Relaxing a check for ticket #2486, plus test case.

proposing this as the long-term fix (unless by some miracle it is the
right fix, in which case good for me.)

1 files changed, 3 insertions, 0 deletions

diff --git a/test/files/pos/bug2486.scala b/test/files/pos/bug2486.scala
new file mode 100644
index 0000000000..69fe4c127e
--- /dev/null
+++ b/test/files/pos/bug2486.scala
@@ -0,0 +1,3 @@
+class A[T]
+class B extends A[Int]
+class C[T] extends A[T] { def f(t: A[T]) = t match { case x: B => () } }