Add some run tests

Author: odersky

tests/pending/run/t2337.scala renamed to tests/disabled/not-representable/t2337.scala

@@ -1,4 +1,4 @@
-
+// Failure of autotupling in the presence of overloaded functions.
 object Test {
 
   def compare(first: Any, second: Any): Any = {

tests/pending/run/t2337.check

@@ -1,10 +1,26 @@
-object Test {
-  case object Bob { override def equals(other: Any) = true }
-  def f(x: Any) = x match { case Bob => Bob }
-
-  def main(args: Array[String]): Unit = {
-    assert(f(Bob) eq Bob)
-    assert(f(0) eq Bob)
-    assert(f(Nil) eq Bob)
-  }
-}
+    object Test {
+      case object Bob { override def equals(other: Any) = true }
+
+      class Bob2 {
+        override def equals(other: Any) = true
+      }
+      val Bob2 = new Bob2
+
+      def f0(x: Any) = x match { case Bob2 => Bob2 } // class cast exception at runtime, dotc only
+      def f1(x: Any) = x match { case Bob => Bob } // class cast exception at runtime, dotc only
+      def f2(x: Any): Bob.type = x match { case x @ Bob => x } // class cast exception at runtime, dotc and javac.
+
+      def main(args: Array[String]): Unit = {
+        assert(f0(Bob2) eq Bob2)
+        assert(f0(0) eq Bob2)  // only dotty fails here
+        assert(f0(Nil) eq Bob2)
+
+        assert(f1(Bob) eq Bob)
+        assert(f1(0) eq Bob)  // only dotty fails here
+        assert(f1(Nil) eq Bob)
+
+        assert(f2(Bob) eq Bob)
+        assert(f2(0) eq Bob) // both dotty and scalac fail here
+        assert(f2(Nil) eq Bob)
+      }
+    }