1 files changed, 16 insertions, 0 deletions
diff --git a/tests/neg/traitParamsTyper.scala b/tests/neg/traitParamsTyper.scala
new file mode 100644
index 000000000..f87ba3691
--- /dev/null
+++ b/tests/neg/traitParamsTyper.scala
@@ -0,0 +1,16 @@
+trait T(x: Int) {
+  def f = x
+}
+
+class C(x: Int) extends T() // error
+
+trait U extends C with T
+
+trait V extends C(1) with T(2) // two errors
+
+trait W extends T(3) // error
+
+
+class E extends T(0)
+class F extends E with T(1) // error
+