(diagnostic
  (schema slovo.diagnostic)
  (version 1)
  (severity error)
  (code UnsafeRequired)
  (message "unsafe operation `alloc` requires an `unsafe` block")
  (file "<fixture>")
  (span
    (bytes 37 48)
    (range 5 3 5 14)
  )
  (hint "wrap the operation in `(unsafe ...)`")
  (related
    (span
      (file "<fixture>")
      (bytes 38 43)
      (range 5 4 5 9)
      (message "unsafe operation head")
    )
  )
)