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error[E0658]: box pattern syntax is experimental
--> $DIR/feature-gate-box_patterns.rs:2:9
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LL | let box x = Box::new('c');
| ^^^^^
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= 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
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
error: aborting due to 1 previous error
For more information about this error, try `rustc --explain E0658`.
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