[INFO] cloning repository https://github.com/stevenleadbeater/binary-search-exercises
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/stevenleadbeater/binary-search-exercises" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstevenleadbeater%2Fbinary-search-exercises", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstevenleadbeater%2Fbinary-search-exercises'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6438adb785bb5e6f99f3e1b4840c541bdcc600ce
[INFO] checking stevenleadbeater/binary-search-exercises against try#3bb2879ea9e58d65b875f9a98df44f4a43ce2597 for pr-85387
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstevenleadbeater%2Fbinary-search-exercises" "/workspace/builds/worker-15/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-15/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/stevenleadbeater/binary-search-exercises on toolchain 3bb2879ea9e58d65b875f9a98df44f4a43ce2597
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3bb2879ea9e58d65b875f9a98df44f4a43ce2597" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/stevenleadbeater/binary-search-exercises
[INFO] finished tweaking git repo https://github.com/stevenleadbeater/binary-search-exercises
[INFO] tweaked toml for git repo https://github.com/stevenleadbeater/binary-search-exercises written to /workspace/builds/worker-15/source/Cargo.toml
[INFO] crate git repo https://github.com/stevenleadbeater/binary-search-exercises already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3bb2879ea9e58d65b875f9a98df44f4a43ce2597" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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" "+3bb2879ea9e58d65b875f9a98df44f4a43ce2597" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cb6acf52c0f7e2deeae581cc7f2b1fdead129a4f4ea206b25ae38b6281eaacb5
[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" "cb6acf52c0f7e2deeae581cc7f2b1fdead129a4f4ea206b25ae38b6281eaacb5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cb6acf52c0f7e2deeae581cc7f2b1fdead129a4f4ea206b25ae38b6281eaacb5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cb6acf52c0f7e2deeae581cc7f2b1fdead129a4f4ea206b25ae38b6281eaacb5", kill_on_drop: false }`
[INFO] [stdout] cb6acf52c0f7e2deeae581cc7f2b1fdead129a4f4ea206b25ae38b6281eaacb5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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" "+3bb2879ea9e58d65b875f9a98df44f4a43ce2597" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 263848b1a92d8d6b94b74e4378bc9ef5f273d007c3017ccc53ad85d3f363b4ba
[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" "263848b1a92d8d6b94b74e4378bc9ef5f273d007c3017ccc53ad85d3f363b4ba", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking binary-search v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `mid` is never read
[INFO] [stdout]   --> src/binary_search.rs:18:17
[INFO] [stdout]    |
[INFO] [stdout] 18 |         let mut mid = high / 2;
[INFO] [stdout]    |                 ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `BinarySearch`
[INFO] [stdout]  --> src/binary_search.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct BinarySearch {
[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: `new`
[INFO] [stdout]  --> src/binary_search.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 |     fn new(array: Vec<i64>) -> BinarySearch {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `search`
[INFO] [stdout]   --> src/binary_search.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 |     fn search(&self, target: i64) -> i64 {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `mid` is never read
[INFO] [stdout]   --> src/binary_search.rs:18:17
[INFO] [stdout]    |
[INFO] [stdout] 18 |         let mut mid = high / 2;
[INFO] [stdout]    |                 ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.32s
[INFO] running `Command { std: "docker" "inspect" "263848b1a92d8d6b94b74e4378bc9ef5f273d007c3017ccc53ad85d3f363b4ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "263848b1a92d8d6b94b74e4378bc9ef5f273d007c3017ccc53ad85d3f363b4ba", kill_on_drop: false }`
[INFO] [stdout] 263848b1a92d8d6b94b74e4378bc9ef5f273d007c3017ccc53ad85d3f363b4ba