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warning: trait aliases are experimental
--> $DIR/cfg-false-feature.rs:14:1
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LL | trait A = Clone;
| ^^^^^^^^^^^^^^^^
|
= note: see issue #41517 <https://github.com/rust-lang/rust/issues/41517> for more information
= help: add `#![feature(trait_alias)]` to the crate attributes to enable
= warning: unstable syntax can change at any point in the future, causing a hard error!
= note: for more information, see issue #65860 <https://github.com/rust-lang/rust/issues/65860>
warning: `macro` is experimental
--> $DIR/cfg-false-feature.rs:11:1
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LL | macro mac() {}
| ^^^^^^^^^^^^^^
|
= note: see issue #39412 <https://github.com/rust-lang/rust/issues/39412> for more information
= help: add `#![feature(decl_macro)]` to the crate attributes to enable
= warning: unstable syntax can change at any point in the future, causing a hard error!
= note: for more information, see issue #65860 <https://github.com/rust-lang/rust/issues/65860>
warning: box pattern syntax is experimental
--> $DIR/cfg-false-feature.rs:18:9
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LL | let box _ = Box::new(0);
| ^^^^^
|
= note: see issue #29641 <https://github.com/rust-lang/rust/issues/29641> for more information
= help: add `#![feature(box_patterns)]` to the crate attributes to enable
= warning: unstable syntax can change at any point in the future, causing a hard error!
= note: for more information, see issue #65860 <https://github.com/rust-lang/rust/issues/65860>
warning: 3 warnings emitted
|
