t1181.scala:9: error: type mismatch;
 found   : scala.collection.immutable.Map[Symbol,Symbol]
 required: Symbol
     _ => buildMap(map.updated(keyList.head, valueList.head), keyList.tail, valueList.tail)
                  ^
t1181.scala:8: warning: a pure expression does nothing in statement position; multiline expressions might require enclosing parentheses
     case (Nil, Nil) => map
                        ^
one warning found
one error found