1 files changed, 31 insertions, 0 deletions
diff --git a/tests/untried/neg/patmat-type-check.scala b/tests/untried/neg/patmat-type-check.scala
new file mode 100644
index 000000000..26d0409fa
--- /dev/null
+++ b/tests/untried/neg/patmat-type-check.scala
@@ -0,0 +1,31 @@
+object Test
+{
+  def s1 = "bob".toList  match { case Seq('b', 'o', 'b') => true }  // list ok
+
+  // not final, allowed
+  class Bop
+  def s2(x: Bop) = x match { case Seq('b', 'o', 'b') => true }
+
+  // covariance, allowed
+  final class Bop4[+T]
+  def s3[T](x: Bop4[T]) = x match { case Seq('b', 'o', 'b') => true }
+
+  // contravariance, allowed
+  final class Bop5[T, U, -V]
+  def s4[T1, T2](x: Bop5[_, T1, T2]) = x match { case Seq('b', 'o', 'b') => true }
+
+  // free type parameter, allowed
+  final class Bop3[T]
+  def f4[T](x: Bop3[T]) = x match { case Seq('b', 'o', 'b') => true }
+
+  // String and Array are final/invariant, disallowed
+  def f1 = "bob".reverse match { case Seq('b', 'o', 'b') => true } // fail
+  def f2 = "bob".toArray match { case Seq('b', 'o', 'b') => true } // fail
+
+  // final, no type parameters, should be disallowed
+  final class Bop2
+  def f3(x: Bop2) = x match { case Seq('b', 'o', 'b') => true } // fail
+
+  // final, invariant type parameter, should be disallowed
+  def f4[T](x: Bop3[Char]) = x match { case Seq('b', 'o', 'b') => true } // fail
+}