LambdaRestrictionStrategy does not catch lambdas passed to sack()

gremlin> g.V().limit(1).map{ System.exit(1) }
The provided traversal contains a lambda step: LambdaMapStep(lambda)
Type ':help' or ':h' for help.
Display stack trace? [yN]n
gremlin> g.withSack(0).V().limit(1).sack{ v,s -> System.exit(1) }
/// nothing