Add test case

Author: odersky

tests/pos/i739.scala

@@ -0,0 +1,10 @@
+class Foo
+
+object Test {
+  def foo[T](x: T)(implicit ev: T): T = ???
+
+  def test: Unit = {
+    implicit val evidence: Foo = new Foo
+    foo(new Foo)
+  }
+}