warning: unexpected `cfg` condition value: (none)
  --> $DIR/order-independant.rs:8:7
   |
LL | #[cfg(a)]
   |       ^- help: specify a config value: `= "b"`
   |
   = note: expected values for `a` are: `b`
   = note: `#[warn(unexpected_cfgs)]` on by default

warning: unexpected `cfg` condition value: `unk`
  --> $DIR/order-independant.rs:12:7
   |
LL | #[cfg(a = "unk")]
   |       ^^^^^^^^^
   |
   = note: expected values for `a` are: `b`

warning: 2 warnings emitted