1 files changed, 20 insertions, 0 deletions
diff --git a/tests/run/t8177f.scala b/tests/run/t8177f.scala
new file mode 100644
index 000000000..6f9a68c11
--- /dev/null
+++ b/tests/run/t8177f.scala
@@ -0,0 +1,20 @@
+trait Thing { type A; var p: A = _ }
+class A[T](final val x: Thing { type A = T }) {
+  type Q = T
+
+  def x1: T   = x.p
+  def x2: Q   = x.p
+  def x3: x.A = x.p
+}
+// all result types should be inferred as Int
+class B extends A[Int](null) {
+  def y1 = x1
+  def y2 = x2
+  val y3 = x3 // before SI-8177, this lead to a signature that erased to java.lang.Object
+}
+
+
+object Test extends dotty.runtime.LegacyApp {
+  val methods = classOf[B].getDeclaredMethods.sortBy(_.getName)
+  assert(methods.forall(_.toGenericString.startsWith("public int")))
+}