| error[E0658]: specialization is unstable | |
| --> $DIR/specialization-feature-gate-default.rs:7:1 | |
| | | |
| LL | / default impl<T> Foo for T { | |
| LL | | fn foo(&self) {} | |
| LL | | } | |
| | |_^ | |
| | | |
| = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information | |
| = help: add `#![feature(specialization)]` to the crate attributes to enable | |
| = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date | |
| error: aborting due to 1 previous error | |
| For more information about this error, try `rustc --explain E0658`. |