1 error[E0658]: use of unstable library feature 'is_sorted': new API (see issue #53485)
2 --> $DIR/feature-gate-is_sorted.rs:13:33
4 LL | assert!([1, 2, 2, 9].iter().is_sorted());
7 = help: add #![feature(is_sorted)] to the crate attributes to enable
9 error[E0658]: use of unstable library feature 'is_sorted': new API (see issue #53485)
10 --> $DIR/feature-gate-is_sorted.rs:15:39
12 LL | assert!(![-2i32, -1, 0, 3].iter().is_sorted_by_key(|n| n.abs()));
15 = help: add #![feature(is_sorted)] to the crate attributes to enable
17 error[E0658]: use of unstable library feature 'is_sorted': new API (see issue #53485)
18 --> $DIR/feature-gate-is_sorted.rs:19:26
20 LL | assert!([1, 2, 2, 9].is_sorted());
23 = help: add #![feature(is_sorted)] to the crate attributes to enable
25 error[E0658]: use of unstable library feature 'is_sorted': new API (see issue #53485)
26 --> $DIR/feature-gate-is_sorted.rs:21:32
28 LL | assert!(![-2i32, -1, 0, 3].is_sorted_by_key(|n| n.abs()));
31 = help: add #![feature(is_sorted)] to the crate attributes to enable
33 error: aborting due to 4 previous errors
35 For more information about this error, try `rustc --explain E0658`.