[INFO] updating cached repository chux0519/leetcode-rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/chux0519/leetcode-rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/chux0519/leetcode-rust" "work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/chux0519/leetcode-rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/chux0519/leetcode-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/chux0519/leetcode-rust" "work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/chux0519/leetcode-rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/chux0519/leetcode-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 5aa3cdcb94d93a58816e5bdc2e0c904ff0c0461f
[INFO] sha for GitHub repo chux0519/leetcode-rust: 5aa3cdcb94d93a58816e5bdc2e0c904ff0c0461f
[INFO] validating manifest of chux0519/leetcode-rust on toolchain master#60960a260f7b5c695fd0717311d72ce62dd4eb43
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of chux0519/leetcode-rust on toolchain try#266783e4e09e4e9d5307c1c8e695659c58bbcac7
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing chux0519/leetcode-rust
[INFO] finished frobbing chux0519/leetcode-rust
[INFO] frobbed toml for chux0519/leetcode-rust written to work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/chux0519/leetcode-rust/Cargo.toml
[INFO] started frobbing chux0519/leetcode-rust
[INFO] finished frobbing chux0519/leetcode-rust
[INFO] frobbed toml for chux0519/leetcode-rust written to work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/chux0519/leetcode-rust/Cargo.toml
[INFO] crate chux0519/leetcode-rust already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] checking chux0519/leetcode-rust against try#266783e4e09e4e9d5307c1c8e695659c58bbcac7 for pr-63376
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63376/worker-3/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/chux0519/leetcode-rust:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] cf0b509b6806b9735ac9c28c49a630be9cd96a78e8c364de197d384dc0e2f135
[INFO] running `"docker" "start" "-a" "cf0b509b6806b9735ac9c28c49a630be9cd96a78e8c364de197d384dc0e2f135"`
[INFO] [stderr]     Checking leetcode-rust v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unnecessary parentheses around assigned value
[INFO] [stderr]   --> src/q1052_grumpy_bookstore_owner.rs:23:26
[INFO] [stderr]    |
[INFO] [stderr] 23 |                   sum_x += (if (p + offset < len) && grumpy[p + offset] == 1 {
[INFO] [stderr]    |  __________________________^
[INFO] [stderr] 24 | |                     customers[p + offset]
[INFO] [stderr] 25 | |                 } else {
[INFO] [stderr] 26 | |                     0
[INFO] [stderr] 27 | |                 });
[INFO] [stderr]    | |__________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 23 |                 sum_x += if (p + offset < len) && grumpy[p + offset] == 1 {
[INFO] [stderr] 24 |                     customers[p + offset]
[INFO] [stderr] 25 |                 } else {
[INFO] [stderr] 26 |                     0
[INFO] [stderr] 27 |                 };
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around assigned value
[INFO] [stderr]   --> src/q1052_grumpy_bookstore_owner.rs:23:26
[INFO] [stderr]    |
[INFO] [stderr] 23 |                   sum_x += (if (p + offset < len) && grumpy[p + offset] == 1 {
[INFO] [stderr]    |  __________________________^
[INFO] [stderr] 24 | |                     customers[p + offset]
[INFO] [stderr] 25 | |                 } else {
[INFO] [stderr] 26 | |                     0
[INFO] [stderr] 27 | |                 });
[INFO] [stderr]    | |__________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 23 |                 sum_x += if (p + offset < len) && grumpy[p + offset] == 1 {
[INFO] [stderr] 24 |                     customers[p + offset]
[INFO] [stderr] 25 |                 } else {
[INFO] [stderr] 26 |                     0
[INFO] [stderr] 27 |                 };
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `super::Solution`
[INFO] [stderr]   --> src/q1054_distant_barcodes.rs:73:9
[INFO] [stderr]    |
[INFO] [stderr] 73 |     use super::Solution;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `prev` is never read
[INFO] [stderr]   --> src/q025_reverse_nodes_in_k_group.rs:48:21
[INFO] [stderr]    |
[INFO] [stderr] 48 |             let mut prev = None::<Box<ListNode>>;
[INFO] [stderr]    |                     ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `num` is never read
[INFO] [stderr]   --> src/q1048_longest_string_chain.rs:17:25
[INFO] [stderr]    |
[INFO] [stderr] 17 |                 let mut num = 0;
[INFO] [stderr]    |                         ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/q001_two_sum.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `two_sum`
[INFO] [stderr]  --> src/q001_two_sum.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     pub fn two_sum(nums: Vec<i32>, target: i32) -> Vec<i32> {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `two_pass_hashmap`
[INFO] [stderr]   --> src/q001_two_sum.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 |     pub fn two_pass_hashmap(nums: Vec<i32>, target: i32) -> Vec<i32> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `one_pass_hashmap`
[INFO] [stderr]   --> src/q001_two_sum.rs:40:5
[INFO] [stderr]    |
[INFO] [stderr] 40 |     pub fn one_pass_hashmap(nums: Vec<i32>, target: i32) -> Vec<i32> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]   --> src/q023_merge_k_lists.rs:30:1
[INFO] [stderr]    |
[INFO] [stderr] 30 | struct Solution;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/q023_merge_k_lists.rs:41:5
[INFO] [stderr]    |
[INFO] [stderr] 41 |     fn new(val: i32) -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `merge_k_lists`
[INFO] [stderr]   --> src/q023_merge_k_lists.rs:48:5
[INFO] [stderr]    |
[INFO] [stderr] 48 |     pub fn merge_k_lists(lists: Vec<Option<Box<ListNode>>>) -> Option<Box<ListNode>> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `merge_using_heap`
[INFO] [stderr]   --> src/q023_merge_k_lists.rs:56:5
[INFO] [stderr]    |
[INFO] [stderr] 56 |     pub fn merge_using_heap(lists: Vec<Option<Box<ListNode>>>) -> Option<Box<ListNode>> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `next`
[INFO] [stderr]   --> src/q023_merge_k_lists.rs:68:5
[INFO] [stderr]    |
[INFO] [stderr] 68 | /     pub fn next(
[INFO] [stderr] 69 | |         mut lists: Vec<Option<Box<ListNode>>>,
[INFO] [stderr] 70 | |         heap: &mut BinaryHeap<Node>,
[INFO] [stderr] 71 | |     ) -> Option<Box<ListNode>> {
[INFO] [stderr] ...  |
[INFO] [stderr] 81 | |         })
[INFO] [stderr] 82 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `merge_two_lists`
[INFO] [stderr]   --> src/q023_merge_k_lists.rs:85:1
[INFO] [stderr]    |
[INFO] [stderr] 85 | fn merge_two_lists(l1: Option<Box<ListNode>>, l2: Option<Box<ListNode>>) -> Option<Box<ListNode>> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/q024_swap_nodes_in_pairs.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     fn new(val: i32) -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]   --> src/q024_swap_nodes_in_pairs.rs:15:1
[INFO] [stderr]    |
[INFO] [stderr] 15 | struct Solution;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `swap_pairs`
[INFO] [stderr]   --> src/q024_swap_nodes_in_pairs.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 |     pub fn swap_pairs(head: Option<Box<ListNode>>) -> Option<Box<ListNode>> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/q025_reverse_nodes_in_k_group.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     fn new(val: i32) -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]   --> src/q025_reverse_nodes_in_k_group.rs:15:1
[INFO] [stderr]    |
[INFO] [stderr] 15 | struct Solution;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `reverse_k_group`
[INFO] [stderr]   --> src/q025_reverse_nodes_in_k_group.rs:21:5
[INFO] [stderr]    |
[INFO] [stderr] 21 |     pub fn reverse_k_group(head: Option<Box<ListNode>>, k: i32) -> Option<Box<ListNode>> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/q026_remove_duplicates_from_sorted_array.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `remove_duplicates`
[INFO] [stderr]  --> src/q026_remove_duplicates_from_sorted_array.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn remove_duplicates(nums: &mut Vec<i32>) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/q027_remove_element.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `remove_element`
[INFO] [stderr]  --> src/q027_remove_element.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     pub fn remove_element(nums: &mut Vec<i32>, val: i32) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/q028_implement_strstr.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `str_str`
[INFO] [stderr]  --> src/q028_implement_strstr.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn str_str(haystack: String, needle: String) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/q029_divide_two_integers.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `divide`
[INFO] [stderr]  --> src/q029_divide_two_integers.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     pub fn divide(dividend: i32, divisor: i32) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/q031_next_permutation.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `next_permutation`
[INFO] [stderr]  --> src/q031_next_permutation.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     pub fn next_permutation(nums: &mut Vec<i32>) {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/q032_longest_valid_parentheses.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `longest_valid_parentheses`
[INFO] [stderr]  --> src/q032_longest_valid_parentheses.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn longest_valid_parentheses(s: String) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/q033_search_in_rotated_sorted_array.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `search`
[INFO] [stderr]  --> src/q033_search_in_rotated_sorted_array.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     pub fn search(nums: Vec<i32>, target: i32) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/q034_find_first_and_last_position_of_element_in_sorted_array.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `search_range`
[INFO] [stderr]  --> src/q034_find_first_and_last_position_of_element_in_sorted_array.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     pub fn search_range(nums: Vec<i32>, target: i32) -> Vec<i32> {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/q035_search_insert_position.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | struct Solution;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `search_insert`
[INFO] [stderr]  --> src/q035_search_insert_position.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     pub fn search_insert(nums: Vec<i32>, target: i32) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/q036_valid_sudoku.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_valid_sudoku`
[INFO] [stderr]  --> src/q036_valid_sudoku.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     pub fn is_valid_sudoku(board: Vec<Vec<char>>) -> bool {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `init_table`
[INFO] [stderr]   --> src/q036_valid_sudoku.rs:46:5
[INFO] [stderr]    |
[INFO] [stderr] 46 |     fn init_table() -> HashMap<char, bool> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `check`
[INFO] [stderr]   --> src/q036_valid_sudoku.rs:53:5
[INFO] [stderr]    |
[INFO] [stderr] 53 |     fn check(ch: &char, h: &mut HashMap<char, bool>) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/q037_sudoku_solver.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `solve_sudoku`
[INFO] [stderr]  --> src/q037_sudoku_solver.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn solve_sudoku(board: &mut Vec<Vec<char>>) {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `solve`
[INFO] [stderr]  --> src/q037_sudoku_solver.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     fn solve(board: &mut Vec<Vec<char>>) -> bool {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_valid`
[INFO] [stderr]   --> src/q037_sudoku_solver.rs:29:5
[INFO] [stderr]    |
[INFO] [stderr] 29 |     fn is_valid(board: &Vec<Vec<char>>, x: usize, y: usize, c: char) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/q038_count_and_say.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `count_and_say`
[INFO] [stderr]  --> src/q038_count_and_say.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn count_and_say(n: i32) -> String {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/q039_combination_sum.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `combination_sum`
[INFO] [stderr]  --> src/q039_combination_sum.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn combination_sum(candidates: Vec<i32>, target: i32) -> Vec<Vec<i32>> {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `combine_recursive`
[INFO] [stderr]  --> src/q039_combination_sum.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     fn combine_recursive(candidates: &Vec<i32>, target: i32, start: usize) -> Vec<Vec<i32>> {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/q0416_partition_equal_subset_sum.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `can_partition`
[INFO] [stderr]  --> src/q0416_partition_equal_subset_sum.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn can_partition(nums: Vec<i32>) -> bool {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/q1033_moving_stones_until_consecutive.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `num_moves_stones`
[INFO] [stderr]  --> src/q1033_moving_stones_until_consecutive.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn num_moves_stones(a: i32, b: i32, c: i32) -> Vec<i32> {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/q1046_last_stone_weight.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `last_stone_weight`
[INFO] [stderr]  --> src/q1046_last_stone_weight.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     pub fn last_stone_weight(stones: Vec<i32>) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/q1047_remove_all_adjacent_duplicates_in_string.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `remove_duplicates`
[INFO] [stderr]  --> src/q1047_remove_all_adjacent_duplicates_in_string.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     pub fn remove_duplicates(s: String) -> String {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/q1048_longest_string_chain.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `longest_str_chain`
[INFO] [stderr]  --> src/q1048_longest_string_chain.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     pub fn longest_str_chain(words: Vec<String>) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `toString`
[INFO] [stderr]   --> src/q1048_longest_string_chain.rs:32:1
[INFO] [stderr]    |
[INFO] [stderr] 32 | fn toString(str: &[u8]) -> String {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `concat`
[INFO] [stderr]   --> src/q1048_longest_string_chain.rs:36:1
[INFO] [stderr]    |
[INFO] [stderr] 36 | fn concat(str1: &[u8], str2: &[u8]) -> String {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/q1049_last_stone_weight_ii.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `last_stone_weight_ii`
[INFO] [stderr]  --> src/q1049_last_stone_weight_ii.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     pub fn last_stone_weight_ii(stones: Vec<i32>) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `last_stone_rec`
[INFO] [stderr]   --> src/q1049_last_stone_weight_ii.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     fn last_stone_rec(stones: &Vec<i32>, i: usize, sum_calculated: i32, sum_total: i32) -> i32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `last_stone_dp`
[INFO] [stderr]   --> src/q1049_last_stone_weight_ii.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 |     fn last_stone_dp(stones: &Vec<i32>, sum_total: i32) -> i32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/q1051_height_checker.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `height_checker`
[INFO] [stderr]  --> src/q1051_height_checker.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn height_checker(heights: Vec<i32>) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/q1052_grumpy_bookstore_owner.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `max_satisfied`
[INFO] [stderr]  --> src/q1052_grumpy_bookstore_owner.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn max_satisfied(customers: Vec<i32>, grumpy: Vec<i32>, x: i32) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/q1053_previous_permutation_with_one_swap.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `prev_perm_opt1`
[INFO] [stderr]  --> src/q1053_previous_permutation_with_one_swap.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn prev_perm_opt1(a: Vec<i32>) -> Vec<i32> {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]   --> src/q1054_distant_barcodes.rs:37:1
[INFO] [stderr]    |
[INFO] [stderr] 37 | struct Solution;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `rearrange_barcodes`
[INFO] [stderr]   --> src/q1054_distant_barcodes.rs:40:5
[INFO] [stderr]    |
[INFO] [stderr] 40 |     pub fn rearrange_barcodes(barcodes: Vec<i32>) -> Vec<i32> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/q1071_greatest_common_divisor_of_strings.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `gcd_of_strings`
[INFO] [stderr]  --> src/q1071_greatest_common_divisor_of_strings.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     pub fn gcd_of_strings(str1: String, str2: String) -> String {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/q1072_flip_columns_for_maximum_number_of_equal_rows.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `max_equal_rows_after_flips`
[INFO] [stderr]  --> src/q1072_flip_columns_for_maximum_number_of_equal_rows.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     pub fn max_equal_rows_after_flips(matrix: Vec<Vec<i32>>) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/q1073_adding_two_negabinary_numbers.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `add_negabinary`
[INFO] [stderr]  --> src/q1073_adding_two_negabinary_numbers.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 |     pub fn add_negabinary(arr1: Vec<i32>, arr2: Vec<i32>) -> Vec<i32> {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `toString` should have a snake case name
[INFO] [stderr]   --> src/q1048_longest_string_chain.rs:32:4
[INFO] [stderr]    |
[INFO] [stderr] 32 | fn toString(str: &[u8]) -> String {
[INFO] [stderr]    |    ^^^^^^^^ help: convert the identifier to snake case: `to_string`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `prev` is never read
[INFO] [stderr]   --> src/q025_reverse_nodes_in_k_group.rs:48:21
[INFO] [stderr]    |
[INFO] [stderr] 48 |             let mut prev = None::<Box<ListNode>>;
[INFO] [stderr]    |                     ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `num` is never read
[INFO] [stderr]   --> src/q1048_longest_string_chain.rs:17:25
[INFO] [stderr]    |
[INFO] [stderr] 17 |                 let mut num = 0;
[INFO] [stderr]    |                         ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `toString`
[INFO] [stderr]   --> src/q1048_longest_string_chain.rs:32:1
[INFO] [stderr]    |
[INFO] [stderr] 32 | fn toString(str: &[u8]) -> String {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `last_stone_rec`
[INFO] [stderr]   --> src/q1049_last_stone_weight_ii.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     fn last_stone_rec(stones: &Vec<i32>, i: usize, sum_calculated: i32, sum_total: i32) -> i32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]   --> src/q1054_distant_barcodes.rs:37:1
[INFO] [stderr]    |
[INFO] [stderr] 37 | struct Solution;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `rearrange_barcodes`
[INFO] [stderr]   --> src/q1054_distant_barcodes.rs:40:5
[INFO] [stderr]    |
[INFO] [stderr] 40 |     pub fn rearrange_barcodes(barcodes: Vec<i32>) -> Vec<i32> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `toString` should have a snake case name
[INFO] [stderr]   --> src/q1048_longest_string_chain.rs:32:4
[INFO] [stderr]    |
[INFO] [stderr] 32 | fn toString(str: &[u8]) -> String {
[INFO] [stderr]    |    ^^^^^^^^ help: convert the identifier to snake case: `to_string`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.20s
[INFO] running `"docker" "inspect" "cf0b509b6806b9735ac9c28c49a630be9cd96a78e8c364de197d384dc0e2f135"`
[INFO] running `"docker" "rm" "-f" "cf0b509b6806b9735ac9c28c49a630be9cd96a78e8c364de197d384dc0e2f135"`
[INFO] [stdout] cf0b509b6806b9735ac9c28c49a630be9cd96a78e8c364de197d384dc0e2f135