scala> val hello = "hi"; hellx
-- [E006] Not Found Error: ---------------------------------------------------------------------------------------------
1 |val hello = "hi"; hellx
  |                  ^^^^^
  |                  Not found: hellx
  |
  | longer explanation available when compiling with `-explain`
1 error found

scala> val hello = "hi"; this.hellx
-- [E008] Not Found Error: ---------------------------------------------------------------------------------------------
1 |val hello = "hi"; this.hellx
  |                  ^^^^^^^^^^
  |                value hellx is not a member of object rs$line$1 - did you mean (rs$line$1 : rs$line$1.type).hello?
1 error found