From: Juri Linkov <juri@jurta.org>
To: 6083@debbugs.gnu.org
Subject: bug#6083: Regression bug in auto-coding-alist
Date: Mon, 03 May 2010 03:34:00 +0300 [thread overview]
Message-ID: <87k4rlx1qf.fsf@mail.jurta.org> (raw)
I just discovered a regression bug wrt 23.1.
Loading arc-mode fails.
Arc-mode is a mode for the programming language Arc,
not for file archives.
It contains the following code to remove `no-conversion' associated with
the .arc extension from `auto-coding-alist' because there is a file
extension clash between Arc the programming language and file archives:
;; By default, Emacs thinks .arc is an archive extension.
;; This makes it normal.
(dolist (coding auto-coding-alist)
(when (and (string-match "[Aa][Rr][Cc]\\\\|" (car coding))
(or (eq (cdr coding) 'no-conversion)
(eq (cdr coding) 'no-conversion-multibyte)))
(setcar coding (replace-match "" nil nil (car coding)))))
This code fails with
(error "Attempt to modify read-only object")
A similar bug#4917 http://debbugs.gnu.org/4917
for `auto-coding-regexp-alist' was fixed 2009-11-13
by using purecopy only for car or each item,
not the whole list.
To make the code above to not fail, purecopy should be removed
from `auto-coding-alist'.
--
Juri Linkov
http://www.jurta.org/emacs/
next reply other threads:[~2010-05-03 0:34 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-03 0:34 Juri Linkov [this message]
2010-05-03 2:02 ` bug#6083: Regression bug in auto-coding-alist Chong Yidong
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