From: Eli Zaretskii <eliz@gnu.org>
To: Stefan Monnier <monnier@iro.umontreal.ca>
Cc: 18141@debbugs.gnu.org, vincent@vinc17.net, yamaoka@jpl.org
Subject: bug#18141: 24.4.50; saving .gz file breaks file coding
Date: Wed, 06 Aug 2014 21:10:39 +0300 [thread overview]
Message-ID: <83tx5po5eo.fsf@gnu.org> (raw)
In-Reply-To: <jwvy4v1jys2.fsf-monnier+emacsbugs@gnu.org>
> From: Stefan Monnier <monnier@iro.umontreal.ca>
> Cc: Glenn Morris <rgm@gnu.org>, 18141@debbugs.gnu.org, Vincent Lefevre <vincent@vinc17.net>, yamaoka@jpl.org
> Date: Wed, 06 Aug 2014 13:48:27 -0400
>
> > - (let ((coding-system-for-write writecoding)
> > - (coding-system-require-warning nil))
> > + (let ((coding-system-for-write
> > + (if filename-is-magic coding-system-for-write writecoding))
> > + (coding-system-require-warning
> > + (if filename-is-magic coding-system-require-warning)))
> > (write-region nil nil
> > buffer-file-name nil t buffer-file-truename)
> > (setq success t))
>
> I can vaguely guess why that avoids the problem
The problem is the binding of coding-system-for-write based on
incorrect interpretation of buffer-file-name. Why that causes the bug
was explained in the text you elided. The code avoids the binding,
and thus fixes its adverse effects.
> but I'm having a hard time seeing why the above is "right".
Do you see why the binding is "wrong"?
> IOW it seems like an ugly workaround which may itself come with
> unintended consequences.
I agree that reverting the original change, which introduced this
binding, is a better solution. Again, the text you elided said
precisely that. I wonder why you didn't comment on that at all.
As for unintended consequences, I don't see how can any come out of
that, since this just restores the code that was working for years.
Of course, if you have a better suggestion that would be safe enough
for the release branch, I'm all ears.
next prev parent reply other threads:[~2014-08-06 18:10 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-29 6:59 bug#18141: 24.4.50; saving .gz file breaks file coding Katsumi Yamaoka
2014-07-30 0:10 ` Glenn Morris
2014-07-30 2:36 ` Katsumi Yamaoka
2014-07-30 13:15 ` Katsumi Yamaoka
2014-08-05 8:34 ` Glenn Morris
2014-08-06 14:36 ` Eli Zaretskii
2014-08-06 16:43 ` Vincent Lefevre
2014-08-06 17:32 ` Eli Zaretskii
2014-08-06 19:08 ` Vincent Lefevre
2014-08-06 19:45 ` Eli Zaretskii
2014-08-07 0:31 ` Vincent Lefevre
2014-08-07 12:20 ` Stefan Monnier
2014-08-07 14:23 ` Vincent Lefevre
2014-08-11 1:06 ` Glenn Morris
2014-08-06 17:48 ` Stefan Monnier
2014-08-06 18:10 ` Eli Zaretskii [this message]
2014-08-07 0:45 ` Stefan Monnier
2014-08-07 15:14 ` Eli Zaretskii
2014-08-07 19:08 ` Stefan Monnier
2014-08-07 19:37 ` Eli Zaretskii
2014-08-07 20:43 ` Stefan Monnier
2014-08-08 5:51 ` Eli Zaretskii
2014-08-06 23:45 ` Glenn Morris
2014-08-07 0:03 ` Glenn Morris
2014-08-07 12:14 ` Stefan Monnier
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