Re: set -u not working as expected

[Chet Ramey]

On 8/1/20 2:48 PM, Kristof Burek wrote:

> Bash Version: 5.0
> Patch Level: 3
> Release Status: release
> 
> (Machine is a Raspberry Pi running Raspbian "Buster")
> 
> Description:
>         After set -u in a script: when x has not yet been bound to a value, 
>         I would expect the statements x+='x' and x+=('x') to cause Bash to
>         report an error and exit the script.  But it does not.

This does not fall under the `expand an unset parameter' scope where the
`-u' option is active.

-- 
``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/