invalid-arguments.none_not_empty.stderr

error: invalid `--check-cfg` argument: `cfg(foo,values(none("test")))`
   |
   = note: `none("test")` is invalid
   = note: `none()` in `values()` takes no argument
   = note: visit <https://doc.rust-lang.org/nightly/rustc/check-cfg.html> for more details