generators don't work with block scoped vars

[arv]

Original author: jmesserly@google.com (April 19, 2011 19:03:38)

Should generators work with blocked scoped vars? Seems like since these are both new features, they should be compatible. Right now "let" isn't even allowed in generator functions.

Original issue: http://code.google.com/p/traceur-compiler/issues/detail?id=6