bug#9217: 23.1; can't escape quotes preceded by certain characters in perl-mode

[Gabriel Simon]

When I try to escape quotes with a backslash, within quotes, the 
coloring in perl-mode breaks in a very specific way.  It depends 
entirely on the characters that precede the backslash.  For example, 
this works fine:

$a = " x \"string\"";

but if you replace the 'x' with m, q, s, or y, then Emacs thinks you're 
still inside a quote.

You can find a screenshot here:

http://i.imgur.com/mG6ey.jpg

I've tried this in emacs 23.1, 23.2, and 22.2 on Windows and Linux and 
the problem is the same in all of these versions.

Thanks

--Gabe


If Emacs crashed, and you have the Emacs process in the gdb debugger,
please include the output from the following gdb commands:
    `bt full' and `xbacktrace'.
If you would like to further debug the crash, please read the file
c:/Program Files (x86)/emacs-23.1/etc/DEBUG for instructions.


In GNU Emacs 23.1.1 (i386-mingw-nt6.1.7601)
 of 2009-07-29 on SOFT-MJASON
Windowing system distributor `Microsoft Corp.', version 6.1.7601
configured using `configure --with-gcc (4.4)'

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: ENU
  value of $XMODIFIERS: nil
  locale-coding-system: cp1252
  default-enable-multibyte-characters: t

Major mode: Fundamental

Minor modes in effect:
  tooltip-mode: t
  tool-bar-mode: t
  mouse-wheel-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  blink-cursor-mode: t
  global-auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent input:
# ! <backspace> <backspace> C-p C-p C-p C-p C-k C-k
C-k C-k C-k # ! / u s r / b i n / p e r l <return>
<return> M-x p e r l SPC m o d e <return> $ t e s t
SPC = SPC " SPC y SPC \ " h e l l o \ " " ; <return>
<return> $ <backspace> E <backspace> $ t e s t SPC
= SPC " " ; C-p C-p <backspace> m <backspace> a <backspace>
b <backspace> c <backspace> y <help-echo> <help-echo>
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo>
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo>
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo>
<help-echo> <help-echo> <help-echo> <menu-bar> <help-menu>
<about-emacs> <help-echo> <help-echo> <help-echo> <help-echo>
<help-echo> <help-echo> <help-echo> <help-echo> M-x
r e p o r t SPC e <tab> <return>

Recent messages:
For information about GNU Emacs and the GNU system, type C-h C-a. [2 times]


-----------------------------------
Gabriel M. Simon, Ph.D.
Post-Doctoral Research Fellow
Laboratory of Dr. Jeffrey I. Gordon
Washington University in St. Louis
lab:  314-362-3963
cell: 858-964-8666

emacs_escape_quote_bug.jpg
Description: JPEG image