[INFO] cloning repository https://github.com/Posich/sorting
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Posich/sorting" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPosich%2Fsorting", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPosich%2Fsorting'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 132d19d25b981d5253a3e0aa9d864e8cc214aa30
[INFO] testing Posich/sorting against beta-2022-02-22 for beta-1.60-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPosich%2Fsorting" "/workspace/builds/worker-13/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-13/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Posich/sorting on toolchain beta-2022-02-22
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Posich/sorting
[INFO] finished tweaking git repo https://github.com/Posich/sorting
[INFO] tweaked toml for git repo https://github.com/Posich/sorting written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate git repo https://github.com/Posich/sorting already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d7dfd0a2c4ffe6a12a4723bca36fe3fac13ae2209788cc88c3a4f87ba3b47d6e
[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" "d7dfd0a2c4ffe6a12a4723bca36fe3fac13ae2209788cc88c3a4f87ba3b47d6e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d7dfd0a2c4ffe6a12a4723bca36fe3fac13ae2209788cc88c3a4f87ba3b47d6e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d7dfd0a2c4ffe6a12a4723bca36fe3fac13ae2209788cc88c3a4f87ba3b47d6e", kill_on_drop: false }`
[INFO] [stdout] d7dfd0a2c4ffe6a12a4723bca36fe3fac13ae2209788cc88c3a4f87ba3b47d6e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 38eaa8f61a930b69f83b421bbee90419448fd27679a447d7d2d63b5c33bb721f
[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" "38eaa8f61a930b69f83b421bbee90419448fd27679a447d7d2d63b5c33bb721f", kill_on_drop: false }`
[INFO] [stderr]    Compiling sorting v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/heap_sort.rs:169:13
[INFO] [stdout]     |
[INFO] [stdout] 169 |             &mut self.build_rec(*val);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 169 |             let _ = &mut self.build_rec(*val);
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/heap_sort.rs:174:9
[INFO] [stdout]     |
[INFO] [stdout] 174 |         &mut self.values.push_back(elem.value);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 174 |         let _ = &mut self.values.push_back(elem.value);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/heap_sort.rs:182:13
[INFO] [stdout]     |
[INFO] [stdout] 182 |             &mut self.build_rec(*val);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 182 |             let _ = &mut self.build_rec(*val);
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:77:59
[INFO] [stdout]    |
[INFO] [stdout] 77 |     let mut it = Box::new(col.clone().into_iter()) as Box<Iterator<Item=T>>;
[INFO] [stdout]    |                                                           ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 77 -     let mut it = Box::new(col.clone().into_iter()) as Box<Iterator<Item=T>>;
[INFO] [stdout] 77 +     let mut it = Box::new(col.clone().into_iter()) as Box<dyn Iterator<Item=T>>;
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `IntoIterator`
[INFO] [stdout]  --> src/main.rs:8:27
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::iter::{Iterator, IntoIterator};
[INFO] [stdout]   |                           ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.68s
[INFO] running `Command { std: "docker" "inspect" "38eaa8f61a930b69f83b421bbee90419448fd27679a447d7d2d63b5c33bb721f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "38eaa8f61a930b69f83b421bbee90419448fd27679a447d7d2d63b5c33bb721f", kill_on_drop: false }`
[INFO] [stdout] 38eaa8f61a930b69f83b421bbee90419448fd27679a447d7d2d63b5c33bb721f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0930d51d22fcd09088597d8710052c5c30a6c85dba6a3c8fff032cf582419b38
[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" "0930d51d22fcd09088597d8710052c5c30a6c85dba6a3c8fff032cf582419b38", kill_on_drop: false }`
[INFO] [stderr]    Compiling sorting v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/heap_sort.rs:169:13
[INFO] [stdout]     |
[INFO] [stdout] 169 |             &mut self.build_rec(*val);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 169 |             let _ = &mut self.build_rec(*val);
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/heap_sort.rs:174:9
[INFO] [stdout]     |
[INFO] [stdout] 174 |         &mut self.values.push_back(elem.value);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 174 |         let _ = &mut self.values.push_back(elem.value);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/heap_sort.rs:182:13
[INFO] [stdout]     |
[INFO] [stdout] 182 |             &mut self.build_rec(*val);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 182 |             let _ = &mut self.build_rec(*val);
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/heap_sort.rs:169:13
[INFO] [stdout]     |
[INFO] [stdout] 169 |             &mut self.build_rec(*val);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 169 |             let _ = &mut self.build_rec(*val);
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/heap_sort.rs:174:9
[INFO] [stdout]     |
[INFO] [stdout] 174 |         &mut self.values.push_back(elem.value);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 174 |         let _ = &mut self.values.push_back(elem.value);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/heap_sort.rs:182:13
[INFO] [stdout]     |
[INFO] [stdout] 182 |             &mut self.build_rec(*val);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 182 |             let _ = &mut self.build_rec(*val);
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:77:59
[INFO] [stdout]    |
[INFO] [stdout] 77 |     let mut it = Box::new(col.clone().into_iter()) as Box<Iterator<Item=T>>;
[INFO] [stdout]    |                                                           ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 77 -     let mut it = Box::new(col.clone().into_iter()) as Box<Iterator<Item=T>>;
[INFO] [stdout] 77 +     let mut it = Box::new(col.clone().into_iter()) as Box<dyn Iterator<Item=T>>;
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `IntoIterator`
[INFO] [stdout]  --> src/main.rs:8:27
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::iter::{Iterator, IntoIterator};
[INFO] [stdout]   |                           ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.19s
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "0930d51d22fcd09088597d8710052c5c30a6c85dba6a3c8fff032cf582419b38", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0930d51d22fcd09088597d8710052c5c30a6c85dba6a3c8fff032cf582419b38", kill_on_drop: false }`
[INFO] [stdout] 0930d51d22fcd09088597d8710052c5c30a6c85dba6a3c8fff032cf582419b38
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 3e074ddc35e9f26d0f95164e89f016f1a6dcffdcef2c3495c384aa770a7ea69b
[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" "3e074ddc35e9f26d0f95164e89f016f1a6dcffdcef2c3495c384aa770a7ea69b", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr] warning: unused borrow that must be used
[INFO] [stdout] running 0 tests
[INFO] [stderr]    --> src/heap_sort.rs:169:13
[INFO] [stdout] 
[INFO] [stderr]     |
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr] 169 |             &mut self.build_rec(*val);
[INFO] [stdout] 
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout] 
[INFO] [stderr]     |
[INFO] [stdout] running 0 tests
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] 
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr]     |
[INFO] [stdout] 
[INFO] [stderr] 169 |             let _ = &mut self.build_rec(*val);
[INFO] [stderr]     |             +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused borrow that must be used
[INFO] [stderr]    --> src/heap_sort.rs:174:9
[INFO] [stderr]     |
[INFO] [stderr] 174 |         &mut self.values.push_back(elem.value);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 174 |         let _ = &mut self.values.push_back(elem.value);
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused borrow that must be used
[INFO] [stderr]    --> src/heap_sort.rs:182:13
[INFO] [stderr]     |
[INFO] [stderr] 182 |             &mut self.build_rec(*val);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 182 |             let _ = &mut self.build_rec(*val);
[INFO] [stderr]     |             +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: `sorting` (lib) generated 3 warnings
[INFO] [stderr] warning: `sorting` (lib test) generated 3 warnings (3 duplicates)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:77:59
[INFO] [stderr]    |
[INFO] [stderr] 77 |     let mut it = Box::new(col.clone().into_iter()) as Box<Iterator<Item=T>>;
[INFO] [stderr]    |                                                           ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 77 -     let mut it = Box::new(col.clone().into_iter()) as Box<Iterator<Item=T>>;
[INFO] [stderr] 77 +     let mut it = Box::new(col.clone().into_iter()) as Box<dyn Iterator<Item=T>>;
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `IntoIterator`
[INFO] [stderr]  --> src/main.rs:8:27
[INFO] [stderr]   |
[INFO] [stderr] 8 | use std::iter::{Iterator, IntoIterator};
[INFO] [stderr]   |                           ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `sorting` (bin "sorting" test) generated 2 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/sorting-2001d97b0fb48d71)
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/sorting-54c91367aacde56e)
[INFO] [stderr]    Doc-tests sorting
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "3e074ddc35e9f26d0f95164e89f016f1a6dcffdcef2c3495c384aa770a7ea69b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3e074ddc35e9f26d0f95164e89f016f1a6dcffdcef2c3495c384aa770a7ea69b", kill_on_drop: false }`
[INFO] [stdout] 3e074ddc35e9f26d0f95164e89f016f1a6dcffdcef2c3495c384aa770a7ea69b