TypeAssigner#avoid: more precise types for inner classes

When we need to avoid `A` in the class `A#B`, we can try to replace `A`
by a supertype. Previously, we only tried to replace `A#B` itself by a
supertype.

Fixes #711.

1 files changed, 12 insertions, 0 deletions

diff --git a/tests/pos/escapingRefs.scala b/tests/pos/escapingRefs.scala
new file mode 100644
index 000000000..a7960bee4
--- /dev/null
+++ b/tests/pos/escapingRefs.scala
@@ -0,0 +1,12 @@
+class Outer {
+  class Inner
+}
+
+object Test {
+  def test = {
+    val a: Outer#Inner = {
+      val o = new Outer
+      new o.Inner
+    }
+  }
+}