error[E0658]: trait aliases are experimental | |
--> $DIR/feature-gate-trait-alias.rs:1:1 | |
| | |
LL | trait Foo = Default; | |
| ^^^^^^^^^^^^^^^^^^^^ | |
| | |
= note: see issue #41517 <https://github.com/rust-lang/rust/issues/41517> for more information | |
= help: add `#![feature(trait_alias)]` to the crate attributes to enable | |
error: aborting due to previous error | |
For more information about this error, try `rustc --explain E0658`. |