bug#8928: 24.0.50; can't open member of tar file in gnus *Article*

[Tom Tromey]

I got an email message with a .tar.gz attachment.
Gnus now opens this in-place in the *Article* buffer -- very cool!
However, I can't seem to open the file contained in the tar.
Middle-clicking on the file name (per the tooltip), or using RET there,
just gives:

widget-button-press: Buffer is read-only: #<buffer *Article nnml:mail.other*>


In GNU Emacs 24.0.50.1 (x86_64-unknown-linux-gnu, GTK+ Version 2.24.4)
 of 2011-06-23 on barimba
Windowing system distributor `Fedora Project', version 11.0.11002000
configured using `configure  
'--prefix=/home/tromey/Space/EmacsBzr/emacs-mt/install''

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.UTF-8
  value of $XMODIFIERS: @im=none
  locale-coding-system: utf-8-unix
  default enable-multibyte-characters: t

Major mode: ERC

Minor modes in effect:
  diff-auto-refine-mode: t
  erc-list-mode: t
  erc-menu-mode: t
  erc-autojoin-mode: t
  erc-ring-mode: t
  erc-pcomplete-mode: t
  erc-track-mode: t
  erc-track-minor-mode: t
  erc-match-mode: t
  erc-button-mode: t
  erc-fill-mode: t
  erc-stamp-mode: t
  erc-netsplit-mode: t
  erc-spelling-mode: t
  erc-truncate-mode: t
  flyspell-mode: t
  erc-status-mode: t
  erc-services-mode: t
  erc-networks-mode: t
  erc-irccontrols-mode: t
  erc-noncommands-mode: t
  erc-move-to-prompt-mode: t
  erc-readonly-mode: t
  tooltip-mode: t
  mouse-wheel-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent input:
<return> C-s c r 0 C-s C-s C-s C-s C-s C-s C-s C-s 
C-a C-s c r 4 C-s M-x l g r e p <return> C R 0 <return> 
<return> <return> C-x o C-x 1 M-x l g r e p <return> 
C R 4 <return> <return> <return> <f9> <switch-frame> 
<switch-frame> <switch-frame> <switch-frame> <switch-frame> 
<switch-frame> <switch-frame> <switch-frame> <switch-frame> 
<switch-frame> <switch-frame> <switch-frame> <switch-frame> 
<switch-frame> <switch-frame> <switch-frame> <switch-frame> 
<switch-frame> C-x 1 C-x b * s c r <tab> <return> ( 
s e t q SPC c o m p i l a t i o n - f i n i s h - f 
u n c i t o n SPC n C-u C-b C-b C-t C-e i l ) C-j C-c 
b M-x r g r e p <return> C <backspace> <return> * <backspace> 
a l l <return> <return> C-x o C-x 1 C-s a l l C-a C-v 
C-l C-p C-p C-p C-c C-c <f9> C-x o C-x 1 C-z n R <return> 
C-p C-SPC C-n C-n C-w C-u C-n C-n C-n C-p C-o I SPC 
d C-x k <return> y e s <return> M S-SPC E S-SPC 2 K 
i 2 K i 2 K i C-x o C-n C-n f C-x k <return> C-h c 
<return> <return> C-f C-f C-h C-g <help-echo> C-e C-b 
C-b <return> C-h c <return> <down-mouse-1> <mouse-1> 
<help-echo> <C-return> <down-mouse-2> <mouse-2> <help-echo> 
<down-mouse-2> <mouse-2> C-x b c l i <tab> C-g C-g 
C-x 1 C-c b C-z n <f10> <f10> C-z o C-c b C-z n C-u 
C-u C-p C-l M-> M-> <switch-frame> <switch-frame> C-z 
n <backspace> E C-p SPC > M S-SPC C-p C-p SPC 2 K i 
<help-echo> <down-mouse-2> <mouse-2> <help-echo> <down-mouse-3> 
<mouse-3> <help-echo> C-g C-z o M-x r e p o r t - e 
m <tab> <return>

Recent messages:
widget-button-press: Buffer is read-only: #<buffer *Article nnml:mail.other*> 
[2 times]
RET runs the command widget-button-press
call-interactively: Buffer is read-only: #<buffer *Article nnml:mail.other*> [2 
times]
Quit [2 times]
Mark set [2 times]
uncompressing cli-cmds.c.tar.gz...done
uncompressing cli-cmds.c.tar.gz...done
Parsing tar file...done
call-interactively: Buffer is read-only: #<buffer *Summary nnml:mail.other*>
QuitError during redisplay: (quit)

Load-path shadows:
/home/tromey/lib/lisp/rpm-spec-mode hides 
/home/tromey/Space/EmacsBzr/emacs-mt/install/share/emacs/site-lisp/rpm-spec-mode
/home/tromey/Space/EmacsBzr/emacs-mt/install/share/emacs/site-lisp/flim/md4 
hides /home/tromey/Space/EmacsBzr/emacs-mt/install/share/emacs/24.0.50/lisp/md4
/home/tromey/Space/EmacsBzr/emacs-mt/install/share/emacs/site-lisp/flim/hex-util
 hides 
/home/tromey/Space/EmacsBzr/emacs-mt/install/share/emacs/24.0.50/lisp/hex-util
/home/tromey/.emacs.d/elpa/css-mode-1.0/css-mode hides 
/home/tromey/Space/EmacsBzr/emacs-mt/install/share/emacs/24.0.50/lisp/textmodes/css-mode
/home/tromey/.emacs.d/elpa/ruby-mode-1.0/ruby-mode hides 
/home/tromey/Space/EmacsBzr/emacs-mt/install/share/emacs/24.0.50/lisp/progmodes/ruby-mode
/home/tromey/.emacs.d/elpa/nxml-mode-20041004/nxml-uchnm hides 
/home/tromey/Space/EmacsBzr/emacs-mt/install/share/emacs/24.0.50/lisp/nxml/nxml-uchnm
/home/tromey/.emacs.d/elpa/nxml-mode-20041004/nxml-rap hides 
/home/tromey/Space/EmacsBzr/emacs-mt/install/share/emacs/24.0.50/lisp/nxml/nxml-rap
/home/tromey/.emacs.d/elpa/nxml-mode-20041004/rng-uri hides 
/home/tromey/Space/EmacsBzr/emacs-mt/install/share/emacs/24.0.50/lisp/nxml/rng-uri
/home/tromey/.emacs.d/elpa/nxml-mode-20041004/rng-parse hides 
/home/tromey/Space/EmacsBzr/emacs-mt/install/share/emacs/24.0.50/lisp/nxml/rng-parse
/home/tromey/.emacs.d/elpa/nxml-mode-20041004/nxml-ns hides 
/home/tromey/Space/EmacsBzr/emacs-mt/install/share/emacs/24.0.50/lisp/nxml/nxml-ns
/home/tromey/.emacs.d/elpa/nxml-mode-20041004/nxml-enc hides 
/home/tromey/Space/EmacsBzr/emacs-mt/install/share/emacs/24.0.50/lisp/nxml/nxml-enc
/home/tromey/.emacs.d/elpa/nxml-mode-20041004/xmltok hides 
/home/tromey/Space/EmacsBzr/emacs-mt/install/share/emacs/24.0.50/lisp/nxml/xmltok
/home/tromey/.emacs.d/elpa/nxml-mode-20041004/rng-nxml hides 
/home/tromey/Space/EmacsBzr/emacs-mt/install/share/emacs/24.0.50/lisp/nxml/rng-nxml
/home/tromey/.emacs.d/elpa/nxml-mode-20041004/rng-maint hides 
/home/tromey/Space/EmacsBzr/emacs-mt/install/share/emacs/24.0.50/lisp/nxml/rng-maint
/home/tromey/.emacs.d/elpa/nxml-mode-20041004/rng-pttrn hides 
/home/tromey/Space/EmacsBzr/emacs-mt/install/share/emacs/24.0.50/lisp/nxml/rng-pttrn
/home/tromey/.emacs.d/elpa/nxml-mode-20041004/rng-match hides 
/home/tromey/Space/EmacsBzr/emacs-mt/install/share/emacs/24.0.50/lisp/nxml/rng-match
/home/tromey/.emacs.d/elpa/nxml-mode-20041004/rng-xsd hides 
/home/tromey/Space/EmacsBzr/emacs-mt/install/share/emacs/24.0.50/lisp/nxml/rng-xsd
/home/tromey/.emacs.d/elpa/nxml-mode-20041004/nxml-util hides 
/home/tromey/Space/EmacsBzr/emacs-mt/install/share/emacs/24.0.50/lisp/nxml/nxml-util
/home/tromey/.emacs.d/elpa/nxml-mode-20041004/rng-loc hides 
/home/tromey/Space/EmacsBzr/emacs-mt/install/share/emacs/24.0.50/lisp/nxml/rng-loc
/home/tromey/.emacs.d/elpa/nxml-mode-20041004/nxml-glyph hides 
/home/tromey/Space/EmacsBzr/emacs-mt/install/share/emacs/24.0.50/lisp/nxml/nxml-glyph
/home/tromey/.emacs.d/elpa/nxml-mode-20041004/nxml-mode hides 
/home/tromey/Space/EmacsBzr/emacs-mt/install/share/emacs/24.0.50/lisp/nxml/nxml-mode
/home/tromey/.emacs.d/elpa/nxml-mode-20041004/nxml-outln hides 
/home/tromey/Space/EmacsBzr/emacs-mt/install/share/emacs/24.0.50/lisp/nxml/nxml-outln
/home/tromey/.emacs.d/elpa/nxml-mode-20041004/rng-dt hides 
/home/tromey/Space/EmacsBzr/emacs-mt/install/share/emacs/24.0.50/lisp/nxml/rng-dt
/home/tromey/.emacs.d/elpa/nxml-mode-20041004/rng-cmpct hides 
/home/tromey/Space/EmacsBzr/emacs-mt/install/share/emacs/24.0.50/lisp/nxml/rng-cmpct
/home/tromey/.emacs.d/elpa/nxml-mode-20041004/rng-valid hides 
/home/tromey/Space/EmacsBzr/emacs-mt/install/share/emacs/24.0.50/lisp/nxml/rng-valid
/home/tromey/.emacs.d/elpa/nxml-mode-20041004/xsd-regexp hides 
/home/tromey/Space/EmacsBzr/emacs-mt/install/share/emacs/24.0.50/lisp/nxml/xsd-regexp
/home/tromey/.emacs.d/elpa/nxml-mode-20041004/nxml-maint hides 
/home/tromey/Space/EmacsBzr/emacs-mt/install/share/emacs/24.0.50/lisp/nxml/nxml-maint
/home/tromey/.emacs.d/elpa/nxml-mode-20041004/nxml-parse hides 
/home/tromey/Space/EmacsBzr/emacs-mt/install/share/emacs/24.0.50/lisp/nxml/nxml-parse
/home/tromey/.emacs.d/elpa/nxml-mode-20041004/rng-util hides 
/home/tromey/Space/EmacsBzr/emacs-mt/install/share/emacs/24.0.50/lisp/nxml/rng-util
/home/tromey/Space/EmacsBzr/emacs-mt/install/share/emacs/site-lisp/flim/sasl-digest
 hides 
/home/tromey/Space/EmacsBzr/emacs-mt/install/share/emacs/24.0.50/lisp/net/sasl-digest
/home/tromey/Space/EmacsBzr/emacs-mt/install/share/emacs/site-lisp/flim/sasl-ntlm
 hides 
/home/tromey/Space/EmacsBzr/emacs-mt/install/share/emacs/24.0.50/lisp/net/sasl-ntlm
/home/tromey/Space/EmacsBzr/emacs-mt/install/share/emacs/site-lisp/flim/sasl 
hides 
/home/tromey/Space/EmacsBzr/emacs-mt/install/share/emacs/24.0.50/lisp/net/sasl
/home/tromey/Space/EmacsBzr/emacs-mt/install/share/emacs/site-lisp/flim/ntlm 
hides 
/home/tromey/Space/EmacsBzr/emacs-mt/install/share/emacs/24.0.50/lisp/net/ntlm
/home/tromey/Space/EmacsBzr/emacs-mt/install/share/emacs/site-lisp/flim/hmac-def
 hides 
/home/tromey/Space/EmacsBzr/emacs-mt/install/share/emacs/24.0.50/lisp/net/hmac-def
/home/tromey/Space/EmacsBzr/emacs-mt/install/share/emacs/site-lisp/flim/sasl-cram
 hides 
/home/tromey/Space/EmacsBzr/emacs-mt/install/share/emacs/24.0.50/lisp/net/sasl-cram
/home/tromey/Space/EmacsBzr/emacs-mt/install/share/emacs/site-lisp/flim/hmac-md5
 hides 
/home/tromey/Space/EmacsBzr/emacs-mt/install/share/emacs/24.0.50/lisp/net/hmac-md5
/home/tromey/.emacs.d/elpa/emms-3.0/tq hides 
/home/tromey/Space/EmacsBzr/emacs-mt/install/share/emacs/24.0.50/lisp/emacs-lisp/tq

Features:
(shadow emacsbug tar-mode find-dired cal-move grep compile org-wl
org-w3m org-vm org-rmail org-mhe org-mew org-irc org-jsinfo org-infojs
org-html org-exp ob-exp org-exp-blocks org-agenda org-info org-gnus
org-docview org-bibtex org-bbdb org ob-emacs-lisp ob-tangle ob-ref
ob-lob ob-table org-footnote org-src ob-comint ob-keys ob ob-eval
org-complete org-list org-faces org-compat org-entities org-macs
noutline outline vc-git etags dabbrev bbdb-hooks thai-util thai-word
diff-mode mailalias smtpmail newcomment bbdb-sc supercite regi mail-hist
shr-color color shr copyright cc-mode cc-fonts cc-menus cc-cmds
cc-styles cc-align cc-engine cc-vars cc-defs vc-bzr help-mode view
jka-compr gnus-fun multi-isearch flow-fill qp gnus-html browse-url
url-cache mm-url bbdb-gui mule-util smiley ansi-color gnus-cite
gnus-async gnus-bcklg gnus-ml nndraft nnmh parse-time rot13 disp-table
netrc nnml nnfolder bbdb-gnus bbdb-snarf mail-extr bbdb-com warnings
nnnil gnus-agent gnus-srvr gnus-score score-mode nnvirtual gnus-msg
gnus-art mm-uu mml2015 epg-config mm-view mml-smime smime dig nntp
gnus-cache nnir gnus-sum nnoo gnus-group gnus-undo nnmail mail-source
gnus-start gnus-spec gnus-int gnus-range message idna sendmail rfc822
mml mml-sec mm-decode mm-bodies mm-encode mail-parse rfc2231 rfc2047
rfc2045 ietf-drums mailabbrev gmm-utils mailheader gnus-win gnus
gnus-ems nnheader mail-utils network-stream starttls tls erc-menu
erc-join erc-ring erc-pcomplete pcomplete erc-track erc-match erc-button
wid-edit erc-fill erc-stamp erc-netsplit erc-spelling erc-truncate
flyspell ispell eldoc emms-status emms-lastfm emms-browser sort
emms-playlist-sort emms-score emms-player-xine emms-player-mpd emms-url
url url-proxy url-privacy url-expand url-methods url-history url-cookie
url-util url-parse auth-source eieio byte-opt bytecomp byte-compile
cconv macroexp assoc gnus-util password-cache url-vars mm-util
mail-prsvr mailcap tq emms-playing-time emms-lyrics derived time-date
emms-streams emms-mode-line emms-cache emms-info-ogginfo
emms-info-mp3info emms-info later-do emms-playlist-mode edmacro kmacro
emms-player-mplayer emms-player-simple emms-source-playlist
emms-source-file locate dired emms-setup emms emms-compat
gdb-shell-autoloads nxml-enc pydoc-info-autoloads info-look info
weblogger-autoloads xml-rpc-autoloads package reporter cal-china lunar
solar cal-dst cal-bahai cal-islam cal-hebrew holidays hol-loaddefs appt
diary-lib diary-loaddefs cal-menu easymenu calendar cal-loaddefs
uniquify mouse-sel easy-mmode notifications status cl dbus xml
erc-services erc-networks erc-goodies erc erc-backend erc-compat
format-spec thingatpt pp advice help-fns advice-preload bbdb timezone
ange-ftp comint regexp-opt ring server bbdb-autoloads tooltip ediff-hook
vc-hooks lisp-float-type mwheel x-win x-dnd tool-bar dnd fontset image
fringe lisp-mode register page menu-bar rfn-eshadow timer select
scroll-bar mouse jit-lock font-lock syntax facemenu font-core frame cham
georgian utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao
korean japanese hebrew greek romanian slovak czech european ethiopic
indian cyrillic chinese case-table epa-hook jka-cmpr-hook help simple
abbrev minibuffer loaddefs button faces cus-face files text-properties
overlay sha1 md5 base64 format env code-pages mule custom widget
hashtable-print-readable backquote make-network-process dbusbind
dynamic-setting system-font-setting font-render-setting move-toolbar gtk
x-toolkit x multi-tty emacs)

Tom