Tighter pattern matching hits the street.

is final and does not conform to the pattern, it will no longer compile.
See all the exciting things you can no longer do:

  "bob".reverse match { case Seq('b', 'o', 'b') => true } // denied!
  "bob".toArray match { case Seq('b', 'o', 'b') => true } // rejected!
  final class Dunk
  def f3(x: Dunk) = x match { case Seq('b', 'o', 'b') => true } // uh-uh!

And so forth.  Review by odersky.

1 files changed, 1 insertions, 1 deletions

diff --git a/test/files/pos/bug0646.scala b/test/files/pos/bug0646.scala
index 64214f65b1..a56e857223 100644
--- a/test/files/pos/bug0646.scala
+++ b/test/files/pos/bug0646.scala
@@ -10,7 +10,7 @@ object xfor {
     </bks>;
 
   new NodeSeq { val theSeq = books.child }  match {
-    case t @ <title>Blabla</title> => t
+    case t @ Seq(<title>Blabla</title>) => t
   }
 
   //val n: NodeSeq = new NodeSeq { val theSeq = books.child }