(diagnostic
  (schema slovo.diagnostic)
  (version 1)
  (severity error)
  (code TestExpressionNotBool)
  (message "test `loop final` must evaluate to bool")
  (file "<fixture>")
  (span
    (bytes 53 80)
    (range 6 3 7 15)
  )
  (expected "bool")
  (found "unit")
)