2 files changed, 16 insertions, 0 deletions
diff --git a/test/files/neg/bug4221.check b/test/files/neg/bug4221.check
new file mode 100644
index 0000000000..471332e3c1
--- /dev/null
+++ b/test/files/neg/bug4221.check
@@ -0,0 +1,6 @@
+bug4221.scala:8: error: type mismatch;
+ found   : Unit
+ required: Wrapper[S]
+  def wrap[S <: Cl#Sub[S]](v: S): Wrapper[S] = {
+                                               ^
+one error found
diff --git a/test/files/neg/bug4221.scala b/test/files/neg/bug4221.scala
new file mode 100644
index 0000000000..0a8b8add18
--- /dev/null
+++ b/test/files/neg/bug4221.scala
@@ -0,0 +1,10 @@
+class Cl {
+        class Sub[TheSub <: Sub[TheSub]]
+}
+
+case class Wrapper[T](v: T)
+
+object O {
+  def wrap[S <: Cl#Sub[S]](v: S): Wrapper[S] = {
+  }
+}