[INFO] cloning repository https://github.com/calamarte/leetcode
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/calamarte/leetcode" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcalamarte%2Fleetcode", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcalamarte%2Fleetcode'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ea98a0980d1332b1c73069a9b093a6ebd0889c30
[INFO] building calamarte/leetcode against master#11663cd3bfefef7d34e8f0892c250bf698049392+rustflags=-Dtail-expr-drop-order for pr-134523
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcalamarte%2Fleetcode" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/calamarte/leetcode on toolchain 11663cd3bfefef7d34e8f0892c250bf698049392
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/calamarte/leetcode
[INFO] finished tweaking git repo https://github.com/calamarte/leetcode
[INFO] tweaked toml for git repo https://github.com/calamarte/leetcode written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/calamarte/leetcode already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 744783c94933db651727766d89ffcf0530d691ec3a96926a01163da995f7137c
[INFO] running `Command { std: "docker" "start" "-a" "744783c94933db651727766d89ffcf0530d691ec3a96926a01163da995f7137c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "744783c94933db651727766d89ffcf0530d691ec3a96926a01163da995f7137c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "744783c94933db651727766d89ffcf0530d691ec3a96926a01163da995f7137c", kill_on_drop: false }`
[INFO] [stdout] 744783c94933db651727766d89ffcf0530d691ec3a96926a01163da995f7137c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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 -Dtail-expr-drop-order" "-e" "RUSTDOCFLAGS=--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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 199fdb42327583c7acfd04795aa7ba5349db556ae5ad2bd86b5943795d939637
[INFO] running `Command { std: "docker" "start" "-a" "199fdb42327583c7acfd04795aa7ba5349db556ae5ad2bd86b5943795d939637", kill_on_drop: false }`
[INFO] [stderr]    Compiling leetcode v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `BSTIteratorStack` is never constructed
[INFO] [stdout]   --> src/bt-iterator.rs:56:8
[INFO] [stdout]    |
[INFO] [stdout] 56 | struct BSTIteratorStack {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `next`, and `has_next` are never used
[INFO] [stdout]   --> src/bt-iterator.rs:61:8
[INFO] [stdout]    |
[INFO] [stdout] 60 | impl BSTIteratorStack {
[INFO] [stdout]    | --------------------- associated items in this implementation
[INFO] [stdout] 61 |     fn new(mut root: Option<Rc<RefCell<TreeNode>>>) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 72 |     fn next(&mut self) -> i32 {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 85 |     fn has_next(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `thread::current`
[INFO] [stdout]  --> src/candy.rs:1:16
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{i32, thread::current};
[INFO] [stdout]   |                ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `collections::HashMap`
[INFO] [stdout]  --> src/inorder-postorder-tree.rs:1:26
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{cell::RefCell, collections::HashMap, rc::Rc};
[INFO] [stdout]   |                          ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `nums`
[INFO] [stdout]  --> src/product-array.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 2 |     let nums = vec![1, 2, 3, 4];
[INFO] [stdout]   |         ^^^^ help: if this is intentional, prefix it with an underscore: `_nums`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ratings`
[INFO] [stdout]  --> src/candy.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let ratings = vec![1, 0, 2];
[INFO] [stdout]   |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_ratings`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ratings`
[INFO] [stdout]  --> src/candy.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let ratings = vec![1, 2, 2];
[INFO] [stdout]   |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_ratings`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/candy.rs:15:10
[INFO] [stdout]    |
[INFO] [stdout] 15 | fn candy(mut ratings: Vec<i32>) -> i32 {
[INFO] [stdout]    |          ----^^^^^^^
[INFO] [stdout]    |          |
[INFO] [stdout]    |          help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_anagram` is never used
[INFO] [stdout]  --> src/anagram.rs:9:4
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn is_anagram(s: String, t: String) -> bool {
[INFO] [stdout]   |    ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `collections::VecDeque`
[INFO] [stdout]  --> src/same-tree.rs:1:42
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{borrow::Borrow, cell::RefCell, collections::VecDeque, rc::Rc};
[INFO] [stdout]   |                                          ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `rotate` is never used
[INFO] [stdout]   --> src/rotate-image.rs:15:4
[INFO] [stdout]    |
[INFO] [stdout] 15 | fn rotate(matrix: &mut Vec<Vec<i32>>) {
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `borrow::Borrow`
[INFO] [stdout]  --> src/same-tree.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{borrow::Borrow, cell::RefCell, collections::VecDeque, rc::Rc};
[INFO] [stdout]   |           ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_same_tree_rust` is never used
[INFO] [stdout]   --> src/same-tree.rs:29:4
[INFO] [stdout]    |
[INFO] [stdout] 29 | fn is_same_tree_rust(p: Option<Rc<RefCell<TreeNode>>>, q: Option<Rc<RefCell<TreeNode>>>) -> bool {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `pop`, `top`, and `get_min` are never used
[INFO] [stdout]   --> src/min-stack.rs:42:8
[INFO] [stdout]    |
[INFO] [stdout] 25 | impl MinStack {
[INFO] [stdout]    | ------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 42 |     fn pop(&mut self) {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 46 |     fn top(&self) -> i32 {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 50 |     fn get_min(&self) -> i32 {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `days`
[INFO] [stdout]   --> src/best-buy-2.rs:11:13
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let mut days = prices.len();
[INFO] [stdout]    |             ^^^^ help: if this is intentional, prefix it with an underscore: `_days`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/best-buy-2.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let mut days = prices.len();
[INFO] [stdout]    |         ----^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `max_depth` is never used
[INFO] [stdout]   --> src/max-depth-bt.rs:13:4
[INFO] [stdout]    |
[INFO] [stdout] 13 | fn max_depth(root: Option<Rc<RefCell<TreeNode>>>) -> i32 {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `max_depth_rec` is never used
[INFO] [stdout]   --> src/max-depth-bt.rs:21:4
[INFO] [stdout]    |
[INFO] [stdout] 21 | fn max_depth_rec(root: Option<Rc<RefCell<TreeNode>>>, deep: usize) -> usize {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `max_depth_int_dfs` is never used
[INFO] [stdout]   --> src/max-depth-bt.rs:66:4
[INFO] [stdout]    |
[INFO] [stdout] 66 | fn max_depth_int_dfs(root: Option<Rc<RefCell<TreeNode>>>) -> i32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::usize`
[INFO] [stdout]  --> src/jump-game.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::usize;
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::iter::successors`
[INFO] [stdout]  --> src/remove-node-end.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::iter::successors;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `iter::once`
[INFO] [stdout]  --> src/jump-game-2.rs:1:21
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{cmp::max, iter::once, usize};
[INFO] [stdout]   |                     ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `LinkedList`, `borrow::BorrowMut`, `cell::RefCell`, and `rc::Rc`
[INFO] [stdout]  --> src/lru-cache.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 |     borrow::BorrowMut,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 3 |     cell::RefCell,
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 4 |     collections::{HashMap, LinkedList, VecDeque},
[INFO] [stdout]   |                            ^^^^^^^^^^
[INFO] [stdout] 5 |     rc::Rc,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `nums`
[INFO] [stdout]  --> src/jump-game-2.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let nums = vec![2, 3, 1, 1, 4];
[INFO] [stdout]   |         ^^^^ help: if this is intentional, prefix it with an underscore: `_nums`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `nums`
[INFO] [stdout]  --> src/jump-game-2.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let nums = vec![2, 3, 0, 1, 4];
[INFO] [stdout]   |         ^^^^ help: if this is intentional, prefix it with an underscore: `_nums`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `nums`
[INFO] [stdout]  --> src/jump-game-2.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let nums = vec![1, 2];
[INFO] [stdout]   |         ^^^^ help: if this is intentional, prefix it with an underscore: `_nums`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LRUCache` is never constructed
[INFO] [stdout]   --> src/lru-cache.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | struct LRUCache {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `LRUCache` has a derived impl for the trait `Default`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `get`, `put`, and `update_key` are never used
[INFO] [stdout]   --> src/lru-cache.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 20 | impl LRUCache {
[INFO] [stdout]    | ------------- associated items in this implementation
[INFO] [stdout] 21 |     fn new(capacity: i32) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 28 |     fn get(&mut self, key: i32) -> i32 {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 38 |     fn put(&mut self, key: i32, value: i32) {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 55 |     fn update_key(&mut self, key: i32) {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `words`
[INFO] [stdout]  --> src/justify.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let words: Vec<String> = vec![
[INFO] [stdout]   |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_words`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]  --> src/main.rs:9:62
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn merge(nums1: &mut Vec<i32>, m: i32, nums2: &mut Vec<i32>, n: i32) {
[INFO] [stdout]   |                                                              ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tank`
[INFO] [stdout]   --> src/gas-station.rs:53:13
[INFO] [stdout]    |
[INFO] [stdout] 53 |     let mut tank = 0;
[INFO] [stdout]    |             ^^^^ help: if this is intentional, prefix it with an underscore: `_tank`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/gas-station.rs:53:9
[INFO] [stdout]    |
[INFO] [stdout] 53 |     let mut tank = 0;
[INFO] [stdout]    |         ----^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `can_complete_circuit` is never used
[INFO] [stdout]   --> src/gas-station.rs:21:4
[INFO] [stdout]    |
[INFO] [stdout] 21 | fn can_complete_circuit(gas: Vec<i32>, cost: Vec<i32>) -> i32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `HashMap`
[INFO] [stdout]  --> src/contains-duplicate-2.rs:2:19
[INFO] [stdout]   |
[INFO] [stdout] 2 |     collections::{HashMap, HashSet},
[INFO] [stdout]   |                   ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `core::num`
[INFO] [stdout]  --> src/min-size-sub-sum.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use core::num;
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `cmp`, `collections::VecDeque`, and `ops::AddAssign`
[INFO] [stdout]  --> src/min-size-sub-sum.rs:2:11
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::{cmp, collections::VecDeque, i32, ops::AddAssign, usize};
[INFO] [stdout]   |           ^^^  ^^^^^^^^^^^^^^^^^^^^^       ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `target`
[INFO] [stdout]  --> src/min-size-sub-sum.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let (target, nums) = (7, vec![2, 3, 1, 2, 4, 3]);
[INFO] [stdout]   |          ^^^^^^ help: if this is intentional, prefix it with an underscore: `_target`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `nums`
[INFO] [stdout]  --> src/min-size-sub-sum.rs:5:18
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let (target, nums) = (7, vec![2, 3, 1, 2, 4, 3]);
[INFO] [stdout]   |                  ^^^^ help: if this is intentional, prefix it with an underscore: `_nums`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Duplicates` is never used
[INFO] [stdout]   --> src/contains-duplicate-2.rs:41:7
[INFO] [stdout]    |
[INFO] [stdout] 41 | trait Duplicates {
[INFO] [stdout]    |       ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `two_sum` is never used
[INFO] [stdout]   --> src/two-sum.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn two_sum(nums: Vec<i32>, target: i32) -> Vec<i32> {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_palindrome` is never used
[INFO] [stdout]  --> src/valid-palindrome.rs:9:4
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn is_palindrome(s: String) -> bool {
[INFO] [stdout]   |    ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `HashSet`, `ops::Sub`, `os::unix::raw::uid_t`, and `usize`
[INFO] [stdout]  --> src/sub-concat-words.rs:3:28
[INFO] [stdout]   |
[INFO] [stdout] 3 |     collections::{HashMap, HashSet},
[INFO] [stdout]   |                            ^^^^^^^
[INFO] [stdout] 4 |     ops::Sub,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 5 |     os::unix::raw::uid_t,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 6 |     usize,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated type alias `std::os::unix::raw::uid_t`: these type aliases are no longer supported by the standard library, the `libc` crate on crates.io should be used instead for the correct definitions
[INFO] [stdout]  --> src/sub-concat-words.rs:5:20
[INFO] [stdout]   |
[INFO] [stdout] 5 |     os::unix::raw::uid_t,
[INFO] [stdout]   |                    ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `num`
[INFO] [stdout]  --> src/int-roman.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let num = 3749;
[INFO] [stdout]   |         ^^^ help: if this is intentional, prefix it with an underscore: `_num`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `core::num`
[INFO] [stdout]  --> src/remove-duplicates.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use core::num;
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `HashSet`
[INFO] [stdout]  --> src/remove-duplicates.rs:3:29
[INFO] [stdout]   |
[INFO] [stdout] 3 |     collections::{BTreeSet, HashSet},
[INFO] [stdout]   |                             ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `remove_duplicates` is never used
[INFO] [stdout]   --> src/remove-duplicates.rs:13:4
[INFO] [stdout]    |
[INFO] [stdout] 13 | fn remove_duplicates(nums: &mut Vec<i32>) -> i32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `skip` is never used
[INFO] [stdout]   --> src/remove-duplicates.rs:28:4
[INFO] [stdout]    |
[INFO] [stdout] 28 | fn skip<'a>(value: i32, iter: &mut Peekable<impl Iterator<Item = &'a i32>>) {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `remove_duplicates_ez` is never used
[INFO] [stdout]   --> src/remove-duplicates.rs:39:4
[INFO] [stdout]    |
[INFO] [stdout] 39 | fn remove_duplicates_ez(nums: &mut Vec<i32>) -> i32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `remove_duplicates_traditional` is never used
[INFO] [stdout]   --> src/remove-duplicates.rs:55:4
[INFO] [stdout]    |
[INFO] [stdout] 55 | fn remove_duplicates_traditional(nums: &mut Vec<i32>) -> i32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]  --> src/roman-int.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 2 |     let s = String::from("III");
[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: `s`
[INFO] [stdout]  --> src/roman-int.rs:3:9
[INFO] [stdout]   |
[INFO] [stdout] 3 |     let s = String::from("LVIII");
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BTreeSet`, `HashMap`, and `ops::Deref`
[INFO] [stdout]  --> src/rain-water.rs:2:19
[INFO] [stdout]   |
[INFO] [stdout] 2 |     collections::{BTreeSet, HashMap, VecDeque},
[INFO] [stdout]   |                   ^^^^^^^^  ^^^^^^^
[INFO] [stdout] 3 |     ops::Deref,
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `draw_water` is never used
[INFO] [stdout]   --> src/rain-water.rs:69:8
[INFO] [stdout]    |
[INFO] [stdout] 67 | trait Graph {
[INFO] [stdout]    |       ----- method in this trait
[INFO] [stdout] 68 |     fn draw(&self);
[INFO] [stdout] 69 |     fn draw_water(&self, water: &Vec<(i32, i32)>);
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `search_rust` is never used
[INFO] [stdout]   --> src/search-rotate.rs:33:4
[INFO] [stdout]    |
[INFO] [stdout] 33 | fn search_rust(nums: Vec<i32>, target: i32) -> i32 {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `remove` is never used
[INFO] [stdout]   --> src/insert-delete-random.rs:29:8
[INFO] [stdout]    |
[INFO] [stdout] 18 | impl RandomizedSet {
[INFO] [stdout]    | ------------------ method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 29 |     fn remove(&mut self, val: i32) -> bool {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_happy` is never used
[INFO] [stdout]   --> src/happy-number.rs:12:4
[INFO] [stdout]    |
[INFO] [stdout] 12 | fn is_happy(mut n: i32) -> bool {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.61s
[INFO] running `Command { std: "docker" "inspect" "199fdb42327583c7acfd04795aa7ba5349db556ae5ad2bd86b5943795d939637", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "199fdb42327583c7acfd04795aa7ba5349db556ae5ad2bd86b5943795d939637", kill_on_drop: false }`
[INFO] [stdout] 199fdb42327583c7acfd04795aa7ba5349db556ae5ad2bd86b5943795d939637
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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 -Dtail-expr-drop-order" "-e" "RUSTDOCFLAGS=--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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d6b04cd377879dcc5430b4213e5de39fcdc1e414523273ffaf792c661ab24abd
[INFO] running `Command { std: "docker" "start" "-a" "d6b04cd377879dcc5430b4213e5de39fcdc1e414523273ffaf792c661ab24abd", kill_on_drop: false }`
[INFO] [stderr]    Compiling leetcode v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `collections::VecDeque`
[INFO] [stdout]  --> src/same-tree.rs:1:42
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{borrow::Borrow, cell::RefCell, collections::VecDeque, rc::Rc};
[INFO] [stdout]   |                                          ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `borrow::Borrow`
[INFO] [stdout]  --> src/same-tree.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{borrow::Borrow, cell::RefCell, collections::VecDeque, rc::Rc};
[INFO] [stdout]   |           ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `core::num`
[INFO] [stdout]  --> src/min-size-sub-sum.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use core::num;
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `cmp`, `collections::VecDeque`, and `ops::AddAssign`
[INFO] [stdout]  --> src/min-size-sub-sum.rs:2:11
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::{cmp, collections::VecDeque, i32, ops::AddAssign, usize};
[INFO] [stdout]   |           ^^^  ^^^^^^^^^^^^^^^^^^^^^       ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `nums`
[INFO] [stdout]  --> src/product-array.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 2 |     let nums = vec![1, 2, 3, 4];
[INFO] [stdout]   |         ^^^^ help: if this is intentional, prefix it with an underscore: `_nums`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `target`
[INFO] [stdout]  --> src/min-size-sub-sum.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let (target, nums) = (7, vec![2, 3, 1, 2, 4, 3]);
[INFO] [stdout]   |          ^^^^^^ help: if this is intentional, prefix it with an underscore: `_target`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_same_tree_rust` is never used
[INFO] [stdout]   --> src/same-tree.rs:29:4
[INFO] [stdout]    |
[INFO] [stdout] 29 | fn is_same_tree_rust(p: Option<Rc<RefCell<TreeNode>>>, q: Option<Rc<RefCell<TreeNode>>>) -> bool {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `nums`
[INFO] [stdout]  --> src/min-size-sub-sum.rs:5:18
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let (target, nums) = (7, vec![2, 3, 1, 2, 4, 3]);
[INFO] [stdout]   |                  ^^^^ help: if this is intentional, prefix it with an underscore: `_nums`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `words`
[INFO] [stdout]  --> src/justify.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let words: Vec<String> = vec![
[INFO] [stdout]   |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_words`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_palindrome` is never used
[INFO] [stdout]  --> src/valid-palindrome.rs:9:4
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn is_palindrome(s: String) -> bool {
[INFO] [stdout]   |    ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_anagram` is never used
[INFO] [stdout]  --> src/anagram.rs:9:4
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn is_anagram(s: String, t: String) -> bool {
[INFO] [stdout]   |    ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `two_sum` is never used
[INFO] [stdout]   --> src/two-sum.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn two_sum(nums: Vec<i32>, target: i32) -> Vec<i32> {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::iter::successors`
[INFO] [stdout]  --> src/remove-node-end.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::iter::successors;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `LinkedList`, `borrow::BorrowMut`, `cell::RefCell`, and `rc::Rc`
[INFO] [stdout]  --> src/lru-cache.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 |     borrow::BorrowMut,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 3 |     cell::RefCell,
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 4 |     collections::{HashMap, LinkedList, VecDeque},
[INFO] [stdout]   |                            ^^^^^^^^^^
[INFO] [stdout] 5 |     rc::Rc,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LRUCache` is never constructed
[INFO] [stdout]   --> src/lru-cache.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | struct LRUCache {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `LRUCache` has a derived impl for the trait `Default`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `get`, `put`, and `update_key` are never used
[INFO] [stdout]   --> src/lru-cache.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 20 | impl LRUCache {
[INFO] [stdout]    | ------------- associated items in this implementation
[INFO] [stdout] 21 |     fn new(capacity: i32) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 28 |     fn get(&mut self, key: i32) -> i32 {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 38 |     fn put(&mut self, key: i32, value: i32) {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 55 |     fn update_key(&mut self, key: i32) {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `thread::current`
[INFO] [stdout]  --> src/candy.rs:1:16
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{i32, thread::current};
[INFO] [stdout]   |                ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ratings`
[INFO] [stdout]  --> src/candy.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let ratings = vec![1, 0, 2];
[INFO] [stdout]   |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_ratings`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ratings`
[INFO] [stdout]  --> src/candy.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let ratings = vec![1, 2, 2];
[INFO] [stdout]   |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_ratings`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/candy.rs:15:10
[INFO] [stdout]    |
[INFO] [stdout] 15 | fn candy(mut ratings: Vec<i32>) -> i32 {
[INFO] [stdout]    |          ----^^^^^^^
[INFO] [stdout]    |          |
[INFO] [stdout]    |          help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `num`
[INFO] [stdout]  --> src/int-roman.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let num = 3749;
[INFO] [stdout]   |         ^^^ help: if this is intentional, prefix it with an underscore: `_num`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `rotate` is never used
[INFO] [stdout]   --> src/rotate-image.rs:15:4
[INFO] [stdout]    |
[INFO] [stdout] 15 | fn rotate(matrix: &mut Vec<Vec<i32>>) {
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `remove` is never used
[INFO] [stdout]   --> src/insert-delete-random.rs:29:8
[INFO] [stdout]    |
[INFO] [stdout] 18 | impl RandomizedSet {
[INFO] [stdout]    | ------------------ method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 29 |     fn remove(&mut self, val: i32) -> bool {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `iter::once`
[INFO] [stdout]  --> src/jump-game-2.rs:1:21
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{cmp::max, iter::once, usize};
[INFO] [stdout]   |                     ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `HashSet`, `ops::Sub`, `os::unix::raw::uid_t`, and `usize`
[INFO] [stdout]  --> src/sub-concat-words.rs:3:28
[INFO] [stdout]   |
[INFO] [stdout] 3 |     collections::{HashMap, HashSet},
[INFO] [stdout]   |                            ^^^^^^^
[INFO] [stdout] 4 |     ops::Sub,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 5 |     os::unix::raw::uid_t,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 6 |     usize,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `nums`
[INFO] [stdout]  --> src/jump-game-2.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let nums = vec![2, 3, 1, 1, 4];
[INFO] [stdout]   |         ^^^^ help: if this is intentional, prefix it with an underscore: `_nums`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `nums`
[INFO] [stdout]  --> src/jump-game-2.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let nums = vec![2, 3, 0, 1, 4];
[INFO] [stdout]   |         ^^^^ help: if this is intentional, prefix it with an underscore: `_nums`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `nums`
[INFO] [stdout]  --> src/jump-game-2.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let nums = vec![1, 2];
[INFO] [stdout]   |         ^^^^ help: if this is intentional, prefix it with an underscore: `_nums`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated type alias `std::os::unix::raw::uid_t`: these type aliases are no longer supported by the standard library, the `libc` crate on crates.io should be used instead for the correct definitions
[INFO] [stdout]  --> src/sub-concat-words.rs:5:20
[INFO] [stdout]   |
[INFO] [stdout] 5 |     os::unix::raw::uid_t,
[INFO] [stdout]   |                    ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BSTIteratorStack` is never constructed
[INFO] [stdout]   --> src/bt-iterator.rs:56:8
[INFO] [stdout]    |
[INFO] [stdout] 56 | struct BSTIteratorStack {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `next`, and `has_next` are never used
[INFO] [stdout]   --> src/bt-iterator.rs:61:8
[INFO] [stdout]    |
[INFO] [stdout] 60 | impl BSTIteratorStack {
[INFO] [stdout]    | --------------------- associated items in this implementation
[INFO] [stdout] 61 |     fn new(mut root: Option<Rc<RefCell<TreeNode>>>) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 72 |     fn next(&mut self) -> i32 {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 85 |     fn has_next(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::usize`
[INFO] [stdout]  --> src/jump-game.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::usize;
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]  --> src/roman-int.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 2 |     let s = String::from("III");
[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: `s`
[INFO] [stdout]  --> src/roman-int.rs:3:9
[INFO] [stdout]   |
[INFO] [stdout] 3 |     let s = String::from("LVIII");
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `days`
[INFO] [stdout]   --> src/best-buy-2.rs:11:13
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let mut days = prices.len();
[INFO] [stdout]    |             ^^^^ help: if this is intentional, prefix it with an underscore: `_days`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_happy` is never used
[INFO] [stdout]   --> src/happy-number.rs:12:4
[INFO] [stdout]    |
[INFO] [stdout] 12 | fn is_happy(mut n: i32) -> bool {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/best-buy-2.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let mut days = prices.len();
[INFO] [stdout]    |         ----^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `core::num`
[INFO] [stdout]  --> src/remove-duplicates.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use core::num;
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]  --> src/main.rs:9:62
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn merge(nums1: &mut Vec<i32>, m: i32, nums2: &mut Vec<i32>, n: i32) {
[INFO] [stdout]   |                                                              ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `HashSet`
[INFO] [stdout]  --> src/remove-duplicates.rs:3:29
[INFO] [stdout]   |
[INFO] [stdout] 3 |     collections::{BTreeSet, HashSet},
[INFO] [stdout]   |                             ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `pop`, `top`, and `get_min` are never used
[INFO] [stdout]   --> src/min-stack.rs:42:8
[INFO] [stdout]    |
[INFO] [stdout] 25 | impl MinStack {
[INFO] [stdout]    | ------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 42 |     fn pop(&mut self) {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 46 |     fn top(&self) -> i32 {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 50 |     fn get_min(&self) -> i32 {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `collections::HashMap`
[INFO] [stdout]  --> src/inorder-postorder-tree.rs:1:26
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{cell::RefCell, collections::HashMap, rc::Rc};
[INFO] [stdout]   |                          ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `remove_duplicates` is never used
[INFO] [stdout]   --> src/remove-duplicates.rs:13:4
[INFO] [stdout]    |
[INFO] [stdout] 13 | fn remove_duplicates(nums: &mut Vec<i32>) -> i32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `skip` is never used
[INFO] [stdout]   --> src/remove-duplicates.rs:28:4
[INFO] [stdout]    |
[INFO] [stdout] 28 | fn skip<'a>(value: i32, iter: &mut Peekable<impl Iterator<Item = &'a i32>>) {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `remove_duplicates_ez` is never used
[INFO] [stdout]   --> src/remove-duplicates.rs:39:4
[INFO] [stdout]    |
[INFO] [stdout] 39 | fn remove_duplicates_ez(nums: &mut Vec<i32>) -> i32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `remove_duplicates_traditional` is never used
[INFO] [stdout]   --> src/remove-duplicates.rs:55:4
[INFO] [stdout]    |
[INFO] [stdout] 55 | fn remove_duplicates_traditional(nums: &mut Vec<i32>) -> i32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BTreeSet`, `HashMap`, and `ops::Deref`
[INFO] [stdout]  --> src/rain-water.rs:2:19
[INFO] [stdout]   |
[INFO] [stdout] 2 |     collections::{BTreeSet, HashMap, VecDeque},
[INFO] [stdout]   |                   ^^^^^^^^  ^^^^^^^
[INFO] [stdout] 3 |     ops::Deref,
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tank`
[INFO] [stdout]   --> src/gas-station.rs:53:13
[INFO] [stdout]    |
[INFO] [stdout] 53 |     let mut tank = 0;
[INFO] [stdout]    |             ^^^^ help: if this is intentional, prefix it with an underscore: `_tank`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/gas-station.rs:53:9
[INFO] [stdout]    |
[INFO] [stdout] 53 |     let mut tank = 0;
[INFO] [stdout]    |         ----^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `can_complete_circuit` is never used
[INFO] [stdout]   --> src/gas-station.rs:21:4
[INFO] [stdout]    |
[INFO] [stdout] 21 | fn can_complete_circuit(gas: Vec<i32>, cost: Vec<i32>) -> i32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `draw_water` is never used
[INFO] [stdout]   --> src/rain-water.rs:69:8
[INFO] [stdout]    |
[INFO] [stdout] 67 | trait Graph {
[INFO] [stdout]    |       ----- method in this trait
[INFO] [stdout] 68 |     fn draw(&self);
[INFO] [stdout] 69 |     fn draw_water(&self, water: &Vec<(i32, i32)>);
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `HashMap`
[INFO] [stdout]  --> src/contains-duplicate-2.rs:2:19
[INFO] [stdout]   |
[INFO] [stdout] 2 |     collections::{HashMap, HashSet},
[INFO] [stdout]   |                   ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Duplicates` is never used
[INFO] [stdout]   --> src/contains-duplicate-2.rs:41:7
[INFO] [stdout]    |
[INFO] [stdout] 41 | trait Duplicates {
[INFO] [stdout]    |       ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `search_rust` is never used
[INFO] [stdout]   --> src/search-rotate.rs:33:4
[INFO] [stdout]    |
[INFO] [stdout] 33 | fn search_rust(nums: Vec<i32>, target: i32) -> i32 {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `max_depth` is never used
[INFO] [stdout]   --> src/max-depth-bt.rs:13:4
[INFO] [stdout]    |
[INFO] [stdout] 13 | fn max_depth(root: Option<Rc<RefCell<TreeNode>>>) -> i32 {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `max_depth_rec` is never used
[INFO] [stdout]   --> src/max-depth-bt.rs:21:4
[INFO] [stdout]    |
[INFO] [stdout] 21 | fn max_depth_rec(root: Option<Rc<RefCell<TreeNode>>>, deep: usize) -> usize {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `max_depth_int_dfs` is never used
[INFO] [stdout]   --> src/max-depth-bt.rs:66:4
[INFO] [stdout]    |
[INFO] [stdout] 66 | fn max_depth_int_dfs(root: Option<Rc<RefCell<TreeNode>>>) -> i32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 2.93s
[INFO] running `Command { std: "docker" "inspect" "d6b04cd377879dcc5430b4213e5de39fcdc1e414523273ffaf792c661ab24abd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d6b04cd377879dcc5430b4213e5de39fcdc1e414523273ffaf792c661ab24abd", kill_on_drop: false }`
[INFO] [stdout] d6b04cd377879dcc5430b4213e5de39fcdc1e414523273ffaf792c661ab24abd