[INFO] updating cached repository https://github.com/guoraymon/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] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 23070baf892ad261342c276f98981e80b661fde2
[INFO] checking guoraymon/leetcode-rust against try#f149601db42efe10ece8b284ab681fd4a6fcb89c for pr-68766
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fguoraymon%2Fleetcode-rust" "/workspace/builds/worker-8/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/guoraymon/leetcode-rust on toolchain f149601db42efe10ece8b284ab681fd4a6fcb89c
[INFO] running `"/workspace/cargo-home/bin/cargo" "+f149601db42efe10ece8b284ab681fd4a6fcb89c" "read-manifest" "--manifest-path" "Cargo.toml"`
[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-8/source/Cargo.toml
[INFO] crate git repo https://github.com/guoraymon/leetcode-rust already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+f149601db42efe10ece8b284ab681fd4a6fcb89c" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+f149601db42efe10ece8b284ab681fd4a6fcb89c" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] d11ddea5e1922edef9283efc27aa9c59616396a3bd657e4e702cf9d1ecf81156
[INFO] running `"docker" "start" "-a" "d11ddea5e1922edef9283efc27aa9c59616396a3bd657e4e702cf9d1ecf81156"`
[INFO] [stderr]     Checking leetcode v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]   --> src/house_robber.rs:12:12
[INFO] [stderr]    |
[INFO] [stderr] 12 | pub struct Solution {}
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `rob`
[INFO] [stderr]   --> src/house_robber.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 |     pub fn rob(nums: Vec<i32>) -> i32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]   --> src/house_robber_ii.rs:12:12
[INFO] [stderr]    |
[INFO] [stderr] 12 | pub struct Solution {}
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `rob`
[INFO] [stderr]   --> src/house_robber_ii.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     pub fn rob(nums: Vec<i32>) -> i32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `rob_i`
[INFO] [stderr]   --> src/house_robber_ii.rs:26:5
[INFO] [stderr]    |
[INFO] [stderr] 26 |     pub fn rob_i(nums: &[i32]) -> i32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/triangle.rs:3:12
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub struct Solution {}
[INFO] [stderr]   |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `minimum_total`
[INFO] [stderr]   --> src/triangle.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |     pub fn minimum_total(mut triangle: Vec<Vec<i32>>) -> i32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/best_time_to_buy_and_sell_stock_ii.rs:3:12
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub struct Solution {}
[INFO] [stderr]   |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `max_profit`
[INFO] [stderr]   --> src/best_time_to_buy_and_sell_stock_ii.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     pub fn max_profit(prices: Vec<i32>) -> i32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/maximal_square.rs:3:12
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub struct Solution {}
[INFO] [stderr]   |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `maximal_square`
[INFO] [stderr]  --> src/maximal_square.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     pub fn maximal_square(matrix: Vec<Vec<char>>) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/maximum_subarray.rs:3:12
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub struct Solution {}
[INFO] [stderr]   |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `max_sub_array`
[INFO] [stderr]  --> src/maximum_subarray.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 |     pub fn max_sub_array(nums: Vec<i32>) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/longest_increasing_subsequence.rs:3:12
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub struct Solution {}
[INFO] [stderr]   |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `length_of_lis`
[INFO] [stderr]  --> src/longest_increasing_subsequence.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     pub fn length_of_lis(nums: Vec<i32>) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/longest_common_prefix.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Solution {}
[INFO] [stderr]   |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `longest_common_prefix`
[INFO] [stderr]  --> src/longest_common_prefix.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn longest_common_prefix(strs: Vec<String>) -> String {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.93s
[INFO] running `"docker" "inspect" "d11ddea5e1922edef9283efc27aa9c59616396a3bd657e4e702cf9d1ecf81156"`
[INFO] running `"docker" "rm" "-f" "d11ddea5e1922edef9283efc27aa9c59616396a3bd657e4e702cf9d1ecf81156"`
[INFO] [stdout] d11ddea5e1922edef9283efc27aa9c59616396a3bd657e4e702cf9d1ecf81156