[INFO] cloning repository https://github.com/JoverZhang/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/JoverZhang/leetcode.rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJoverZhang%2Fleetcode.rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJoverZhang%2Fleetcode.rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e2c981b01ed14fb6f8796350cad146bca871cc40
[INFO] checking JoverZhang/leetcode.rust against master#936f2600b6c903b04387f74ed5cbce88bb06d243 for pr-91141
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJoverZhang%2Fleetcode.rust" "/workspace/builds/worker-13/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-13/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/JoverZhang/leetcode.rust on toolchain 936f2600b6c903b04387f74ed5cbce88bb06d243
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/JoverZhang/leetcode.rust
[INFO] finished tweaking git repo https://github.com/JoverZhang/leetcode.rust
[INFO] tweaked toml for git repo https://github.com/JoverZhang/leetcode.rust written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate git repo https://github.com/JoverZhang/leetcode.rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 336a5ad4484bc9267f587c6bfcff18695a42c81172207b8cf04a2e1bc59e80a6
[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" "336a5ad4484bc9267f587c6bfcff18695a42c81172207b8cf04a2e1bc59e80a6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "336a5ad4484bc9267f587c6bfcff18695a42c81172207b8cf04a2e1bc59e80a6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "336a5ad4484bc9267f587c6bfcff18695a42c81172207b8cf04a2e1bc59e80a6", kill_on_drop: false }`
[INFO] [stdout] 336a5ad4484bc9267f587c6bfcff18695a42c81172207b8cf04a2e1bc59e80a6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e5db4033d949e36844be6f4e31393c8121f4059610837506748f0d5eeaa8949a
[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" "e5db4033d949e36844be6f4e31393c8121f4059610837506748f0d5eeaa8949a", kill_on_drop: false }`
[INFO] [stderr]     Checking algorithm v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/q11.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | 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: `max_area`
[INFO] [stdout]  --> src/q11.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 |     pub fn max_area(height: Vec<i32>) -> i32 {
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/q12.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Solution {}
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `parse_1`
[INFO] [stdout]  --> src/q12.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 |     fn parse_1(num: i32) -> &'static str {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `parse_2`
[INFO] [stdout]   --> src/q12.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 27 |     fn parse_2(num: i32) -> &'static str {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `parse_3`
[INFO] [stdout]   --> src/q12.rs:50:8
[INFO] [stdout]    |
[INFO] [stdout] 50 |     fn parse_3(num: i32) -> &'static str {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `parse_4`
[INFO] [stdout]   --> src/q12.rs:73:8
[INFO] [stdout]    |
[INFO] [stdout] 73 |     fn parse_4(num: i32) -> &'static str {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `int_to_roman`
[INFO] [stdout]   --> src/q12.rs:84:12
[INFO] [stdout]    |
[INFO] [stdout] 84 |     pub fn int_to_roman(num: i32) -> String {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `BestSolution`
[INFO] [stdout]    --> src/q12.rs:102:8
[INFO] [stdout]     |
[INFO] [stdout] 102 | struct BestSolution {}
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `int_to_roman`
[INFO] [stdout]    --> src/q12.rs:105:12
[INFO] [stdout]     |
[INFO] [stdout] 105 |     pub fn int_to_roman(num: i32) -> String {
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/q14.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Solution {}
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `longest_common_prefix`
[INFO] [stdout]  --> src/q14.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 |     pub fn longest_common_prefix(strs: Vec<String>) -> String {
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/q20.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct Solution {}
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_valid`
[INFO] [stdout]  --> src/q20.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 |     pub fn is_valid(s: String) -> bool {
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/q1342.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Solution {}
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `number_of_steps`
[INFO] [stdout]  --> src/q1342.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 |     pub fn number_of_steps(num: i32) -> i32 {
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/q1389.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Solution {}
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `create_target_array`
[INFO] [stdout]  --> src/q1389.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 |     pub fn create_target_array(nums: Vec<i32>, index: Vec<i32>) -> Vec<i32> {
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/q1470.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Solution {}
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `shuffle`
[INFO] [stdout]  --> src/q1470.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 |     pub fn shuffle(nums: Vec<i32>, n: i32) -> Vec<i32> {
[INFO] [stdout]   |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/q1528.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Solution {}
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `restore_string`
[INFO] [stdout]  --> src/q1528.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 |     pub fn restore_string(s: String, indices: Vec<i32>) -> String {
[INFO] [stdout]   |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/q1678.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Solution {}
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `interpret`
[INFO] [stdout]  --> src/q1678.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 |     pub fn interpret(command: String) -> String {
[INFO] [stdout]   |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `BestSolution`
[INFO] [stdout]   --> src/q1678.rs:27:12
[INFO] [stdout]    |
[INFO] [stdout] 27 | pub struct BestSolution {}
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `interpret`
[INFO] [stdout]   --> src/q1678.rs:30:12
[INFO] [stdout]    |
[INFO] [stdout] 30 |     pub fn interpret(command: String) -> String {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/q1689.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct Solution {}
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `min_partitions`
[INFO] [stdout]  --> src/q1689.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 |     pub fn min_partitions(n: String) -> i32 {
[INFO] [stdout]   |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/q1769.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Solution {}
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `min_operations`
[INFO] [stdout]  --> src/q1769.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 |     pub fn min_operations(boxes: String) -> Vec<i32> {
[INFO] [stdout]   |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `BestSolution`
[INFO] [stdout]   --> src/q1769.rs:29:8
[INFO] [stdout]    |
[INFO] [stdout] 29 | struct BestSolution {}
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `min_operations`
[INFO] [stdout]   --> src/q1769.rs:32:12
[INFO] [stdout]    |
[INFO] [stdout] 32 |     pub fn min_operations(boxes: String) -> Vec<i32> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/q2011.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Solution {}
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `final_value_after_operations`
[INFO] [stdout]  --> src/q2011.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 |     pub fn final_value_after_operations(operations: Vec<String>) -> i32 {
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 34 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.63s
[INFO] running `Command { std: "docker" "inspect" "e5db4033d949e36844be6f4e31393c8121f4059610837506748f0d5eeaa8949a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e5db4033d949e36844be6f4e31393c8121f4059610837506748f0d5eeaa8949a", kill_on_drop: false }`
[INFO] [stdout] e5db4033d949e36844be6f4e31393c8121f4059610837506748f0d5eeaa8949a