[INFO] updating cached repository https://github.com/joelhy/leetcode-in-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/joelhy/leetcode-in-rust
[INFO] [stderr]    dc9b3d5..82608a1  master     -> master
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 82608a1890d4791bf5cda7a0b6c6842e363ed554
[INFO] checking joelhy/leetcode-in-rust against try#c846f8a7dc7af09647f397f047db9cc81acb60bd for pr-69129
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjoelhy%2Fleetcode-in-rust" "/workspace/builds/worker-7/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/joelhy/leetcode-in-rust on toolchain c846f8a7dc7af09647f397f047db9cc81acb60bd
[INFO] running `"/workspace/cargo-home/bin/cargo" "+c846f8a7dc7af09647f397f047db9cc81acb60bd" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/joelhy/leetcode-in-rust
[INFO] finished tweaking git repo https://github.com/joelhy/leetcode-in-rust
[INFO] tweaked toml for git repo https://github.com/joelhy/leetcode-in-rust written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/joelhy/leetcode-in-rust already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+c846f8a7dc7af09647f397f047db9cc81acb60bd" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+c846f8a7dc7af09647f397f047db9cc81acb60bd" "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] 1c18722172d241832240c4ad4bd6819879e9d133b5e8e5a243114bccfb388e07
[INFO] running `"docker" "start" "-a" "1c18722172d241832240c4ad4bd6819879e9d133b5e8e5a243114bccfb388e07"`
[INFO] [stderr]     Checking leetcode-in-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/n0002_add_two_numbers.rs:48:1
[INFO] [stderr]    |
[INFO] [stderr] 48 | / macro_rules! linkedlist {
[INFO] [stderr] 49 | |     () => {
[INFO] [stderr] 50 | |         None
[INFO] [stderr] 51 | |     };
[INFO] [stderr] ...  |
[INFO] [stderr] 65 | |     };
[INFO] [stderr] 66 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_macros)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/n0083_remove_duplicates_from_sorted_list.rs:39:1
[INFO] [stderr]    |
[INFO] [stderr] 39 | / macro_rules! linkedlist {
[INFO] [stderr] 40 | |     () => {
[INFO] [stderr] 41 | |         None
[INFO] [stderr] 42 | |     };
[INFO] [stderr] ...  |
[INFO] [stderr] 56 | |     };
[INFO] [stderr] 57 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/n0100_same_tree.rs:55:1
[INFO] [stderr]    |
[INFO] [stderr] 55 | / macro_rules! tree {
[INFO] [stderr] 56 | |     () => {
[INFO] [stderr] 57 | |         None
[INFO] [stderr] 58 | |     };
[INFO] [stderr] ...  |
[INFO] [stderr] 66 | |     ($($e:expr,)*) => {(tree![$($e),*])};
[INFO] [stderr] 67 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/n0001_two_sum.rs:1:8
[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/n0001_two_sum.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     pub fn two_sum(nums: Vec<i32>, target: i32) -> Vec<i32> {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/n0002_add_two_numbers.rs:10:3
[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/n0002_add_two_numbers.rs:17:8
[INFO] [stderr]    |
[INFO] [stderr] 17 | struct Solution {}
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `add_two_numbers`
[INFO] [stderr]   --> src/n0002_add_two_numbers.rs:20:5
[INFO] [stderr]    |
[INFO] [stderr] 20 |     pub fn add_two_numbers(l1: Option<Box<ListNode>>, l2: Option<Box<ListNode>>) -> Option<Box<ListNode>> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/n0003_longest_substring_without_repeating_characters.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution {}
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `length_of_longest_substring`
[INFO] [stderr]  --> src/n0003_longest_substring_without_repeating_characters.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     pub fn length_of_longest_substring(s: String) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/n0005_longest_palindromic_substring.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution {}
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `find_palindrome`
[INFO] [stderr]  --> src/n0005_longest_palindromic_substring.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     fn find_palindrome(s: &str, mut left: usize, mut right: usize) -> &str {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `longest_palindrome`
[INFO] [stderr]   --> src/n0005_longest_palindromic_substring.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 |     pub fn longest_palindrome(s: String) -> String {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/n0006_zigzag_conversion.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution {}
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `convert`
[INFO] [stderr]  --> src/n0006_zigzag_conversion.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn convert(s: String, num_rows: i32) -> String {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/n0007_reverse_integer.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution {}
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `reverse`
[INFO] [stderr]  --> src/n0007_reverse_integer.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn reverse(x: i32) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/n0008_string_to_integer_atoi.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution {}
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `my_atoi`
[INFO] [stderr]  --> src/n0008_string_to_integer_atoi.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn my_atoi(input: String) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/n0009_palindrome_number.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution {}
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_palindrome`
[INFO] [stderr]  --> src/n0009_palindrome_number.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn is_palindrome(x: i32) -> bool {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `reverse`
[INFO] [stderr]   --> src/n0009_palindrome_number.rs:12:12
[INFO] [stderr]    |
[INFO] [stderr] 12 |         fn reverse(x: i32) -> i32 {
[INFO] [stderr]    |            ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/n0011_container_with_most_water.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution {}
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `max_area`
[INFO] [stderr]  --> src/n0011_container_with_most_water.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn max_area(height: Vec<i32>) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/n0012_integer_to_roman.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution {}
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `int_to_roman`
[INFO] [stderr]  --> src/n0012_integer_to_roman.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn int_to_roman(num: i32) -> String {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/n0013_roman_to_integer.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution {}
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `roman_to_int`
[INFO] [stderr]  --> src/n0013_roman_to_integer.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn roman_to_int(s: String) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `roman_char_to_int`
[INFO] [stderr]  --> src/n0013_roman_to_integer.rs:5:12
[INFO] [stderr]   |
[INFO] [stderr] 5 |         fn roman_char_to_int(c: char) -> i32 {
[INFO] [stderr]   |            ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/n0014_longest_common_prefix.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution {}
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `longest_common_prefix`
[INFO] [stderr]  --> src/n0014_longest_common_prefix.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     pub fn longest_common_prefix(strs: Vec<String>) -> String {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/n0015_3sum.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution {}
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `three_sum`
[INFO] [stderr]  --> src/n0015_3sum.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn three_sum(nums: Vec<i32>) -> Vec<Vec<i32>> {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/n0016_3sum_closest.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution {}
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `three_sum_closest`
[INFO] [stderr]  --> src/n0016_3sum_closest.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn three_sum_closest(nums: Vec<i32>, target: i32) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/n0020_valid_parentheses.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution {}
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_valid`
[INFO] [stderr]  --> src/n0020_valid_parentheses.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn is_valid(s: String) -> bool {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/n0021_merge_two_sorted_lists.rs:10:3
[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/n0021_merge_two_sorted_lists.rs:18:8
[INFO] [stderr]    |
[INFO] [stderr] 18 | struct Solution {}
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `merge_two_lists`
[INFO] [stderr]   --> src/n0021_merge_two_sorted_lists.rs:21:5
[INFO] [stderr]    |
[INFO] [stderr] 21 |     pub fn merge_two_lists(l1: Option<Box<ListNode>>, l2: Option<Box<ListNode>>) -> Option<Box<ListNode>> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/n0026_remove_duplicates_from_sorted_array.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution {}
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `remove_duplicates`
[INFO] [stderr]  --> src/n0026_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/n0027_remove_element.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution {}
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `remove_element`
[INFO] [stderr]  --> src/n0027_remove_element.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     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/n0028_implement_strstr.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution {}
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `str_str`
[INFO] [stderr]  --> src/n0028_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/n0035_search_insert_position.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution {}
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `search_insert`
[INFO] [stderr]  --> src/n0035_search_insert_position.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     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/n0038_count_and_say.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution {}
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `count_and_say`
[INFO] [stderr]  --> src/n0038_count_and_say.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     pub fn count_and_say(n: i32) -> String {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/n0053_maximum_subarray.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution {}
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `max_sub_array`
[INFO] [stderr]  --> src/n0053_maximum_subarray.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn max_sub_array(nums: Vec<i32>) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/n0058_length_of_last_word.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution {}
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `length_of_last_word`
[INFO] [stderr]  --> src/n0058_length_of_last_word.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn length_of_last_word(s: String) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/n0066_plus_one.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution {}
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `plus_one`
[INFO] [stderr]  --> src/n0066_plus_one.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn plus_one(digits: Vec<i32>) -> Vec<i32> {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/n0067_add_binary.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution {}
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `add_binary`
[INFO] [stderr]  --> src/n0067_add_binary.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn add_binary(a: String, b: String) -> String {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/n0069_sqrtx.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution {}
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `my_sqrt`
[INFO] [stderr]  --> src/n0069_sqrtx.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn my_sqrt(x: i32) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/n0070_climbing_stairs.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution {}
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `climb_stairs`
[INFO] [stderr]  --> src/n0070_climbing_stairs.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn climb_stairs(n: i32) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/n0083_remove_duplicates_from_sorted_list.rs:10:3
[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/n0083_remove_duplicates_from_sorted_list.rs:18:8
[INFO] [stderr]    |
[INFO] [stderr] 18 | struct Solution {}
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `delete_duplicates`
[INFO] [stderr]   --> src/n0083_remove_duplicates_from_sorted_list.rs:21:5
[INFO] [stderr]    |
[INFO] [stderr] 21 |     pub fn delete_duplicates(head: Option<Box<ListNode>>) -> Option<Box<ListNode>> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/n0088_merge_sorted_array.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution {}
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `merge`
[INFO] [stderr]  --> src/n0088_merge_sorted_array.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn merge(nums1: &mut Vec<i32>, m: i32, nums2: &mut Vec<i32>, n: i32) {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/n0100_same_tree.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution {}
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/n0100_same_tree.rs:13:3
[INFO] [stderr]    |
[INFO] [stderr] 13 |   pub fn new(val: i32) -> Self {
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_same_tree`
[INFO] [stderr]   --> src/n0100_same_tree.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 24 |     pub fn is_same_tree(p: Option<Rc<RefCell<TreeNode>>>, q: Option<Rc<RefCell<TreeNode>>>) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `to_tree`
[INFO] [stderr]   --> src/n0100_same_tree.rs:33:8
[INFO] [stderr]    |
[INFO] [stderr] 33 | pub fn to_tree(vec: Vec<Option<i32>>) -> Option<Rc<RefCell<TreeNode>>> {
[INFO] [stderr]    |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/n0021_merge_two_sorted_lists.rs:10:3
[INFO] [stderr]    |
[INFO] [stderr] 10 |   fn new(val: i32) -> Self {
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.87s
[INFO] running `"docker" "inspect" "1c18722172d241832240c4ad4bd6819879e9d133b5e8e5a243114bccfb388e07"`
[INFO] running `"docker" "rm" "-f" "1c18722172d241832240c4ad4bd6819879e9d133b5e8e5a243114bccfb388e07"`
[INFO] [stdout] 1c18722172d241832240c4ad4bd6819879e9d133b5e8e5a243114bccfb388e07