SOURCE_FILE@0..19
  ERROR@0..6
    ABI@0..6
      EXTERN_KW@0..6 "extern"
  WHITESPACE@6..7 " "
  STRUCT@7..18
    STRUCT_KW@7..13 "struct"
    WHITESPACE@13..14 " "
    NAME@14..17
      IDENT@14..17 "Foo"
    SEMICOLON@17..18 ";"
  WHITESPACE@18..19 "\n"
error 6..6: expected existential, fn, trait or impl