Beefy Boxes and Bandwidth Generously Provided by pair Networks
We don't bite newbies here... much
 
PerlMonks  

Re^2: regex bug in perl 5.8.7

by imp (Priest)
on May 25, 2007 at 23:44 UTC ( #617631=note: print w/ replies, xml ) Need Help??


in reply to Re: regex bug in perl 5.8.7
in thread regex bug in perl 5.8.7

The pattern isn't meant to be meaningful. The regex I listed was already reduced to the simplest case I could find that still caused a segfault. The original form was much different.


Comment on Re^2: regex bug in perl 5.8.7
Re^3: regex bug in perl 5.8.7
by diotalevi (Canon) on May 26, 2007 at 00:12 UTC

    In the future, you might want to use the (?{...}) form instead since that has no implications for compiling and interpolating another regexp.

    ⠤⠤ ⠙⠊⠕⠞⠁⠇⠑⠧⠊

      The regex that originally triggered the segfault was an attempt at a joke that used a modified version of the regex I wrote in this node.

      The joke was that someone in an irc channel at work said "<3", and someone else asked what the opposite of "<3" was. My response was qr[(??{/^<3/?qr/\A\z/:qr//;})]

      Which is this when written in a legible manner:

      my $negative = qr[ (??{ /^<3/ ? qr/\A\z/ : qr//; }) ]x;
      Which segfaulted, but only when the text being searched started with '<3'. After a little exploration I found the minimal regex that still segfaulted, and posted about it.

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://617631]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others drinking their drinks and smoking their pipes about the Monastery: (13)
As of 2014-07-11 13:55 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    When choosing user names for websites, I prefer to use:








    Results (226 votes), past polls