[INFO] cloning repository https://github.com/zhuangxxx/rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/zhuangxxx/rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzhuangxxx%2Frs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzhuangxxx%2Frs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c3e02c54736dacb87e554321c10f0c7ffbb1ad9c
[INFO] checking zhuangxxx/rs against try#45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4 for pr-83744
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzhuangxxx%2Frs" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/zhuangxxx/rs on toolchain 45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/zhuangxxx/rs
[INFO] finished tweaking git repo https://github.com/zhuangxxx/rs
[INFO] tweaked toml for git repo https://github.com/zhuangxxx/rs written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/zhuangxxx/rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 337fd9cb19d67670a0694e8ea94863ef2202b4818da32ca5930f4f3c3e680a15
[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" "337fd9cb19d67670a0694e8ea94863ef2202b4818da32ca5930f4f3c3e680a15", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "337fd9cb19d67670a0694e8ea94863ef2202b4818da32ca5930f4f3c3e680a15", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "337fd9cb19d67670a0694e8ea94863ef2202b4818da32ca5930f4f3c3e680a15", kill_on_drop: false }`
[INFO] [stdout] 337fd9cb19d67670a0694e8ea94863ef2202b4818da32ca5930f4f3c3e680a15
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a9fda02b93d35de201a74506ba9b28cc721048f808dafe28b4df709ee05a51fa
[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" "a9fda02b93d35de201a74506ba9b28cc721048f808dafe28b4df709ee05a51fa", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.84
[INFO] [stderr]    Compiling getrandom v0.2.2
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]     Checking rand_core v0.6.1
[INFO] [stderr]     Checking rand_chacha v0.3.0
[INFO] [stderr]     Checking rand v0.8.3
[INFO] [stderr]     Checking rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]  --> src/leetcode/q10_regular_expression_matching.rs:4:21
[INFO] [stdout]   |
[INFO] [stdout] 4 |     pub fn is_match(s: String, p: String) -> bool {
[INFO] [stdout]   |                     ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `p`
[INFO] [stdout]  --> src/leetcode/q10_regular_expression_matching.rs:4:32
[INFO] [stdout]   |
[INFO] [stdout] 4 |     pub fn is_match(s: String, p: String) -> bool {
[INFO] [stdout]   |                                ^ help: if this is intentional, prefix it with an underscore: `_p`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]  --> src/leetcode/q10_regular_expression_matching.rs:4:21
[INFO] [stdout]   |
[INFO] [stdout] 4 |     pub fn is_match(s: String, p: String) -> bool {
[INFO] [stdout]   |                     ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `p`
[INFO] [stdout]  --> src/leetcode/q10_regular_expression_matching.rs:4:32
[INFO] [stdout]   |
[INFO] [stdout] 4 |     pub fn is_match(s: String, p: String) -> bool {
[INFO] [stdout]   |                                ^ help: if this is intentional, prefix it with an underscore: `_p`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/leetcode/q1_two_sum.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | 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: `two_sum`
[INFO] [stdout]  --> src/leetcode/q1_two_sum.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 |     pub fn two_sum(nums: Vec<i32>, target: i32) -> Vec<i32> {
[INFO] [stdout]   |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `two_sum_iter`
[INFO] [stdout]   --> src/leetcode/q1_two_sum.rs:18:12
[INFO] [stdout]    |
[INFO] [stdout] 18 |     pub fn two_sum_iter(nums: Vec<i32>, target: i32) -> Vec<i32> {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/leetcode/q2_add_two_numbers.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 |     fn new(val: i32) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/leetcode/q2_add_two_numbers.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub struct Solution {}
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add_two_numbers`
[INFO] [stdout]   --> src/leetcode/q2_add_two_numbers.rs:18:12
[INFO] [stdout]    |
[INFO] [stdout] 18 |     pub fn add_two_numbers(
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add_two_numbers_match`
[INFO] [stdout]   --> src/leetcode/q2_add_two_numbers.rs:62:12
[INFO] [stdout]    |
[INFO] [stdout] 62 |     pub fn add_two_numbers_match(
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add_two_numbers_box`
[INFO] [stdout]    --> src/leetcode/q2_add_two_numbers.rs:103:12
[INFO] [stdout]     |
[INFO] [stdout] 103 |     pub fn add_two_numbers_box(
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/leetcode/q3_longest_substring_without_repeating_characters.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: `length_of_longest_substring`
[INFO] [stdout]  --> src/leetcode/q3_longest_substring_without_repeating_characters.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 |     pub fn length_of_longest_substring(s: String) -> i32 {
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `length_of_longest_substring_arr`
[INFO] [stdout]   --> src/leetcode/q3_longest_substring_without_repeating_characters.rs:35:12
[INFO] [stdout]    |
[INFO] [stdout] 35 |     pub fn length_of_longest_substring_arr(s: String) -> i32 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/leetcode/q4_median_of_two_sorted_arrays.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: `find_median_sorted_arrays`
[INFO] [stdout]  --> src/leetcode/q4_median_of_two_sorted_arrays.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 |     pub fn find_median_sorted_arrays(nums1: Vec<i32>, nums2: Vec<i32>) -> f64 {
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/leetcode/q5_longest_palindromic_substring.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_palindrome`
[INFO] [stdout]  --> src/leetcode/q5_longest_palindromic_substring.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 |     pub fn longest_palindrome(s: String) -> String {
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `longest_palindrome_2d_arr`
[INFO] [stdout]   --> src/leetcode/q5_longest_palindromic_substring.rs:48:12
[INFO] [stdout]    |
[INFO] [stdout] 48 |     pub fn longest_palindrome_2d_arr(s: String) -> String {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `center_spread`
[INFO] [stdout]   --> src/leetcode/q5_longest_palindromic_substring.rs:85:8
[INFO] [stdout]    |
[INFO] [stdout] 85 |     fn center_spread(s: &String, left: usize, right: usize) -> String {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `longest_palindrome_center_spread`
[INFO] [stdout]    --> src/leetcode/q5_longest_palindromic_substring.rs:103:12
[INFO] [stdout]     |
[INFO] [stdout] 103 |     pub fn longest_palindrome_center_spread(s: String) -> String {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/leetcode/q6_zigzag_conversion.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: `convert`
[INFO] [stdout]  --> src/leetcode/q6_zigzag_conversion.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 |     pub fn convert(s: String, num_rows: i32) -> String {
[INFO] [stdout]   |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `convert_once`
[INFO] [stdout]   --> src/leetcode/q6_zigzag_conversion.rs:39:12
[INFO] [stdout]    |
[INFO] [stdout] 39 |     pub fn convert_once(s: String, num_rows: i32) -> String {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/leetcode/q7_reverse_integer.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: `reverse`
[INFO] [stdout]  --> src/leetcode/q7_reverse_integer.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 |     pub fn reverse(x: i32) -> i32 {
[INFO] [stdout]   |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `reverse_div`
[INFO] [stdout]   --> src/leetcode/q7_reverse_integer.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 20 |     pub fn reverse_div(x: i32) -> i32 {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/leetcode/q8_string_to_integer_atoi.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: `my_atoi`
[INFO] [stdout]  --> src/leetcode/q8_string_to_integer_atoi.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 |     pub fn my_atoi(s: String) -> i32 {
[INFO] [stdout]   |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `my_atoi_ascii`
[INFO] [stdout]   --> src/leetcode/q8_string_to_integer_atoi.rs:43:12
[INFO] [stdout]    |
[INFO] [stdout] 43 |     pub fn my_atoi_ascii(s: String) -> i32 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/leetcode/q9_palindrome_number.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: `is_palindrome`
[INFO] [stdout]  --> src/leetcode/q9_palindrome_number.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 |     pub fn is_palindrome(x: i32) -> bool {
[INFO] [stdout]   |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_palindrome_string`
[INFO] [stdout]   --> src/leetcode/q9_palindrome_number.rs:24:12
[INFO] [stdout]    |
[INFO] [stdout] 24 |     pub fn is_palindrome_string(x: i32) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_palindrome_i32`
[INFO] [stdout]   --> src/leetcode/q9_palindrome_number.rs:28:12
[INFO] [stdout]    |
[INFO] [stdout] 28 |     pub fn is_palindrome_i32(x: i32) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/leetcode/q1_two_sum.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | 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: `two_sum`
[INFO] [stdout]  --> src/leetcode/q1_two_sum.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 |     pub fn two_sum(nums: Vec<i32>, target: i32) -> Vec<i32> {
[INFO] [stdout]   |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `two_sum_iter`
[INFO] [stdout]   --> src/leetcode/q1_two_sum.rs:18:12
[INFO] [stdout]    |
[INFO] [stdout] 18 |     pub fn two_sum_iter(nums: Vec<i32>, target: i32) -> Vec<i32> {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/leetcode/q2_add_two_numbers.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 |     fn new(val: i32) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/leetcode/q2_add_two_numbers.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub struct Solution {}
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add_two_numbers`
[INFO] [stdout]   --> src/leetcode/q2_add_two_numbers.rs:18:12
[INFO] [stdout]    |
[INFO] [stdout] 18 |     pub fn add_two_numbers(
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add_two_numbers_match`
[INFO] [stdout]   --> src/leetcode/q2_add_two_numbers.rs:62:12
[INFO] [stdout]    |
[INFO] [stdout] 62 |     pub fn add_two_numbers_match(
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: comparison is useless due to type limits
[INFO] [stdout]   --> src/leetcode/q5_longest_palindromic_substring.rs:89:15
[INFO] [stdout]    |
[INFO] [stdout] 89 |         while i >= 0 && j < len {
[INFO] [stdout]    |               ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_comparisons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add_two_numbers_box`
[INFO] [stdout]    --> src/leetcode/q2_add_two_numbers.rs:103:12
[INFO] [stdout]     |
[INFO] [stdout] 103 |     pub fn add_two_numbers_box(
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/leetcode/q3_longest_substring_without_repeating_characters.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: `length_of_longest_substring`
[INFO] [stdout]  --> src/leetcode/q3_longest_substring_without_repeating_characters.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 |     pub fn length_of_longest_substring(s: String) -> i32 {
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `length_of_longest_substring_arr`
[INFO] [stdout]   --> src/leetcode/q3_longest_substring_without_repeating_characters.rs:35:12
[INFO] [stdout]    |
[INFO] [stdout] 35 |     pub fn length_of_longest_substring_arr(s: String) -> i32 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/leetcode/q4_median_of_two_sorted_arrays.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: `find_median_sorted_arrays`
[INFO] [stdout]  --> src/leetcode/q4_median_of_two_sorted_arrays.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 |     pub fn find_median_sorted_arrays(nums1: Vec<i32>, nums2: Vec<i32>) -> f64 {
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/leetcode/q5_longest_palindromic_substring.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_palindrome`
[INFO] [stdout]  --> src/leetcode/q5_longest_palindromic_substring.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 |     pub fn longest_palindrome(s: String) -> String {
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `longest_palindrome_2d_arr`
[INFO] [stdout]   --> src/leetcode/q5_longest_palindromic_substring.rs:48:12
[INFO] [stdout]    |
[INFO] [stdout] 48 |     pub fn longest_palindrome_2d_arr(s: String) -> String {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `center_spread`
[INFO] [stdout]   --> src/leetcode/q5_longest_palindromic_substring.rs:85:8
[INFO] [stdout]    |
[INFO] [stdout] 85 |     fn center_spread(s: &String, left: usize, right: usize) -> String {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `longest_palindrome_center_spread`
[INFO] [stdout]    --> src/leetcode/q5_longest_palindromic_substring.rs:103:12
[INFO] [stdout]     |
[INFO] [stdout] 103 |     pub fn longest_palindrome_center_spread(s: String) -> String {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/leetcode/q6_zigzag_conversion.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: `convert`
[INFO] [stdout]  --> src/leetcode/q6_zigzag_conversion.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 |     pub fn convert(s: String, num_rows: i32) -> String {
[INFO] [stdout]   |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `convert_once`
[INFO] [stdout]   --> src/leetcode/q6_zigzag_conversion.rs:39:12
[INFO] [stdout]    |
[INFO] [stdout] 39 |     pub fn convert_once(s: String, num_rows: i32) -> String {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/leetcode/q7_reverse_integer.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: `reverse`
[INFO] [stdout]  --> src/leetcode/q7_reverse_integer.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 |     pub fn reverse(x: i32) -> i32 {
[INFO] [stdout]   |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `reverse_div`
[INFO] [stdout]   --> src/leetcode/q7_reverse_integer.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 20 |     pub fn reverse_div(x: i32) -> i32 {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/leetcode/q8_string_to_integer_atoi.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: `my_atoi`
[INFO] [stdout]  --> src/leetcode/q8_string_to_integer_atoi.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 |     pub fn my_atoi(s: String) -> i32 {
[INFO] [stdout]   |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `my_atoi_ascii`
[INFO] [stdout]   --> src/leetcode/q8_string_to_integer_atoi.rs:43:12
[INFO] [stdout]    |
[INFO] [stdout] 43 |     pub fn my_atoi_ascii(s: String) -> i32 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/leetcode/q9_palindrome_number.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: `is_palindrome`
[INFO] [stdout]  --> src/leetcode/q9_palindrome_number.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 |     pub fn is_palindrome(x: i32) -> bool {
[INFO] [stdout]   |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_palindrome_string`
[INFO] [stdout]   --> src/leetcode/q9_palindrome_number.rs:24:12
[INFO] [stdout]    |
[INFO] [stdout] 24 |     pub fn is_palindrome_string(x: i32) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 34 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_palindrome_i32`
[INFO] [stdout]   --> src/leetcode/q9_palindrome_number.rs:28:12
[INFO] [stdout]    |
[INFO] [stdout] 28 |     pub fn is_palindrome_i32(x: i32) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: comparison is useless due to type limits
[INFO] [stdout]   --> src/leetcode/q5_longest_palindromic_substring.rs:89:15
[INFO] [stdout]    |
[INFO] [stdout] 89 |         while i >= 0 && j < len {
[INFO] [stdout]    |               ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_comparisons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.07s
[INFO] [stdout] warning: 34 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "a9fda02b93d35de201a74506ba9b28cc721048f808dafe28b4df709ee05a51fa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a9fda02b93d35de201a74506ba9b28cc721048f808dafe28b4df709ee05a51fa", kill_on_drop: false }`
[INFO] [stdout] a9fda02b93d35de201a74506ba9b28cc721048f808dafe28b4df709ee05a51fa