23.0.60; Coding system troubles since two days

[Tassilo Horn <thorn+news@fastmail.fm>]

Please write in English if possible, because the Emacs maintainers
usually do not have translators to read other languages for them.

Your bug report will be posted to the emacs-pretest-bug@gnu.org mailing list.

Please describe exactly what actions triggered the bug
and the precise symptoms of the bug:

Since I updated my emacs CVS checkout on march, 26th in the morning
(EST) I have some very frustrating coding system issues.  They appeared
first when using Gnus (I couldn't read mails of one of my colleagues),
then I got some errors with rcirc (which I cannot reproduce).

First I've thought it was a Gnus related problem, but now I tend more to
say it's something in the coding system handling of emacs.  There are a
few mails/postings of mine with more details, e.g. one of the mails I
cannot open on the ding@gnus.org list / gmane.emacs.gnus.general group.

  http://article.gmane.org/gmane.emacs.gnus.general/66565
  http://article.gmane.org/gmane.emacs.gnus.general/66567
  http://article.gmane.org/gmane.emacs.gnus.general/66568
  http://article.gmane.org/gmane.emacs.gnus.general/66570
  http://article.gmane.org/gmane.emacs.gnus.general/66573

Maybe the following change causes the troubles?

,----
| 2008-03-25  Stefan Monnier  <monnier@iro.umontreal.ca>
| 

[...]

| 	* process.h (struct Lisp_Process): Remove filter_multibyte.
| 	* process.c (QCfilter_multibyte): Remove.
| 	(setup_process_coding_systems): Don't use filter_multibyte.
| 	(Fstart_process, Fmake_network_process): Don't set filter_multibyte.
| 	(read_process_output): Don't adjust multibyteness to filter_multibyte.
| 	(Fset_process_filter_multibyte): Change the coding-system to
| 	approximate the previous behavior.
| 	(Fprocess_filter_multibyte_p): Get the multibyteness straight from the
| 	coding-system.
| 
| 	* coding.c (decode_coding_object): When not decoding into a buffer,
| 	obey the coding system's preference of (uni|multi)byte.
`----

Bye,
Tassilo

If Emacs crashed, and you have the Emacs process in the gdb debugger,
please include the output from the following gdb commands:
    `bt full' and `xbacktrace'.
If you would like to further debug the crash, please read the file
/usr/share/emacs/23.0.60/etc/DEBUG for instructions.


In GNU Emacs 23.0.60.2 (i686-pc-linux-gnu, GTK+ Version 2.12.9)
 of 2008-03-27 on localhost
Windowing system distributor `The X.Org Foundation', version 11.0.10400090
configured using `configure  '--prefix=/usr' '--host=i686-pc-linux-gnu' '--mandir=/usr/share/man' '--infodir=/usr/share/info' '--datadir=/usr/share' '--sysconfdir=/etc' '--localstatedir=/var/lib' '--program-suffix=-emacs-23' '--infodir=/usr/share/info/emacs-23' '--without-carbon' '--with-sound' '--with-x' '--with-toolkit-scroll-bars' '--with-gif' '--with-jpeg' '--with-png' '--with-rsvg' '--with-tiff' '--with-xpm' '--enable-font-backend' '--with-freetype' '--with-xft' '--with-libotf' '--with-m17n-flt' '--with-x-toolkit=gtk' '--without-hesiod' '--with-kerberos' '--with-kerberos5' '--with-gpm' '--with-dbus' '--build=i686-pc-linux-gnu' 'build_alias=i686-pc-linux-gnu' 'host_alias=i686-pc-linux-gnu' 'CFLAGS=-march=i386 -O0 -g' 'LDFLAGS=''

Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: en_US.utf8
  value of $XMODIFIERS: nil
  locale-coding-system: utf-8-unix
  default-enable-multibyte-characters: t

Major mode: Group

Minor modes in effect:
  gnus-topic-mode: t
  gnus-undo-mode: t
  yas/minor-mode: t
  shell-dirtrack-mode: t
  recentf-mode: t
  icomplete-mode: t
  window-number-meta-mode: t
  window-number-mode: t
  savehist-mode: t
  exec-abbrev-cmd-mode: t
  show-paren-mode: t
  delete-selection-mode: t
  which-function-mode: t
  tooltip-mode: t
  mouse-wheel-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  global-auto-composition-mode: t
  auto-composition-mode: t
  auto-compression-mode: t
  column-number-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent input:
. . . <right> <right> <delete> . . . <right> <right> 
<left> <delete> . . . <down> <left> <left> <left> <left> 
<left> <left> <left> <left> <left> <left> <left> <left> 
<left> <left> <left> <left> <right> <right> <right> 
<delete> <delete> <delete> <delete> <delete> <delete> 
. . . . <right> <right> <delete> <right> <right> <right> 
<backspace> . . . <right> <delete> . . . <right> <right> 
<delete> . . . <right> <right> <delete> . . . <right> 
<right> <delete> . . . <right> <delete> . . . <down> 
<down> <down> <down> <down> <down> <down> <down> <down> 
<down> <down> <down> <down> <down> <down> <down> <down> 
<down> <down> <down> <down> <down> <down> <down> <down> 
<down> <down> <down> <down> <down> <down> <down> <down> 
<down> <down> <down> <down> <down> <down> <down> <down> 
<down> <down> <up> <up> <up> <up> SPC SPC N o w SPC 
I SPC r e p l a c e d SPC t h e m SPC m a n u a l l 
y SPC t o SPC g e t SPC t h e SPC m a i l SPC s e n 
t . SPC SPC A n y o n e SPC k n o w s SPC w h a t SPC 
c o u l d SPC c a u s e SPC t h o s e SPC s p o n t 
a n e o s C-c t q <backspace> <backspace> <backspace> 
o u s C-c t q <backspace> <backspace> <backspace> <backspace> 
<backspace> <backspace> t a n C-c t <down> <down> <down> 
<down> <return> C-c t <return> SPC c o d i n g SPC 
s y s t e m SPC t r o u b l e s ? C-c C-c y q <down-mouse-1> 
<mouse-1> <down-mouse-1> <mouse-1> M-x r e b <return> 
<return>

Recent messages:
250 2.1.5 Ok
354 End data with <CR><LF>.<CR><LF>
250 2.0.0 Ok: queued as D18AD439C
221 2.0.0 Bye
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