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From: Grisha Levit <grishalevit@gmail.com>
Newsgroups: gnu.bash.bug
Subject: Re: GNU Bash v.4.4.23-5 built-in function 'set' produces variable outputs
Date: Fri, 19 Oct 2018 16:21:27 -0400
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On Fri, Oct 19, 2018 at 3:51 PM Greg Wooledge <wooledg@eeg.ccf.org> wrote:
> On Fri, Oct 19, 2018 at 09:41:41PM +0200, Ricky Tigg wrote:
> > $ set | grep SSL
> > SSLKEYLOGFILE=/home/user/test
> > _=SSLKEYLOGFILE

I guess it's a bit surprising that $_ is set to just the variable name
and not "the last argument to the previous command", which would be
the full assignment string.