1 files changed, 15 insertions, 0 deletions
diff --git a/test/files/run/sigtp.scala b/test/files/run/sigtp.scala
new file mode 100644
index 0000000000..cd38184109
--- /dev/null
+++ b/test/files/run/sigtp.scala
@@ -0,0 +1,15 @@
+import scala.tools.partest._
+
+trait BugBase [A, E] {
+  val key: A
+  var next: E = _
+}
+
+final class Bug[A, B](val key: A) extends BugBase[A, Bug[A, B]] {
+  def foo = next
+}
+
+object Test extends App with SigTest {
+  show[BugBase[_, _]]()
+  show[Bug[_, _]]()
+}