gistfile1.scala

// This works
class Foo(bar:Int) {
  def this(bar1:Int, bar2:Int) = this(bar1 + bar2)
}

gistfile2.txt

// This works
class Foo(bar:Int) {
  def this(bar1:Int, bar2:Int) = {
    this(bar1 + bar2)
  }
}

gistfile3.txt

// This doesn't
class Foo(bar:Int) { 
  def this(bar1:Int, bar2:Int) = {
    val summer = new Summer(bar1, bar2)
    this(summer.sum())
  }
}