REPL multi-line input feature is broken

[Glavo]

scala> {                                                                        
1 |{
  | ^
  | '}' expected, but eof found

scala> class C {
1 |class C {
  |         ^
  |         '}' expected, but eof found

scala> def f = {
1 |def f = {
  |         ^
  |         '}' expected, but eof found