GNU bug report logs - #20521
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Message #17 received at 20521 <at> debbugs.gnu.org (full text, mbox):

From: Alan Morgan <Alan.Morgan <at> nextlabs.com>
To: Nick Andryshak <nandryshak <at> gmail.com>
Cc: "20521 <at> debbugs.gnu.org" <20521 <at> debbugs.gnu.org>
Subject: RE: bug#20521: Bug 2051
Date: Fri, 15 May 2015 14:51:25 -0700

I shouldn't have used the term "global". I meant "default". If the variable is buffer-local then setq should set the buffer-local value and *not* the default value.

In this situation is looks like setq is *sometimes* setting the default value of a buffer local variable.

setq-local is the same as calling make-local-variable followed by setq

Alan

-----Original Message-----
From: Nick Andryshak [mailto:nandryshak <at> gmail.com] 
Sent: Friday, May 15, 2015 2:08 PM
To: Alan Morgan
Cc: 20521 <at> debbugs.gnu.org
Subject: Re: bug#20521: Bug 2051

> How on Earth? Perhaps setq is broken.

That's really not something you should say lightly! 

> Perhaps we aren't actually *in* a buffer when setq is called (is that
> possible?) and thus the global value is being set. I don't understand 
> how this is possible and, now that I've uncovered this, I'm not sure 
> what I can do to fix it.

I think you may misunderstand: setq always sets a global variable.
Perhaps you want to use setq-local?

See:

http://www.gnu.org/software/emacs/manual/html_node/elisp/Global-Variables.html

- Nick

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