[Mono-bugs] [Bug 654700] RegEx Failure

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https://bugzilla.novell.com/show_bug.cgi?id=654700

https://bugzilla.novell.com/show_bug.cgi?id=654700#c5


Rodrigo Kumpera <rkumpera at novell.com> changed:

           What    |Removed                     |Added
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             Status|ASSIGNED                    |NEW

--- Comment #5 from Rodrigo Kumpera <rkumpera at novell.com> 2010-11-23 19:46:22 UTC ---
Here is a reduced version of the bug:

string ippattern = @"^(2|29){1}$";

Regex checkip = new Regex(ippattern);
if (checkip.IsMatch("29")) // now check for ipaddress
    Console.WriteLine ("Good ip");
else
    Console.WriteLine ("BAD ip!");


The problem is that $ is not doing proper backtracking.

And it's going to be ugly, hard and messy to fix it.

Which means it requires someone to step up for something like a week
to fix this class of problems.

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