4 files changed, 52 insertions, 0 deletions
diff --git a/test/files/pos/t8046c.scala b/test/files/pos/t8046c.scala
new file mode 100644
index 0000000000..f05b4c15b5
--- /dev/null
+++ b/test/files/pos/t8046c.scala
@@ -0,0 +1,19 @@
+trait One {
+  type Op[A]
+  type Alias[A] = Op[A]
+}
+
+trait Three extends One {
+  trait Op[A] extends (A => A)
+
+  def f1(f: Op[Int])            = f(5)
+  def f2(f: Alias[Int])         = f(5)
+  def f3[T <: Op[Int]](f: T)    = f(5)
+  def f4[T <: Alias[Int]](f: T) = f(5)
+  // ./a.scala:12: error: type mismatch;
+  //  found   : Int(5)
+  //  required: T1
+  //   def f4[T <: Alias[Int]](f: T) = f(5)
+  //                                     ^
+}
+
diff --git a/test/files/run/t8046.check b/test/files/run/t8046.check
new file mode 100644
index 0000000000..905b0b35ca
--- /dev/null
+++ b/test/files/run/t8046.check
@@ -0,0 +1,2 @@
+List(trait Op, trait Function1, class Object, class Any)
+BTS(T,Three.this.Op[Int],Int => Int,Object,Any)
diff --git a/test/files/run/t8046/Test.scala b/test/files/run/t8046/Test.scala
new file mode 100644
index 0000000000..f6b525d1b5
--- /dev/null
+++ b/test/files/run/t8046/Test.scala
@@ -0,0 +1,18 @@
+import scala.tools.partest._
+
+object Test extends DirectTest {
+  override def code = ""
+  override def extraSettings: String = "-usejavacp"
+
+  override def show() {
+    val c = newCompiler()
+    new c.Run
+    import c._
+
+    val f4 = typeOf[Three].member(newTermName("f4"))
+    val f4ParamInfo = f4.paramss.head.head.info
+    println(f4ParamInfo.baseClasses)
+    println(f4ParamInfo.baseTypeSeq)
+  }
+}
+
diff --git a/test/files/run/t8046/t8046c.scala b/test/files/run/t8046/t8046c.scala
new file mode 100644
index 0000000000..0b484da530
--- /dev/null
+++ b/test/files/run/t8046/t8046c.scala
@@ -0,0 +1,13 @@
+import language._
+
+trait One {
+  type Op[A]
+  type Alias[A] = Op[A]
+}
+
+trait Three extends One {
+  trait Op[A] extends (A => A)
+
+  def f4[T <: Alias[Int]](f: T) = 0
+}
+