[INFO] cloning repository https://github.com/oOXuOo/leetcode
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/oOXuOo/leetcode" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FoOXuOo%2Fleetcode", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FoOXuOo%2Fleetcode'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 353cf053716ac9958ad326543138f692df51c82e
[INFO] checking oOXuOo/leetcode against master#5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f for pr-87248
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FoOXuOo%2Fleetcode" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/oOXuOo/leetcode on toolchain 5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/oOXuOo/leetcode
[INFO] finished tweaking git repo https://github.com/oOXuOo/leetcode
[INFO] tweaked toml for git repo https://github.com/oOXuOo/leetcode written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/oOXuOo/leetcode already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "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] 0f43fff9a1a248b706f1df4c66636a9cc239209fd8b3ab1385a6d1a06f797da5
[INFO] running `Command { std: "docker" "start" "-a" "0f43fff9a1a248b706f1df4c66636a9cc239209fd8b3ab1385a6d1a06f797da5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0f43fff9a1a248b706f1df4c66636a9cc239209fd8b3ab1385a6d1a06f797da5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0f43fff9a1a248b706f1df4c66636a9cc239209fd8b3ab1385a6d1a06f797da5", kill_on_drop: false }`
[INFO] [stdout] 0f43fff9a1a248b706f1df4c66636a9cc239209fd8b3ab1385a6d1a06f797da5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "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] f7ccacc9416d36fc591a661fb969bc8d13cc959e4d76c8e1200dccec7edee040
[INFO] running `Command { std: "docker" "start" "-a" "f7ccacc9416d36fc591a661fb969bc8d13cc959e4d76c8e1200dccec7edee040", kill_on_drop: false }`
[INFO] [stderr]     Checking leetcode v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused macro definition
[INFO] [stdout]   --> src/dynamic_programming/longest_str_chain.rs:62:1
[INFO] [stdout]    |
[INFO] [stdout] 62 | / macro_rules! vec_of_strings {
[INFO] [stdout] 63 | |     ($($x:expr),*) => (vec![$($x.to_string()),*]);
[INFO] [stdout] 64 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_macros)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/backtracking/restore_ip_addresses.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 12 | 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: `restore_ip_addresses`
[INFO] [stdout]   --> src/backtracking/restore_ip_addresses.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 15 |     pub fn restore_ip_addresses(s: String) -> Vec<String> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/dynamic_programming/triangle.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub struct Solution {}
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `minimum_total`
[INFO] [stdout]   --> src/dynamic_programming/triangle.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 15 |     pub fn minimum_total(triangle: Vec<Vec<i32>>) -> i32 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `cache_i_j`
[INFO] [stdout]   --> src/dynamic_programming/triangle.rs:42:4
[INFO] [stdout]    |
[INFO] [stdout] 42 | fn cache_i_j(triangle: &Vec<Vec<i32>>,
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/dynamic_programming/coin_change.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct Solution {}
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `coin_change`
[INFO] [stdout]   --> src/dynamic_programming/coin_change.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub fn coin_change(coins: Vec<i32>, amount: i32) -> i32 {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `inner`
[INFO] [stdout]   --> src/dynamic_programming/coin_change.rs:21:4
[INFO] [stdout]    |
[INFO] [stdout] 21 | fn inner(coins: &Vec<i32>, amount: i32,
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/dynamic_programming/integer_break.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub struct Solution {}
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `integer_break`
[INFO] [stdout]   --> src/dynamic_programming/integer_break.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 16 |     pub fn integer_break(n: i32) -> i32 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `inner`
[INFO] [stdout]   --> src/dynamic_programming/integer_break.rs:22:4
[INFO] [stdout]    |
[INFO] [stdout] 22 | fn inner(n: i32, sub_map: &mut HashMap<i32, i32>) -> i32 {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/dynamic_programming/longest_str_chain.rs:14:12
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub struct Solution {}
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `longest_str_chain`
[INFO] [stdout]   --> src/dynamic_programming/longest_str_chain.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 17 |     pub fn longest_str_chain(words: Vec<String>) -> i32 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `inner`
[INFO] [stdout]   --> src/dynamic_programming/longest_str_chain.rs:28:4
[INFO] [stdout]    |
[INFO] [stdout] 28 | fn inner(word: &String, words: &Vec<String>,
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `get_index`
[INFO] [stdout]   --> src/dynamic_programming/longest_str_chain.rs:54:4
[INFO] [stdout]    |
[INFO] [stdout] 54 | fn get_index(name: &String, array: &Vec<String>) -> Option<usize> {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/dynamic_programming/burst_balloons.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub struct Solution {}
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `max_coins`
[INFO] [stdout]   --> src/dynamic_programming/burst_balloons.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 15 |     pub fn max_coins(mut nums: Vec<i32>) -> i32 {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `get_max`
[INFO] [stdout]   --> src/dynamic_programming/burst_balloons.rs:23:4
[INFO] [stdout]    |
[INFO] [stdout] 23 | fn get_max(nums: &Vec<i32>, sub_map: &mut Vec<Vec<i32>>,
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `cache_get_sub`
[INFO] [stdout]   --> src/dynamic_programming/burst_balloons.rs:37:4
[INFO] [stdout]    |
[INFO] [stdout] 37 | fn cache_get_sub(nums: &Vec<i32>, sub_map: &mut Vec<Vec<i32>>,
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/dynamic_programming/max_sub_array.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub struct Solution {}
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `max_sub_array`
[INFO] [stdout]   --> src/dynamic_programming/max_sub_array.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 11 |     pub fn max_sub_array(nums: Vec<i32>) -> i32 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/dynamic_programming/last_stone.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct Solution {}
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `last_stone_weight_ii`
[INFO] [stdout]  --> src/dynamic_programming/last_stone.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 |     pub fn last_stone_weight_ii(stones: Vec<i32>) -> i32 {
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `get_max`
[INFO] [stdout]   --> src/dynamic_programming/last_stone.rs:15:4
[INFO] [stdout]    |
[INFO] [stdout] 15 | fn get_max(top_v: i32, top_i: usize, stones: &Vec<i32>,
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/divide_and_conquer/create_maximum_number.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub struct Solution {}
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `max_number`
[INFO] [stdout]   --> src/divide_and_conquer/create_maximum_number.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 15 |     pub fn max_number(nums1: Vec<i32>, nums2: Vec<i32>, k: i32) -> Vec<i32> {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `get_max_range`
[INFO] [stdout]   --> src/divide_and_conquer/create_maximum_number.rs:32:4
[INFO] [stdout]    |
[INFO] [stdout] 32 | fn get_max_range(nums: &Vec<i32>, cnt: usize) -> Vec<i32> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `merge_max_range`
[INFO] [stdout]   --> src/divide_and_conquer/create_maximum_number.rs:51:4
[INFO] [stdout]    |
[INFO] [stdout] 51 | fn merge_max_range(v1: &[i32], v2: &[i32]) -> Vec<i32> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `vector_compare`
[INFO] [stdout]   --> src/divide_and_conquer/create_maximum_number.rs:75:4
[INFO] [stdout]    |
[INFO] [stdout] 75 | fn vector_compare(v1: &[i32], v2: &[i32]) -> i32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/divide_and_conquer/longest_substring_with_at_least_k_repeating_characters.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub struct Solution {}
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `longest_substring`
[INFO] [stdout]   --> src/divide_and_conquer/longest_substring_with_at_least_k_repeating_characters.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 12 |     pub fn longest_substring(s: String, k: i32) -> i32 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `inner`
[INFO] [stdout]   --> src/divide_and_conquer/longest_substring_with_at_least_k_repeating_characters.rs:19:4
[INFO] [stdout]    |
[INFO] [stdout] 19 | fn inner(str: &Vec<char>, k: i32) -> i32 {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/sort/merge_intervals.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub struct Solution {}
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `merge`
[INFO] [stdout]   --> src/sort/merge_intervals.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 12 |     pub fn merge(mut intervals: Vec<Vec<i32>>) -> Vec<Vec<i32>> {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/sort/smallest_k.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct Solution {}
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `smallest_k`
[INFO] [stdout]  --> src/sort/smallest_k.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 |     pub fn smallest_k(mut arr: Vec<i32>, k1: i32) -> Vec<i32> {
[INFO] [stdout]   |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `build_big_heap`
[INFO] [stdout]   --> src/sort/smallest_k.rs:22:4
[INFO] [stdout]    |
[INFO] [stdout] 22 | fn build_big_heap(nums: &mut [i32]) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `heapify`
[INFO] [stdout]   --> src/sort/smallest_k.rs:28:4
[INFO] [stdout]    |
[INFO] [stdout] 28 | fn heapify(nums: &mut [i32], root: usize) {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `swap`
[INFO] [stdout]   --> src/sort/smallest_k.rs:39:4
[INFO] [stdout]    |
[INFO] [stdout] 39 | fn swap(nums: &mut [i32], i: usize, j: usize) {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/basic/zigzag_conversion.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub struct Solution{}
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `convert`
[INFO] [stdout]   --> src/basic/zigzag_conversion.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 15 |     pub fn convert(s: String, n: i32) -> String {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/basic/first_missing_positive.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct Solution {}
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `first_missing_positive`
[INFO] [stdout]  --> src/basic/first_missing_positive.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 |     pub fn first_missing_positive(nums: Vec<i32>) -> i32 {
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/basic/roman_to_int.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct Solution {}
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `roman_to_int`
[INFO] [stdout]  --> src/basic/roman_to_int.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 |     pub fn roman_to_int(s: String) -> i32 {
[INFO] [stdout]   |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/basic/two_sum.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct Solution {}
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `two_sum`
[INFO] [stdout]   --> src/basic/two_sum.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub fn two_sum(nums: Vec<i32>, target: i32) -> Vec<i32> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/greedy/candy.rs:14:12
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub struct Solution {}
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `candy`
[INFO] [stdout]   --> src/greedy/candy.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 17 |     pub fn candy(ratings: Vec<i32>) -> i32 {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `back_trace`
[INFO] [stdout]   --> src/greedy/candy.rs:37:4
[INFO] [stdout]    |
[INFO] [stdout] 37 | fn back_trace(ratings: &Vec<i32>, v: &mut Vec<i32>, index: usize) {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/two_pointers/three_sum.rs:7:12
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub struct Solution {}
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `three_sum`
[INFO] [stdout]   --> src/two_pointers/three_sum.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub fn three_sum(mut nums: Vec<i32>) -> Vec<Vec<i32>> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/two_pointers/four_sum.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub struct Solution {}
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `four_sum`
[INFO] [stdout]   --> src/two_pointers/four_sum.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 12 |     pub fn four_sum(mut nums: Vec<i32>, target: i32) -> Vec<Vec<i32>> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `sort_and_uniq`
[INFO] [stdout]   --> src/two_pointers/four_sum.rs:43:4
[INFO] [stdout]    |
[INFO] [stdout] 43 | fn sort_and_uniq(nums: &mut Vec<i32>, n: usize) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/two_pointers/container_with_most_water.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub struct Solution {}
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `max_area`
[INFO] [stdout]   --> src/two_pointers/container_with_most_water.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 12 |     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/two_pointers/trapping_rain_water.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct Solution {}
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `trap`
[INFO] [stdout]   --> src/two_pointers/trapping_rain_water.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub fn trap(v: Vec<i32>) -> i32 {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `inner_trap`
[INFO] [stdout]   --> src/two_pointers/trapping_rain_water.rs:20:4
[INFO] [stdout]    |
[INFO] [stdout] 20 | fn inner_trap(v: &Vec<i32>, mut left: usize, mut right: usize) -> i32 {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `calculate`
[INFO] [stdout]   --> src/two_pointers/trapping_rain_water.rs:40:4
[INFO] [stdout]    |
[INFO] [stdout] 40 | fn calculate(v: &Vec<i32>, left: usize, right: usize) -> i32{
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 62 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.97s
[INFO] running `Command { std: "docker" "inspect" "f7ccacc9416d36fc591a661fb969bc8d13cc959e4d76c8e1200dccec7edee040", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f7ccacc9416d36fc591a661fb969bc8d13cc959e4d76c8e1200dccec7edee040", kill_on_drop: false }`
[INFO] [stdout] f7ccacc9416d36fc591a661fb969bc8d13cc959e4d76c8e1200dccec7edee040