Add test

Author: odersky

tests/neg/i2514.scala

@@ -0,0 +1,10 @@
+object Foo {
+  def foo(): Int = {
+    val f: implicit Int => Int = (implicit x: Int) => 2 * x // error // error
+    f(2)
+  }
+
+  val f = (implicit x: Int) => x // error // error
+
+  ((implicit x: Int) => x): (implicit Int => Int) // error // error // error
+}