error[E0658]: attributes on expressions are experimental | |
--> $DIR/stmt-expr-gated.rs:2:13 | |
| | |
LL | let _ = #[deny(warnings)] if true { | |
| ^^^^^^^^^^^^^^^^^ | |
| | |
= note: see issue #15701 <https://github.com/rust-lang/rust/issues/15701> for more information | |
= 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`. |