Merge pull request scala#4109 from retronym/ticket/1994

SI-1994 Test case for fixed overriding problem

Author: lrytz

test/files/run/t1994.scala

@@ -0,0 +1,20 @@
+class A {
+  protected def x = 0
+  protected[A] def y = 0
+}
+ 
+class B extends A {
+  override def x = 1
+  def superY = super[A].y
+  override def y = 1
+}
+
+
+object Test {
+  def main(args: Array[String]): Unit = {
+    val b = new B
+    assert(b.x == 1)
+    assert(b.y == 1)
+    assert(b.superY == 0)
+  }
+}