[INFO] cloning repository https://github.com/bashhack/grokking_algos
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/bashhack/grokking_algos" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbashhack%2Fgrokking_algos", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbashhack%2Fgrokking_algos'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b87385abffa742208626ec1812d7813b35e81074
[INFO] checking bashhack/grokking_algos against try#9c1dcf141bc0875407c4eb36972857bd3db713e2 for pr-81863
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbashhack%2Fgrokking_algos" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/bashhack/grokking_algos on toolchain 9c1dcf141bc0875407c4eb36972857bd3db713e2
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9c1dcf141bc0875407c4eb36972857bd3db713e2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/bashhack/grokking_algos
[INFO] finished tweaking git repo https://github.com/bashhack/grokking_algos
[INFO] tweaked toml for git repo https://github.com/bashhack/grokking_algos written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/bashhack/grokking_algos already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9c1dcf141bc0875407c4eb36972857bd3db713e2" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+9c1dcf141bc0875407c4eb36972857bd3db713e2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0e5a0e87121660fc9f6621d44f178e884824d7d51377b517ae6e3a5646dbc829
[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" "0e5a0e87121660fc9f6621d44f178e884824d7d51377b517ae6e3a5646dbc829", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0e5a0e87121660fc9f6621d44f178e884824d7d51377b517ae6e3a5646dbc829", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0e5a0e87121660fc9f6621d44f178e884824d7d51377b517ae6e3a5646dbc829", kill_on_drop: false }`
[INFO] [stdout] 0e5a0e87121660fc9f6621d44f178e884824d7d51377b517ae6e3a5646dbc829
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+9c1dcf141bc0875407c4eb36972857bd3db713e2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 39ba1f8dc11fdf86c0a13030bc5867f90d394da4228763583be502c27ab160b7
[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" "39ba1f8dc11fdf86c0a13030bc5867f90d394da4228763583be502c27ab160b7", kill_on_drop: false }`
[INFO] [stderr]     Checking grokking_algos v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `linear_search`
[INFO] [stdout]    --> src/intro_to_algos/mod.rs:157:8
[INFO] [stdout]     |
[INFO] [stdout] 157 | pub fn linear_search<T: Ord + std::fmt::Debug>(list: &[T], item: T) -> Option<usize> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `iterative_binary_search`
[INFO] [stdout]    --> src/intro_to_algos/mod.rs:185:8
[INFO] [stdout]     |
[INFO] [stdout] 185 | pub fn iterative_binary_search<T: Ord + std::fmt::Debug>(list: &[T], item: T) -> Option<usize> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `recursive_binary_search`
[INFO] [stdout]    --> src/intro_to_algos/mod.rs:233:8
[INFO] [stdout]     |
[INFO] [stdout] 233 | pub fn recursive_binary_search<T: Ord + std::fmt::Debug>(
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.45s
[INFO] running `Command { std: "docker" "inspect" "39ba1f8dc11fdf86c0a13030bc5867f90d394da4228763583be502c27ab160b7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "39ba1f8dc11fdf86c0a13030bc5867f90d394da4228763583be502c27ab160b7", kill_on_drop: false }`
[INFO] [stdout] 39ba1f8dc11fdf86c0a13030bc5867f90d394da4228763583be502c27ab160b7