[INFO] updating cached repository https://github.com/evgeni-nabokov/leetcode-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/evgeni-nabokov/leetcode-rust
[INFO] [stderr]    6361ba0..3dd56a4  master     -> master
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 3dd56a4cb58a481d6f2fbdbf8110a9180d4d8043
[INFO] checking evgeni-nabokov/leetcode-rust against master#914adf04af1c1a984707f778da3d04590c03d144 for pr-72331
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fevgeni-nabokov%2Fleetcode-rust" "/workspace/builds/worker-12/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/evgeni-nabokov/leetcode-rust on toolchain 914adf04af1c1a984707f778da3d04590c03d144
[INFO] running `"/workspace/cargo-home/bin/cargo" "+914adf04af1c1a984707f778da3d04590c03d144" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/evgeni-nabokov/leetcode-rust
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[INFO] crate git repo https://github.com/evgeni-nabokov/leetcode-rust already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+914adf04af1c1a984707f778da3d04590c03d144" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "+914adf04af1c1a984707f778da3d04590c03d144" "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] 6770cb923fb138f41dc941083785f88fb9d7798e87e75e3ae0c10b0bb9ffb12d
[INFO] running `"docker" "start" "-a" "6770cb923fb138f41dc941083785f88fb9d7798e87e75e3ae0c10b0bb9ffb12d"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]     Checking leetcode v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `crate::challenge_2020_04::tree_node::TreeNode`
[INFO] [stderr]   --> src/challenge_2020_04/mod.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 | use crate::challenge_2020_04::tree_node::TreeNode;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: type `StockSpanner_v2` should have an upper camel case name
[INFO] [stderr]   --> src/challenge_2020_05/stock_spanner.rs:25:12
[INFO] [stderr]    |
[INFO] [stderr] 25 | pub struct StockSpanner_v2 {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^ help: convert the identifier to upper camel case: `StockSpannerV2`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `BinaryTree`
[INFO] [stderr]   --> src/challenge_2020_05/mod.rs:12:42
[INFO] [stderr]    |
[INFO] [stderr] 12 | use crate::common::tree_node::{TreeNode, BinaryTree};
[INFO] [stderr]    |                                          ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::ops::Deref`
[INFO] [stderr]   --> src/challenge_2020_05/mod.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 | use std::ops::Deref;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `HashMap`
[INFO] [stderr]  --> src/contest_187/mod.rs:1:33
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::collections::{HashSet, HashMap};
[INFO] [stderr]   |                                 ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `max`, `min`
[INFO] [stderr]  --> src/contest_187/mod.rs:2:16
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::cmp::{min, max};
[INFO] [stderr]   |                ^^^  ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `super::*`
[INFO] [stderr]  --> src/common/tree_node_tests.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use super::*;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::challenge_2020_04::tree_node::TreeNode`
[INFO] [stderr]   --> src/challenge_2020_04/mod.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 | use crate::challenge_2020_04::tree_node::TreeNode;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type `StockSpanner_v2` should have an upper camel case name
[INFO] [stderr]   --> src/challenge_2020_05/stock_spanner.rs:25:12
[INFO] [stderr]    |
[INFO] [stderr] 25 | pub struct StockSpanner_v2 {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^ help: convert the identifier to upper camel case: `StockSpannerV2`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `BinaryTree`
[INFO] [stderr]   --> src/challenge_2020_05/mod.rs:12:42
[INFO] [stderr]    |
[INFO] [stderr] 12 | use crate::common::tree_node::{TreeNode, BinaryTree};
[INFO] [stderr]    |                                          ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::ops::Deref`
[INFO] [stderr]   --> src/challenge_2020_05/mod.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 | use std::ops::Deref;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `HashMap`
[INFO] [stderr]  --> src/contest_187/mod.rs:1:33
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::collections::{HashSet, HashMap};
[INFO] [stderr]   |                                 ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `max`, `min`
[INFO] [stderr]  --> src/contest_187/mod.rs:2:16
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::cmp::{min, max};
[INFO] [stderr]   |                ^^^  ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]    --> src/challenge_2020_05/mod.rs:422:9
[INFO] [stderr]     |
[INFO] [stderr] 410 | /         loop {
[INFO] [stderr] 411 | |             while node.is_some() {
[INFO] [stderr] 412 | |                 stack.push(node.clone());
[INFO] [stderr] 413 | |                 node = RefCell::borrow(node.clone().as_ref().unwrap()).left.clone()
[INFO] [stderr] ...   |
[INFO] [stderr] 420 | |             node = RefCell::borrow(node.clone().as_ref().unwrap()).right.clone()
[INFO] [stderr] 421 | |         }
[INFO] [stderr]     | |_________- any code following this expression is unreachable
[INFO] [stderr] 422 |           1
[INFO] [stderr]     |           ^ unreachable expression
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::borrow::BorrowMut`
[INFO] [stderr]  --> src/common/tree_node.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::borrow::BorrowMut;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `k`
[INFO] [stderr]   --> src/challenge_2020_05/stock_spanner.rs:18:72
[INFO] [stderr]    |
[INFO] [stderr] 18 |         let nearest_greater_day = *self.map.range((price + 1)..).map(|(k, v)| v).max().unwrap_or(&0);// next().unwrap_or((&0, &0));
[INFO] [stderr]    |                                                                        ^ help: if this is intentional, prefix it with an underscore: `_k`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]   --> src/contest_184/mod.rs:92:12
[INFO] [stderr]    |
[INFO] [stderr] 92 |        for i in 2..=n {
[INFO] [stderr]    |            ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/challenge_2020_05/mod.rs:262:13
[INFO] [stderr]     |
[INFO] [stderr] 262 |         let mut digits: Vec<char> = num.chars().collect();
[INFO] [stderr]     |             ----^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/challenge_2020_05/mod.rs:435:25
[INFO] [stderr]     |
[INFO] [stderr] 435 |                     let mut max_size = min(n_rows - r, n_cols - c);
[INFO] [stderr]     |                         ----^^^^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/challenge_2020_05/stock_spanner.rs:19:13
[INFO] [stderr]    |
[INFO] [stderr] 19 |         let mut span = self.day - nearest_greater_day;
[INFO] [stderr]    |             ----^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `create_from_level_order`
[INFO] [stderr]   --> src/common/tree_node.rs:14:12
[INFO] [stderr]    |
[INFO] [stderr] 14 |     pub fn create_from_level_order(values: &[Option<i32>]) -> Option<Rc<RefCell<TreeNode>>> {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `insert_level_order`
[INFO] [stderr]   --> src/common/tree_node.rs:15:12
[INFO] [stderr]    |
[INFO] [stderr] 15 |         fn insert_level_order(values: &[Option<i32>], i: usize) -> Option<Rc<RefCell<TreeNode>>> {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new_with_children`
[INFO] [stderr]   --> src/common/tree_node.rs:42:12
[INFO] [stderr]    |
[INFO] [stderr] 42 |     pub fn new_with_children(val: i32, left: Option<Rc<RefCell<TreeNode>>>, right: Option<Rc<RefCell<TreeNode>>>)
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/challenge_2020_04/list_node.rs:10:12
[INFO] [stderr]    |
[INFO] [stderr] 10 |     pub fn new(val: i32) -> Self {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/challenge_2020_04/tree_node.rs:14:12
[INFO] [stderr]    |
[INFO] [stderr] 14 |     pub fn new(val: i32) -> Self {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `MinStack`
[INFO] [stderr]  --> src/challenge_2020_04/min_stack.rs:3:12
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub struct MinStack {
[INFO] [stderr]   |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]  --> src/challenge_2020_04/min_stack.rs:8:12
[INFO] [stderr]   |
[INFO] [stderr] 8 |     pub fn new() -> Self {
[INFO] [stderr]   |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `push`
[INFO] [stderr]   --> src/challenge_2020_04/min_stack.rs:12:12
[INFO] [stderr]    |
[INFO] [stderr] 12 |     pub fn push(&mut self, x: i32) {
[INFO] [stderr]    |            ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `pop`
[INFO] [stderr]   --> src/challenge_2020_04/min_stack.rs:16:12
[INFO] [stderr]    |
[INFO] [stderr] 16 |     pub fn pop(&mut self) {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `top`
[INFO] [stderr]   --> src/challenge_2020_04/min_stack.rs:20:12
[INFO] [stderr]    |
[INFO] [stderr] 20 |     pub fn top(&mut self) -> Option<i32> {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get_min`
[INFO] [stderr]   --> src/challenge_2020_04/min_stack.rs:28:12
[INFO] [stderr]    |
[INFO] [stderr] 28 |     pub fn get_min(&self) -> Option<i32> {
[INFO] [stderr]    |            ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `apply_backspaces`
[INFO] [stderr]   --> src/challenge_2020_04/mod.rs:16:8
[INFO] [stderr]    |
[INFO] [stderr] 16 | pub fn apply_backspaces(iter: &mut Rev<Chars>) -> Option<char> {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]   --> src/challenge_2020_04/mod.rs:29:8
[INFO] [stderr]    |
[INFO] [stderr] 29 | struct Solution;
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `single_number`
[INFO] [stderr]   --> src/challenge_2020_04/mod.rs:33:12
[INFO] [stderr]    |
[INFO] [stderr] 33 |     pub fn single_number(mut nums: Vec<i32>) -> i32 {
[INFO] [stderr]    |            ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `single_number_v2`
[INFO] [stderr]   --> src/challenge_2020_04/mod.rs:53:12
[INFO] [stderr]    |
[INFO] [stderr] 53 |     pub fn single_number_v2(nums: Vec<i32>) -> i32 {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `is_happy`
[INFO] [stderr]   --> src/challenge_2020_04/mod.rs:62:12
[INFO] [stderr]    |
[INFO] [stderr] 62 |     pub fn is_happy(n: i32) -> bool {
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `max_sub_array`
[INFO] [stderr]   --> src/challenge_2020_04/mod.rs:88:12
[INFO] [stderr]    |
[INFO] [stderr] 88 |     pub fn max_sub_array(nums: Vec<i32>) -> i32 {
[INFO] [stderr]    |            ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `max_sub_array_v2`
[INFO] [stderr]    --> src/challenge_2020_04/mod.rs:112:12
[INFO] [stderr]     |
[INFO] [stderr] 112 |     pub fn max_sub_array_v2(nums: Vec<i32>) -> i32 {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `move_zeroes`
[INFO] [stderr]    --> src/challenge_2020_04/mod.rs:124:12
[INFO] [stderr]     |
[INFO] [stderr] 124 |     pub fn move_zeroes(nums: &mut Vec<i32>) {
[INFO] [stderr]     |            ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `move_zeroes_v2`
[INFO] [stderr]    --> src/challenge_2020_04/mod.rs:142:12
[INFO] [stderr]     |
[INFO] [stderr] 142 |     pub fn move_zeroes_v2(nums: &mut Vec<i32>) {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `max_profit`
[INFO] [stderr]    --> src/challenge_2020_04/mod.rs:159:12
[INFO] [stderr]     |
[INFO] [stderr] 159 |     pub fn max_profit(prices: Vec<i32>) -> i32 {
[INFO] [stderr]     |            ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `max_profit_v2`
[INFO] [stderr]    --> src/challenge_2020_04/mod.rs:196:12
[INFO] [stderr]     |
[INFO] [stderr] 196 |     pub fn max_profit_v2(prices: Vec<i32>) -> i32 {
[INFO] [stderr]     |            ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `group_anagrams`
[INFO] [stderr]    --> src/challenge_2020_04/mod.rs:211:12
[INFO] [stderr]     |
[INFO] [stderr] 211 |     pub fn group_anagrams(strs: Vec<String>) -> Vec<Vec<String>> {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `group_anagrams_v2`
[INFO] [stderr]    --> src/challenge_2020_04/mod.rs:230:12
[INFO] [stderr]     |
[INFO] [stderr] 230 |     pub fn group_anagrams_v2(strs: Vec<String>) -> Vec<Vec<String>> {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `count_elements`
[INFO] [stderr]    --> src/challenge_2020_04/mod.rs:247:12
[INFO] [stderr]     |
[INFO] [stderr] 247 |     pub fn count_elements(mut arr: Vec<i32>) -> i32 {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `middle_node`
[INFO] [stderr]    --> src/challenge_2020_04/mod.rs:267:12
[INFO] [stderr]     |
[INFO] [stderr] 267 |     pub fn middle_node(head: Option<Box<ListNode>>) -> Option<Box<ListNode>> {
[INFO] [stderr]     |            ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `backspace_compare`
[INFO] [stderr]    --> src/challenge_2020_04/mod.rs:284:12
[INFO] [stderr]     |
[INFO] [stderr] 284 |     pub fn backspace_compare(s: String, t: String) -> bool {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `last_stone_weight`
[INFO] [stderr]    --> src/challenge_2020_04/mod.rs:297:12
[INFO] [stderr]     |
[INFO] [stderr] 297 |     pub fn last_stone_weight(stones: Vec<i32>) -> i32 {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `find_max_length`
[INFO] [stderr]    --> src/challenge_2020_04/mod.rs:315:12
[INFO] [stderr]     |
[INFO] [stderr] 315 |     pub fn find_max_length(nums: Vec<i32>) -> i32 {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `find_max_length_v2`
[INFO] [stderr]    --> src/challenge_2020_04/mod.rs:332:12
[INFO] [stderr]     |
[INFO] [stderr] 332 |     pub fn find_max_length_v2(nums: Vec<i32>) -> i32 {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `string_shift`
[INFO] [stderr]    --> src/challenge_2020_04/mod.rs:352:12
[INFO] [stderr]     |
[INFO] [stderr] 352 |     pub fn string_shift(s: String, shift: Vec<Vec<i32>>) -> String {
[INFO] [stderr]     |            ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `product_except_self`
[INFO] [stderr]    --> src/challenge_2020_04/mod.rs:369:12
[INFO] [stderr]     |
[INFO] [stderr] 369 |     pub fn product_except_self(nums: Vec<i32>) -> Vec<i32> {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `product_except_self_v2`
[INFO] [stderr]    --> src/challenge_2020_04/mod.rs:384:12
[INFO] [stderr]     |
[INFO] [stderr] 384 |     pub fn product_except_self_v2(nums: Vec<i32>) -> Vec<i32> {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `check_valid_string`
[INFO] [stderr]    --> src/challenge_2020_04/mod.rs:400:12
[INFO] [stderr]     |
[INFO] [stderr] 400 |     pub fn check_valid_string(s: String) -> bool {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `num_islands`
[INFO] [stderr]    --> src/challenge_2020_04/mod.rs:425:12
[INFO] [stderr]     |
[INFO] [stderr] 425 |     pub fn num_islands(grid: Vec<Vec<char>>) -> i32 {
[INFO] [stderr]     |            ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `visit_cell`
[INFO] [stderr]    --> src/challenge_2020_04/mod.rs:431:12
[INFO] [stderr]     |
[INFO] [stderr] 431 |         fn visit_cell((x, y): (i32, i32), &(w, h): &(i32, i32), grid: &Vec<Vec<char>>, mut visited_cells: HashSet<i32>) -> HashSet<i32> {
[INFO] [stderr]     |            ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `num_islands_v2`
[INFO] [stderr]    --> src/challenge_2020_04/mod.rs:465:12
[INFO] [stderr]     |
[INFO] [stderr] 465 |     pub fn num_islands_v2(mut grid: Vec<Vec<char>>) -> i32 {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `visit_cell`
[INFO] [stderr]    --> src/challenge_2020_04/mod.rs:470:12
[INFO] [stderr]     |
[INFO] [stderr] 470 |         fn visit_cell((x, y): (i32, i32), &(w, h): &(i32, i32), grid: &mut Vec<Vec<char>>) {
[INFO] [stderr]     |            ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `min_path_sum`
[INFO] [stderr]    --> src/challenge_2020_04/mod.rs:492:12
[INFO] [stderr]     |
[INFO] [stderr] 492 |     pub fn min_path_sum(grid: Vec<Vec<i32>>) -> i32 {
[INFO] [stderr]     |            ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `search`
[INFO] [stderr]    --> src/challenge_2020_04/mod.rs:511:12
[INFO] [stderr]     |
[INFO] [stderr] 511 |     pub fn search(nums: Vec<i32>, target: i32) -> i32 {
[INFO] [stderr]     |            ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `subarray_sum`
[INFO] [stderr]    --> src/challenge_2020_04/mod.rs:541:12
[INFO] [stderr]     |
[INFO] [stderr] 541 |     pub fn subarray_sum(nums: Vec<i32>, k: i32) -> i32 {
[INFO] [stderr]     |            ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `subarray_sum_v2`
[INFO] [stderr]    --> src/challenge_2020_04/mod.rs:560:12
[INFO] [stderr]     |
[INFO] [stderr] 560 |     pub fn subarray_sum_v2(nums: Vec<i32>, k: i32) -> i32 {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `subarray_sum_v3`
[INFO] [stderr]    --> src/challenge_2020_04/mod.rs:579:12
[INFO] [stderr]     |
[INFO] [stderr] 579 |     pub fn subarray_sum_v3(nums: Vec<i32>, k: i32) -> i32 {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `subarray_sum_v4`
[INFO] [stderr]    --> src/challenge_2020_04/mod.rs:594:12
[INFO] [stderr]     |
[INFO] [stderr] 594 |     pub fn subarray_sum_v4(nums: Vec<i32>, k: i32) -> i32 {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `range_bitwise_and`
[INFO] [stderr]    --> src/challenge_2020_04/mod.rs:609:12
[INFO] [stderr]     |
[INFO] [stderr] 609 |     pub fn range_bitwise_and(mut m: i32, mut n: i32) -> i32 {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `can_jump`
[INFO] [stderr]    --> src/challenge_2020_04/mod.rs:619:12
[INFO] [stderr]     |
[INFO] [stderr] 619 |     pub fn can_jump(nums: Vec<i32>) -> bool {
[INFO] [stderr]     |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `can_jump_recursive`
[INFO] [stderr]    --> src/challenge_2020_04/mod.rs:624:8
[INFO] [stderr]     |
[INFO] [stderr] 624 |     fn can_jump_recursive(nums: &[i32]) -> bool {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `can_jump_v2`
[INFO] [stderr]    --> src/challenge_2020_04/mod.rs:637:12
[INFO] [stderr]     |
[INFO] [stderr] 637 |     pub fn can_jump_v2(nums: Vec<i32>) -> bool {
[INFO] [stderr]     |            ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `longest_common_subsequence`
[INFO] [stderr]    --> src/challenge_2020_04/mod.rs:650:12
[INFO] [stderr]     |
[INFO] [stderr] 650 |     pub fn longest_common_subsequence(text_1: String, text_2: String) -> i32 {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `maximal_square`
[INFO] [stderr]    --> src/challenge_2020_04/mod.rs:669:12
[INFO] [stderr]     |
[INFO] [stderr] 669 |     pub fn maximal_square(matrix: Vec<Vec<char>>) -> i32 {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `maximal_square_v2`
[INFO] [stderr]    --> src/challenge_2020_04/mod.rs:688:12
[INFO] [stderr]     |
[INFO] [stderr] 688 |     pub fn maximal_square_v2(matrix: Vec<Vec<char>>) -> i32 {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/challenge_2020_05/trie.rs:11:12
[INFO] [stderr]    |
[INFO] [stderr] 11 |     pub fn new() -> Self {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `insert`
[INFO] [stderr]   --> src/challenge_2020_05/trie.rs:18:12
[INFO] [stderr]    |
[INFO] [stderr] 18 |     pub fn insert(&mut self, word: String) {
[INFO] [stderr]    |            ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `search`
[INFO] [stderr]   --> src/challenge_2020_05/trie.rs:23:12
[INFO] [stderr]    |
[INFO] [stderr] 23 |     pub fn search(&self, word: String) -> bool {
[INFO] [stderr]    |            ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `starts_with`
[INFO] [stderr]   --> src/challenge_2020_05/trie.rs:28:12
[INFO] [stderr]    |
[INFO] [stderr] 28 |     pub fn starts_with(&self, prefix: String) -> bool {
[INFO] [stderr]    |            ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `insert`
[INFO] [stderr]   --> src/challenge_2020_05/trie_node.rs:10:12
[INFO] [stderr]    |
[INFO] [stderr] 10 |     pub fn insert(&mut self, word: &[char]) {
[INFO] [stderr]    |            ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `contains`
[INFO] [stderr]   --> src/challenge_2020_05/trie_node.rs:22:12
[INFO] [stderr]    |
[INFO] [stderr] 22 |     pub fn contains(&self, word: &[char]) -> bool {
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `starts_with`
[INFO] [stderr]   --> src/challenge_2020_05/trie_node.rs:33:12
[INFO] [stderr]    |
[INFO] [stderr] 33 |     pub fn starts_with(&self, word: &[char]) -> bool {
[INFO] [stderr]    |            ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/challenge_2020_05/list_node.rs:10:12
[INFO] [stderr]    |
[INFO] [stderr] 10 |     pub fn new(val: i32) -> Self {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `to_vec`
[INFO] [stderr]   --> src/challenge_2020_05/list_node.rs:17:12
[INFO] [stderr]    |
[INFO] [stderr] 17 |     pub fn to_vec(&self) -> Vec<i32> {
[INFO] [stderr]    |            ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `from_slice`
[INFO] [stderr]   --> src/challenge_2020_05/list_node.rs:29:12
[INFO] [stderr]    |
[INFO] [stderr] 29 |     pub fn from_slice(values: &[i32]) -> Option<Box<ListNode>> {
[INFO] [stderr]    |            ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `StockSpanner`
[INFO] [stderr]  --> src/challenge_2020_05/stock_spanner.rs:3:12
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub struct StockSpanner {
[INFO] [stderr]   |            ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]  --> src/challenge_2020_05/stock_spanner.rs:9:12
[INFO] [stderr]   |
[INFO] [stderr] 9 |     pub fn new() -> Self {
[INFO] [stderr]   |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `next`
[INFO] [stderr]   --> src/challenge_2020_05/stock_spanner.rs:16:12
[INFO] [stderr]    |
[INFO] [stderr] 16 |     pub fn next(&mut self, price: i32) -> i32 {
[INFO] [stderr]    |            ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `StockSpanner_v2`
[INFO] [stderr]   --> src/challenge_2020_05/stock_spanner.rs:25:12
[INFO] [stderr]    |
[INFO] [stderr] 25 | pub struct StockSpanner_v2 {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/challenge_2020_05/stock_spanner.rs:30:12
[INFO] [stderr]    |
[INFO] [stderr] 30 |     pub fn new() -> Self {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `next`
[INFO] [stderr]   --> src/challenge_2020_05/stock_spanner.rs:36:12
[INFO] [stderr]    |
[INFO] [stderr] 36 |     pub fn next(&mut self, price: i32) -> i32 {
[INFO] [stderr]    |            ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]   --> src/challenge_2020_05/mod.rs:19:12
[INFO] [stderr]    |
[INFO] [stderr] 19 | pub struct Solution;
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `num_jewels_in_stones`
[INFO] [stderr]   --> src/challenge_2020_05/mod.rs:22:12
[INFO] [stderr]    |
[INFO] [stderr] 22 |     pub fn num_jewels_in_stones(jewels: String, stones: String) -> i32 {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `can_construct`
[INFO] [stderr]   --> src/challenge_2020_05/mod.rs:37:12
[INFO] [stderr]    |
[INFO] [stderr] 37 |     pub fn can_construct(ransom_note: String, magazine: String) -> bool {
[INFO] [stderr]    |            ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `can_construct_v2`
[INFO] [stderr]   --> src/challenge_2020_05/mod.rs:57:12
[INFO] [stderr]    |
[INFO] [stderr] 57 |     pub fn can_construct_v2(ransom_note: String, magazine: String) -> bool {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `bitwise_complement`
[INFO] [stderr]   --> src/challenge_2020_05/mod.rs:74:12
[INFO] [stderr]    |
[INFO] [stderr] 74 |     pub fn bitwise_complement(n: i32) -> i32 {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `bitwise_complement_v2`
[INFO] [stderr]   --> src/challenge_2020_05/mod.rs:92:12
[INFO] [stderr]    |
[INFO] [stderr] 92 |     pub fn bitwise_complement_v2(n: i32) -> i32 {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `first_uniq_char`
[INFO] [stderr]   --> src/challenge_2020_05/mod.rs:96:12
[INFO] [stderr]    |
[INFO] [stderr] 96 |     pub fn first_uniq_char(s: String) -> i32 {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `majority_element`
[INFO] [stderr]    --> src/challenge_2020_05/mod.rs:110:12
[INFO] [stderr]     |
[INFO] [stderr] 110 |     pub fn majority_element(nums: Vec<i32>) -> i32 {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `check_straight_line`
[INFO] [stderr]    --> src/challenge_2020_05/mod.rs:128:12
[INFO] [stderr]     |
[INFO] [stderr] 128 |     pub fn check_straight_line(coordinates: Vec<Vec<i32>>) -> bool {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `is_perfect_square`
[INFO] [stderr]    --> src/challenge_2020_05/mod.rs:148:12
[INFO] [stderr]     |
[INFO] [stderr] 148 |     pub fn is_perfect_square(num: i32) -> bool {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `is_perfect_square_v2`
[INFO] [stderr]    --> src/challenge_2020_05/mod.rs:163:12
[INFO] [stderr]     |
[INFO] [stderr] 163 |     pub fn is_perfect_square_v2(num: i32) -> bool {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `find_judge`
[INFO] [stderr]    --> src/challenge_2020_05/mod.rs:182:12
[INFO] [stderr]     |
[INFO] [stderr] 182 |     pub fn find_judge(n: i32, trust: Vec<Vec<i32>>) -> i32 {
[INFO] [stderr]     |            ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `find_judge_v2`
[INFO] [stderr]    --> src/challenge_2020_05/mod.rs:204:12
[INFO] [stderr]     |
[INFO] [stderr] 204 |     pub fn find_judge_v2(n: i32, trust: Vec<Vec<i32>>) -> i32 {
[INFO] [stderr]     |            ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `flood_fill`
[INFO] [stderr]    --> src/challenge_2020_05/mod.rs:216:12
[INFO] [stderr]     |
[INFO] [stderr] 216 |     pub fn flood_fill(mut image: Vec<Vec<i32>>, sr: i32, sc: i32, new_color: i32) -> Vec<Vec<i32>> {
[INFO] [stderr]     |            ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fill`
[INFO] [stderr]    --> src/challenge_2020_05/mod.rs:217:12
[INFO] [stderr]     |
[INFO] [stderr] 217 |         fn fill(image: &mut Vec<Vec<i32>>, r: usize, c: usize, new_color: i32, old_color: i32) {
[INFO] [stderr]     |            ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `single_non_duplicate`
[INFO] [stderr]    --> src/challenge_2020_05/mod.rs:240:12
[INFO] [stderr]     |
[INFO] [stderr] 240 |     pub fn single_non_duplicate(nums: Vec<i32>) -> i32 {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `remove_k_digits`
[INFO] [stderr]    --> src/challenge_2020_05/mod.rs:259:12
[INFO] [stderr]     |
[INFO] [stderr] 259 |     pub fn remove_k_digits(num: String, mut k: i32) -> String {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `max_subarray_sum_circular`
[INFO] [stderr]    --> src/challenge_2020_05/mod.rs:282:12
[INFO] [stderr]     |
[INFO] [stderr] 282 |     pub fn max_subarray_sum_circular(nums: Vec<i32>) -> i32 {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `odd_even_list`
[INFO] [stderr]    --> src/challenge_2020_05/mod.rs:303:12
[INFO] [stderr]     |
[INFO] [stderr] 303 |     pub fn odd_even_list(head: Option<Box<ListNode>>) -> Option<Box<ListNode>> {
[INFO] [stderr]     |            ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `find_anagrams`
[INFO] [stderr]    --> src/challenge_2020_05/mod.rs:330:12
[INFO] [stderr]     |
[INFO] [stderr] 330 |     pub fn find_anagrams(s: String, p: String) -> Vec<i32> {
[INFO] [stderr]     |            ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `find_anagrams_v2`
[INFO] [stderr]    --> src/challenge_2020_05/mod.rs:355:12
[INFO] [stderr]     |
[INFO] [stderr] 355 |     pub fn find_anagrams_v2(s: String, p: String) -> Vec<i32> {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant is never used: `BASE`
[INFO] [stderr]    --> src/challenge_2020_05/mod.rs:357:9
[INFO] [stderr]     |
[INFO] [stderr] 357 |         const BASE: usize = 'a' as usize;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `check_inclusion`
[INFO] [stderr]    --> src/challenge_2020_05/mod.rs:381:12
[INFO] [stderr]     |
[INFO] [stderr] 381 |     pub fn check_inclusion(s1: String, s2: String) -> bool {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant is never used: `BASE`
[INFO] [stderr]    --> src/challenge_2020_05/mod.rs:383:9
[INFO] [stderr]     |
[INFO] [stderr] 383 |         const BASE: usize = 'a' as usize;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `kth_smallest`
[INFO] [stderr]    --> src/challenge_2020_05/mod.rs:406:12
[INFO] [stderr]     |
[INFO] [stderr] 406 |     pub fn kth_smallest(root: Option<Rc<RefCell<TreeNode>>>, k: i32) -> i32 {
[INFO] [stderr]     |            ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `count_squares`
[INFO] [stderr]    --> src/challenge_2020_05/mod.rs:425:12
[INFO] [stderr]     |
[INFO] [stderr] 425 |     pub fn count_squares(matrix: Vec<Vec<i32>>) -> i32 {
[INFO] [stderr]     |            ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/contest_184/mod.rs:6:8
[INFO] [stderr]   |
[INFO] [stderr] 6 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `string_matching`
[INFO] [stderr]   --> src/contest_184/mod.rs:10:12
[INFO] [stderr]    |
[INFO] [stderr] 10 |     pub fn string_matching(mut words: Vec<String>) -> Vec<String> {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `entity_parser`
[INFO] [stderr]   --> src/contest_184/mod.rs:30:12
[INFO] [stderr]    |
[INFO] [stderr] 30 |     pub fn entity_parser(text: String) -> String {
[INFO] [stderr]    |            ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `process_queries`
[INFO] [stderr]   --> src/contest_184/mod.rs:65:12
[INFO] [stderr]    |
[INFO] [stderr] 65 |     pub fn process_queries(queries: Vec<i32>, m: i32) -> Vec<i32> {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `num_of_ways`
[INFO] [stderr]   --> src/contest_184/mod.rs:86:12
[INFO] [stderr]    |
[INFO] [stderr] 86 |     pub fn num_of_ways(n: i32) -> i32 {
[INFO] [stderr]    |            ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/contest_185/mod.rs:7:8
[INFO] [stderr]   |
[INFO] [stderr] 7 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `reformat`
[INFO] [stderr]   --> src/contest_185/mod.rs:10:12
[INFO] [stderr]    |
[INFO] [stderr] 10 |     pub fn reformat(s: String) -> String {
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `display_table`
[INFO] [stderr]   --> src/contest_185/mod.rs:40:12
[INFO] [stderr]    |
[INFO] [stderr] 40 |     pub fn display_table(orders: Vec<Vec<String>>) -> Vec<Vec<String>> {
[INFO] [stderr]    |            ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `display_table_v2`
[INFO] [stderr]   --> src/contest_185/mod.rs:78:12
[INFO] [stderr]    |
[INFO] [stderr] 78 |     pub fn display_table_v2(orders: Vec<Vec<String>>) -> Vec<Vec<String>> {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/contest_186/mod.rs:6:8
[INFO] [stderr]   |
[INFO] [stderr] 6 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `max_score`
[INFO] [stderr]  --> src/contest_186/mod.rs:9:12
[INFO] [stderr]   |
[INFO] [stderr] 9 |     pub fn max_score(s: String) -> i32 {
[INFO] [stderr]   |            ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `find_diagonal_order`
[INFO] [stderr]   --> src/contest_186/mod.rs:34:12
[INFO] [stderr]    |
[INFO] [stderr] 34 |     pub fn find_diagonal_order(nums: Vec<Vec<i32>>) -> Vec<i32> {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/contest_187/mod.rs:7:8
[INFO] [stderr]   |
[INFO] [stderr] 7 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `dest_city`
[INFO] [stderr]   --> src/contest_187/mod.rs:10:12
[INFO] [stderr]    |
[INFO] [stderr] 10 |     pub fn dest_city(paths: Vec<Vec<String>>) -> String {
[INFO] [stderr]    |            ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `k_length_apart`
[INFO] [stderr]   --> src/contest_187/mod.rs:23:12
[INFO] [stderr]    |
[INFO] [stderr] 23 |     pub fn k_length_apart(nums: Vec<i32>, k: i32) -> bool {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/contest_188/mod.rs:4:8
[INFO] [stderr]   |
[INFO] [stderr] 4 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `build_array`
[INFO] [stderr]  --> src/contest_188/mod.rs:7:12
[INFO] [stderr]   |
[INFO] [stderr] 7 |     pub fn build_array(target: Vec<i32>, n: i32) -> Vec<String> {
[INFO] [stderr]   |            ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/easy/mod.rs:6:8
[INFO] [stderr]   |
[INFO] [stderr] 6 | struct Solution {}
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `two_sum`
[INFO] [stderr]   --> src/easy/mod.rs:10:12
[INFO] [stderr]    |
[INFO] [stderr] 10 |     pub fn two_sum(nums: Vec<i32>, target: i32) -> Vec<i32> {
[INFO] [stderr]    |            ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/medium/mod.rs:4:8
[INFO] [stderr]   |
[INFO] [stderr] 4 | struct Solution {}
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `three_sum`
[INFO] [stderr]  --> src/medium/mod.rs:8:12
[INFO] [stderr]   |
[INFO] [stderr] 8 |     pub fn three_sum(mut nums: Vec<i32>) -> Vec<Vec<i32>> {
[INFO] [stderr]   |            ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 127 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]    --> src/challenge_2020_05/mod.rs:422:9
[INFO] [stderr]     |
[INFO] [stderr] 410 | /         loop {
[INFO] [stderr] 411 | |             while node.is_some() {
[INFO] [stderr] 412 | |                 stack.push(node.clone());
[INFO] [stderr] 413 | |                 node = RefCell::borrow(node.clone().as_ref().unwrap()).left.clone()
[INFO] [stderr] ...   |
[INFO] [stderr] 420 | |             node = RefCell::borrow(node.clone().as_ref().unwrap()).right.clone()
[INFO] [stderr] 421 | |         }
[INFO] [stderr]     | |_________- any code following this expression is unreachable
[INFO] [stderr] 422 |           1
[INFO] [stderr]     |           ^ unreachable expression
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::borrow::BorrowMut`
[INFO] [stderr]  --> src/common/tree_node.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::borrow::BorrowMut;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `k`
[INFO] [stderr]   --> src/challenge_2020_05/stock_spanner.rs:18:72
[INFO] [stderr]    |
[INFO] [stderr] 18 |         let nearest_greater_day = *self.map.range((price + 1)..).map(|(k, v)| v).max().unwrap_or(&0);// next().unwrap_or((&0, &0));
[INFO] [stderr]    |                                                                        ^ help: if this is intentional, prefix it with an underscore: `_k`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]   --> src/contest_184/mod.rs:92:12
[INFO] [stderr]    |
[INFO] [stderr] 92 |        for i in 2..=n {
[INFO] [stderr]    |            ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/challenge_2020_05/mod.rs:262:13
[INFO] [stderr]     |
[INFO] [stderr] 262 |         let mut digits: Vec<char> = num.chars().collect();
[INFO] [stderr]     |             ----^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/challenge_2020_05/mod.rs:435:25
[INFO] [stderr]     |
[INFO] [stderr] 435 |                     let mut max_size = min(n_rows - r, n_cols - c);
[INFO] [stderr]     |                         ----^^^^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/challenge_2020_05/stock_spanner.rs:19:13
[INFO] [stderr]    |
[INFO] [stderr] 19 |         let mut span = self.day - nearest_greater_day;
[INFO] [stderr]    |             ----^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/challenge_2020_04/tree_node.rs:14:12
[INFO] [stderr]    |
[INFO] [stderr] 14 |     pub fn new(val: i32) -> Self {
[INFO] [stderr]    |            ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `check_inclusion`
[INFO] [stderr]    --> src/challenge_2020_05/mod.rs:381:12
[INFO] [stderr]     |
[INFO] [stderr] 381 |     pub fn check_inclusion(s1: String, s2: String) -> bool {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant is never used: `BASE`
[INFO] [stderr]    --> src/challenge_2020_05/mod.rs:383:9
[INFO] [stderr]     |
[INFO] [stderr] 383 |         const BASE: usize = 'a' as usize;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `find_diagonal_order`
[INFO] [stderr]   --> src/contest_186/mod.rs:34:12
[INFO] [stderr]    |
[INFO] [stderr] 34 |     pub fn find_diagonal_order(nums: Vec<Vec<i32>>) -> Vec<i32> {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 18 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.19s
[INFO] running `"docker" "inspect" "6770cb923fb138f41dc941083785f88fb9d7798e87e75e3ae0c10b0bb9ffb12d"`
[INFO] running `"docker" "rm" "-f" "6770cb923fb138f41dc941083785f88fb9d7798e87e75e3ae0c10b0bb9ffb12d"`
[INFO] [stdout] 6770cb923fb138f41dc941083785f88fb9d7798e87e75e3ae0c10b0bb9ffb12d