push.


--
``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/