[INFO] cloning repository https://github.com/deepgreenAN/programmig-contest-challenge-book
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/deepgreenAN/programmig-contest-challenge-book" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FdeepgreenAN%2Fprogrammig-contest-challenge-book", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FdeepgreenAN%2Fprogrammig-contest-challenge-book'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ff4f3b15b257f95afc22f29bc92edabb97eac64e
[INFO] checking deepgreenAN/programmig-contest-challenge-book against master#667247db71ea18c4130dd018d060e7f09d589490 for pr-140824
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FdeepgreenAN%2Fprogrammig-contest-challenge-book" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/deepgreenAN/programmig-contest-challenge-book on toolchain 667247db71ea18c4130dd018d060e7f09d589490
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+667247db71ea18c4130dd018d060e7f09d589490" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/deepgreenAN/programmig-contest-challenge-book
[INFO] finished tweaking git repo https://github.com/deepgreenAN/programmig-contest-challenge-book
[INFO] tweaked toml for git repo https://github.com/deepgreenAN/programmig-contest-challenge-book written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/deepgreenAN/programmig-contest-challenge-book 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" "+667247db71ea18c4130dd018d060e7f09d589490" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+667247db71ea18c4130dd018d060e7f09d589490" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7178125ed189c534922a26a75ce96ba36a2196067de295f168511e439682ad9c
[INFO] running `Command { std: "docker" "start" "-a" "7178125ed189c534922a26a75ce96ba36a2196067de295f168511e439682ad9c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7178125ed189c534922a26a75ce96ba36a2196067de295f168511e439682ad9c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7178125ed189c534922a26a75ce96ba36a2196067de295f168511e439682ad9c", kill_on_drop: false }`
[INFO] [stdout] 7178125ed189c534922a26a75ce96ba36a2196067de295f168511e439682ad9c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+667247db71ea18c4130dd018d060e7f09d589490" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 57731b0197fe8cfdc27214f3a2d91f67528e938dc94f98427e139e8bcb862977
[INFO] running `Command { std: "docker" "start" "-a" "57731b0197fe8cfdc27214f3a2d91f67528e938dc94f98427e139e8bcb862977", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.63
[INFO] [stderr]    Compiling quote v1.0.29
[INFO] [stderr]    Compiling unicode-ident v1.0.10
[INFO] [stderr]    Compiling ident_case v1.0.1
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]    Compiling strsim v0.10.0
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]     Checking syn v2.0.23
[INFO] [stderr]     Checking float-cmp v0.9.0
[INFO] [stderr]     Checking darling_core v0.20.1
[INFO] [stderr]    Compiling darling_macro v0.20.1
[INFO] [stderr]    Compiling darling v0.20.1
[INFO] [stderr]     Checking challenge_book_macros v0.1.0 (/opt/rustwide/workdir/challenge_book_macros)
[INFO] [stderr]     Checking challenge_book v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: methods `max`, `min`, and `sort_` are never used
[INFO] [stdout]   --> src/vec_ext/pord_vec_ext.rs:6:8
[INFO] [stdout]    |
[INFO] [stdout] 4  | pub trait POrdVecExt<T: PartialOrd> {
[INFO] [stdout]    |           ---------- methods in this trait
[INFO] [stdout] 5  |     /// Max
[INFO] [stdout] 6  |     fn max(&self) -> Option<&T>;
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 7  |     /// Min
[INFO] [stdout] 8  |     fn min(&self) -> Option<&T>;
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 9  |     /// sort
[INFO] [stdout] 10 |     fn sort_(&mut self);
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 13.79s
[INFO] running `Command { std: "docker" "inspect" "57731b0197fe8cfdc27214f3a2d91f67528e938dc94f98427e139e8bcb862977", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "57731b0197fe8cfdc27214f3a2d91f67528e938dc94f98427e139e8bcb862977", kill_on_drop: false }`
[INFO] [stdout] 57731b0197fe8cfdc27214f3a2d91f67528e938dc94f98427e139e8bcb862977