Nicolò Ribaudo b84f8e9234 Don't use _possibleConstructorReturn inside arrow functions (#6103)
Arrow functions can't be entrly skipped while traversing because this
references inside of them needs to be transformed, so I added a check
which prevents return statements inside arrow functions from being
saved for the transformation.

Fixes #5817 (regression)
2017-08-14 11:11:05 -04:00
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