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Re: Empty array referenced by indirection reports unbound variable

From: Chet Ramey
Subject: Re: Empty array referenced by indirection reports unbound variable
Date: Sun, 6 Feb 2022 11:31:47 -0500
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:91.0) Gecko/20100101 Thunderbird/91.4.1

On 2/6/22 4:23 AM, konsolebox wrote:
On Thu, Dec 30, 2021 at 4:35 PM Chet Ramey <chet.ramey@case.edu> wrote:
Let's try it. Thanks for the report.

It seems to be already fixed in 5.2-alpha (thanks), but I can't see it
mentioned in the changelog.  Can you kindly confirm if it really is?


"bb. Array references using `@' and `*' that are the value of nameref variables
    (declare -n ref='v[@]' ; echo $ref) no longer cause the shell to exit if
    set -u is enabled and the array (v) is unset."

From the bash change log:

        - parameter_brace_expand: when expanding an indirect variable, extend
          the special case for array[@] and array[*] (set -u/no positional
          parameters, obeying the baroque quoting rules) to the value of the
          indirection. Report and fix from konsolebox <konsolebox@gmail.com>

``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/

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