bug#23240: 25.0.92; describe-key-briefly prompt doesn't show partial key sequence

[Ken Raeburn]

% emacs -Q
C-h c
C-h


After "C-h c" I get the expected prompt for a key or menu item.  After
the next "C-h" I expect to see the prompt stay and include the
incomplete key sequence.  Instead, it disappears, leaving no hint what
Emacs is waiting for.

Sometimes the cursor is shown in the first column of the minibuffer
window, and sometimes it's not; I haven't figured out if there's any
consistency there.  If the cursor is present, it generally seems to
disappear if I wait a few seconds.

If I use "emacs -Q -nw", then after the second C-h the text cursor is
always in the minibuffer window, with no text.




In GNU Emacs 25.0.92.3 (x86_64-unknown-linux-gnu, X toolkit, Xaw3d scroll bars)
 of 2016-04-07 built on just-testing.permabit.com
Windowing system distributor 'The X.Org Foundation', version 11.0.11103000
System Description:     Ubuntu 12.04.5 LTS

Configured using:
 'configure
 --prefix=/permabit/user/raeburn/dev/emacs/fsf/emacs-25.0.92/precise/Inst
 --with-x-toolkit=lucid --enable-checking --without-sound'

Configured features:
XAW3D XPM JPEG TIFF GIF PNG RSVG IMAGEMAGICK DBUS GSETTINGS NOTIFY ACL
LIBSELINUX GNUTLS LIBXML2 FREETYPE XFT ZLIB TOOLKIT_SCROLL_BARS LUCID
X11

Important settings:
  locale-coding-system: nil

Major mode: C/l

Minor modes in effect:
  diff-auto-refine-mode: t
  shell-dirtrack-mode: t
  rcirc-track-minor-mode: t
  display-time-mode: t
  global-hi-lock-mode: t
  hi-lock-mode: t
  icomplete-mode: t
  hideshowvis-minor-mode: t
  desktop-save-mode: t
  global-edit-server-edit-mode: t
  jabber-activity-mode: t
  which-function-mode: t
  tooltip-mode: t
  global-eldoc-mode: t
  eldoc-mode: t
  electric-indent-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
  abbrev-mode: t
  hs-minor-mode: t

Recent messages:
uncompressing help.el.gz...done
Type C-x 1 to delete the help window, C-M-v to scroll help.
mwheel-scroll: Beginning of buffer [3 times]
Mark set [2 times]
<nil> <down-mouse-1> is undefined
<nil> <mouse-1> is undefined
Type C-x 1 to delete the help window.
Use +,-,0 for further adjustment [2 times]
Grep finished (matches found)
C-h c runs the command describe-key-briefly

Load-path shadows:
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/usr/share/emacs/site-lisp/emacs-jabber/jabber-screen
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/usr/share/emacs/site-lisp/emacs-jabber/jabber-socks5
/permabit/user/raeburn/.emacs.d/elpa/jabber-20160124.552/jabber-muc hides 
/usr/share/emacs/site-lisp/emacs-jabber/jabber-muc
/permabit/user/raeburn/.emacs.d/elpa/jabber-20160124.552/jabber-chatbuffer 
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/permabit/user/raeburn/.emacs.d/elpa/jabber-20160124.552/jabber-events hides 
/usr/share/emacs/site-lisp/emacs-jabber/jabber-events
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/permabit/user/raeburn/.emacs.d/elpa/fsm-0.2/fsm hides 
/usr/share/emacs/site-lisp/emacs-jabber/fsm
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/usr/share/emacs/site-lisp/emacs-jabber/jabber-widget
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/usr/share/emacs/site-lisp/emacs-jabber/jabber-si-client
/permabit/user/raeburn/.emacs.d/elpa/jabber-20160124.552/jabber-sasl hides 
/usr/share/emacs/site-lisp/emacs-jabber/jabber-sasl
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/usr/share/emacs/site-lisp/emacs-jabber/jabber-ratpoison
/permabit/user/raeburn/.emacs.d/elpa/jabber-20160124.552/jabber-time hides 
/usr/share/emacs/site-lisp/emacs-jabber/jabber-time
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/usr/share/emacs/site-lisp/emacs-jabber/jabber-logon
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/usr/share/emacs/site-lisp/emacs-jabber/jabber-browse
/permabit/user/raeburn/.emacs.d/elpa/jabber-20160124.552/jabber-ahc-presence 
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/usr/share/emacs/site-lisp/emacs-jabber/jabber-roster
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/usr/share/emacs/site-lisp/emacs-jabber/jabber-compose
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/usr/share/emacs/site-lisp/emacs-jabber/jabber-search
/permabit/user/raeburn/.emacs.d/elpa/jabber-20160124.552/jabber-feature-neg 
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/usr/share/emacs/site-lisp/emacs-jabber/jabber-sawfish
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/usr/share/emacs/site-lisp/emacs-jabber/jabber-vcard
/permabit/user/raeburn/.emacs.d/elpa/jabber-20160124.552/jabber-ft-server hides 
/usr/share/emacs/site-lisp/emacs-jabber/jabber-ft-server
/permabit/user/raeburn/.emacs.d/elpa/jabber-20160124.552/jabber-activity hides 
/usr/share/emacs/site-lisp/emacs-jabber/jabber-activity
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/usr/share/emacs/site-lisp/emacs-jabber/jabber-export
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/usr/share/emacs/site-lisp/emacs-jabber/jabber-conn
/permabit/user/raeburn/.emacs.d/elpa/jabber-20160124.552/jabber-xml hides 
/usr/share/emacs/site-lisp/emacs-jabber/jabber-xml
/permabit/user/raeburn/.emacs.d/elpa/jabber-20160124.552/jabber hides 
/usr/share/emacs/site-lisp/emacs-jabber/jabber
/permabit/user/raeburn/.emacs.d/elpa/jabber-20160124.552/jabber-util hides 
/usr/share/emacs/site-lisp/emacs-jabber/jabber-util
/permabit/user/raeburn/.emacs.d/elpa/jabber-20160124.552/jabber-festival hides 
/usr/share/emacs/site-lisp/emacs-jabber/jabber-festival
/permabit/user/raeburn/.emacs.d/elpa/jabber-20160124.552/jabber-xmessage hides 
/usr/share/emacs/site-lisp/emacs-jabber/jabber-xmessage
/permabit/user/raeburn/.emacs.d/elpa/jabber-20160124.552/jabber-iq hides 
/usr/share/emacs/site-lisp/emacs-jabber/jabber-iq
/permabit/user/raeburn/.emacs.d/elpa/jabber-20160124.552/jabber-autoloads hides 
/usr/share/emacs/site-lisp/emacs-jabber/jabber-autoloads
/permabit/user/raeburn/.emacs.d/elpa/jabber-20160124.552/jabber-vcard-avatars 
hides /usr/share/emacs/site-lisp/emacs-jabber/jabber-vcard-avatars
/permabit/user/raeburn/.emacs.d/elpa/jabber-20160124.552/jabber-ft-common hides 
/usr/share/emacs/site-lisp/emacs-jabber/jabber-ft-common
/permabit/user/raeburn/.emacs.d/elpa/jabber-20160124.552/jabber-menu hides 
/usr/share/emacs/site-lisp/emacs-jabber/jabber-menu
/permabit/user/raeburn/.emacs.d/elpa/jabber-20160124.552/jabber-awesome hides 
/usr/share/emacs/site-lisp/emacs-jabber/jabber-awesome
/permabit/user/raeburn/.emacs.d/elpa/jabber-20160124.552/jabber-si-server hides 
/usr/share/emacs/site-lisp/emacs-jabber/jabber-si-server
/permabit/user/raeburn/.emacs.d/elpa/jabber-20160124.552/jabber-bookmarks hides 
/usr/share/emacs/site-lisp/emacs-jabber/jabber-bookmarks
/permabit/user/raeburn/.emacs.d/elpa/jabber-20160124.552/jabber-wmii hides 
/usr/share/emacs/site-lisp/emacs-jabber/jabber-wmii
/permabit/user/raeburn/.emacs.d/elpa/jabber-20160124.552/jabber-core hides 
/usr/share/emacs/site-lisp/emacs-jabber/jabber-core
/permabit/user/raeburn/.emacs.d/elpa/jabber-20160124.552/jabber-version hides 
/usr/share/emacs/site-lisp/emacs-jabber/jabber-version
/permabit/user/raeburn/.emacs.d/elpa/jabber-20160124.552/jabber-ourversion 
hides /usr/share/emacs/site-lisp/emacs-jabber/jabber-ourversion
/permabit/user/raeburn/.emacs.d/elpa/jabber-20160124.552/jabber-autoaway hides 
/usr/share/emacs/site-lisp/emacs-jabber/jabber-autoaway
/permabit/user/raeburn/.emacs.d/elpa/jabber-20160124.552/jabber-keymap hides 
/usr/share/emacs/site-lisp/emacs-jabber/jabber-keymap
/permabit/user/raeburn/.emacs.d/elpa/jabber-20160124.552/jabber-register hides 
/usr/share/emacs/site-lisp/emacs-jabber/jabber-register
/permabit/user/raeburn/.emacs.d/elpa/jabber-20160124.552/jabber-avatar hides 
/usr/share/emacs/site-lisp/emacs-jabber/jabber-avatar
/permabit/user/raeburn/.emacs.d/elpa/jabber-20160124.552/jabber-presence hides 
/usr/share/emacs/site-lisp/emacs-jabber/jabber-presence
/permabit/user/raeburn/.emacs.d/elpa/jabber-20160124.552/jabber-gmail hides 
/usr/share/emacs/site-lisp/emacs-jabber/jabber-gmail
/permabit/user/raeburn/.emacs.d/elpa/jabber-20160124.552/jabber-osd hides 
/usr/share/emacs/site-lisp/emacs-jabber/jabber-osd
/permabit/user/raeburn/.emacs.d/elpa/jabber-20160124.552/jabber-alert hides 
/usr/share/emacs/site-lisp/emacs-jabber/jabber-alert
/permabit/user/raeburn/.emacs.d/elpa/jabber-20160124.552/jabber-disco hides 
/usr/share/emacs/site-lisp/emacs-jabber/jabber-disco
/permabit/user/raeburn/.emacs.d/elpa/jabber-20160124.552/jabber-chat hides 
/usr/share/emacs/site-lisp/emacs-jabber/jabber-chat
/permabit/user/raeburn/.emacs.d/elpa/jabber-20160124.552/jabber-si-common hides 
/usr/share/emacs/site-lisp/emacs-jabber/jabber-si-common
/permabit/user/raeburn/.emacs.d/elpa/jabber-20160124.552/jabber-history hides 
/usr/share/emacs/site-lisp/emacs-jabber/jabber-history
/permabit/user/raeburn/.emacs.d/elpa/jabber-20160124.552/jabber-keepalive hides 
/usr/share/emacs/site-lisp/emacs-jabber/jabber-keepalive
/permabit/user/raeburn/.emacs.d/elpa/jabber-20160124.552/jabber-truncate hides 
/usr/share/emacs/site-lisp/emacs-jabber/jabber-truncate
/permabit/user/raeburn/.emacs.d/elpa/jabber-20160124.552/jabber-ahc hides 
/usr/share/emacs/site-lisp/emacs-jabber/jabber-ahc
/permabit/user/raeburn/.emacs.d/elpa/jabber-20160124.552/jabber-private hides 
/usr/share/emacs/site-lisp/emacs-jabber/jabber-private
/permabit/user/raeburn/.emacs.d/elpa/jabber-20160124.552/jabber-watch hides 
/usr/share/emacs/site-lisp/emacs-jabber/jabber-watch
~/permabit-emacs/kr-pdoc hides /permabit/user/raeburn/elisp/kr-pdoc
/permabit/user/raeburn/.emacs.d/elpa/systemtap-mode-20151122.1140/systemtap-mode
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/permabit/user/raeburn/.emacs.d/elpa/ssh-20120904.1342/ssh hides 
/permabit/user/raeburn/elisp/ssh
/permabit/user/raeburn/.emacs.d/elpa/hideshowvis-20130824.500/hideshowvis hides 
/permabit/user/raeburn/elisp/hideshowvis
/permabit/user/raeburn/.emacs.d/elpa/lua-mode-20151025.530/lua-mode hides 
/permabit/user/raeburn/elisp/lua-mode
/permabit/user/raeburn/.emacs.d/elpa/edit-server-20141231.1358/edit-server 
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~/permabit-emacs/c-fns hides /permabit/user/raeburn/elisp/c-fns
/permabit/user/raeburn/elisp/objdump/loaddefs hides 
/permabit/user/raeburn/dev/emacs/fsf/emacs-25.0.92/precise/Inst/share/emacs/25.0.92/lisp/loaddefs

Features:
(shadow sort mail-extr gnus-msg emacsbug sendmail eieio-opt speedbar
sb-image ezimage dframe ielm pp character-fold misearch multi-isearch
grep jabber-rtt goto-addr jabber-keepalive jabber-ping sasl-digest
hmac-md5 hex-util add-log list-frames server sh-script smie executable
make-mode nxml-uchnm rng-xsd xsd-regexp rng-cmpct rng-nxml rng-valid
rng-loc rng-uri rng-parse nxml-parse rng-match rng-dt rng-util rng-pttrn
nxml-ns nxml-mode nxml-outln nxml-rap nxml-util nxml-glyph nxml-enc
xmltok vc vc-dispatcher vc-git diff-mode python tramp-sh tramp
tramp-compat tramp-loaddefs trampver ucs-normalize shell warnings json
map seq systemtap-mode cc-awk face-remap autorevert filenotify gud
hideshow rcirc org-element org-rmail org-mhe org-irc org-info org-gnus
org-docview doc-view subr-x jka-compr image-mode org-bibtex bibtex
org-bbdb org-w3m org org-macro org-footnote org-pcomplete pcomplete
org-list org-faces org-entities noutline outline org-version
ob-emacs-lisp ob ob-tangle ob-ref ob-lob ob-table ob-exp org-src ob-keys
ob-comint ob-core ob-eval org-compat org-macs org-loaddefs find-func
cal-menu calendar cal-loaddefs time hi-lock icomplete kr-stuff
smart-quotes easy-mmode kr-hesiod hideshowvis desktop frameset
browse-url edit-server kr-gnus gnus-demon nntp gnus-art mm-uu mml2015
mm-view mml-smime smime dig gnus-sum gnus-group gnus-undo gnus-start
gnus-cloud nnimap nnmail mail-source utf7 netrc nnoo parse-time
gnus-spec gnus-int gnus-range message rfc822 mml mml-sec epg 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 iso-transl kr-dbus kr-math cc-mode cc-fonts cc-guess cc-menus
cc-cmds jabber jabber-notifications notifications jabber-libnotify dbus
jabber-awesome jabber-osd jabber-wmii jabber-xmessage jabber-festival
jabber-sawfish jabber-ratpoison jabber-tmux jabber-screen jabber-socks5
jabber-ft-server jabber-si-server jabber-ft-client jabber-ft-common
jabber-si-client jabber-si-common jabber-feature-neg jabber-truncate
jabber-time jabber-autoaway jabber-vcard-avatars jabber-chatstates
jabber-events jabber-vcard jabber-avatar mailcap jabber-activity
jabber-watch jabber-modeline jabber-ahc-presence jabber-ahc
jabber-version jabber-ourversion jabber-muc-nick-completion hippie-exp
jabber-browse jabber-search jabber-register jabber-roster format-spec
jabber-presence jabber-muc jabber-bookmarks jabber-private
jabber-muc-nick-coloring hexrgb jabber-widget jabber-disco wid-edit
jabber-chat jabber-history jabber-chatbuffer jabber-alert jabber-iq
jabber-core jabber-console sgml-mode ewoc jabber-keymap jabber-sasl sasl
sasl-anonymous sasl-login sasl-plain fsm jabber-logon jabber-conn srv
dns starttls tls gnutls jabber-xml xml jabber-menu jabber-util
auth-source cl-seq eieio byte-opt bytecomp byte-compile cl-extra cconv
eieio-core cl-macs gnus-util time-date mm-util help-fns help-mode
mail-prsvr password-cache kr-autoloads finder-inf ssh-autoloads info
package epg-config idutils derived thingatpt compile comint ansi-color
ring cperl-mode easymenu which-func imenu cc-styles cc-align cc-engine
cc-vars p4 dired kr-message-timestamp advice c-eldoc cl gv cc-defs
cl-loaddefs pcase cl-lib timeclock disp-table mule-util tooltip eldoc
electric uniquify ediff-hook vc-hooks lisp-float-type mwheel x-win
term/common-win x-dnd tool-bar dnd fontset image regexp-opt fringe
tabulated-list newcomment elisp-mode lisp-mode prog-mode register page
menu-bar rfn-eshadow timer select scroll-bar mouse jit-lock font-lock
syntax facemenu font-core frame cl-generic cham georgian utf-8-lang
misc-lang vietnamese tibetan thai tai-viet lao korean japanese eucjp-ms
cp51932 hebrew greek romanian slovak czech european ethiopic indian
cyrillic chinese charscript case-table epa-hook jka-cmpr-hook help
simple abbrev minibuffer cl-preloaded 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
dbusbind inotify dynamic-setting system-font-setting font-render-setting
x-toolkit x multi-tty make-network-process emacs)

Memory information:
((conses 16 815580 123933)
 (symbols 48 52425 1)
 (miscs 40 44007 6990)
 (strings 32 142083 36477)
 (string-bytes 1 4241493)
 (vectors 16 73201)
 (vector-slots 8 1272463 46940)
 (floats 8 688 460)
 (intervals 56 35773 1738)
 (buffers 976 157)
 (heap 1024 82329 3600))