Warning 106 when using Marshal.to_string

[eWert-Online]

When using Marshal.to_string the following warning occurs:

82 |   let marshal (d : declaration) = Marshal.to_string d []
                                       ^^^^^^^^^^^^^^^^^^^^^^
Warning 106 [bucklescript-unimplemented-primitive]: Unimplemented primitive used:caml_output_value_to_string

and gets compiled to

import * as Caml_external_polyfill from "melange/lib/es6/caml_external_polyfill.js";

function marshal(d) {
  return Caml_external_polyfill.resolve("caml_output_value_to_string")(d, /* [] */0);
}

Marshal.from_string seems to not generate the warning and compiles to

import * as Marshal from "melange/lib/es6/marshal.js";

function unmarshal(s) {
  return Marshal.from_string(s, 0);
}

[jchavarri]

Afaik, Marshal module is not supported in Melange.

[anmonteiro]

Marshal is indeed not supported. Tracking this in #715.