t997.scala:7: error: wrong number of arguments for object Foo
"x" match { case Foo(a) => Console.println(a) }
                    ^
t997.scala:7: error: not found: value a
"x" match { case Foo(a) => Console.println(a) }
                                           ^
t997.scala:13: error: wrong number of arguments for object Foo
"x" match { case Foo(a, b, c) => Console.println((a,b,c)) }
                    ^
t997.scala:13: error: not found: value a
"x" match { case Foo(a, b, c) => Console.println((a,b,c)) }
                                                  ^
four errors found