Hi, We use ORO in our application for to provide regular expression capability. One of our users had created an email validation expression as follows: ^[A-Za-z0-9#_!'\(\)\-]+([A-Za-z0-9#_!'\(\)\.\-]+)[EMAIL PROTECTED]'\(\)\-]+[\.]+([AZa-z0-9#_!'\(\)\.\-]+)+$
As you can see, this is inefficient and can be simplified to (at least) the following: ^[A-Za-z0-9#_!'\(\)\-]+[A-Za-z0-9#_!'\(\)[EMAIL PROTECTED]'\(\)\-]+[\.]+[AZa-z0-9#_!'\(\)\.\-]+$ However, the original expression seems to hang ORO when given a long, invalid, email. (Though I must admit I don't know whether it is hanging or just taking a really long time.) An example of an email that seems to slow it down/hang is: [EMAIL PROTECTED] Note that valid emails are evaluated successfully (i.e. [EMAIL PROTECTED] doesn't hang ORO). I am enclosing my test case as well. This seems to be an issue in the latest version - 2.0.7.
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