error[E0658]: trait aliases are experimental (see issue #41517) | |
--> $DIR/feature-gate-trait-alias.rs:11:1 | |
| | |
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`. |