| warning: the feature `effects` is incomplete and may not be safe to use and/or cause compiler crashes | |
| --> $DIR/effect-var.rs:4:12 | |
| | | |
| LL | #![feature(effects)] | |
| | ^^^^^^^ | |
| | | |
| = note: see issue #102090 <https://github.com/rust-lang/rust/issues/102090> for more information | |
| = note: `#[warn(incomplete_features)]` on by default | |
| warning: 1 warning emitted | |