Re: Regex match variables, threads, and recursion

On Fri, 05 Nov 1999 12:54:47 EST, Dan Sugalski wrote:
>	$search_string = "123abc";
>
>	sub foo {
>	    $again = shift;
>	    $search_string =~ /(\d+)(\w+)/;
>	    print "$1 $2\n";
>	    return unless $again;
>	    $search_string = "456def";
>	    foo(0);
>	    print "$1 $2\n";
>	}
>
>	foo(1);
>
>produces:
>
>123 abc
>456 def
>456 def
>
>I don't recall seeing this documented anywhere, though it very well might be.

Known bug.  See:
  http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/1998-11/msg00648.html

Ilya, this is a _serious_ bug in regular expressions, and I'm sad to
see that it hasn't been fixed in more than a year.  I have half a
mind to be cruel and "motivate" fixing it by not accepting any RE
patches until this is fixed. :-}


Sarathy
gsar@ActiveState.com

• Regex match variables, threads, and recursion by Dan Sugalski
• Re: Regex match variables, threads, and recursion by M.J.T. Guy
• Re: Regex match variables, threads, and recursion by Mark-Jason Dominus
• Re: Regex match variables, threads, and recursion by Gurusamy Sarathy
• Re: Regex match variables, threads, and recursion by Gurusamy Sarathy
• Re: Regex match variables, threads, and recursion by Ilya Zakharevich
• Re: Regex match variables, threads, and recursion by Hugo
• Re: Regex match variables, threads, and recursion by Ilya Zakharevich
• Re: Regex match variables, threads, and recursion by Gurusamy Sarathy
• Re: Regex match variables, threads, and recursion by Ilya Zakharevich
• Re: Regex match variables, threads, and recursion by Gurusamy Sarathy
• Re: Regex match variables, threads, and recursion by Ilya Zakharevich
• Re: Regex match variables, threads, and recursion by Larry Wall
• Re: Regex match variables, threads, and recursion by duff
• Report 19079 by H.Merijn Brand