warn-unused-params.scala:9: warning: parameter value b in method f is never used
        b: String,               // warn
        ^
warn-unused-params.scala:32: warning: parameter value s in method i is never used
  def i(implicit s: String) = 42           // yes, warn
                 ^
warn-unused-params.scala:49: warning: parameter value u in class Unusing is never used
class Unusing(u: Int) {       // warn
              ^
warn-unused-params.scala:59: warning: parameter value s in class CaseyAtTheBat is never used
case class CaseyAtTheBat(k: Int)(s: String)        // warn
                                 ^
warn-unused-params.scala:62: warning: parameter value readResolve in method f is never used
  def f(readResolve: Int) = 42           // warn
        ^
error: No warnings can be incurred under -Xfatal-warnings.
5 warnings found
one error found