revert-buffer fails on cvs controlled .tex file

["David Rideout" <dprideout@gmail.com>]

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 bug-gnu-emacs@gnu.org mailing list,
and to the gnu.emacs.bug news group.

Please describe exactly what actions triggered the bug
and the precise symptoms of the bug:
-------------------------------------------------------------------------------
First I launch emacs, loading a cvs controlled .tex file 'turtles.tex':

emacs -q -no-site-file turtles.tex

The status bar reads 'CVS:1.35', so emacs recognizes this file as controlled
by cvs.

Then I enter M-x revert-buffer.  I answer 'yes' to the prompt, and get an
error:

coding-system-get: Wrong type argument: arrayp, nil

The file does not revert.
-------------------------------------------------------------------------------
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/22.1/etc/DEBUG for instructions.


In GNU Emacs 22.1.1 (i386-redhat-linux-gnu, GTK+ Version 2.10.14)
 of 2007-11-06 on xenbuilder2.fedora.redhat.com
Windowing system distributor `The X.Org Foundation', version 11.0.10300000
configured using `configure  '--build=i386-redhat-linux-gnu'
'--host=i386-redhat-linux-gnu' '--target=i386-redhat-linux-gnu'
'--program-prefix=' '--prefix=/usr' '--exec-prefix=/usr'
'--bindir=/usr/bin' '--sbindir=/usr/sbin' '--sysconfdir=/etc'
'--datadir=/usr/share' '--includedir=/usr/include' '--libdir=/usr/lib'
'--libexecdir=/usr/libexec' '--localstatedir=/var'
'--sharedstatedir=/usr/com' '--mandir=/usr/share/man'
'--infodir=/usr/share/info' '--with-pop' '--with-sound' '--with-gtk'
'build_alias=i386-redhat-linux-gnu' 'host_alias=i386-redhat-linux-gnu'
'target_alias=i386-redhat-linux-gnu' 'CFLAGS=-DMAIL_USE_LOCKF
-DSYSTEM_PURESIZE_EXTRA=16777216 -O2 -g -pipe -Wall
-Wp,-D_FORTIFY_SOURCE=2 -fexceptions --param=ssp-buffer-size=4 -m32
-march=i386 -mtune=generic -fasynchronous-unwind-tables''

Important settings:
  value of $LC_ALL: C
  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.UTF-8
  locale-coding-system: nil
  default-enable-multibyte-characters: t

Major mode: LaTeX

Minor modes in effect:
  shell-dirtrack-mode: t
  tooltip-mode: t
  tool-bar-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
  unify-8859-on-encoding-mode: t
  utf-translate-cjk-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: identity

Recent input:
<help-echo> <down-mouse-1> <mouse-1> M-x r e c <backspace>
v e <tab> r <tab> t <tab> <return> y e s <return> <help-echo>
<help-echo> <down-mouse-1> <mouse-movement> <mouse-1>
M-x r e v e r t <tab> <return> y e s <return> <help-echo>
<help-echo> <help-echo> <menu-bar> <buffer> "*Messages*"
<down-mouse-1> <mouse-movement> <mouse-movement> <drag-mouse-1>
<help-echo> <menu-bar> <buffer> "turtles.tex" <help-echo>
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo>
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo>
<help-echo> <menu-bar> <help-menu> <report-emacs-b
ug>

Recent messages:
Loading tex-mode...
Loading regexp-opt...done
Loading tex-mode...done
Loading vc-cvs...done
For information about the GNU Project and its goals, type C-h C-p.
Making completion list...
Loading help-mode...done
Making completion list...
coding-system-get: Wrong type argument: arrayp, nil [2 times]
Loading emacsbug...done