(diagnostic
  (schema slovo.diagnostic)
  (version 1)
  (severity error)
  (code EmptyWhileBody)
  (message "`while` must have at least one body form")
  (file "<fixture>")
  (span
    (bytes 37 49)
    (range 5 3 5 15)
  )
  (hint "provide at least one unit-producing loop body form")
)