[make-mode.el] Multi-line font locking not working correctly

[Ralf Angeli]

Suppose you want to type the following lines into a new Makefile:

FOO = bar \
        bar \
        bar

If you type everything by hand from top to bottom, as soon as <TAB> is
typed on the third line, fontification of the second line will
disappear.  Content typed in the third line will not be fontified
either.


In GNU Emacs 22.0.50.1 (i686-pc-linux-gnu, GTK+ Version 2.6.4)
 of 2005-05-30 on neutrino
Distributor `The XFree86 Project, Inc', version 11.0.40300001
configured using `configure '--with-gtk''

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
  locale-coding-system: iso-latin-1
  default-enable-multibyte-characters: t

Major mode: Makefile

Minor modes in effect:
  semantic-idle-scheduler-mode: t
  desktop-save-mode: t
  display-time-mode: t
  iswitchb-mode: t
  show-paren-mode: t
  encoded-kbd-mode: t
  mouse-wheel-mode: t
  auto-compression-mode: t
  menu-bar-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  unify-8859-on-encoding-mode: t
  utf-translate-cjk-mode: t
  column-number-mode: t
  line-number-mode: t
  transient-mark-mode: t
  next-error-follow-minor-mode:  Fol

Recent input:
<prior> <prior> C-x b <return> q C-x b <return> C-x 
C-f M-p M-p <return> F O O SPC = SPC x x x SPC \ <return> 
<tab> x x x SPC \ <return> <tab> x x x SPC \ <return> 
C-n C-_ C-_ C-_ C-_ C-_ C-_ C-_ C-_ F o o <backspace> 
<backspace> O O SPC = SPC b a r SPC \ <return> <tab> 
b a r SPC \ <return> <tab> b a r <up> <down> <down> 
<return> <up> <up> <up> C-SPC <down> <down> <down> 
M-w M-x r e p o r t - e m <tab> <return>

Recent messages:
Semantic parse changes failed: "Unhandled change group"
Force full reparse (Makefile) [2 times]
Semantic parse changes failed: "Unhandled change group"
Force full reparse (Makefile) [2 times]
Semantic parse changes failed: "Unhandled change group"
Force full reparse (Makefile) [2 times]
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Semantic parse changes failed: "Unhandled change group"
Force full reparse (Makefile) [2 times]