patmatnew.scala:351: warning: a pure expression does nothing in statement position
        case 1 => "OK"
                  ^
patmatnew.scala:352: warning: a pure expression does nothing in statement position
        case 2 => assert(false); "KO"
                                 ^
patmatnew.scala:352: warning: multiline expressions might require enclosing parentheses; a value can be silently discarded when Unit is expected
        case 2 => assert(false); "KO"
                                 ^
patmatnew.scala:353: warning: a pure expression does nothing in statement position
        case 3 => assert(false); "KO"
                                 ^
patmatnew.scala:353: warning: multiline expressions might require enclosing parentheses; a value can be silently discarded when Unit is expected
        case 3 => assert(false); "KO"
                                 ^
patmatnew.scala:670: warning: This catches all Throwables. If this is really intended, use `case e : Throwable` to clear this warning.
            case e => {
                 ^
patmatnew.scala:489: warning: unreachable code
        case _ if false =>
                        ^