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Re: "set -u" and empty arrays


From: Greg Wooledge
Subject: Re: "set -u" and empty arrays
Date: Thu, 9 May 2019 08:29:14 -0400
User-agent: Mutt/1.10.1 (2018-07-13)

On Thu, May 09, 2019 at 01:07:16PM +0200, Ulrich Windl wrote:
> Bash Version: 4.3
> Patch Level: 48
> Release Status: release
> 
> Hi!
> 
> Is this intended with "set -u":
> # set -u
> # declare -a INSTANCES
> # echo ${INSTANCES[*]}
> bash: INSTANCES[*]: unbound variable
> # INSTANCES=()
> # echo ${INSTANCES[*]}
> bash: INSTANCES[*]: unbound variable
> # echo address@hidden
> bash: address@hidden: unbound variable

wooledg:~$ echo "$BASH_VERSION"
5.0.3(1)-release
wooledg:~$ set -u
wooledg:~$ declare -a a
wooledg:~$ echo "${a[*]}"

wooledg:~$ echo "address@hidden"


Looks like the behavior has already been changed.  Your version of bash
is two major releases behind.



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