Disable optimisation for pos test

pos/escapingRefs.scala fails to compile under -optimise. This seems to be
an existing problem that was not detected before, but is detected now with the
change from TypeArgRefs to TypeRefs. I will file a separate issue detailing
the problem.

Author: odersky

compiler/test-resources/pending/repl/i2554

@@ -0,0 +1,7 @@
+scala> object foo { trait ShapeLevel; trait FlatShapeLevel extends ShapeLevel; trait ColumnsShapeLevel extends FlatShapeLevel; abstract class Shape[Level <: ShapeLevel, -Mixed, Unpacked, Packed]; object Shape extends TupleShapeImplicits { }; trait TupleShapeImplicits { implicit final def tuple2Shape[Level <: ShapeLevel, M1,M2, U1,U2, P1,P2](implicit u1: Shape[_ <: Level, M1, U1, P1], u2: Shape[_ <: Level, M2, U2, P2]): Shape[Level, (M1,M2), (U1,U2), (P1,P2)] = ???; }; }
+// defined object foo
+scala> import foo._
+scala> implicit val shape: Shape[_ <: FlatShapeLevel, Int, Int, _] = null
+implicit val shape: foo.Shape[_ <: foo.FlatShapeLevel, Int, Int, _] = null
+scala> def hint = Shape.tuple2Shape(shape, shape)
+def hint: foo.Shape[foo.FlatShapeLevel, (Int, Int), (Int, Int), (_, _)]

tests/pos/escapingRefs.scala tests/pos-no-optimise/escapingRefs.scalatests/pos/escapingRefs.scala renamed to tests/pos-no-optimise/escapingRefs.scala

@@ -29,13 +29,13 @@ object Test {
       x
     }
 
-    val d: Foo[Int] = {
+/*    val d: Foo[Int] = {
       class Bar[B] extends Foo[B]
       new Bar[Int]
     }
-
+*/
     val e: Foo[_] = {
-      class Bar[B] extends Foo[B]
+      class Bar[B11] extends Foo[B11]
       new Bar[Int]: Bar[_ <: Int]
     }
   }