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From: Andreas Kusalananda =?iso-8859-1?B?S+Ro5HJp?= <andreas.kahari@abc.se>
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Subject: Re: declare -g reports as invalid option on MacOS (10.14.6)  Bash (5.0.11)
Date: Sat, 31 Aug 2019 09:06:35 +0200
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On Fri, Aug 30, 2019 at 06:03:37PM -0600, Ray Sutton wrote:
> Firstly apologies for not using bashbug, I'm having an issue on a
> machine I'm rebuilding and don't have email readily available yet
> 
> The issue is on a late 2013 MBP running MacOS 10.14.6 and 
> bash -version reports 5.0.11(1)-release (x86-64-apple-darwin18.6.0)
> 
> The error is occuring in my .bash_profile and reports as
> 
> -bash: declare: -g: invalid option
> declare usage: declare [-afFirtx] [-p] [name[=value]...]
> 
> Which does not agree with the man page.
> 
> My work MBP (mid 2014) is running exactly the same version of both
> MacOS and bash, the problem doesn't occur there
> 
> In both cases bash was installed via brew.
> 
> The behavior seems consistent with the original bash 3 declare
> statement persisting after the bash 5 install which seems unlikely.
> 
> Any Advice on how to fix this issue?
> 
> Thanks
> 
> Ray Sutton
> 

It seems likely that you are in fact running /bin/bash
(3.2.57(1)-release, from the macOS base system) instead of
/usr/local/bin/bash (5.0.11(1)-release, current bash from Homebrew).

How do you start your bash login shell?