GNU bug report logs - #23769
25.0.95; Mode Line breakage in vc-git

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Message #98 received at 23769 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Dmitry Gutov <dgutov <at> yandex.ru>
Cc: phillip.lord <at> russet.org.uk, 23769 <at> debbugs.gnu.org,
 npostavs <at> users.sourceforge.net
Subject: Re: bug#23769: 25.0.95; Mode Line breakage in vc-git
Date: Fri, 17 Jun 2016 16:21:16 +0300

> Cc: 23769 <at> debbugs.gnu.org, phillip.lord <at> russet.org.uk
> From: Dmitry Gutov <dgutov <at> yandex.ru>
> Date: Fri, 17 Jun 2016 15:06:10 +0300
> 
> On 06/17/2016 09:54 AM, Eli Zaretskii wrote:
> 
> > (setenv "FOO") works for me.
> 
> setenv works destructively. To use it and remain good citizens, we'd 
> have to `(copy-sequence process-environment)` every time we call a Git 
> command.
> 
> Maybe that's not huge in the grand scheme of things, but it certainly 
> looks wasteful.

If you want to manually remove the variable before adding it with no
value, that will also work.  Otherwise, I see no magic that would do
anything beyond the expected effect on any list.

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