error[E0658]: attributes of the form `#[derive_*]` are reserved for the compiler (see issue #29644) | |
--> $DIR/feature-gate-custom_derive.rs:11:1 | |
| | |
LL | #[derive_Clone] | |
| ^^^^^^^^^^^^^^^ | |
| | |
= help: add #![feature(custom_derive)] to the crate attributes to enable | |
error: aborting due to previous error | |
For more information about this error, try `rustc --explain E0658`. |