in reply to Why am I get a core dump when I use ??{}

You call the regexp engine twice inside each other.

Older perls have problems if you use regexps from inside (?{ }), it seems that the regexp engine is not fully reentrant. If this is not an 5.8.x perl, try upgrading it.

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Re: Re: Why am I get a core dump when I use ??{}
by BazB (Priest) on Apr 09, 2004 at 21:16 UTC

    This core dumps on 5.8.3 - I dunno if upgrading can be classed as a solution :-)

    Update: Oh, and perlre (on 5.8.3) says:

    "(?{ code })"
    WARNING: This extended regular expression feature is considered highly experimental, and may be changed or deleted without notice.
    I think exploding satisfies the whole "highly experimental" bit.

    There is however a simple way of making the code work: you have too many question marks. Try: 

    print "$_ ", /(.*)(?{$countSpaces->()})/ ? "has 1 or no spaces\n" : "h
+as more than one space\n";

    [download]
    ...in the right place. The output is: 
    this line has more than one space
 has more than one space
     that_is_5_spaces
 has more than one space
This isonespaceonly
 has more than one space
therearenospaceshere
 has 1 or no spaces

    [download]
    ...which looks like (almost) the right output to me.

    Update 2 Erm, ah. Doh. (??{ code }) is perfectly valid according to perlre too - put equally experiment. Nevermind. Using highly experimental features is probably a bad idea.

    If the information in this post is inaccurate, or just plain wrong, don't just downvote - please post explaining what's wrong.
    That way everyone learns.
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Re: Re: Why am I get a core dump when I use ??{}
by ysth (Canon) on Apr 09, 2004 at 21:19 UTC
    It still dumps core on bleadperl.
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