(diagnostic
  (schema slovo.diagnostic)
  (version 1)
  (severity error)
  (code EmptyStructUnsupported)
  (message "first-pass structs must declare at least one field")
  (file "<fixture>")
  (span
    (bytes 16 30)
    (range 4 1 4 15)
  )
  (hint "declare at least one `i32` field")
)