bug#8077: cperl mode - indenting after long attribute list

[Ronald J Kimball]

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

Create a new file in cperl-mode.
Enter the following line:
sub foo : a('a') abcdefghi('foo') jklmnop('bar') qrstuv('baz')
On the next line, press tab.
Bug: It takes a long time for the indent to happen.
Make any attribute name longer, and the time increases considerably.


In GNU Emacs 22.2.1 (x86_64-pc-linux-gnu, X toolkit, Xaw3d scroll bars)
 of 2010-03-31 on crested, modified by Ubuntu
configured using `configure  '--build=x86_64-linux-gnu' 
'--host=x86_64-linux-gnu' '--prefix=/usr' '--sharedstatedir=/var/lib' 
'--libexecdir=/usr/lib' '--localstatedir=/var' '--infodir=/usr/share/info' 
'--mandir=/usr/share/man' '--with-pop=yes' 
'--enable-locallisppath=/etc/emacs22:/etc/emacs:/usr/local/share/emacs/22.2/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/22.2/site-lisp:/usr/share/emacs/site-lisp:/usr/share/emacs/22.2/leim'
 '--with-x=yes' '--with-x-toolkit=athena' '--with-toolkit-scroll-bars' 
'build_alias=x86_64-linux-gnu' 'host_alias=x86_64-linux-gnu' 'CFLAGS=-DDEBIAN 
-DSITELOAD_PURESIZE_EXTRA=5000 -g -O2' 'LDFLAGS=-g -Wl,--as-needed' 'CPPFLAGS=''

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: nil
  locale-coding-system: nil
  default-enable-multibyte-characters: t

Major mode: CPerl

Minor modes in effect:
  menu-bar-mode: t
  file-name-shadow-mode: t
  unify-8859-on-encoding-mode: t
  utf-translate-cjk-mode: t
  auto-compression-mode: t
  column-number-mode: t
  line-number-mode: t

Recent input:
ESC O B TAB ESC x m o d TAB TAB TAB C-g ESC x e m a 
c s - v TAB RET ESC x r e p o TAB r TAB RET

Recent messages:
For information about GNU Emacs and the GNU system, type C-h C-a.
Loading cperl-mode...done
Making completion list...
Loading help-mode...done
Quit
GNU Emacs 22.2.1 (x86_64-pc-linux-gnu, X toolkit, Xaw3d scroll bars) of 
2010-03-31 on crested, modified by Ubuntu
Making completion list...
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