[INFO] cloning repository https://github.com/dakamakat/rust_algorithms
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dakamakat/rust_algorithms" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdakamakat%2Frust_algorithms", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdakamakat%2Frust_algorithms'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3fd24c895bc93e41b6f2addda99260cd9b8b054e
[INFO] checking dakamakat/rust_algorithms/3fd24c895bc93e41b6f2addda99260cd9b8b054e against master#ab869e094a907cc5d19b4080f22eccaf347f1f95 for pr-129604
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdakamakat%2Frust_algorithms" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/dakamakat/rust_algorithms on toolchain ab869e094a907cc5d19b4080f22eccaf347f1f95
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/dakamakat/rust_algorithms
[INFO] finished tweaking git repo https://github.com/dakamakat/rust_algorithms
[INFO] tweaked toml for git repo https://github.com/dakamakat/rust_algorithms written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/dakamakat/rust_algorithms 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" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5980db8c3a1f9f37b15eab91bdbd60a33f89ae559a7a4a1606345d4fb58862d0
[INFO] running `Command { std: "docker" "start" "-a" "5980db8c3a1f9f37b15eab91bdbd60a33f89ae559a7a4a1606345d4fb58862d0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5980db8c3a1f9f37b15eab91bdbd60a33f89ae559a7a4a1606345d4fb58862d0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5980db8c3a1f9f37b15eab91bdbd60a33f89ae559a7a4a1606345d4fb58862d0", kill_on_drop: false }`
[INFO] [stdout] 5980db8c3a1f9f37b15eab91bdbd60a33f89ae559a7a4a1606345d4fb58862d0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 97b18b091a61fabb23d73dfed9fecaae2fe76e725fd514bda127f623df100066
[INFO] running `Command { std: "docker" "start" "-a" "97b18b091a61fabb23d73dfed9fecaae2fe76e725fd514bda127f623df100066", kill_on_drop: false }`
[INFO] [stderr]     Checking Rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/linked_list/algs.rs:60:57
[INFO] [stdout]    |
[INFO] [stdout] 60 | pub fn remove_nth_from_end(head: Option<Box<ListNode>>, n: i32) -> Option<Box<ListNode>> {
[INFO] [stdout]    |                                                         ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/linked_list/algs.rs:60:57
[INFO] [stdout]    |
[INFO] [stdout] 60 | pub fn remove_nth_from_end(head: Option<Box<ListNode>>, n: i32) -> Option<Box<ListNode>> {
[INFO] [stdout]    |                                                         ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `queue`
[INFO] [stdout]   --> src/linked_list/tests.rs:46:9
[INFO] [stdout]    |
[INFO] [stdout] 46 |     let queue = CircularQueue::new(3);
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_queue`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `height`
[INFO] [stdout]   --> src/stack_queue/algs.rs:66:13
[INFO] [stdout]    |
[INFO] [stdout] 66 | pub fn trap(height: Vec<i32>) -> i32 {
[INFO] [stdout]    |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_height`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `queue`
[INFO] [stdout]   --> src/linked_list/tests.rs:46:9
[INFO] [stdout]    |
[INFO] [stdout] 46 |     let queue = CircularQueue::new(3);
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_queue`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `height`
[INFO] [stdout]   --> src/stack_queue/algs.rs:66:13
[INFO] [stdout]    |
[INFO] [stdout] 66 | pub fn trap(height: Vec<i32>) -> i32 {
[INFO] [stdout]    |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_height`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/trees/models.rs:30:12
[INFO] [stdout]    |
[INFO] [stdout] 29 | impl Node {
[INFO] [stdout]    | --------- associated function in this implementation
[INFO] [stdout] 30 |     pub fn new(val: i32) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/trees/models.rs:30:12
[INFO] [stdout]    |
[INFO] [stdout] 29 | impl Node {
[INFO] [stdout]    | --------- associated function in this implementation
[INFO] [stdout] 30 |     pub fn new(val: i32) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.24s
[INFO] running `Command { std: "docker" "inspect" "97b18b091a61fabb23d73dfed9fecaae2fe76e725fd514bda127f623df100066", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "97b18b091a61fabb23d73dfed9fecaae2fe76e725fd514bda127f623df100066", kill_on_drop: false }`
[INFO] [stdout] 97b18b091a61fabb23d73dfed9fecaae2fe76e725fd514bda127f623df100066