| error[E0658]: trait aliases are experimental (see issue #41517) | |
| --> $DIR/feature-gate-trait-alias.rs:1:1 | |
| | | |
| LL | trait Foo = Default; | |
| | ^^^^^^^^^^^^^^^^^^^^ | |
| | | |
| = 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`. |