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Re^3: regex bug in perl 5.8.7

by diotalevi (Canon)
on May 26, 2007 at 00:12 UTC ( [id://617633]=note: print w/replies, xml ) Need Help??


in reply to Re^2: regex bug in perl 5.8.7
in thread regex bug in perl 5.8.7

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

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Re^4: regex bug in perl 5.8.7
by imp (Priest) on May 26, 2007 at 04:31 UTC
    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;

    [download]
    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.
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