import scala.tools.partest.MemoryTest trait A { type T <: A } trait B { type T <: B } object Test extends MemoryTest { lazy val tb = { import scala.reflect.runtime.universe._ import scala.reflect.runtime.{currentMirror => cm} import scala.tools.reflect.ToolBox cm.mkToolBox() } override def maxDelta = 10 override def calcsPerIter = 8 override def calc() { var snippet = """ trait A { type T <: A } trait B { type T <: B } def foo[T](x: List[T]) = x foo(List(new A {}, new B {})) """.trim snippet = snippet + "\n" + (List.fill(50)(snippet.split("\n").last) mkString "\n") tb.typecheck(tb.parse(snippet)) } }