unreachable expression

[yurivict]

This warning is printed during the build of the starship project:

warning: unreachable expression
   --> /wrkdirs/usr/ports/shells/starship/work/starship-1.4.0/cargo-crates/sys-info-0.9.1/lib.rs:857:5
    |
838 |                 return Err(Error::IO(io::Error::last_os_error()));
    |                 ------------------------------------------------- any code following this expression is unreachable
...
857 |     Err(Error::UnsupportedSystem)
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable expression
    |
note: the lint level is defined here
   --> /wrkdirs/usr/ports/shells/starship/work/starship-1.4.0/cargo-crates/sys-info-0.9.1/lib.rs:856:12
    |
856 |     #[warn(unreachable_code)]
    |            ^^^^^^^^^^^^^^^^

warning: `sys-info` (lib) generated 1 warning