(diagnostic
  (schema slovo.diagnostic)
  (version 1)
  (severity error)
  (code MalformedResultConstructor)
  (message "`ok` constructor must be `(ok i32 i32 value)`")
  (file "<fixture>")
  (span
    (bytes 49 61)
    (range 5 3 5 15)
  )
  (hint "use `(ok i32 i32 value)`")
)