(diagnostic
  (schema slovo.diagnostic)
  (version 1)
  (severity error)
  (code UnsupportedGenericStandardLibraryCall)
  (message "generic standard-library call `std.result.map` is reserved but not supported in beta.9")
  (file "<fixture>")
  (span
    (bytes 38 52)
    (range 5 4 5 18)
  )
  (expected "promoted concrete standard-library function")
  (found "std.result.map")
  (hint "use current concrete families such as `std.vec.i32.empty`")
)