error[E0658]: extern types are experimental (see issue #43467) | |
--> $DIR/feature-gate-extern_types.rs:12:5 | |
| | |
LL | type T; //~ ERROR extern types are experimental | |
| ^^^^^^^ | |
| | |
= help: add #![feature(extern_types)] to the crate attributes to enable | |
error: aborting due to previous error | |
For more information about this error, try `rustc --explain E0658`. |