geneweb @5.02: Error: This expression has type string but an expression was expected of type bytes

[ryandesign (Ryan Carsten Schmidt)]

​https://build.macports.org/builders/ports-13_x86_64-builder/builds/3356/steps/install-port/logs/stdio

camlp5r pa_extend.cmo q_MLast.cmo -o pa_macro5.ppo pa_macro5.ml
ocamlc -c -I `camlp5 -where` -impl pa_macro5.ppo
File "pa_macro5.ml", line 103, characters 10-21:
103 |   let v = String.copy Sys.ocaml_version in
                ^^^^^^^^^^^
Alert deprecated: Stdlib.String.copy
Strings now immutable: no need to copy
File "pa_macro5.ml", line 107, characters 11-12:
107 |     | _ -> v.[i] := '_' ];
                 ^
Error: This expression has type string but an expression was expected of type
         bytes