[ jEdit-devel ] [ jedit-Bugs-1527824 ] Perl Syntax Highlighting hangs 4.3pre6

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Bugs item #1527824, was opened at 2006-07-24 08:27
Message generated for change (Settings changed) made by ezust
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Category: text area and syntax packages
Group: None
Status: Open
Resolution: None
>Priority: 7
Submitted By: Nicholas O'Leary (olearyni)
Assigned to: Nobody/Anonymous (nobody)
Summary: Perl Syntax Highlighting hangs 4.3pre6

Initial Comment:
Found another hang for the perl syntax with 4.3pre6 (cvs):

The following lines work fine:
      y_max_value       => (1 - $adjusted_lower_rate),
      x_labels_vertical => 1,

But these lines both cause jEdit to hang:
      y_label           => 'Pass Rate (%)',
      y_number_format   => \ &yformat,


It appears to be related to having the underscore after
a single character at the start of the line; if you
(re)move the underscores, then jedit doesn't hang.

Furthermore, whilst the first pair of lines don't hang
jEdit, the first one is highlighted incorrectly. I
believe its trying to highlight from the first 'y'
through to the 'd' of 'adjusted' as a regex (blue in
the default colour settings). Again, (re)moving the
initial underscore restores the proper highlighting.

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Comment By: Nicholas O'Leary (olearyni)
Date: 2006-07-24 11:02

Message:
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The 'y' at the start is significant as well. It is being
caught by the rule:

<SEQ_REGEXP TYPE="MARKUP"
   HASH_CHAR="y"
   AT_WORD_START="TRUE"
>y([^\p{Alnum}\p{Space}])(?:.*?[^\\])*?\1(?:.*?[^\\])*?\1[cds]*</SEQ_REGEXP>

This leads me to believe it will hang with any of q,t,m or
s, at the start as there are simliar rules with HASH_CHAR
set to them.

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You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=100588&aid=1527824&group_id=588