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From: Greg Wooledge <wooledg@eeg.ccf.org>
Newsgroups: gnu.bash.bug
Subject: Re: delcare -a on a nameref in a function modifies nameref instead of target
Date: Wed, 18 Jul 2018 08:23:03 -0400
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On Tue, Jul 17, 2018 at 05:47:20PM -0400, Grisha Levit wrote:
> At global scope this works as expected:
> 
> $ declare -n ref=var; declare -a ref=(X); declare -p ref var
> declare -n ref="var"
> declare -a var=([0]="X")
> 
> But in a function, we end up with the nameref variable having both the
> `a' and `n' attributes and nothing in the target:
> 
> $ f() { declare -n ref=var; declare ref=(X); declare -p ref var; }; f
> declare -an ref=([0]="X")
> -bash: declare: var: not found

FYI that one is already fixed in 5.0-alpha:

wooledg:~$ declare -n ref=var; declare -a ref=(X); declare -p ref var
declare -n ref="var"
declare -a var=([0]="X")
wooledg:~$ f() { declare -n ref=var; declare ref=(X); declare -p ref var; }; f
declare -an ref=([0]="X")
declare -a var=([0]="X")

Or at least partly fixed. *shrug*