(diagnostic
  (schema slovo.diagnostic)
  (version 1)
  (severity error)
  (code MalformedUnwrapForm)
  (message "`unwrap_err` expects exactly one value")
  (file "<fixture>")
  (span
    (bytes 37 49)
    (range 5 3 5 15)
  )
  (hint "use `(unwrap_err value)`")
)