warning: the feature `extern_prelude` has been stable since 1.30.0 and no longer requires an attribute to enable | |
--> $DIR/extern-prelude-std.rs:2:12 | |
| | |
LL | #![feature(extern_prelude)] | |
| ^^^^^^^^^^^^^^ | |
| | |
= note: `#[warn(stable_features)]` on by default | |