warning: unexpected `cfg` condition name: `value`
  --> $DIR/cfg-value-for-cfg-name-duplicate.rs:8:7
   |
LL | #[cfg(value)]
   |       ^^^^^
   |
   = help: expected names are: `bar`, `bee`, `cow`, and `foo` and 31 more
   = help: to expect this configuration use `--check-cfg=cfg(value)`
   = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg.html> for more information about checking conditional configuration
   = note: `#[warn(unexpected_cfgs)]` on by default

warning: 1 warning emitted