Add test

Author: nicolasstucki

tests/link-dce-failing/link-val-init-3.check

@@ -0,0 +1 @@
+

tests/link-dce-failing/link-val-init-3.scala

@@ -0,0 +1,12 @@
+
+object Test {
+  def main(args: Array[String]): Unit = {
+    new Foo
+  }
+}
+
+final class Foo extends Bar[Int]
+
+trait Bar[T] {
+  val value: Int = 42
+}