[INFO] cloning repository https://github.com/LgnMs/my-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/LgnMs/my-leetcode-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLgnMs%2Fmy-leetcode-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLgnMs%2Fmy-leetcode-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 719285af831a8acc15c64847e595337a97adc332
[INFO] checking LgnMs/my-leetcode-rust against master#a5f164faad4a2fed606b8160fd7ecd2d5cbba381 for pr-84920
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLgnMs%2Fmy-leetcode-rust" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/LgnMs/my-leetcode-rust on toolchain a5f164faad4a2fed606b8160fd7ecd2d5cbba381
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/LgnMs/my-leetcode-rust
[INFO] finished tweaking git repo https://github.com/LgnMs/my-leetcode-rust
[INFO] tweaked toml for git repo https://github.com/LgnMs/my-leetcode-rust written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/LgnMs/my-leetcode-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c6abc422b6426ccdfdcdcacd5354f9861fb7cd0896dc50c5a22f4a86500c8ab9
[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" "c6abc422b6426ccdfdcdcacd5354f9861fb7cd0896dc50c5a22f4a86500c8ab9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c6abc422b6426ccdfdcdcacd5354f9861fb7cd0896dc50c5a22f4a86500c8ab9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c6abc422b6426ccdfdcdcacd5354f9861fb7cd0896dc50c5a22f4a86500c8ab9", kill_on_drop: false }`
[INFO] [stdout] c6abc422b6426ccdfdcdcacd5354f9861fb7cd0896dc50c5a22f4a86500c8ab9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 948f6619a830c90ba6b701611d2502e9684889c36416649350e58ead23109511
[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" "948f6619a830c90ba6b701611d2502e9684889c36416649350e58ead23109511", kill_on_drop: false }`
[INFO] [stderr]     Checking rust-play v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `search`
[INFO] [stdout]  --> src/playground.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn search(nums: Vec<i32>, target: i32) -> i32 {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `two_sum`
[INFO] [stdout]  --> src/two_sum.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn two_sum(nums: Vec<i32>, target: i32) -> Vec<i32> {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/add_two_numbers.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 |     fn new(val: i32) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `add_two_numbers`
[INFO] [stdout]   --> src/add_two_numbers.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub fn add_two_numbers(l1: Option<Box<ListNode>>, l2: Option<Box<ListNode>>) -> Option<Box<ListNode>> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `generate_list_node`
[INFO] [stdout]   --> src/add_two_numbers.rs:69:4
[INFO] [stdout]    |
[INFO] [stdout] 69 | fn generate_list_node(vecs: Vec<i32>) -> Option<Box<ListNode>> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `length_of_longest_substring`
[INFO] [stdout]   --> src/length_of_longest_substring.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub fn length_of_longest_substring(s: String) -> i32 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `is_palindrome`
[INFO] [stdout]   --> src/longest_palindrome.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub fn is_palindrome(s: &[char]) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `longest_palindrome`
[INFO] [stdout]   --> src/longest_palindrome.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub fn longest_palindrome(s: String) -> String {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `is_palindrome`
[INFO] [stdout]  --> src/is_palindrome.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn is_palindrome(x: i32) -> bool {
[INFO] [stdout]   |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `roman_to_int`
[INFO] [stdout]   --> src/roman_to_int.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub fn roman_to_int(s: String) -> i32 {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `xor_operation`
[INFO] [stdout]  --> src/xor_operation.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn xor_operation(n: i32, start: i32) -> i32 {
[INFO] [stdout]   |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `longest_common_prefix`
[INFO] [stdout]  --> src/longest_common_prefix.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn longest_common_prefix(strs: Vec<String>) -> String {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.55s
[INFO] running `Command { std: "docker" "inspect" "948f6619a830c90ba6b701611d2502e9684889c36416649350e58ead23109511", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "948f6619a830c90ba6b701611d2502e9684889c36416649350e58ead23109511", kill_on_drop: false }`
[INFO] [stdout] 948f6619a830c90ba6b701611d2502e9684889c36416649350e58ead23109511