GNU bug report logs - #15372
eshell gives environment variables high precedence

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Message #3 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Glenn Morris <rgm <at> gnu.org>
To: submit <at> debbugs.gnu.org
Subject: eshell gives environment variables high precedence
Date: Fri, 13 Sep 2013 13:40:30 -0400

Package: emacs
Version: 24.3

I don't use eshell, so maybe this is how it is supposed to work, but
from the point of view of normal shells, this seems wrong:

foo=FOOBAR emacs -Q -f eshell
eshell> for foo in 5 { echo $foo }
        -> FOOBAR

Cf:

bash> export foo=FOOBAR
bash> for foo in 5; do echo $foo; done
      -> 5

Message #6 received at 15372 <at> debbugs.gnu.org (full text, mbox):

From: Stefan Monnier <monnier <at> iro.umontreal.ca>
To: Glenn Morris <rgm <at> gnu.org>
Cc: 15372 <at> debbugs.gnu.org
Subject: Re: bug#15372: eshell gives environment variables high precedence
Date: Fri, 13 Sep 2013 15:05:17 -0400

> I don't use eshell, so maybe this is how it is supposed to work, but
> from the point of view of normal shells, this seems wrong:
> foo=FOOBAR emacs -Q -f eshell
> eshell> for foo in 5 { echo $foo }
> -> FOOBAR

Sorry, I saw this email too late.  Yes, indeed, this should be a bug.


        Stefan

Message #9 received at 15372 <at> debbugs.gnu.org (full text, mbox):

From: Glenn Morris <rgm <at> gnu.org>
To: Stefan Monnier <monnier <at> iro.umontreal.ca>
Cc: 15372 <at> debbugs.gnu.org
Subject: Re: bug#15372: eshell gives environment variables high precedence
Date: Fri, 13 Sep 2013 15:11:50 -0400

Stefan Monnier wrote:

> Sorry, I saw this email too late.  Yes, indeed, this should be a bug.

It's like that since at least 22.1; ie this is not related to your changes.

Message #12 received at 15372 <at> debbugs.gnu.org (full text, mbox):

From: Glenn Morris <rgm <at> gnu.org>
To: 15372 <at> debbugs.gnu.org
Subject: Re: bug#15372: eshell gives environment variables high precedence
Date: Sat, 14 Sep 2013 19:43:40 -0400

If you set eshell-prefer-lisp-variables non-nil, it works.

Message #17 received at 15372 <at> debbugs.gnu.org (full text, mbox):

From: Glenn Morris <rgm <at> gnu.org>
To: Aidan Gauland <aidalgol <at> no8wireless.co.nz>
Cc: 15372 <at> debbugs.gnu.org
Subject: Re: bug#15372: eshell gives environment variables high precedence
Date: Fri, 20 Sep 2013 14:53:28 -0400

Please don't post to bug-gnu-emacs via the newsgroup (it bypasses the
bug tracker).

Aidan Gauland wrote:

> Glenn Morris <rgm <at> gnu.org> writes:
>
>> If you set eshell-prefer-lisp-variables non-nil, it works.
>
> I will add a mention of this in the manual, since users should not have
> to hunt that variable down as you did.

Actually I believe I fixed the issue. But that variable can be mentioned
anyway, just not in this context.

Message #20 received at 15372 <at> debbugs.gnu.org (full text, mbox):

From: Aidan Gauland <aidalgol <at> no8wireless.co.nz>
To: Glenn Morris <rgm <at> gnu.org>
Cc: 15372 <at> debbugs.gnu.org
Subject: Re: bug#15372: eshell gives environment variables high precedence
Date: Sat, 21 Sep 2013 12:41:43 +1200

Glenn Morris <rgm <at> gnu.org> writes:

> Aidan Gauland wrote:
>
>> Glenn Morris <rgm <at> gnu.org> writes:
>>
>>> If you set eshell-prefer-lisp-variables non-nil, it works.
>>
>> I will add a mention of this in the manual, since users should not have
>> to hunt that variable down as you did.
>
> Actually I believe I fixed the issue. But that variable can be mentioned
> anyway, just not in this context.

So, to clarify, what behaviour did you change/fix?

Message #23 received at 15372 <at> debbugs.gnu.org (full text, mbox):

From: Glenn Morris <rgm <at> gnu.org>
To: Aidan Gauland <aidalgol <at> no8wireless.co.nz>
Cc: 15372 <at> debbugs.gnu.org
Subject: Re: bug#15372: eshell gives environment variables high precedence
Date: Fri, 20 Sep 2013 20:47:44 -0400

Aidan Gauland wrote:

> So, to clarify, what behaviour did you change/fix?

foo=FOOBAR emacs -Q -f eshell
eshell>
echo $foo                    # -> FOOBAR
for foo in 5 { echo $foo }   # -> 5   [was FOOBAR, a bug]
echo $foo                    # -> FOOBAR

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