trace> if (Test.this.t)
  -0.0
else
  0.0
res: Double = -0.0

trace> if (Test.this.t)
  0.0
else
  -0.0
res: Double = 0.0

trace> Test.this.intercept.apply[Any](if (scala.Predef.???)
  -0.0
else
  0.0)
res: Any = class scala.NotImplementedError

trace> Test.this.intercept.apply[Any](if (scala.Predef.???)
  0.0
else
  0.0)
res: Any = class scala.NotImplementedError

trace> Test.this.intercept.apply[Any](if (scala.Predef.???)
  ()
else
  ())
res: Any = class scala.NotImplementedError