type-diagnostics.scala:4: error: type mismatch;
 found   : Set[String] (in scala.collection)
 required: Set[String] (in scala.collection.immutable)
  def f = Calculator("Hello", binding.keySet: collection.Set[String])
                                            ^
type-diagnostics.scala:13: error: type mismatch;
 found   : List[a(in method f2)]
 required: List[a(in method f1)]
      y match { case y1: List[a] => f3(x, y1) }
                                          ^
type-diagnostics.scala:17: error: type mismatch;
 found   : String(in method f2)
 required: java.lang.String
  def f2[String](s: String) = strings(List(s))
                                           ^
type-diagnostics.scala:21: error: missing parameter type for expanded function
The argument types of an anonymous function must be fully known. (SLS 8.5)
Expected type was: ?
  val f = { case 5 => 10 }
          ^
four errors found