t8035-deprecated.scala:2: warning: Adaptation of argument list by inserting () is deprecated: this is unlikely to be what you want. signature: GenSetLike.apply(elem: A): Boolean given arguments: after adaptation: GenSetLike((): Unit) List(1,2,3).toSet() ^ t8035-deprecated.scala:5: warning: Adaptation of argument list by inserting () is deprecated: this is unlikely to be what you want. signature: A(x: T): Foo.A[T] given arguments: after adaptation: new A((): Unit) new A ^ t8035-deprecated.scala:9: warning: Adaptation of argument list by inserting () is deprecated: leaky (Object-receiving) target makes this especially dangerous. signature: Format.format(x$1: Any): String given arguments: after adaptation: Format.format((): Unit) sdf.format() ^ error: No warnings can be incurred under -Xfatal-warnings. three warnings found one error found