Offer warning when demonstrably non-side-effect...

Offer warning when demonstrably non-side-effecting expressions appear in
statement position, which should be unintentional by definition. Threw
in removal of six places with useless discarded expressions which the
warning informed me about. No review.

1 files changed, 9 insertions, 9 deletions

diff --git a/test/files/neg/t2641.check b/test/files/neg/t2641.check
index 771624e8d9..2056a1b9ab 100644
--- a/test/files/neg/t2641.check
+++ b/test/files/neg/t2641.check
@@ -1,35 +1,35 @@
-t2641.scala:19: error: illegal cyclic reference involving trait ManagedSeq
+t2641.scala:18: error: illegal cyclic reference involving trait ManagedSeq
         with TraversableViewLike[A, ManagedSeqStrict[A], ManagedSeq[A]]
                                                          ^
-t2641.scala:17: error: illegal inheritance;
+t2641.scala:16: error: illegal inheritance;
  self-type ManagedSeq does not conform to ManagedSeqStrict[A]'s selftype ManagedSeqStrict[A]
         extends ManagedSeqStrict[A]
                 ^
-t2641.scala:18: error: illegal inheritance;
+t2641.scala:17: error: illegal inheritance;
  self-type ManagedSeq does not conform to scala.collection.TraversableView[A,ManagedSeqStrict[A]]'s selftype scala.collection.TraversableView[A,ManagedSeqStrict[A]]
         with TraversableView[A, ManagedSeqStrict[A]]
              ^
-t2641.scala:17: error: illegal inheritance;
+t2641.scala:16: error: illegal inheritance;
  self-type ManagedSeq does not conform to ScalaObject's selftype ScalaObject
         extends ManagedSeqStrict[A]
         ^
-t2641.scala:25: error: something is wrong (wrong class file?): trait ManagedSeq with type parameters [A,Coll] gets applied to arguments [], phase = typer
+t2641.scala:24: error: something is wrong (wrong class file?): trait ManagedSeq with type parameters [A,Coll] gets applied to arguments [], phase = typer
   trait Transformed[+B] extends ManagedSeq[B, Coll] with super.Transformed[B]
         ^
-t2641.scala:27: error: something is wrong (wrong class file?): trait ManagedSeq with type parameters [A,Coll] gets applied to arguments [], phase = namer
+t2641.scala:26: error: something is wrong (wrong class file?): trait ManagedSeq with type parameters [A,Coll] gets applied to arguments [], phase = namer
   trait Sliced extends Transformed[A] with super.Sliced {
                ^
-t2641.scala:27: error: illegal inheritance; superclass Any
+t2641.scala:26: error: illegal inheritance; superclass Any
  is not a subclass of the superclass ManagedSeqStrict
  of the mixin trait Transformed
   trait Sliced extends Transformed[A] with super.Sliced {
                        ^
-t2641.scala:27: error: illegal inheritance; superclass Any
+t2641.scala:26: error: illegal inheritance; superclass Any
  is not a subclass of the superclass Object
  of the mixin trait Sliced
   trait Sliced extends Transformed[A] with super.Sliced {
                                                  ^
-t2641.scala:28: error: value managedIterator is not a member of ManagedSeq
+t2641.scala:27: error: value managedIterator is not a member of ManagedSeq
     override def managedIterator = self.managedIterator slice (from, until)
                                         ^
 9 errors found