| warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes | |
| --> $DIR/issue-70442.rs:1:12 | |
| | | |
| LL | #![feature(specialization)] | |
| | ^^^^^^^^^^^^^^ | |
| | | |
| = note: `#[warn(incomplete_features)]` on by default | |
| = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information | |
| warning: 1 warning emitted | |