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Date: Tue, 24 Jan 2017 16:32:35 +0000
From: Peter Stephenson <p.stephenson@samsung.com>
To: Zsh Hackers' List <zsh-workers@zsh.org>
Subject: Re: "VAR=foo export VAR" no longer works in zsh emulation
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References: <20170124135037.06081eb1@pwslap01u.europe.root.pri>
 <CGME20170124163239eucas1p1a2fc806430fa49f6e0c9ec83fe42b676@eucas1p1.samsung.com>

On Tue, 24 Jan 2017 13:50:37 +0000
Peter Stephenson <p.stephenson@samsung.com> wrote:
> VAR=foo export VAR
> 
> used to work in zsh the same way as in other Bourne-like shells.
> That syntax the Bourne equivalent of Korn's:
> 
> export VAR=foo
> 
> (without the ambiguity of whether VAR=foo should be treated as
> an assignment or a command argument).

Do you have POSIX_BUILTINS set?  It's needed to get the special
behaviour of not restoring the environment.  I don't think that
behaviour changed recently, though.

% zsh -f
% setopt posixbuiltins
% FOO=bar export FOO
% printenv FOO
bar
%

and

% ARGV0=sh zsh -f
$ FOO=bar export FOO
$ printenv FOO
bar
$

I can believe there could be other weird interactions around, however.

pws