Closes #4202 and removes empty TreeHashMap (sup...

Closes #4202 and removes empty TreeHashMap (superseded by HashMap
implementation). No review

1 files changed, 7 insertions, 0 deletions

diff --git a/test/files/pos/t4202.scala b/test/files/pos/t4202.scala
new file mode 100644
index 0000000000..dbedd0bf79
--- /dev/null
+++ b/test/files/pos/t4202.scala
@@ -0,0 +1,7 @@
+object t4202 {
+  () => {
+    trait T {
+      def t = ()
+    }
+  }
+}