[rules-users] Problem with modify sentence

[Kevin Alonso]

Hi all,

I get a compilation error in a "then" part of the rule with the next 
sentence:

modify ( rules ) { allowedGuesses -= 1 }

This problem has appeared after update  from 5.0 CR1 to  Drools 5.0 
final version.

Is it  a bug?

Thank you,

Kevin.