Disallowed super.XX calls to Any methods which ...

Disallowed super.XX calls to Any methods which are presently either
crashing the compiler (isInstanceOf) or leading to runtime failure (==
and !=) in addition to one which was being rewritten to a this call but
makes more sense disallowed like the others (##).

Closes #3736, review by odersky.

3 files changed, 36 insertions, 7 deletions

diff --git a/test/files/neg/bug3736.check b/test/files/neg/bug3736.check
new file mode 100644
index 0000000000..8a91088914
--- /dev/null
+++ b/test/files/neg/bug3736.check
@@ -0,0 +1,13 @@
+bug3736.scala:4: error: super not allowed here: use this.isInstanceOf instead
+    def f2 = super.isInstanceOf[String]
+                   ^
+bug3736.scala:6: error: super not allowed here: use this.== instead
+    def f4 = super.==(new AnyRef)
+                   ^
+bug3736.scala:7: error: super not allowed here: use this.!= instead
+    def f5 = super.!=(new AnyRef)
+                   ^
+bug3736.scala:8: error: super not allowed here: use this.## instead
+    def f6 = super.##
+                   ^
+four errors found
diff --git a/test/files/neg/bug3736.scala b/test/files/neg/bug3736.scala
new file mode 100644
index 0000000000..8e63021f69
--- /dev/null
+++ b/test/files/neg/bug3736.scala
@@ -0,0 +1,21 @@
+object Test {
+  class A {
+    def f1 = super.toString
+    def f2 = super.isInstanceOf[String]
+    def f3 = super.asInstanceOf[AnyRef]
+    def f4 = super.==(new AnyRef)
+    def f5 = super.!=(new AnyRef)
+    def f6 = super.##
+  }
+
+  def main(args: Array[String]): Unit = {
+    val x = new A
+    x.f1
+    x.f2
+    x.f3
+    x.f4
+    x.f5
+    x.f6
+  }
+}
+
diff --git a/test/files/run/hashhash.scala b/test/files/run/hashhash.scala
index 4a34ab12e0..d3800be876 100644
--- a/test/files/run/hashhash.scala
+++ b/test/files/run/hashhash.scala
@@ -1,15 +1,10 @@
-object Test
-{
-  class A { val x1 = this.## ; val x2 = super.## }
-  val myA = new A
-  assert(myA.x1 == myA.x2)
-
+object Test {
   def confirmSame(x: Any)       = assert(x.## == x.hashCode, "%s.## != %s.hashCode".format(x, x))
   def confirmDifferent(x: Any)  = assert(x.## != x.hashCode, "%s.## == %s.hashCode (but should not)".format(x, x))
 
   def main(args: Array[String]): Unit = {
     /** Just a little sanity check, not to be confused with a unit test. */
-    List(5, 5.5f, "abc", new AnyRef, new A, ()) foreach confirmSame
+    List(5, 5.5f, "abc", new AnyRef, ()) foreach confirmSame
     List(5.0f, 1.0d, -(5.0f), (-1.0d)) foreach confirmDifferent
   }
 }