bug#19091: 24.4; help autocompletion glitch

[Emanuel Berg]

I wrote about this on gnu.emacs.help - this is part of
what I wrote:

Hit `C-h f' and type "gnus-summary--reset", then
strike `M-b' and hit TAB. Now it says
"gnus-summary--invreset", so hit RET.

    gnus-summary--invreset is an alias for
`gnus-summary--invreset', which is not defined. Please
make a bug report.

Of course, there is no gnus-summary--invreset
(deadlock) alias (but there is a `gnus-summary--inv')
so that's a bug I won't report...

I have seen such messages before so I suppose it is a
well-known bug (I'll report it just the same) but I
thought I'd mention it when I suddenly came a across
an example that is reproducible enough.



In GNU Emacs 24.4.1 (x86_64-pc-linux-gnu)
 of 2014-10-25 on trouble, modified by Debian
System Description:     Debian GNU/Linux testing (jessie)

Configured using:
 `configure --build x86_64-linux-gnu --prefix=/usr
 --sharedstatedir=/var/lib --libexecdir=/usr/lib
 --localstatedir=/var/lib --infodir=/usr/share/info
 --mandir=/usr/share/man --with-pop=yes
 
--enable-locallisppath=/etc/emacs24:/etc/emacs:/usr/local/share/emacs/24.4/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/24.4/site-lisp:/usr/share/emacs/site-lisp
 --build x86_64-linux-gnu --prefix=/usr
 --sharedstatedir=/var/lib --libexecdir=/usr/lib
 --localstatedir=/var/lib --infodir=/usr/share/info
 --mandir=/usr/share/man --with-pop=yes
 
--enable-locallisppath=/etc/emacs24:/etc/emacs:/usr/local/share/emacs/24.4/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/24.4/site-lisp:/usr/share/emacs/site-lisp
 --with-x=no --without-gconf --without-gsettings
 'CFLAGS=-g -O2 -fstack-protector-strong -Wformat
 -Werror=format-security -Wall'
 CPPFLAGS=-D_FORTIFY_SOURCE=2 LDFLAGS=-Wl,-z,relro'

Important settings:
  value of $LANG: en_US.UTF-8
  locale-coding-system: utf-8-unix

Major mode: Summary

Minor modes in effect:
  shell-dirtrack-mode: t
  show-paren-mode: t
  tooltip-mode: t
  electric-indent-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  auto-composition-mode: t
  buffer-read-only: t
  transient-mark-mode: t

Recent input:
C-f C-k ESC 0 C-o e C-n C-n C-n C-n C-n C-n C-n C-n 
C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n 
C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n 
C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-p C-p C-p 
C-c C-c w w RET i s k RET ESC o ESC k ESC k ESC k ESC 
k ESC k ESC k ESC k ESC k ESC k ESC k ESC k ESC k ESC 
k ESC k ESC k ESC k ESC k ESC k ESC k ESC i ESC i ESC 
o ESC p i s w l ESC x d RET k k k k k k k k k k k k 
k k k i C-u 1 0 0 RET C-o k C-p C-p C-p C-p C-p C-p 
C-p C-p C-p C-p C-p C-p C-p C-p C-p C-p C-p C-p C-p 
C-p C-p C-p C-p C-p C-p C-p C-p C-p C-p C-p C-p C-p 
C-p C-p C-p C-p C-p C-p C-p C-p C-p C-p C-p C-p C-p 
C-p C-p C-p C-p C-s g l i t c h RET RET ESC o C-n C-n 
C-p C-@ C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n 
C-n C-n C-n C-n C-n C-n C-n C-n C-g C-p C-p C-p C-p 
C-p C-p C-p C-p C-p C-p C-p C-p C-p C-p C-p C-p C-p 
C-@ C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n 
C-n C-n C-n C-n C-n C-n C-n C-n C-p C-p C-p C-p C-p 
C-e C-p C-p C-p C-p C-p C-p C-n C-n C-n C-n C-n C-n 
ESC w ESC o ESC p ESC x r e p o r t - b u g RET

Recent messages:
Sending via mail...
Sending email 
Sending email done
Mark set
Sending...done
Saving file /home/incal/News/.newsrc.eld...
Wrote /home/incal/News/.newsrc.eld
Saving file /home/incal/News/.newsrc.eld...
Wrote /home/incal/News/.newsrc.eld
  Nov 18 03:25 - Tuesday: week 47 - month 11 (of 30 days) - 2014

Load-path shadows:
/usr/share/emacs/24.4/site-lisp/debian-startup hides 
/usr/share/emacs/site-lisp/debian-startup
/usr/share/emacs24/site-lisp/flim/hex-util hides 
/usr/share/emacs/24.4/lisp/hex-util
/usr/share/emacs24/site-lisp/flim/md4 hides /usr/share/emacs/24.4/lisp/md4
/usr/share/emacs24/site-lisp/dictionaries-common/flyspell hides 
/usr/share/emacs/24.4/lisp/textmodes/flyspell
/usr/share/emacs24/site-lisp/dictionaries-common/ispell hides 
/usr/share/emacs/24.4/lisp/textmodes/ispell
/usr/share/emacs/site-lisp/rst hides /usr/share/emacs/24.4/lisp/textmodes/rst
/usr/share/emacs24/site-lisp/flim/sasl-cram hides 
/usr/share/emacs/24.4/lisp/net/sasl-cram
/usr/share/emacs24/site-lisp/flim/sasl-digest hides 
/usr/share/emacs/24.4/lisp/net/sasl-digest
/usr/share/emacs24/site-lisp/flim/ntlm hides /usr/share/emacs/24.4/lisp/net/ntlm
/usr/share/emacs24/site-lisp/flim/sasl-ntlm hides 
/usr/share/emacs/24.4/lisp/net/sasl-ntlm
/usr/share/emacs24/site-lisp/flim/hmac-md5 hides 
/usr/share/emacs/24.4/lisp/net/hmac-md5
/usr/share/emacs24/site-lisp/flim/sasl hides /usr/share/emacs/24.4/lisp/net/sasl
/usr/share/emacs24/site-lisp/flim/hmac-def hides 
/usr/share/emacs/24.4/lisp/net/hmac-def
/usr/share/emacs24/site-lisp/latex-cjk-thai/thai-word hides 
/usr/share/emacs/24.4/lisp/language/thai-word
/usr/share/emacs/24.4/lisp/faces hides ~/.emacs.d/emacs-init/compile/faces
/usr/share/emacs/24.4/lisp/window hides ~/.emacs.d/emacs-init/compile/window
/usr/share/emacs/24.4/lisp/abbrev hides ~/.emacs.d/emacs-init/compile/abbrev
/usr/share/emacs/24.4/lisp/misc hides ~/.emacs.d/emacs-init/compile/misc
/usr/share/emacs/24.4/lisp/obsolete/spell hides 
~/.emacs.d/emacs-init/compile/spell
/usr/share/emacs/24.4/lisp/align hides ~/.emacs.d/emacs-init/compile/align
/usr/share/emacs/24.4/lisp/help hides ~/.emacs.d/emacs-init/compile/help
/usr/share/emacs/24.4/lisp/textmodes/fill hides 
~/.emacs.d/emacs-init/compile/fill

Features:
(shadow emacsbug make-mode imenu nnagent conf-mode
latexenc dired-x cus-edit cus-start cus-load cc-langs
cc-mode cc-fonts cc-guess cc-menus cc-cmds cc-styles
cc-align cc-engine cc-vars cc-defs w3m-search canlock
eieio-opt speedbar sb-image ezimage dframe find-func
mailalias nnir gnus-cite flow-fill mm-archive
mail-extr gnus-async gnus-bcklg gnus-kill qp gnus-ml
disp-table pop3 nndraft nnmh nnml nnfolder parse-time
netrc gnutls network-stream starttls tls gnus-agent
gnus-score score-mode nnvirtual nntp gnus-cache
w3m-cookie mule-util w3m-filter ffap thingatpt
url-parse url-vars xsel wrap-search w3m-session dl
w3m-tabs w3m-bookmark w3m-form w3m browse-url doc-view
image-mode timezone w3m-hist w3m-fb bookmark-w3m
w3m-ems w3m-ccl ccl w3m-favicon image w3m-image
w3m-proc w3m-util time-my ispell sort revert-buffer-my
tramp-sh t-mouse jka-compr man linux-shell tex-mode
compile ielm pp mode-line lines debug info tool-bar
apropos help-mode guile gnus-srvr message-my moggle
smtpmail sendmail lamer group gnus-my article gnus-msg
gnus-art mm-uu mml2015 mm-view mml-smime smime dig
mailcap file-write-to package epg-config edit dired-my
files-my dired buc cl-macs gv global-keys tramp
tramp-compat auth-source eieio byte-opt bytecomp
byte-compile cconv eieio-core password-cache
tramp-loaddefs trampver shell pcomplete comint
regexp-opt ansi-color ring advice gnus-sum nnoo
gnus-group gnus-undo nnmail mail-source gnus-start
gnus-spec gnus-int gnus-range message format-spec
rfc822 mml easymenu 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 gnus-util time-date mail-utils
mm-util help-fns mail-prsvr wid-edit cl-loaddefs
cl-lib paren debian-el debian-el-loaddefs w3m-load
tooltip electric uniquify ediff-hook vc-hooks
lisp-float-type tabulated-list newcomment lisp-mode
prog-mode register page menu-bar rfn-eshadow timer
select 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 nadvice
loaddefs button faces cus-face macroexp files
text-properties overlay sha1 md5 base64 format env
code-pages mule custom widget hashtable-print-readable
backquote make-network-process dbusbind gfilenotify
multi-tty emacs)

Memory information:
((conses 16 383310 52513)
 (symbols 48 38866 129)
 (miscs 40 436 2413)
 (strings 32 82011 10555)
 (string-bytes 1 2736518)
 (vectors 16 38026)
 (vector-slots 8 1411160 163637)
 (floats 8 329 822)
 (intervals 56 13247 124)
 (buffers 960 124)
 (heap 1024 64095 5526))

-- 
underground experts united