New tests

1 files changed, 29 insertions, 0 deletions

diff --git a/tests/pos/t9004.scala b/tests/pos/t9004.scala
new file mode 100644
index 000000000..d591bc852
--- /dev/null
+++ b/tests/pos/t9004.scala
@@ -0,0 +1,29 @@
+object Main {
+  trait AA[RR] { type R = RR; def r: R }
+
+  def test1(a: AA[_]) = {
+    val f = () => a.r
+    // The tree a.r is given the type `a.R` which normalizes
+    // to B', where B' is a distinct symbol ("captured existential skolem")
+    // to substitute for the reference to an existential skolem of B.
+    //
+    // inference of the result type of the function computes the
+    // packed type of tree `a.r` to make sure that terms and types
+    // local to the body of the function don't leak into its result
+    // type. The captured existential skolem is considered to be local
+    // so it is abstracted to its upper bound, Any.
+    //
+    // However, the packedType transformation need not have even considered
+    // B', as it is clear that the type `a.R` is not local to the function
+    // body!
+    f: (() => a.R)
+
+    // The workaround is to annotate the function type, rather than
+    // relying in inference.
+    val g: (() => a.R) = () => a.r
+    val g2  = () => a.r
+
+    ()
+  }
+  // typer debug trace: http://rawgit.com/retronym/d5aeaf8e0a4a2e6eef4b/raw/out.html
+}