[INFO] cloning repository https://github.com/helgardferreira/rust_collection_exercises
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/helgardferreira/rust_collection_exercises" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhelgardferreira%2Frust_collection_exercises", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhelgardferreira%2Frust_collection_exercises'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e33b297dc7e00c78931cfc140d062aad4baeaaf3
[INFO] testing helgardferreira/rust_collection_exercises against beta-2026-04-21 for beta-1.96-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhelgardferreira%2Frust_collection_exercises" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/helgardferreira/rust_collection_exercises
[INFO] finished tweaking git repo https://github.com/helgardferreira/rust_collection_exercises
[INFO] tweaked toml for git repo https://github.com/helgardferreira/rust_collection_exercises written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/helgardferreira/rust_collection_exercises on toolchain beta-2026-04-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/helgardferreira/rust_collection_exercises already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1728c9b633c76054985da8507f5e24a70fc9376241aad9c5a53c2addaa83d224
[INFO] running `Command { std: "docker" "start" "-a" "1728c9b633c76054985da8507f5e24a70fc9376241aad9c5a53c2addaa83d224", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1728c9b633c76054985da8507f5e24a70fc9376241aad9c5a53c2addaa83d224", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1728c9b633c76054985da8507f5e24a70fc9376241aad9c5a53c2addaa83d224", kill_on_drop: false }`
[INFO] [stdout] 1728c9b633c76054985da8507f5e24a70fc9376241aad9c5a53c2addaa83d224
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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" "RUSTDOCFLAGS=--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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5018af07e844ac276f6581e3490ee137575e831e217332380689c7647ac3c65e
[INFO] running `Command { std: "docker" "start" "-a" "5018af07e844ac276f6581e3490ee137575e831e217332380689c7647ac3c65e", kill_on_drop: false }`
[INFO] [stderr]    Compiling collection_exercises v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around index expression
[INFO] [stdout]   --> src/lib.rs:16:60
[INFO] [stdout]    |
[INFO] [stdout] 16 |             let m_nums = (&nums[(nums_len / 2) - 1], &nums[(nums_len / 2)]);
[INFO] [stdout]    |                                                            ^            ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 16 -             let m_nums = (&nums[(nums_len / 2) - 1], &nums[(nums_len / 2)]);
[INFO] [stdout] 16 +             let m_nums = (&nums[(nums_len / 2) - 1], &nums[nums_len / 2 ]);
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.56s
[INFO] running `Command { std: "docker" "inspect" "5018af07e844ac276f6581e3490ee137575e831e217332380689c7647ac3c65e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5018af07e844ac276f6581e3490ee137575e831e217332380689c7647ac3c65e", kill_on_drop: false }`
[INFO] [stdout] 5018af07e844ac276f6581e3490ee137575e831e217332380689c7647ac3c65e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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" "RUSTDOCFLAGS=--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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6fac66561c84bd5a42936febe826cee1848f718f22679d3ca26bb2b37fb89111
[INFO] running `Command { std: "docker" "start" "-a" "6fac66561c84bd5a42936febe826cee1848f718f22679d3ca26bb2b37fb89111", kill_on_drop: false }`
[INFO] [stdout] warning: unnecessary parentheses around index expression
[INFO] [stdout]   --> src/lib.rs:16:60
[INFO] [stdout]    |
[INFO] [stdout] 16 |             let m_nums = (&nums[(nums_len / 2) - 1], &nums[(nums_len / 2)]);
[INFO] [stdout]    |                                                            ^            ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 16 -             let m_nums = (&nums[(nums_len / 2) - 1], &nums[(nums_len / 2)]);
[INFO] [stdout] 16 +             let m_nums = (&nums[(nums_len / 2) - 1], &nums[nums_len / 2 ]);
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling collection_exercises v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around index expression
[INFO] [stdout]   --> src/lib.rs:16:60
[INFO] [stdout]    |
[INFO] [stdout] 16 |             let m_nums = (&nums[(nums_len / 2) - 1], &nums[(nums_len / 2)]);
[INFO] [stdout]    |                                                            ^            ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 16 -             let m_nums = (&nums[(nums_len / 2) - 1], &nums[(nums_len / 2)]);
[INFO] [stdout] 16 +             let m_nums = (&nums[(nums_len / 2) - 1], &nums[nums_len / 2 ]);
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.38s
[INFO] running `Command { std: "docker" "inspect" "6fac66561c84bd5a42936febe826cee1848f718f22679d3ca26bb2b37fb89111", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6fac66561c84bd5a42936febe826cee1848f718f22679d3ca26bb2b37fb89111", kill_on_drop: false }`
[INFO] [stdout] 6fac66561c84bd5a42936febe826cee1848f718f22679d3ca26bb2b37fb89111
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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" "RUSTDOCFLAGS=--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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 00a1c7c10d402eb400a81b754cb108bc72b362eb24a2e7148a38d3893e5d0cfd
[INFO] running `Command { std: "docker" "start" "-a" "00a1c7c10d402eb400a81b754cb108bc72b362eb24a2e7148a38d3893e5d0cfd", kill_on_drop: false }`
[INFO] [stderr] warning: unnecessary parentheses around index expression
[INFO] [stdout] 
[INFO] [stderr]   --> src/lib.rs:16:60
[INFO] [stdout] running 0 tests
[INFO] [stderr]    |
[INFO] [stdout] 
[INFO] [stderr] 16 |             let m_nums = (&nums[(nums_len / 2) - 1], &nums[(nums_len / 2)]);
[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]    |
[INFO] [stdout] 
[INFO] [stderr]    = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] running 0 tests
[INFO] [stderr] help: remove these parentheses
[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] 16 -             let m_nums = (&nums[(nums_len / 2) - 1], &nums[(nums_len / 2)]);
[INFO] [stdout] 
[INFO] [stderr] 16 +             let m_nums = (&nums[(nums_len / 2) - 1], &nums[nums_len / 2 ]);
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: `collection_exercises` (lib) generated 1 warning (run `cargo fix --lib -p collection_exercises` to apply 1 suggestion)
[INFO] [stderr] warning: `collection_exercises` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.26s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/collection_exercises-baf0e11cdaca8efd)
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/collection_exercises-76cf8613ecad5680)
[INFO] [stderr]    Doc-tests collection_exercises
[INFO] [stderr] warning: unnecessary parentheses around index expression
[INFO] [stderr]   --> src/lib.rs:16:60
[INFO] [stderr]    |
[INFO] [stderr] 16 |             let m_nums = (&nums[(nums_len / 2) - 1], &nums[(nums_len / 2)]);
[INFO] [stderr]    |                                                            ^            ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 16 -             let m_nums = (&nums[(nums_len / 2) - 1], &nums[(nums_len / 2)]);
[INFO] [stderr] 16 +             let m_nums = (&nums[(nums_len / 2) - 1], &nums[nums_len / 2 ]);
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[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" "00a1c7c10d402eb400a81b754cb108bc72b362eb24a2e7148a38d3893e5d0cfd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "00a1c7c10d402eb400a81b754cb108bc72b362eb24a2e7148a38d3893e5d0cfd", kill_on_drop: false }`
[INFO] [stdout] 00a1c7c10d402eb400a81b754cb108bc72b362eb24a2e7148a38d3893e5d0cfd
