[INFO] updating cached repository https://github.com/evgeni-nabokov/leetcode-rust
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] [stderr] From https://github.com/evgeni-nabokov/leetcode-rust
[INFO] [stderr]    d1af801..d9abe30  master     -> master
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d9abe307bab05453ffbb1debc582171039a5f9c3
[INFO] checking evgeni-nabokov/leetcode-rust against try#3ae4c050387df9f7fbb379ee90ce8bf05e566870 for pr-70872
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fevgeni-nabokov%2Fleetcode-rust" "/workspace/builds/worker-6/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/evgeni-nabokov/leetcode-rust on toolchain 3ae4c050387df9f7fbb379ee90ce8bf05e566870
[INFO] running `"/workspace/cargo-home/bin/cargo" "+3ae4c050387df9f7fbb379ee90ce8bf05e566870" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/evgeni-nabokov/leetcode-rust
[INFO] finished tweaking git repo https://github.com/evgeni-nabokov/leetcode-rust
[INFO] tweaked toml for git repo https://github.com/evgeni-nabokov/leetcode-rust written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/evgeni-nabokov/leetcode-rust already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+3ae4c050387df9f7fbb379ee90ce8bf05e566870" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+3ae4c050387df9f7fbb379ee90ce8bf05e566870" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] e3bd159c9239bc0b286da249b878698edc24ea39dff15911030bab68d9222110
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "e3bd159c9239bc0b286da249b878698edc24ea39dff15911030bab68d9222110"`
[INFO] [stderr]     Checking leetcode v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/challenge/mod.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |     fn new(val: i32) -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]   --> src/challenge/mod.rs:24:8
[INFO] [stderr]    |
[INFO] [stderr] 24 | struct Solution;
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `single_number`
[INFO] [stderr]   --> src/challenge/mod.rs:28:5
[INFO] [stderr]    |
[INFO] [stderr] 28 |     pub fn single_number(mut nums: Vec<i32>) -> i32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `single_number_v2`
[INFO] [stderr]   --> src/challenge/mod.rs:48:5
[INFO] [stderr]    |
[INFO] [stderr] 48 |     pub fn single_number_v2(nums: Vec<i32>) -> i32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_happy`
[INFO] [stderr]   --> src/challenge/mod.rs:57:5
[INFO] [stderr]    |
[INFO] [stderr] 57 |     pub fn is_happy(n: i32) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `max_sub_array`
[INFO] [stderr]   --> src/challenge/mod.rs:83:5
[INFO] [stderr]    |
[INFO] [stderr] 83 |     pub fn max_sub_array(nums: Vec<i32>) -> i32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `max_sub_array_v2`
[INFO] [stderr]    --> src/challenge/mod.rs:107:5
[INFO] [stderr]     |
[INFO] [stderr] 107 |     pub fn max_sub_array_v2(nums: Vec<i32>) -> i32 {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `move_zeroes`
[INFO] [stderr]    --> src/challenge/mod.rs:119:5
[INFO] [stderr]     |
[INFO] [stderr] 119 |     pub fn move_zeroes(nums: &mut Vec<i32>) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `move_zeroes_v2`
[INFO] [stderr]    --> src/challenge/mod.rs:137:5
[INFO] [stderr]     |
[INFO] [stderr] 137 |     pub fn move_zeroes_v2(nums: &mut Vec<i32>) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `max_profit`
[INFO] [stderr]    --> src/challenge/mod.rs:154:5
[INFO] [stderr]     |
[INFO] [stderr] 154 |     pub fn max_profit(prices: Vec<i32>) -> i32 {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `max_profit_v2`
[INFO] [stderr]    --> src/challenge/mod.rs:191:5
[INFO] [stderr]     |
[INFO] [stderr] 191 |     pub fn max_profit_v2(prices: Vec<i32>) -> i32 {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `group_anagrams`
[INFO] [stderr]    --> src/challenge/mod.rs:206:5
[INFO] [stderr]     |
[INFO] [stderr] 206 |     pub fn group_anagrams(strs: Vec<String>) -> Vec<Vec<String>> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `group_anagrams_v2`
[INFO] [stderr]    --> src/challenge/mod.rs:225:5
[INFO] [stderr]     |
[INFO] [stderr] 225 |     pub fn group_anagrams_v2(strs: Vec<String>) -> Vec<Vec<String>> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `count_elements`
[INFO] [stderr]    --> src/challenge/mod.rs:242:5
[INFO] [stderr]     |
[INFO] [stderr] 242 |     pub fn count_elements(mut arr: Vec<i32>) -> i32 {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `middle_node`
[INFO] [stderr]    --> src/challenge/mod.rs:261:5
[INFO] [stderr]     |
[INFO] [stderr] 261 |     pub fn middle_node(head: Option<Box<ListNode>>) -> Option<Box<ListNode>> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/easy/mod.rs:6:8
[INFO] [stderr]   |
[INFO] [stderr] 6 | struct Solution {}
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `two_sum`
[INFO] [stderr]   --> src/easy/mod.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     pub fn two_sum(nums: Vec<i32>, target: i32) -> Vec<i32> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/medium/mod.rs:4:8
[INFO] [stderr]   |
[INFO] [stderr] 4 | struct Solution {}
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `three_sum`
[INFO] [stderr]  --> src/medium/mod.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     pub fn three_sum(mut nums: Vec<i32>) -> Vec<Vec<i32>> {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.10s
[INFO] running `"docker" "inspect" "e3bd159c9239bc0b286da249b878698edc24ea39dff15911030bab68d9222110"`
[INFO] running `"docker" "rm" "-f" "e3bd159c9239bc0b286da249b878698edc24ea39dff15911030bab68d9222110"`
[INFO] [stdout] e3bd159c9239bc0b286da249b878698edc24ea39dff15911030bab68d9222110