Fix #1569: Improve avoidance algorithm

The essential change is that we do not throw away more
precise info of the avoided type if the expected type
is fully defined.

1 files changed, 6 insertions, 0 deletions

diff --git a/tests/pos/t1569.scala b/tests/pos/t1569.scala
new file mode 100644
index 000000000..5e48c03b1
--- /dev/null
+++ b/tests/pos/t1569.scala
@@ -0,0 +1,6 @@
+// See pos/t1569a.scala for related examples that work.
+object Bug {
+  class C { type T }
+  def foo(x: Int)(y: C)(z: y.T): Unit = {}
+  foo(3)(new C { type T = String })("hello")
+}