Expected Behavior

dune --help output says:

EXIT STATUS
       dune exits with the following status:

       0   on success.

       123 on indiscriminate errors reported on standard error.

       124 on command line parsing errors.

       125 on unexpected internal errors (bugs).

This is the default from Cmdliner.

Actual Behavior

Possible exit codes are 0, 1 and 130:

Reproduction

1. Run dune with invalid arguments: dune --foo.
2. Check exit code: echo $? – currently outputs 1, not 124.

Specifications

• Version of dune (output of dune --version): 3.7.0
• Version of ocaml (output of ocamlc --version): 4.14.0
• Operating system (distribution and version): Xubuntu 22.04.2