1error[E0658]: use of unstable library feature 'is_sorted': new API 2 --> $DIR/feature-gate-is_sorted.rs:3:33 3 | 4LL | assert!([1, 2, 2, 9].iter().is_sorted()); 5 | ^^^^^^^^^ 6 | 7 = note: see issue #53485 <https://github.com/rust-lang/rust/issues/53485> for more information 8 = help: add `#![feature(is_sorted)]` to the crate attributes to enable 9 10error[E0658]: use of unstable library feature 'is_sorted': new API 11 --> $DIR/feature-gate-is_sorted.rs:5:39 12 | 13LL | assert!(![-2i32, -1, 0, 3].iter().is_sorted_by_key(|n| n.abs())); 14 | ^^^^^^^^^^^^^^^^ 15 | 16 = note: see issue #53485 <https://github.com/rust-lang/rust/issues/53485> for more information 17 = help: add `#![feature(is_sorted)]` to the crate attributes to enable 18 19error[E0658]: use of unstable library feature 'is_sorted': new API 20 --> $DIR/feature-gate-is_sorted.rs:9:26 21 | 22LL | assert!([1, 2, 2, 9].is_sorted()); 23 | ^^^^^^^^^ 24 | 25 = note: see issue #53485 <https://github.com/rust-lang/rust/issues/53485> for more information 26 = help: add `#![feature(is_sorted)]` to the crate attributes to enable 27 28error[E0658]: use of unstable library feature 'is_sorted': new API 29 --> $DIR/feature-gate-is_sorted.rs:11:32 30 | 31LL | assert!(![-2i32, -1, 0, 3].is_sorted_by_key(|n| n.abs())); 32 | ^^^^^^^^^^^^^^^^ 33 | 34 = note: see issue #53485 <https://github.com/rust-lang/rust/issues/53485> for more information 35 = help: add `#![feature(is_sorted)]` to the crate attributes to enable 36 37error: aborting due to 4 previous errors 38 39For more information about this error, try `rustc --explain E0658`. 40