Some regexp inside ExtendScript freeze InDesign

Hello everybody!

I am verifying that some particular regexp freezes InDesign when executed inside ExtenScript.

For example:

     if (m = line.match(/^sort\s+((?:a(?:lphabetically)?|n(?:umerically)?)|r(?:everse)?){1,2}$/i)) { ...

(meaning that my parser accept lines in one of these forms:

     sort alphabetically reverse

     sort numerically

     sort ar

     sort reverse numerically

and so on...).

Another example.

If I use this, everything is working:

     m = line.match(/corner\s+((?:\+|\-)?\d+)(?:\s|$)/);

but, if I add the bolded part \d*\.?:

     m = line.match(/corner\s+((?:\+|\-)?\d*\.?\d+)(?:\s|$)/);

when executing, InDesign freezes.

What do you think? Maybe ExtendScript contains some bug on the regexp engine? Am I wrong somewhere and I am not able to understand where? :-(

Do you experiment the same failure than me when you execute all that?

I am working on Indesign CS6, CC, CC 2014.

Many thanks ...

Roberto