1 error: use of unstable library feature 'test': `bench` is a part of custom test frameworks which are unstable
7 = note: `#[deny(soft_unstable)]` on by default
8 = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
9 = note: for more information, see issue #64266 <https://github.com/rust-lang/rust/issues/64266>
11 error: use of unstable library feature 'test': `bench` is a part of custom test frameworks which are unstable
17 = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
18 = note: for more information, see issue #64266 <https://github.com/rust-lang/rust/issues/64266>
20 error: aborting due to 2 previous errors