Github user danielsun1106 commented on the pull request:
https://github.com/apache/groovy/commit/c24c0b7e6a67dcdf277207d4261cfa6f2b55031f#commitcomment-27230875
@jespersm I recalled that current implementation of the backend depends on
the lambda grammar somehow, because `this` of lambda is different from `this`
of closure, the former always references the enclosing instance.---
