error[E0658]: attributes on expressions are experimental. (see issue #15701) | |
--> $DIR/feature-gate-stmt_expr_attributes.rs:11:16 | |
| | |
LL | const X: i32 = #[allow(dead_code)] 8; | |
| ^^^^^^^^^^^^^^^^^^^ | |
| | |
= help: add #![feature(stmt_expr_attributes)] to the crate attributes to enable | |
error: aborting due to previous error | |
For more information about this error, try `rustc --explain E0658`. |