[Bug: 21.5-b28] cperl-mode fontification aborts or hangs xemacs

[Ville Skyttä]

On Thursday 20 November 2008, Ed Avis wrote:

> The following perl code trips up font-lock-mode in cperl-mode:
>
> #!/usr/bin/perl
> use warnings;
> use strict;
> use 5.010;
> while (<>) {
>     s{\A\s*<(\w+)>\1Slot</\1>\s*\z}
>
> To reproduce, run 'xemacs -nw -vanilla test-file' and type or paste in
> this code, then
>
>    M-x cperl-mode RET
>    M-x font-lock-mode RET
>    M-x font-lock-fontify-buffer RET
>
> XEmacs prints in the minibuffer:
>
>    Fontifying test... aborted.aborted.

I can reproduce with the current released perl-modes package, which is:

> (perl-modes ver: 1.09 upstream: No-Upstream-Ver)

...and contains cperl-mode.el version 5.0.  But the current perl-modes package 
from the experimental packages area (1.14, contains cperl-mode.el 6.2) does 
not seem to have this problem, so you may want to give it a try.