Deal gracefully with missing return types of abstract menthods.

1) Better error message: "missing return type" instead of `=' expected.
2) Allow them under language:Scala2

Fixes #871

1 files changed, 5 insertions, 0 deletions

diff --git a/tests/neg/i871.scala b/tests/neg/i871.scala
new file mode 100644
index 000000000..d8e1111a0
--- /dev/null
+++ b/tests/neg/i871.scala
@@ -0,0 +1,5 @@
+trait Message {
+  def first(x: Int)
+  def second
+    1
+}