Betcha Can't Break This: Spoiler

If you haven't read the previous post, and would like to give it a go, skip this post.

SPOILER Ahead:

Here is one way to print 'something nefarious' in the Groovy program:

groovy ez " String() ; println 'something nefarious' ; new String"

It is clearly inspired by SQL injection. I tried using categories and some other tricks but everything else failed.

I'm writing this right after the original post, and scheduling publication for this afternoon. I'm looking forward to seeing solutions.