(diagnostic
  (schema slovo.diagnostic)
  (version 1)
  (severity error)
  (code WhileConditionNotBool)
  (message "`while` condition must be bool")
  (file "<fixture>")
  (span
    (bytes 44 45)
    (range 5 10 5 11)
  )
  (expected "bool")
  (found "i32")
)