(diagnostic
  (schema slovo.diagnostic)
  (version 1)
  (severity error)
  (code UnsupportedLocalType)
  (message "local variables support `i32`, `bool`, `i64`, `u32`, `u64`, `f64`, `string`, immutable direct-scalar-or-string arrays, concrete vectors, option/result, known struct values, and enum values")
  (file "<fixture>")
  (span
    (bytes 42 49)
    (range 5 8 5 15)
  )
  (expected "i32, bool, i64, u32, u64, f64, string, (array i32 N), (array i64 N), (array u32 N), (array u64 N), (array f64 N), (array bool N), (array string N), (vec i32), (vec i64), (vec f64), (vec bool), (vec string), option/result, known struct, or enum")
  (found "unit")
)