[INFO] cloning repository https://github.com/ReeceMcMillin/Rust-BST
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ReeceMcMillin/Rust-BST" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FReeceMcMillin%2FRust-BST", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FReeceMcMillin%2FRust-BST'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8c93b2deaafb326fb87b8d51fca4a97abc454628
[INFO] checking ReeceMcMillin/Rust-BST against try#6f8a6450478f69b8510c8976ab6c2a70b3b0e47c for pr-84920
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FReeceMcMillin%2FRust-BST" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ReeceMcMillin/Rust-BST on toolchain 6f8a6450478f69b8510c8976ab6c2a70b3b0e47c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ReeceMcMillin/Rust-BST
[INFO] finished tweaking git repo https://github.com/ReeceMcMillin/Rust-BST
[INFO] tweaked toml for git repo https://github.com/ReeceMcMillin/Rust-BST written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/ReeceMcMillin/Rust-BST already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1e24e1415f340e7d470282a4cc9177409a5d49bec6532d79fc441271eff2be51
[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" "1e24e1415f340e7d470282a4cc9177409a5d49bec6532d79fc441271eff2be51", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1e24e1415f340e7d470282a4cc9177409a5d49bec6532d79fc441271eff2be51", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1e24e1415f340e7d470282a4cc9177409a5d49bec6532d79fc441271eff2be51", kill_on_drop: false }`
[INFO] [stdout] 1e24e1415f340e7d470282a4cc9177409a5d49bec6532d79fc441271eff2be51
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0c278d0c9138a4002662cef4738bb38c30a305887d6b88cddd2c553af27f7bdb
[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" "0c278d0c9138a4002662cef4738bb38c30a305887d6b88cddd2c553af27f7bdb", kill_on_drop: false }`
[INFO] [stderr]     Checking trees v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `minimum`
[INFO] [stdout]   --> src/tree.rs:59:12
[INFO] [stdout]    |
[INFO] [stdout] 59 |     pub fn minimum(&self) -> Option<&T> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `maximum`
[INFO] [stdout]   --> src/tree.rs:69:12
[INFO] [stdout]    |
[INFO] [stdout] 69 |     pub fn maximum(&self) -> Option<&T> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `search`
[INFO] [stdout]   --> src/tree.rs:79:12
[INFO] [stdout]    |
[INFO] [stdout] 79 |     pub fn search(&self, target: &T) -> bool {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `minimum`
[INFO] [stdout]   --> src/tree.rs:59:12
[INFO] [stdout]    |
[INFO] [stdout] 59 |     pub fn minimum(&self) -> Option<&T> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `maximum`
[INFO] [stdout]   --> src/tree.rs:69:12
[INFO] [stdout]    |
[INFO] [stdout] 69 |     pub fn maximum(&self) -> Option<&T> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `search`
[INFO] [stdout]   --> src/tree.rs:79:12
[INFO] [stdout]    |
[INFO] [stdout] 79 |     pub fn search(&self, target: &T) -> bool {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.56s
[INFO] running `Command { std: "docker" "inspect" "0c278d0c9138a4002662cef4738bb38c30a305887d6b88cddd2c553af27f7bdb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0c278d0c9138a4002662cef4738bb38c30a305887d6b88cddd2c553af27f7bdb", kill_on_drop: false }`
[INFO] [stdout] 0c278d0c9138a4002662cef4738bb38c30a305887d6b88cddd2c553af27f7bdb