23.0.60; Mousehighlighting goes bonkers over syntax highlighting with different fonts

[David Kastrup <dak@gnu.org>]

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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 emacs-pretest-bug@gnu.org mailing list.

Please describe exactly what actions triggered the bug
and the precise symptoms of the bug:

Using occur in a syntax highlighted buffer which uses enlarged fonts, I
get the following screen shot:


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Both the occur highlighting and the mouse over highlighting leave
something to be desired.  The mouse highlighting is arguably completely
wrong.  When using C-u C-u C-x = in the original buffer at a suitable
point, I get


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        character: g (103, #o147, #x67)
preferred charset: ascii (ASCII (ISO646 IRV))
       code point: 0x67
           syntax: w 	which means: word
         category: a:ASCII graphic characters 32-126 (ISO646 IRV:1983[4/0])
		   l:Latin r:Japanese roman
      buffer code: #x67
        file code: not encodable by coding system utf-8-unix
          display: by this font (glyph code)
     -Misc-Fixed-Medium-R-Normal--20-200-75-75-C-100-ISO8859-1 (#x67)

Character code properties are not shown: customize what to show

There are text properties here:
  auto-composed        t
  face                 (font-latex-doctex-documentation-face font-latex-sectioning-3-face font-latex-sedate-face)
  fontified            t

[back]

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In GNU Emacs 23.0.60.8 (i686-pc-linux-gnu, GTK+ Version 2.12.0)
 of 2008-04-16 on lisa
Windowing system distributor `The X.Org Foundation', version 11.0.10300000
configured using `configure  '--prefix=/usr/local/emacs-21' '--without-toolkit-scroll-bars''

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: nil
  locale-coding-system: utf-8-unix
  default-enable-multibyte-characters: t

Major mode: PDFdocTeX

Minor modes in effect:
  shell-dirtrack-mode: t
  reftex-mode: t
  TeX-PDF-mode: t
  server-mode: t
  desktop-save-mode: t
  tooltip-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
  global-auto-composition-mode: t
  auto-composition-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent input:
<return> q y M-x o c c u r <return> n o g r p o u <backspace> 
<backspace> <backspace> o u p <return> <help-echo> 
<help-echo> <switch-frame> <switch-frame> <switch-frame> 
<switch-frame> M-x o c c u r <return> s e c t i o n 
<return> <help-echo> <help-echo> <help-echo> M-x o 
c c u r <return> s e c . * n o g r o u p <return> <help-echo> 
<help-echo> <help-echo> M-x <up> <return> \ c m d } 
<backspace> { \ n o g r o C-a \ <right> <right> <right> 
<right> <right> \ <return> <help-echo> <help-echo> 
M-x e m a c s - <backspace> <backspace> <backspace> 
<backspace> <backspace> <backspace> r e p o r t - e 
m a c s - b u g <return>

Recent messages:
nnml: Reading incoming mail from file...
nnml: Reading incoming mail (no new mail)...done
Checking new news...done
Are you sure you want to quit reading news? (y or n) 
Destroying external MIME viewers
(No changes need to be saved)
Searched 1 buffer; 63 matches for `nogroup'
Searched 1 buffer; 543 matches for `section'
Searched 1 buffer; 5 matches for `sec.*nogroup'
Searched 1 buffer; 6 matches for `\\cmd{\\nogro'

-- 
David Kastrup