1 files changed, 10 insertions, 0 deletions
diff --git a/tests/run/phantomValueClass.scala b/tests/run/phantomValueClass.scala
new file mode 100644
index 000000000..fb4b8e2d0
--- /dev/null
+++ b/tests/run/phantomValueClass.scala
@@ -0,0 +1,10 @@
+final class Phantom[A](val s: String) extends AnyVal {
+  def compose(p: Phantom[A]): Phantom[A] = new Phantom[A](s+p.s)
+}
+
+object Test extends dotty.runtime.LegacyApp {
+  val x = new Phantom[Int]("foo")
+  val y = new Phantom[Int]("bar")
+  val z = x compose y
+  println(z.s)
+}