[INFO] cloning repository https://github.com/guoraymon/leetcode-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/guoraymon/leetcode-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fguoraymon%2Fleetcode-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fguoraymon%2Fleetcode-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 331d2486ff990847fdfa88a95ff4e6a08ebc8d99
[INFO] checking guoraymon/leetcode-rust against master#a609fb45efad59dfd459c76e50899be9f0583b5a for pr-80579
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fguoraymon%2Fleetcode-rust" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/guoraymon/leetcode-rust on toolchain a609fb45efad59dfd459c76e50899be9f0583b5a
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/guoraymon/leetcode-rust
[INFO] finished tweaking git repo https://github.com/guoraymon/leetcode-rust
[INFO] tweaked toml for git repo https://github.com/guoraymon/leetcode-rust written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/guoraymon/leetcode-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] c37d728a1638720f921746f663cbf706b8eb6b96c0993997a18cf9cb6a8def2b
[INFO] running `Command { std: "docker" "start" "-a" "c37d728a1638720f921746f663cbf706b8eb6b96c0993997a18cf9cb6a8def2b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c37d728a1638720f921746f663cbf706b8eb6b96c0993997a18cf9cb6a8def2b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c37d728a1638720f921746f663cbf706b8eb6b96c0993997a18cf9cb6a8def2b", kill_on_drop: false }`
[INFO] [stdout] c37d728a1638720f921746f663cbf706b8eb6b96c0993997a18cf9cb6a8def2b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] f25100ffa3a90fa7b42a1d1bdc3db8c57c3b760e8fdf671ddbe167158878ed0d
[INFO] running `Command { std: "docker" "start" "-a" "f25100ffa3a90fa7b42a1d1bdc3db8c57c3b760e8fdf671ddbe167158878ed0d", kill_on_drop: false }`
[INFO] [stderr]     Checking leetcode-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/add_strings.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub struct Solution {}
[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: `add_strings`
[INFO] [stdout]   --> src/add_strings.rs:19:12
[INFO] [stdout]    |
[INFO] [stdout] 19 |     pub fn add_strings(mut num1: String, mut num2: String) -> String {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/course_schedule.rs:25:12
[INFO] [stdout]    |
[INFO] [stdout] 25 | pub struct Solution {}
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `can_finish`
[INFO] [stdout]   --> src/course_schedule.rs:28:12
[INFO] [stdout]    |
[INFO] [stdout] 28 |     pub fn can_finish(num_courses: i32, prerequisites: Vec<Vec<i32>>) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/same_tree.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 11 |     pub fn new(val: i32) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/same_tree.rs:58:12
[INFO] [stdout]    |
[INFO] [stdout] 58 | pub struct Solution {}
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `dfs`
[INFO] [stdout]   --> src/same_tree.rs:61:12
[INFO] [stdout]    |
[INFO] [stdout] 61 |     pub fn dfs(p: Option<Rc<RefCell<TreeNode>>>, q: Option<Rc<RefCell<TreeNode>>>) -> bool {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/valid_parentheses.rs:34:12
[INFO] [stdout]    |
[INFO] [stdout] 34 | pub struct Solution {}
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_valid`
[INFO] [stdout]   --> src/valid_parentheses.rs:37:12
[INFO] [stdout]    |
[INFO] [stdout] 37 |     pub fn is_valid(s: String) -> bool {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.99s
[INFO] running `Command { std: "docker" "inspect" "f25100ffa3a90fa7b42a1d1bdc3db8c57c3b760e8fdf671ddbe167158878ed0d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f25100ffa3a90fa7b42a1d1bdc3db8c57c3b760e8fdf671ddbe167158878ed0d", kill_on_drop: false }`
[INFO] [stdout] f25100ffa3a90fa7b42a1d1bdc3db8c57c3b760e8fdf671ddbe167158878ed0d