Confusing error message when using Set in pattern match

[scabug]

// Test.scala
class Test {
  def doStuff(): Unit = {
    val (Seq(value), Set.empty[String]) = computeStuff(17)
  }

  def computeStuff(n: Int): (Seq[Int], Set[String]) =
    (Seq(n * 2), Set.empty[String])
}

Test.scala:3: error: type empty is not a member of object scala.collection.immutable.Set
    val (Seq(value), Set.empty[String]) = computeStuff(17)
                         ^
one error found

[scabug]

Imported From: https://issues.scala-lang.org/browse/SI-8982?orig=1
Reporter: Mikael Ståldal (mikaelstaldal)
Affected Versions: 2.11.4