[INFO] cloning repository https://github.com/ZapAnton/sortings
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ZapAnton/sortings" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FZapAnton%2Fsortings", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FZapAnton%2Fsortings'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ee837d5f10470fa2c9eabbb8dea73ab98436830e
[INFO] testing ZapAnton/sortings against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FZapAnton%2Fsortings" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ZapAnton/sortings on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ZapAnton/sortings
[INFO] finished tweaking git repo https://github.com/ZapAnton/sortings
[INFO] tweaked toml for git repo https://github.com/ZapAnton/sortings written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/ZapAnton/sortings already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] a7e79957752e966c6a7901677fb3e1acf0ed29577332461d5ae127426b0df5c5
[INFO] running `Command { std: "docker" "start" "-a" "a7e79957752e966c6a7901677fb3e1acf0ed29577332461d5ae127426b0df5c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a7e79957752e966c6a7901677fb3e1acf0ed29577332461d5ae127426b0df5c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a7e79957752e966c6a7901677fb3e1acf0ed29577332461d5ae127426b0df5c5", kill_on_drop: false }`
[INFO] [stdout] a7e79957752e966c6a7901677fb3e1acf0ed29577332461d5ae127426b0df5c5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e562b338ac916404511c060de4de3176eddf5f39d110e6d626e417974b6c3f2b
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "e562b338ac916404511c060de4de3176eddf5f39d110e6d626e417974b6c3f2b", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.39
[INFO] [stderr]    Compiling rand v0.4.2
[INFO] [stderr]    Compiling sortings v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition.
[INFO] [stdout]  --> src/sort.rs:2:20
[INFO] [stdout]   |
[INFO] [stdout] 2 |     fn sort(&self, &mut [i32], &Box<Fn(i32, i32) -> bool>);
[INFO] [stdout]   |                    ^^^^^^^^^^ help: try naming the parameter or explicitly ignoring it: `_: &mut [i32]`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(anonymous_parameters)]` on by default
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition.
[INFO] [stdout]  --> src/sort.rs:2:32
[INFO] [stdout]   |
[INFO] [stdout] 2 |     fn sort(&self, &mut [i32], &Box<Fn(i32, i32) -> bool>);
[INFO] [stdout]   |                                ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try naming the parameter or explicitly ignoring it: `_: &Box<Fn(i32, i32) -> bool>`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/sort.rs:2:37
[INFO] [stdout]   |
[INFO] [stdout] 2 |     fn sort(&self, &mut [i32], &Box<Fn(i32, i32) -> bool>);
[INFO] [stdout]   |                                     ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(i32, i32) -> bool`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]   = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/sort.rs:11:53
[INFO] [stdout]    |
[INFO] [stdout] 11 |     fn sort(&self, slice: &mut [i32], compare: &Box<Fn(i32, i32) -> bool>) {
[INFO] [stdout]    |                                                     ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(i32, i32) -> bool`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/sort.rs:23:53
[INFO] [stdout]    |
[INFO] [stdout] 23 |     fn sort(&self, slice: &mut [i32], compare: &Box<Fn(i32, i32) -> bool>) {
[INFO] [stdout]    |                                                     ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(i32, i32) -> bool`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/sort.rs:41:53
[INFO] [stdout]    |
[INFO] [stdout] 41 |     fn sort(&self, slice: &mut [i32], compare: &Box<Fn(i32, i32) -> bool>) {
[INFO] [stdout]    |                                                     ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(i32, i32) -> bool`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/sort.rs:58:53
[INFO] [stdout]    |
[INFO] [stdout] 58 | fn partition_slice(slice: &mut [i32], compare: &Box<Fn(i32, i32) -> bool>) -> usize {
[INFO] [stdout]    |                                                     ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(i32, i32) -> bool`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/sort.rs:81:53
[INFO] [stdout]    |
[INFO] [stdout] 81 |     fn sort(&self, slice: &mut [i32], compare: &Box<Fn(i32, i32) -> bool>) {
[INFO] [stdout]    |                                                     ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(i32, i32) -> bool`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/utils.rs:38:43
[INFO] [stdout]    |
[INFO] [stdout] 38 | pub fn choose_comparison_closure() -> Box<Fn(i32, i32) -> bool> {
[INFO] [stdout]    |                                           ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(i32, i32) -> bool`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/utils.rs:61:39
[INFO] [stdout]    |
[INFO] [stdout] 61 | pub fn choose_sorting_method() -> Box<SortSlice> {
[INFO] [stdout]    |                                       ^^^^^^^^^ help: use `dyn`: `dyn SortSlice`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/utils.rs:73:44
[INFO] [stdout]    |
[INFO] [stdout] 73 |         1 => Box::new(BubbleSorter) as Box<SortSlice>,
[INFO] [stdout]    |                                            ^^^^^^^^^ help: use `dyn`: `dyn SortSlice`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/utils.rs:74:44
[INFO] [stdout]    |
[INFO] [stdout] 74 |         2 => Box::new(InsertSorter) as Box<SortSlice>,
[INFO] [stdout]    |                                            ^^^^^^^^^ help: use `dyn`: `dyn SortSlice`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/utils.rs:75:43
[INFO] [stdout]    |
[INFO] [stdout] 75 |         3 => Box::new(QuickSorter) as Box<SortSlice>,
[INFO] [stdout]    |                                           ^^^^^^^^^ help: use `dyn`: `dyn SortSlice`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/utils.rs:76:47
[INFO] [stdout]    |
[INFO] [stdout] 76 |         4 => Box::new(SelectionSorter) as Box<SortSlice>,
[INFO] [stdout]    |                                               ^^^^^^^^^ help: use `dyn`: `dyn SortSlice`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/utils.rs:79:42
[INFO] [stdout]    |
[INFO] [stdout] 79 |             Box::new(QuickSorter) as Box<SortSlice>
[INFO] [stdout]    |                                          ^^^^^^^^^ help: use `dyn`: `dyn SortSlice`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 15 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.39s
[INFO] running `Command { std: "docker" "inspect" "e562b338ac916404511c060de4de3176eddf5f39d110e6d626e417974b6c3f2b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e562b338ac916404511c060de4de3176eddf5f39d110e6d626e417974b6c3f2b", kill_on_drop: false }`
[INFO] [stdout] e562b338ac916404511c060de4de3176eddf5f39d110e6d626e417974b6c3f2b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 18e9b0473ba4792b522a044096ea3cab160019084619587ebe8c563482ee84eb
[INFO] running `Command { std: "docker" "start" "-a" "18e9b0473ba4792b522a044096ea3cab160019084619587ebe8c563482ee84eb", kill_on_drop: false }`
[INFO] [stderr]    Compiling sortings v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition.
[INFO] [stdout]  --> src/sort.rs:2:20
[INFO] [stdout]   |
[INFO] [stdout] 2 |     fn sort(&self, &mut [i32], &Box<Fn(i32, i32) -> bool>);
[INFO] [stdout]   |                    ^^^^^^^^^^ help: try naming the parameter or explicitly ignoring it: `_: &mut [i32]`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(anonymous_parameters)]` on by default
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition.
[INFO] [stdout]  --> src/sort.rs:2:32
[INFO] [stdout]   |
[INFO] [stdout] 2 |     fn sort(&self, &mut [i32], &Box<Fn(i32, i32) -> bool>);
[INFO] [stdout]   |                                ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try naming the parameter or explicitly ignoring it: `_: &Box<Fn(i32, i32) -> bool>`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/sort.rs:2:37
[INFO] [stdout]   |
[INFO] [stdout] 2 |     fn sort(&self, &mut [i32], &Box<Fn(i32, i32) -> bool>);
[INFO] [stdout]   |                                     ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(i32, i32) -> bool`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]   = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/sort.rs:11:53
[INFO] [stdout]    |
[INFO] [stdout] 11 |     fn sort(&self, slice: &mut [i32], compare: &Box<Fn(i32, i32) -> bool>) {
[INFO] [stdout]    |                                                     ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(i32, i32) -> bool`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/sort.rs:23:53
[INFO] [stdout]    |
[INFO] [stdout] 23 |     fn sort(&self, slice: &mut [i32], compare: &Box<Fn(i32, i32) -> bool>) {
[INFO] [stdout]    |                                                     ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(i32, i32) -> bool`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/sort.rs:41:53
[INFO] [stdout]    |
[INFO] [stdout] 41 |     fn sort(&self, slice: &mut [i32], compare: &Box<Fn(i32, i32) -> bool>) {
[INFO] [stdout]    |                                                     ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(i32, i32) -> bool`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/sort.rs:58:53
[INFO] [stdout]    |
[INFO] [stdout] 58 | fn partition_slice(slice: &mut [i32], compare: &Box<Fn(i32, i32) -> bool>) -> usize {
[INFO] [stdout]    |                                                     ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(i32, i32) -> bool`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/sort.rs:81:53
[INFO] [stdout]    |
[INFO] [stdout] 81 |     fn sort(&self, slice: &mut [i32], compare: &Box<Fn(i32, i32) -> bool>) {
[INFO] [stdout]    |                                                     ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(i32, i32) -> bool`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/sort.rs:111:58
[INFO] [stdout]     |
[INFO] [stdout] 111 |         let compare_less = Box::new(|x, y| x > y) as Box<Fn(i32, i32) -> bool>;
[INFO] [stdout]     |                                                          ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(i32, i32) -> bool`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/sort.rs:113:61
[INFO] [stdout]     |
[INFO] [stdout] 113 |         let compare_greater = Box::new(|x, y| x < y) as Box<Fn(i32, i32) -> bool>;
[INFO] [stdout]     |                                                             ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(i32, i32) -> bool`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/sort.rs:132:30
[INFO] [stdout]     |
[INFO] [stdout] 132 |         let sorters: Vec<Box<SortSlice>> = vec![
[INFO] [stdout]     |                              ^^^^^^^^^ help: use `dyn`: `dyn SortSlice`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/sort.rs:139:26
[INFO] [stdout]     |
[INFO] [stdout] 139 |         let compare: Box<Fn(i32, i32) -> bool> = Box::new(|x, y| x < y);
[INFO] [stdout]     |                          ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(i32, i32) -> bool`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/utils.rs:38:43
[INFO] [stdout]    |
[INFO] [stdout] 38 | pub fn choose_comparison_closure() -> Box<Fn(i32, i32) -> bool> {
[INFO] [stdout]    |                                           ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(i32, i32) -> bool`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/utils.rs:61:39
[INFO] [stdout]    |
[INFO] [stdout] 61 | pub fn choose_sorting_method() -> Box<SortSlice> {
[INFO] [stdout]    |                                       ^^^^^^^^^ help: use `dyn`: `dyn SortSlice`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/utils.rs:73:44
[INFO] [stdout]    |
[INFO] [stdout] 73 |         1 => Box::new(BubbleSorter) as Box<SortSlice>,
[INFO] [stdout]    |                                            ^^^^^^^^^ help: use `dyn`: `dyn SortSlice`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/utils.rs:74:44
[INFO] [stdout]    |
[INFO] [stdout] 74 |         2 => Box::new(InsertSorter) as Box<SortSlice>,
[INFO] [stdout]    |                                            ^^^^^^^^^ help: use `dyn`: `dyn SortSlice`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/utils.rs:75:43
[INFO] [stdout]    |
[INFO] [stdout] 75 |         3 => Box::new(QuickSorter) as Box<SortSlice>,
[INFO] [stdout]    |                                           ^^^^^^^^^ help: use `dyn`: `dyn SortSlice`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/utils.rs:76:47
[INFO] [stdout]    |
[INFO] [stdout] 76 |         4 => Box::new(SelectionSorter) as Box<SortSlice>,
[INFO] [stdout]    |                                               ^^^^^^^^^ help: use `dyn`: `dyn SortSlice`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/utils.rs:79:42
[INFO] [stdout]    |
[INFO] [stdout] 79 |             Box::new(QuickSorter) as Box<SortSlice>
[INFO] [stdout]    |                                          ^^^^^^^^^ help: use `dyn`: `dyn SortSlice`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 19 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.02s
[INFO] running `Command { std: "docker" "inspect" "18e9b0473ba4792b522a044096ea3cab160019084619587ebe8c563482ee84eb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "18e9b0473ba4792b522a044096ea3cab160019084619587ebe8c563482ee84eb", kill_on_drop: false }`
[INFO] [stdout] 18e9b0473ba4792b522a044096ea3cab160019084619587ebe8c563482ee84eb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 4b8cbd0586a8610e68284578da980ab09084f1794731b4f35eeea54052ee9d18
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "4b8cbd0586a8610e68284578da980ab09084f1794731b4f35eeea54052ee9d18", kill_on_drop: false }`
[INFO] [stderr] warning: anonymous parameters are deprecated and will be removed in the next edition.
[INFO] [stderr]  --> src/sort.rs:2:20
[INFO] [stderr]   |
[INFO] [stderr] 2 |     fn sort(&self, &mut [i32], &Box<Fn(i32, i32) -> bool>);
[INFO] [stderr]   |                    ^^^^^^^^^^ help: try naming the parameter or explicitly ignoring it: `_: &mut [i32]`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(anonymous_parameters)]` on by default
[INFO] [stderr]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stderr]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stderr] 
[INFO] [stderr] warning: anonymous parameters are deprecated and will be removed in the next edition.
[INFO] [stderr]  --> src/sort.rs:2:32
[INFO] [stderr]   |
[INFO] [stderr] 2 |     fn sort(&self, &mut [i32], &Box<Fn(i32, i32) -> bool>);
[INFO] [stderr]   |                                ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try naming the parameter or explicitly ignoring it: `_: &Box<Fn(i32, i32) -> bool>`
[INFO] [stderr]   |
[INFO] [stderr]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stderr]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/sort.rs:2:37
[INFO] [stderr]   |
[INFO] [stderr] 2 |     fn sort(&self, &mut [i32], &Box<Fn(i32, i32) -> bool>);
[INFO] [stderr]   |                                     ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(i32, i32) -> bool`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]   = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/sort.rs:11:53
[INFO] [stderr]    |
[INFO] [stderr] 11 |     fn sort(&self, slice: &mut [i32], compare: &Box<Fn(i32, i32) -> bool>) {
[INFO] [stderr]    |                                                     ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(i32, i32) -> bool`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/sort.rs:23:53
[INFO] [stderr]    |
[INFO] [stderr] 23 |     fn sort(&self, slice: &mut [i32], compare: &Box<Fn(i32, i32) -> bool>) {
[INFO] [stderr]    |                                                     ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(i32, i32) -> bool`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/sort.rs:41:53
[INFO] [stderr]    |
[INFO] [stderr] 41 |     fn sort(&self, slice: &mut [i32], compare: &Box<Fn(i32, i32) -> bool>) {
[INFO] [stderr]    |                                                     ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(i32, i32) -> bool`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/sort.rs:58:53
[INFO] [stderr]    |
[INFO] [stderr] 58 | fn partition_slice(slice: &mut [i32], compare: &Box<Fn(i32, i32) -> bool>) -> usize {
[INFO] [stderr]    |                                                     ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(i32, i32) -> bool`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/sort.rs:81:53
[INFO] [stderr]    |
[INFO] [stderr] 81 |     fn sort(&self, slice: &mut [i32], compare: &Box<Fn(i32, i32) -> bool>) {
[INFO] [stderr]    |                                                     ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(i32, i32) -> bool`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/sort.rs:111:58
[INFO] [stderr]     |
[INFO] [stderr] 111 |         let compare_less = Box::new(|x, y| x > y) as Box<Fn(i32, i32) -> bool>;
[INFO] [stderr]     |                                                          ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(i32, i32) -> bool`
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/sort.rs:113:61
[INFO] [stderr]     |
[INFO] [stderr] 113 |         let compare_greater = Box::new(|x, y| x < y) as Box<Fn(i32, i32) -> bool>;
[INFO] [stderr]     |                                                             ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(i32, i32) -> bool`
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/sort.rs:132:30
[INFO] [stderr]     |
[INFO] [stderr] 132 |         let sorters: Vec<Box<SortSlice>> = vec![
[INFO] [stderr]     |                              ^^^^^^^^^ help: use `dyn`: `dyn SortSlice`
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/sort.rs:139:26
[INFO] [stderr]     |
[INFO] [stderr] 139 |         let compare: Box<Fn(i32, i32) -> bool> = Box::new(|x, y| x < y);
[INFO] [stderr]     |                          ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(i32, i32) -> bool`
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/utils.rs:38:43
[INFO] [stderr]    |
[INFO] [stderr] 38 | pub fn choose_comparison_closure() -> Box<Fn(i32, i32) -> bool> {
[INFO] [stderr]    |                                           ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(i32, i32) -> bool`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/utils.rs:61:39
[INFO] [stderr]    |
[INFO] [stderr] 61 | pub fn choose_sorting_method() -> Box<SortSlice> {
[INFO] [stderr]    |                                       ^^^^^^^^^ help: use `dyn`: `dyn SortSlice`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/utils.rs:73:44
[INFO] [stderr]    |
[INFO] [stderr] 73 |         1 => Box::new(BubbleSorter) as Box<SortSlice>,
[INFO] [stderr]    |                                            ^^^^^^^^^ help: use `dyn`: `dyn SortSlice`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/utils.rs:74:44
[INFO] [stderr]    |
[INFO] [stderr] 74 |         2 => Box::new(InsertSorter) as Box<SortSlice>,
[INFO] [stderr]    |                                            ^^^^^^^^^ help: use `dyn`: `dyn SortSlice`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/utils.rs:75:43
[INFO] [stderr]    |
[INFO] [stderr] 75 |         3 => Box::new(QuickSorter) as Box<SortSlice>,
[INFO] [stderr]    |                                           ^^^^^^^^^ help: use `dyn`: `dyn SortSlice`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/utils.rs:76:47
[INFO] [stderr]    |
[INFO] [stderr] 76 |         4 => Box::new(SelectionSorter) as Box<SortSlice>,
[INFO] [stderr]    |                                               ^^^^^^^^^ help: use `dyn`: `dyn SortSlice`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/utils.rs:79:42
[INFO] [stderr]    |
[INFO] [stderr] 79 |             Box::new(QuickSorter) as Box<SortSlice>
[INFO] [stderr]    |                                          ^^^^^^^^^ help: use `dyn`: `dyn SortSlice`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: `sortings` (bin "sortings" test) generated 19 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/sortings-624767bc976f15cb)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test sort::tests::general_test ... ok
[INFO] [stdout] test sort::tests::selection_sort_test ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "4b8cbd0586a8610e68284578da980ab09084f1794731b4f35eeea54052ee9d18", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4b8cbd0586a8610e68284578da980ab09084f1794731b4f35eeea54052ee9d18", kill_on_drop: false }`
[INFO] [stdout] 4b8cbd0586a8610e68284578da980ab09084f1794731b4f35eeea54052ee9d18