I run it on WinXP with ActiveState Perl v5.10.0. (build 1004).

Localizing helped solving my problem, but I removed non-greed and tried to use (?>...)* but I must admit I don't fully understand documentation of this construct yet. Did you think about something like this? 

local $parens = qr{(?:(?>[^{}]*)|\{(??{$parens})\})*}x;

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In reply to Re^2: balanced parens regexp hangs by grizzley
in thread balanced parens regexp hangs - solved by grizzley

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