WHAT HAPPENS:
=============

The documentation for `highlight-regexp' ( info:emacs#Highlight
Interactively]] ) says, "While being prompted for a face use ‘M-n’ and
‘M-p’ to cycle through them." However, repeatedly keying ‘M-n’ will
toggle through the entries in `hi-lock-face-defaults' *twice*, and then
will start displaying _other items_, presumably from some other
 history ring, but not necessarily faces. In my case, some of the _other
items_ that appear when I ‘M-n’ cycle, were: apropos-variable-button,
org-target, bookmark-menu-bookmark, org-agenda-date-today, and
ido-incomplete-regexp.


Furthermore, if one of those _other items_ is selected,
`highlight-regexp' exits, without indicating an error, and without
highlighting the requested regexp in *any* face.


Furthermore, `highlight-regexp', as an alias for function
`hi-lock-face-buffer', hard codes face `hi-yellow' as a default, but
that default isn't used when one of those non-face _other items_ are
selected.


Finally, it seems inconsistent with the emacs spirit of flexibility to
have `hi-yellow' be hard-coded as a default in function
`hi-lock-face-buffer'.


Post-finally, courtesy of the indentation police: in function
`hi-lock-read-face-name', the `then` and `else` elements of the
function's only `if` form, are out-dented.

WHAT I EXPECTED:
================
1] There are a few ways I expected `M-n` could toggle - either through
only the entries in `hi-lock-face-defaults'; through the entries in
`hi-lock-face-defaults' plus faces the user had previously entered for
hi-lock purposes; or through the entries in `hi-lock-face-defaults' plus
faces the user had previously entered for any purpose. It should never
*offer* the user an invalid option. Also, it should never accept an
entry that isn't a face.

2] If, somehow, something other than a valid face is entered, the user
should be notified, and sent back to the prompt, with the same option of
`M-n` cycling.

3] If, somehow, something other than a valid face is accepted, the
default should be used.

4] The default should not be hard-coded as `hi-yellow`, or as anything
else. It should be set to user-definable variable, say
`hi-lock-default-face', which could have a default value of `hi-yellow'.

5] Indentation readability / inconsistency quibble.



In GNU Emacs 24.4.1 (x86_64-pc-linux-gnu)
 of 2014-12-09 on gaia, modified by Debian
System Description:     Debian 7.0 GNU/Linux wheezy/testing

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/s\
ite-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/s\
ite-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.utf8
  locale-coding-system: utf-8-unix

Major mode: IBuffer

Minor modes in effect:
  highlight-current-line-minor-mode: t
  desktop-save-mode: t
  savehist-mode: t
  winner-mode: t
  global-hi-lock-mode: t
  hi-lock-mode: t
  delete-selection-mode: t
  shell-dirtrack-mode: t
  tooltip-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
  buffer-read-only: t
  size-indication-mode: t
  column-number-mode: t
  line-number-mode: t
  transient-mark-mode: t

Load-path shadows:
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/usr/share/emacs24/site-lisp/w3m/w3m-favicon
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/usr/share/emacs24/site-lisp/w3m/w3m-symbol
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/usr/share/emacs24/site-lisp/w3m/bookmark-w3m
/home/boruch/.emacs.d/elpa/w3m-20140107.1708/mime-w3m hides
/usr/share/emacs24/site-lisp/w3m/mime-w3m
/home/boruch/.emacs.d/elpa/w3m-20140107.1708/w3m-filter hides
/usr/share/emacs24/site-lisp/w3m/w3m-filter
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/usr/share/emacs24/site-lisp/w3m/w3m-ccl
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/usr/share/emacs24/site-lisp/w3m/octet
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/usr/share/emacs24/site-lisp/w3m/w3m-perldoc
/home/boruch/.emacs.d/elpa/w3m-20140107.1708/w3m-dtree hides
/usr/share/emacs24/site-lisp/w3m/w3m-dtree
/home/boruch/.emacs.d/elpa/w3m-20140107.1708/w3m-session hides
/usr/share/emacs24/site-lisp/w3m/w3m-session
/home/boruch/.emacs.d/elpa/w3m-20140107.1708/w3m-mail hides
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/usr/share/emacs24/site-lisp/w3m/w3mhack
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/usr/share/emacs24/site-lisp/w3m/w3m-proc
/home/boruch/.emacs.d/elpa/w3m-20140107.1708/w3m-tabmenu hides
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/home/boruch/.emacs.d/elpa/w3m-20140107.1708/w3m-hist hides
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/home/boruch/.emacs.d/elpa/w3m-20140107.1708/w3m-bug hides
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/home/boruch/.emacs.d/elpa/w3m-20140107.1708/w3m-fb hides
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/usr/share/emacs24/site-lisp/w3m/w3m-antenna
/home/boruch/.emacs.d/elpa/w3m-20140107.1708/w3m-util hides
/usr/share/emacs24/site-lisp/w3m/w3m-util
/home/boruch/.emacs.d/elpa/csv-mode-1.2/csv-mode hides
/usr/share/emacs24/site-lisp/emacs-goodies-el/csv-mode
/usr/share/emacs/24.4/site-lisp/cdargs hides
/usr/share/emacs/site-lisp/cdargs
/usr/share/emacs/24.4/site-lisp/debian-startup hides
/usr/share/emacs/site-lisp/debian-startup
/usr/share/emacs24/site-lisp/flim/md4 hides /usr/share/emacs/24.4/lisp/md4
/usr/share/emacs24/site-lisp/flim/hex-util hides
/usr/share/emacs/24.4/lisp/hex-util
/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-ntlm hides
/usr/share/emacs/24.4/lisp/net/sasl-ntlm
/usr/share/emacs24/site-lisp/flim/hmac-def hides
/usr/share/emacs/24.4/lisp/net/hmac-def
/usr/share/emacs24/site-lisp/flim/hmac-md5 hides
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/usr/share/emacs24/site-lisp/flim/sasl-cram hides
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/usr/share/emacs24/site-lisp/flim/sasl hides
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/usr/share/emacs/24.4/lisp/emacs-lisp/ert-x hides
/usr/share/emacs/24.4/site-lisp/slime/lib/ert-x
/usr/share/emacs/24.4/lisp/emacs-lisp/cl-lib hides
/usr/share/emacs/24.4/site-lisp/slime/lib/cl-lib
/usr/share/emacs/24.4/lisp/emacs-lisp/ert hides
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Features:
(shadow sort mail-extr emacsbug message rfc822 mml mml-sec mm-decode
mm-bodies mm-encode mailabbrev ...)

Memory information:
((conses 16 459100 69911)
 (symbols 48 42873 0)
 (miscs 40 2286 3515)
 (strings 32 125530 18155)
 (string-bytes 1 3397524)
 (vectors 16 43381)
 (vector-slots 8 1545011 166125)
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 (intervals 56 10688 1329)
 (buffers 960 72)
 (heap 1024 42235 1854))


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