[INFO] cloning repository https://github.com/vin136/rust-leetcode
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/vin136/rust-leetcode" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvin136%2Frust-leetcode", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvin136%2Frust-leetcode'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ed00f7d613d31765a201d6de5b705b0cc2d9e01d
[INFO] checking vin136/rust-leetcode against master#2886b36df4a646dd8d82fb65bf0c9d8d96c1f71a for pr-145113
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvin136%2Frust-leetcode" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/vin136/rust-leetcode
[INFO] finished tweaking git repo https://github.com/vin136/rust-leetcode
[INFO] tweaked toml for git repo https://github.com/vin136/rust-leetcode written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/vin136/rust-leetcode on toolchain 2886b36df4a646dd8d82fb65bf0c9d8d96c1f71a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2886b36df4a646dd8d82fb65bf0c9d8d96c1f71a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/vin136/rust-leetcode 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" "+2886b36df4a646dd8d82fb65bf0c9d8d96c1f71a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:ae6f63d130afcfff7f91f5ba9fdb2a74d52830289c6a2ea2d23a94dcfb480a0d" "/opt/rustwide/cargo-home/bin/cargo" "+2886b36df4a646dd8d82fb65bf0c9d8d96c1f71a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 79b6c87dbf46d134f28aa3f7e89bef55340f22d361b5eddf6960c28276769e39
[INFO] running `Command { std: "docker" "start" "-a" "79b6c87dbf46d134f28aa3f7e89bef55340f22d361b5eddf6960c28276769e39", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "79b6c87dbf46d134f28aa3f7e89bef55340f22d361b5eddf6960c28276769e39", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "79b6c87dbf46d134f28aa3f7e89bef55340f22d361b5eddf6960c28276769e39", kill_on_drop: false }`
[INFO] [stdout] 79b6c87dbf46d134f28aa3f7e89bef55340f22d361b5eddf6960c28276769e39
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:ae6f63d130afcfff7f91f5ba9fdb2a74d52830289c6a2ea2d23a94dcfb480a0d" "/opt/rustwide/cargo-home/bin/cargo" "+2886b36df4a646dd8d82fb65bf0c9d8d96c1f71a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2e5a4c92cf6ca7060c7d5f6298f9b8ec099349d21ea07899b63f13524d6960bf
[INFO] running `Command { std: "docker" "start" "-a" "2e5a4c92cf6ca7060c7d5f6298f9b8ec099349d21ea07899b63f13524d6960bf", kill_on_drop: false }`
[INFO] [stderr]     Checking rustcode v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable `G` should have a snake case name
[INFO] [stdout]  --> src/algorithms/graphs.rs:4:29
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn connected_components(G: &HashMap<i32, Vec<i32>>) -> usize {
[INFO] [stdout]   |                             ^ help: convert the identifier to snake case: `g`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `G` should have a snake case name
[INFO] [stdout]   --> src/algorithms/graphs.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |         G: &HashMap<i32, Vec<i32>>,
[INFO] [stdout]    |         ^ help: convert the identifier to snake case: `g`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `G` should have a snake case name
[INFO] [stdout]  --> src/algorithms/graphs.rs:4:29
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn connected_components(G: &HashMap<i32, Vec<i32>>) -> usize {
[INFO] [stdout]   |                             ^ help: convert the identifier to snake case: `g`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `G` should have a snake case name
[INFO] [stdout]   --> src/algorithms/graphs.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |         G: &HashMap<i32, Vec<i32>>,
[INFO] [stdout]    |         ^ help: convert the identifier to snake case: `g`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.08s
[INFO] running `Command { std: "docker" "inspect" "2e5a4c92cf6ca7060c7d5f6298f9b8ec099349d21ea07899b63f13524d6960bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2e5a4c92cf6ca7060c7d5f6298f9b8ec099349d21ea07899b63f13524d6960bf", kill_on_drop: false }`
[INFO] [stdout] 2e5a4c92cf6ca7060c7d5f6298f9b8ec099349d21ea07899b63f13524d6960bf