Erasure removes Unit typed local lazy val references

[allanrenucci]

scala> def foo = { lazy val bar: Unit = { println("Hello") }; bar }
def foo: Unit

scala> bar
// nothing happen

Given:

class Test {
  def foo = {
    lazy val bar: Unit = println("Hello")
    bar
  }
}

After erasure:

class Test() {
  def foo(): Unit = {
    lazy <accessor> def bar(): scala.runtime.BoxedUnit = {
      println("Hello")
      scala.runtime.BoxedUnit$#UNIT
    }
    () // no more call to `bar`
  }
}