[INFO] cloning repository https://github.com/123dou/learnRust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/123dou/learnRust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F123dou%2FlearnRust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F123dou%2FlearnRust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c3ef9c42a2fc2718d83bb99ecca7d4d7d872900b
[INFO] checking 123dou/learnRust against master#3aedcf06b73fc36feeebca3d579e1d2a6c40acc5 for pr-65819
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F123dou%2FlearnRust" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/123dou/learnRust on toolchain 3aedcf06b73fc36feeebca3d579e1d2a6c40acc5
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/123dou/learnRust
[INFO] finished tweaking git repo https://github.com/123dou/learnRust
[INFO] tweaked toml for git repo https://github.com/123dou/learnRust written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "rustops/crates-build-env@sha256:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 1699f9f68f6ba3390754298c3b8e28468a8719ff65e5b0e7f9a48cccf9f9e4e9
[INFO] running `Command { std: "docker" "start" "-a" "1699f9f68f6ba3390754298c3b8e28468a8719ff65e5b0e7f9a48cccf9f9e4e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1699f9f68f6ba3390754298c3b8e28468a8719ff65e5b0e7f9a48cccf9f9e4e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1699f9f68f6ba3390754298c3b8e28468a8719ff65e5b0e7f9a48cccf9f9e4e9", kill_on_drop: false }`
[INFO] [stdout] 1699f9f68f6ba3390754298c3b8e28468a8719ff65e5b0e7f9a48cccf9f9e4e9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a3802a2c8165040b1d8a034eb9188ca29963dff41593e8a5ef5f14eca787c8ab
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "a3802a2c8165040b1d8a034eb9188ca29963dff41593e8a5ef5f14eca787c8ab", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.93
[INFO] [stderr]    Compiling proc-macro2 v1.0.26
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.69
[INFO] [stderr]    Compiling serde_derive v1.0.125
[INFO] [stderr]    Compiling serde v1.0.125
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling gcc v0.3.55
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]     Checking rustc-serialize v0.3.24
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]     Checking itertools v0.9.0
[INFO] [stderr]    Compiling rust-crypto v0.2.36
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking getrandom v0.1.16
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking toml v0.5.8
[INFO] [stderr]     Checking learn_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0412]: cannot find type `Config` in this scope
[INFO] [stdout]   --> src/learn_open_source/toml_demo.rs:18:18
[INFO] [stdout]    |
[INFO] [stdout] 18 |     configs: Vec<Config>,
[INFO] [stdout]    |                  ^^^^^^ not found in this scope
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing this struct
[INFO] [stdout]    |
[INFO] [stdout] 1  | use crate::learn_open_source::config::Config;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::data_struct::link::Link`
[INFO] [stdout]  --> src/data_struct/link_test.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::data_struct::link::Link;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `toml::de::Error`
[INFO] [stdout]  --> src/learn_open_source/toml_demo.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use toml::de::Error;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::*`
[INFO] [stdout]  --> src/learn_open_source/toml_demo/tests.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use super::*;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `thread`, `time`
[INFO] [stdout]  --> src/sort/sort_test.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{thread, time};
[INFO] [stdout]   |           ^^^^^^  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::sort::sort`
[INFO] [stdout]  --> src/sort/sort_test.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use crate::sort::sort;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::VecDeque`
[INFO] [stdout]  --> src/test_std/test_string.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::collections::VecDeque;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Arc`, `Mutex`
[INFO] [stdout]  --> src/test_std/test_thread/test_thread.rs:1:17
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::sync::{Arc, Mutex};
[INFO] [stdout]   |                 ^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `channel`, `sync_channel`
[INFO] [stdout]  --> src/test_std/test_thread/test_channel.rs:1:23
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::sync::mpsc::{channel, sync_channel};
[INFO] [stdout]   |                       ^^^^^^^  ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::thread`
[INFO] [stdout]  --> src/test_std/test_thread/test_channel.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::thread;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `channel`
[INFO] [stdout]  --> src/test_std/test_thread/proof_of_work_demo.rs:6:23
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::sync::mpsc::{channel, Sender};
[INFO] [stdout]   |                       ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]  --> src/test_std/test_trait/test_map.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::collections::HashMap;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `rand::prelude::SliceRandom`
[INFO] [stdout]  --> src/test_std/test_trait/test_partition.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use rand::prelude::SliceRandom;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `rand::thread_rng`
[INFO] [stdout]  --> src/test_std/test_trait/test_partition.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use rand::thread_rng;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::borrow::Borrow`
[INFO] [stdout]   --> src/leetcode/editor/cn/easy/tree/symmetric_tree.rs:54:5
[INFO] [stdout]    |
[INFO] [stdout] 54 | use std::borrow::Borrow;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::borrow::Borrow`
[INFO] [stdout]   --> src/leetcode/editor/cn/easy/tree/validate_binary_search_tree.rs:54:5
[INFO] [stdout]    |
[INFO] [stdout] 54 | use std::borrow::Borrow;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 15 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0412`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `learn_rust`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: unused import: `std::borrow::Borrow`
[INFO] [stdout]   --> src/leetcode/editor/cn/easy/tree/symmetric_tree.rs:54:5
[INFO] [stdout]    |
[INFO] [stdout] 54 | use std::borrow::Borrow;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::borrow::Borrow`
[INFO] [stdout]   --> src/leetcode/editor/cn/easy/tree/validate_binary_search_tree.rs:54:5
[INFO] [stdout]    |
[INFO] [stdout] 54 | use std::borrow::Borrow;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `head_2` is never read
[INFO] [stdout]   --> src/leetcode/editor/cn/easy/List/palindrome_linked_list.rs:64:17
[INFO] [stdout]    |
[INFO] [stdout] 64 |         let mut head_2 = None;
[INFO] [stdout]    |                 ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `res` is never read
[INFO] [stdout]   --> src/leetcode/editor/cn/medium/other/evaluate_reverse_polish_notation.rs:91:17
[INFO] [stdout]    |
[INFO] [stdout] 91 |         let mut res = 0;
[INFO] [stdout]    |                 ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `min` is never read
[INFO] [stdout]   --> src/sort/sort.rs:23:13
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let mut min = i32::min_value();
[INFO] [stdout]    |             ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `NotFound`
[INFO] [stdout]   --> src/learn_open_source/error.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     NotFound,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `BadFilePath`
[INFO] [stdout]   --> src/learn_open_source/error.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 |     BadFilePath(PathBuf, &'static str),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `BadEntry`
[INFO] [stdout]   --> src/learn_open_source/error.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 |     BadEntry(String, PathBuf),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `BadType`
[INFO] [stdout]   --> src/learn_open_source/error.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 |     BadType(String, &'static str, &'static str, Option<PathBuf>),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/learn_open_source/toml_demo.rs:84:8
[INFO] [stdout]    |
[INFO] [stdout] 84 | struct Solution {}
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/leetcode/editor/cn/easy/List/delete_node_in_a_linked_list.rs:42:8
[INFO] [stdout]    |
[INFO] [stdout] 42 | struct Solution {}
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/leetcode/editor/cn/easy/List/linked_list_cycle.rs:48:8
[INFO] [stdout]    |
[INFO] [stdout] 48 | struct Solution {}
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/leetcode/editor/cn/easy/List/merge_two_sorted_lists.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | struct Solution {}
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `merge_two_lists`
[INFO] [stdout]   --> src/leetcode/editor/cn/easy/List/merge_two_sorted_lists.rs:26:12
[INFO] [stdout]    |
[INFO] [stdout] 26 |     pub fn merge_two_lists(
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/leetcode/editor/cn/easy/List/remove_nth_node_from_end_of_list.rs:30:8
[INFO] [stdout]    |
[INFO] [stdout] 30 | struct Solution {}
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `remove_nth_from_end1`
[INFO] [stdout]   --> src/leetcode/editor/cn/easy/List/remove_nth_node_from_end_of_list.rs:35:12
[INFO] [stdout]    |
[INFO] [stdout] 35 |     pub fn remove_nth_from_end1(mut head: Option<Box<ListNode>>, n: i32) -> Option<Box<ListNode>> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `remove_nth_from_end`
[INFO] [stdout]   --> src/leetcode/editor/cn/easy/List/remove_nth_node_from_end_of_list.rs:53:12
[INFO] [stdout]    |
[INFO] [stdout] 53 |     pub fn remove_nth_from_end(mut head: Option<Box<ListNode>>, n: i32) -> Option<Box<ListNode>> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/leetcode/editor/cn/easy/List/reverse_linked_list.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | struct Solution {}
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `reverse_list`
[INFO] [stdout]   --> src/leetcode/editor/cn/easy/List/reverse_linked_list.rs:41:12
[INFO] [stdout]    |
[INFO] [stdout] 41 |     pub fn reverse_list(head: Option<Box<ListNode>>) -> Option<Box<ListNode>> {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/leetcode/editor/cn/easy/array/remove_duplicates_from_sorted_array.rs:45:8
[INFO] [stdout]    |
[INFO] [stdout] 45 | struct Solution {}
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `remove_duplicates`
[INFO] [stdout]   --> src/leetcode/editor/cn/easy/array/remove_duplicates_from_sorted_array.rs:49:12
[INFO] [stdout]    |
[INFO] [stdout] 49 |     pub fn remove_duplicates(nums: &mut Vec<i32>) -> i32 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `remove_duplicates2`
[INFO] [stdout]   --> src/leetcode/editor/cn/easy/array/remove_duplicates_from_sorted_array.rs:63:12
[INFO] [stdout]    |
[INFO] [stdout] 63 |     pub fn remove_duplicates2(nums: &mut Vec<i32>) -> i32 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/leetcode/editor/cn/easy/array/reverse_string.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | struct Solution {}
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `reverse_string`
[INFO] [stdout]   --> src/leetcode/editor/cn/easy/array/reverse_string.rs:25:12
[INFO] [stdout]    |
[INFO] [stdout] 25 |     pub fn reverse_string(s: &mut Vec<char>) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `swap`
[INFO] [stdout]   --> src/leetcode/editor/cn/easy/array/reverse_string.rs:38:12
[INFO] [stdout]    |
[INFO] [stdout] 38 |     pub fn swap(s: &mut Vec<char>, i: usize, j: usize) {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/leetcode/editor/cn/easy/array/rotate_image.rs:53:8
[INFO] [stdout]    |
[INFO] [stdout] 53 | struct Solution {}
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `rotate`
[INFO] [stdout]   --> src/leetcode/editor/cn/easy/array/rotate_image.rs:57:12
[INFO] [stdout]    |
[INFO] [stdout] 57 |     pub fn rotate(matrix: &mut Vec<Vec<i32>>) {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `next_pos`
[INFO] [stdout]   --> src/leetcode/editor/cn/easy/array/rotate_image.rs:75:12
[INFO] [stdout]    |
[INFO] [stdout] 75 |     pub fn next_pos(pos: (usize, usize), n: usize) -> (usize, usize) {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/leetcode/editor/cn/easy/array/string_to_integer_atoi.rs:77:8
[INFO] [stdout]    |
[INFO] [stdout] 77 | struct Solution {}
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `my_atoi2`
[INFO] [stdout]   --> src/leetcode/editor/cn/easy/array/string_to_integer_atoi.rs:82:12
[INFO] [stdout]    |
[INFO] [stdout] 82 |     pub fn my_atoi2(str: String) -> i32 {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `my_atoi`
[INFO] [stdout]    --> src/leetcode/editor/cn/easy/array/string_to_integer_atoi.rs:124:12
[INFO] [stdout]     |
[INFO] [stdout] 124 |     pub fn my_atoi(str: String) -> i32 {
[INFO] [stdout]     |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/leetcode/editor/cn/easy/design/min_stack.rs:48:8
[INFO] [stdout]    |
[INFO] [stdout] 48 | struct Solution {}
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `MinStack`
[INFO] [stdout]   --> src/leetcode/editor/cn/easy/design/min_stack.rs:51:8
[INFO] [stdout]    |
[INFO] [stdout] 51 | struct MinStack {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/leetcode/editor/cn/easy/design/min_stack.rs:62:8
[INFO] [stdout]    |
[INFO] [stdout] 62 |     fn new() -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `push`
[INFO] [stdout]   --> src/leetcode/editor/cn/easy/design/min_stack.rs:69:8
[INFO] [stdout]    |
[INFO] [stdout] 69 |     fn push(&mut self, x: i32) {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `pop`
[INFO] [stdout]   --> src/leetcode/editor/cn/easy/design/min_stack.rs:76:8
[INFO] [stdout]    |
[INFO] [stdout] 76 |     fn pop(&mut self) {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `top`
[INFO] [stdout]   --> src/leetcode/editor/cn/easy/design/min_stack.rs:84:8
[INFO] [stdout]    |
[INFO] [stdout] 84 |     fn top(&self) -> i32 {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_min`
[INFO] [stdout]   --> src/leetcode/editor/cn/easy/design/min_stack.rs:88:8
[INFO] [stdout]    |
[INFO] [stdout] 88 |     fn get_min(&self) -> i32 {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/leetcode/editor/cn/easy/design/shuffle_an_array.rs:49:8
[INFO] [stdout]    |
[INFO] [stdout] 49 | struct Solution {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/leetcode/editor/cn/easy/design/shuffle_an_array.rs:59:8
[INFO] [stdout]    |
[INFO] [stdout] 59 |     fn new(nums: Vec<i32>) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `reset`
[INFO] [stdout]   --> src/leetcode/editor/cn/easy/design/shuffle_an_array.rs:67:8
[INFO] [stdout]    |
[INFO] [stdout] 67 |     fn reset(&self) -> Vec<i32> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `shuffle`
[INFO] [stdout]   --> src/leetcode/editor/cn/easy/design/shuffle_an_array.rs:72:8
[INFO] [stdout]    |
[INFO] [stdout] 72 |     fn shuffle(&self) -> Vec<i32> {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/leetcode/editor/cn/easy/dy/best_time_to_buy_and_sell_stock.rs:32:8
[INFO] [stdout]    |
[INFO] [stdout] 32 | struct Solution {}
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `max_profit`
[INFO] [stdout]   --> src/leetcode/editor/cn/easy/dy/best_time_to_buy_and_sell_stock.rs:36:12
[INFO] [stdout]    |
[INFO] [stdout] 36 |     pub fn max_profit(prices: Vec<i32>) -> i32 {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/leetcode/editor/cn/easy/dy/maximum_subarray.rs:22:8
[INFO] [stdout]    |
[INFO] [stdout] 22 | struct Solution {}
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `max_sub_array`
[INFO] [stdout]   --> src/leetcode/editor/cn/easy/dy/maximum_subarray.rs:26:12
[INFO] [stdout]    |
[INFO] [stdout] 26 |     pub fn max_sub_array(nums: Vec<i32>) -> i32 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/leetcode/editor/cn/easy/math/fizz_buzz.rs:40:8
[INFO] [stdout]    |
[INFO] [stdout] 40 | struct Solution {}
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `fizz_buzz`
[INFO] [stdout]   --> src/leetcode/editor/cn/easy/math/fizz_buzz.rs:44:12
[INFO] [stdout]    |
[INFO] [stdout] 44 |     pub fn fizz_buzz(n: i32) -> Vec<String> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/leetcode/editor/cn/easy/math/power_of_three.rs:59:8
[INFO] [stdout]    |
[INFO] [stdout] 59 | struct Solution {}
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_power_of_three`
[INFO] [stdout]   --> src/leetcode/editor/cn/easy/math/power_of_three.rs:63:12
[INFO] [stdout]    |
[INFO] [stdout] 63 |     pub fn is_power_of_three(n: i32) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/leetcode/editor/cn/easy/math/roman_to_integer.rs:74:8
[INFO] [stdout]    |
[INFO] [stdout] 74 | struct Solution {}
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `roman_to_int`
[INFO] [stdout]   --> src/leetcode/editor/cn/easy/math/roman_to_integer.rs:78:12
[INFO] [stdout]    |
[INFO] [stdout] 78 |     pub fn roman_to_int(s: String) -> i32 {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/leetcode/editor/cn/easy/other/hamming_distance.rs:31:8
[INFO] [stdout]    |
[INFO] [stdout] 31 | struct Solution {}
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `hamming_distance`
[INFO] [stdout]   --> src/leetcode/editor/cn/easy/other/hamming_distance.rs:35:12
[INFO] [stdout]    |
[INFO] [stdout] 35 |     pub fn hamming_distance(x: i32, y: i32) -> i32 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `count_one_of_num`
[INFO] [stdout]   --> src/leetcode/editor/cn/easy/other/hamming_distance.rs:39:12
[INFO] [stdout]    |
[INFO] [stdout] 39 |     pub fn count_one_of_num(num: u32) -> i32 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/leetcode/editor/cn/easy/other/missing_number.rs:60:8
[INFO] [stdout]    |
[INFO] [stdout] 60 | struct Solution {}
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `missing_number`
[INFO] [stdout]   --> src/leetcode/editor/cn/easy/other/missing_number.rs:64:12
[INFO] [stdout]    |
[INFO] [stdout] 64 |     pub fn missing_number(nums: Vec<i32>) -> i32 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/leetcode/editor/cn/easy/other/pascals_triangle.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 27 | struct Solution {}
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `generate`
[INFO] [stdout]   --> src/leetcode/editor/cn/easy/other/pascals_triangle.rs:31:12
[INFO] [stdout]    |
[INFO] [stdout] 31 |     pub fn generate(num_rows: i32) -> Vec<Vec<i32>> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/leetcode/editor/cn/easy/search_and_sort/first_bad_version.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 27 | struct Solution {}
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/leetcode/editor/cn/easy/tree/binary_tree_level_order_traversal.rs:56:8
[INFO] [stdout]    |
[INFO] [stdout] 56 | struct Solution {}
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `level_order`
[INFO] [stdout]   --> src/leetcode/editor/cn/easy/tree/binary_tree_level_order_traversal.rs:59:12
[INFO] [stdout]    |
[INFO] [stdout] 59 |     pub fn level_order(root: Option<Rc<RefCell<TreeNode>>>) -> Vec<Vec<i32>> {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/leetcode/editor/cn/easy/tree/maximum_depth_of_binary_tree.rs:32:8
[INFO] [stdout]    |
[INFO] [stdout] 32 | struct Solution {}
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `max_depth`
[INFO] [stdout]   --> src/leetcode/editor/cn/easy/tree/maximum_depth_of_binary_tree.rs:35:12
[INFO] [stdout]    |
[INFO] [stdout] 35 |     pub fn max_depth(root: Option<Rc<RefCell<TreeNode>>>) -> i32 {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/leetcode/editor/cn/easy/tree/symmetric_tree.rs:66:8
[INFO] [stdout]    |
[INFO] [stdout] 66 | struct Solution {}
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_symmetric`
[INFO] [stdout]   --> src/leetcode/editor/cn/easy/tree/symmetric_tree.rs:69:12
[INFO] [stdout]    |
[INFO] [stdout] 69 |     pub fn is_symmetric(root: Option<Rc<RefCell<TreeNode>>>) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_symmetric2`
[INFO] [stdout]   --> src/leetcode/editor/cn/easy/tree/symmetric_tree.rs:78:12
[INFO] [stdout]    |
[INFO] [stdout] 78 |     pub fn is_symmetric2(
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_symmetric3`
[INFO] [stdout]    --> src/leetcode/editor/cn/easy/tree/symmetric_tree.rs:103:12
[INFO] [stdout]     |
[INFO] [stdout] 103 |     pub fn is_symmetric3(root: Option<Rc<RefCell<TreeNode>>>) -> bool {
[INFO] [stdout]     |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `Tree`
[INFO] [stdout]    --> src/leetcode/editor/cn/easy/tree/symmetric_tree.rs:104:9
[INFO] [stdout]     |
[INFO] [stdout] 104 |         type Tree = Option<Rc<RefCell<TreeNode>>>;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `is_sym`
[INFO] [stdout]    --> src/leetcode/editor/cn/easy/tree/symmetric_tree.rs:105:12
[INFO] [stdout]     |
[INFO] [stdout] 105 |         fn is_sym(p: Tree, q: Tree) -> bool {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/leetcode/editor/cn/easy/tree/validate_binary_search_tree.rs:68:8
[INFO] [stdout]    |
[INFO] [stdout] 68 | struct Solution {}
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_valid_bst`
[INFO] [stdout]   --> src/leetcode/editor/cn/easy/tree/validate_binary_search_tree.rs:71:12
[INFO] [stdout]    |
[INFO] [stdout] 71 |     pub fn is_valid_bst(root: Option<Rc<RefCell<TreeNode>>>) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_valid_bst3`
[INFO] [stdout]   --> src/leetcode/editor/cn/easy/tree/validate_binary_search_tree.rs:76:12
[INFO] [stdout]    |
[INFO] [stdout] 76 |     pub fn is_valid_bst3(
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_valid_bst2`
[INFO] [stdout]   --> src/leetcode/editor/cn/easy/tree/validate_binary_search_tree.rs:93:12
[INFO] [stdout]    |
[INFO] [stdout] 93 |     pub fn is_valid_bst2(
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_valid_bst4`
[INFO] [stdout]    --> src/leetcode/editor/cn/easy/tree/validate_binary_search_tree.rs:119:12
[INFO] [stdout]     |
[INFO] [stdout] 119 |     pub fn is_valid_bst4(
[INFO] [stdout]     |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/leetcode/editor/cn/medium/array_and_string/group_anagrams.rs:31:8
[INFO] [stdout]    |
[INFO] [stdout] 31 | struct Solution {}
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `group_anagrams`
[INFO] [stdout]   --> src/leetcode/editor/cn/medium/array_and_string/group_anagrams.rs:34:12
[INFO] [stdout]    |
[INFO] [stdout] 34 |     pub fn group_anagrams(strs: Vec<String>) -> Vec<Vec<String>> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/leetcode/editor/cn/medium/array_and_string/longest_substring_without_repeating_characters.rs:37:8
[INFO] [stdout]    |
[INFO] [stdout] 37 | struct Solution {}
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `length_of_longest_substring`
[INFO] [stdout]   --> src/leetcode/editor/cn/medium/array_and_string/longest_substring_without_repeating_characters.rs:40:12
[INFO] [stdout]    |
[INFO] [stdout] 40 |     pub fn length_of_longest_substring(s: String) -> i32 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/leetcode/editor/cn/medium/array_and_string/set_matrix_zeroes.rs:50:8
[INFO] [stdout]    |
[INFO] [stdout] 50 | struct Solution {}
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `set_zeroes`
[INFO] [stdout]   --> src/leetcode/editor/cn/medium/array_and_string/set_matrix_zeroes.rs:53:12
[INFO] [stdout]    |
[INFO] [stdout] 53 |     pub fn set_zeroes(matrix: &mut Vec<Vec<i32>>) {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `set_zero_of_row`
[INFO] [stdout]   --> src/leetcode/editor/cn/medium/array_and_string/set_matrix_zeroes.rs:71:8
[INFO] [stdout]    |
[INFO] [stdout] 71 |     fn set_zero_of_row(arr: &mut Vec<Vec<i32>>, row: usize) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `set_zero_of_col`
[INFO] [stdout]   --> src/leetcode/editor/cn/medium/array_and_string/set_matrix_zeroes.rs:76:8
[INFO] [stdout]    |
[INFO] [stdout] 76 |     fn set_zero_of_col(arr: &mut Vec<Vec<i32>>, col: usize) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `letter_combinations1`
[INFO] [stdout]   --> src/leetcode/editor/cn/medium/back_tracking/letter_combinations_of_a_phone_number.rs:35:12
[INFO] [stdout]    |
[INFO] [stdout] 35 |     pub fn letter_combinations1(digits: String) -> Vec<String> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `back_tracing`
[INFO] [stdout]   --> src/leetcode/editor/cn/medium/back_tracking/letter_combinations_of_a_phone_number.rs:53:8
[INFO] [stdout]    |
[INFO] [stdout] 53 |     fn back_tracing(digits: &[u8], map: &HashMap<u8, Vec<u8>>, s: &str, res: &mut Vec<String>) {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/leetcode/editor/cn/medium/back_tracking/word_search.rs:39:8
[INFO] [stdout]    |
[INFO] [stdout] 39 | struct Solution {}
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `exist`
[INFO] [stdout]   --> src/leetcode/editor/cn/medium/back_tracking/word_search.rs:43:12
[INFO] [stdout]    |
[INFO] [stdout] 43 |     pub fn exist(mut board: Vec<Vec<char>>, word: String) -> bool {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/leetcode/editor/cn/medium/design_problem/insert_delete_getrandom_o1.rs:45:8
[INFO] [stdout]    |
[INFO] [stdout] 45 | struct Solution {}
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `RandomizedSet`
[INFO] [stdout]   --> src/leetcode/editor/cn/medium/design_problem/insert_delete_getrandom_o1.rs:48:8
[INFO] [stdout]    |
[INFO] [stdout] 48 | struct RandomizedSet {}
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/leetcode/editor/cn/medium/design_problem/insert_delete_getrandom_o1.rs:56:8
[INFO] [stdout]    |
[INFO] [stdout] 56 |     fn new() -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `insert`
[INFO] [stdout]   --> src/leetcode/editor/cn/medium/design_problem/insert_delete_getrandom_o1.rs:61:8
[INFO] [stdout]    |
[INFO] [stdout] 61 |     fn insert(&self, _val: i32) -> bool {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `remove`
[INFO] [stdout]   --> src/leetcode/editor/cn/medium/design_problem/insert_delete_getrandom_o1.rs:66:8
[INFO] [stdout]    |
[INFO] [stdout] 66 |     fn remove(&self, _val: i32) -> bool {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_random`
[INFO] [stdout]   --> src/leetcode/editor/cn/medium/design_problem/insert_delete_getrandom_o1.rs:71:8
[INFO] [stdout]    |
[INFO] [stdout] 71 |     fn get_random(&self) -> i32 {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/leetcode/editor/cn/medium/design_problem/serialize_and_deserialize_binary_tree.rs:99:8
[INFO] [stdout]    |
[INFO] [stdout] 99 | struct Solution {}
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Codec2`
[INFO] [stdout]    --> src/leetcode/editor/cn/medium/design_problem/serialize_and_deserialize_binary_tree.rs:101:8
[INFO] [stdout]     |
[INFO] [stdout] 101 | struct Codec2 {}
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]    --> src/leetcode/editor/cn/medium/design_problem/serialize_and_deserialize_binary_tree.rs:108:8
[INFO] [stdout]     |
[INFO] [stdout] 108 |     fn new() -> Self {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `serialize`
[INFO] [stdout]    --> src/leetcode/editor/cn/medium/design_problem/serialize_and_deserialize_binary_tree.rs:111:8
[INFO] [stdout]     |
[INFO] [stdout] 111 |     fn serialize(&self, root: Option<Rc<RefCell<TreeNode>>>) -> String {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `deserialize`
[INFO] [stdout]    --> src/leetcode/editor/cn/medium/design_problem/serialize_and_deserialize_binary_tree.rs:161:8
[INFO] [stdout]     |
[INFO] [stdout] 161 |     fn deserialize(&self, data: String) -> Option<Rc<RefCell<TreeNode>>> {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Codec3`
[INFO] [stdout]    --> src/leetcode/editor/cn/medium/design_problem/serialize_and_deserialize_binary_tree.rs:262:8
[INFO] [stdout]     |
[INFO] [stdout] 262 | struct Codec3 {}
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]    --> src/leetcode/editor/cn/medium/design_problem/serialize_and_deserialize_binary_tree.rs:269:8
[INFO] [stdout]     |
[INFO] [stdout] 269 |     fn new() -> Self {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `serialize`
[INFO] [stdout]    --> src/leetcode/editor/cn/medium/design_problem/serialize_and_deserialize_binary_tree.rs:272:8
[INFO] [stdout]     |
[INFO] [stdout] 272 |     fn serialize(&self, root: Option<Rc<RefCell<TreeNode>>>) -> String {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `serialize_tree`
[INFO] [stdout]    --> src/leetcode/editor/cn/medium/design_problem/serialize_and_deserialize_binary_tree.rs:279:8
[INFO] [stdout]     |
[INFO] [stdout] 279 |     fn serialize_tree(root: Option<Rc<RefCell<TreeNode>>>, res: &mut String) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `deserialize`
[INFO] [stdout]    --> src/leetcode/editor/cn/medium/design_problem/serialize_and_deserialize_binary_tree.rs:293:8
[INFO] [stdout]     |
[INFO] [stdout] 293 |     fn deserialize(&self, data: String) -> Option<Rc<RefCell<TreeNode>>> {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `deserialize_tree`
[INFO] [stdout]    --> src/leetcode/editor/cn/medium/design_problem/serialize_and_deserialize_binary_tree.rs:298:8
[INFO] [stdout]     |
[INFO] [stdout] 298 |     fn deserialize_tree(tree: &mut Vec<&str>) -> Option<Rc<RefCell<TreeNode>>> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/leetcode/editor/cn/medium/dp/jump_game.rs:29:8
[INFO] [stdout]    |
[INFO] [stdout] 29 | struct Solution {}
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `can_jump`
[INFO] [stdout]   --> src/leetcode/editor/cn/medium/dp/jump_game.rs:33:12
[INFO] [stdout]    |
[INFO] [stdout] 33 |     pub fn can_jump(nums: Vec<i32>) -> bool {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/leetcode/editor/cn/medium/dp/unique_paths.rs:57:8
[INFO] [stdout]    |
[INFO] [stdout] 57 | struct Solution {}
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `unique_paths`
[INFO] [stdout]   --> src/leetcode/editor/cn/medium/dp/unique_paths.rs:61:12
[INFO] [stdout]    |
[INFO] [stdout] 61 |     pub fn unique_paths(m: i32, n: i32) -> i32 {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/leetcode/editor/cn/medium/list/odd_even_linked_list.rs:34:8
[INFO] [stdout]    |
[INFO] [stdout] 34 | struct Solution {}
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `Node`
[INFO] [stdout]   --> src/leetcode/editor/cn/medium/list/odd_even_linked_list.rs:53:1
[INFO] [stdout]    |
[INFO] [stdout] 53 | type Node = Option<Box<ListNode>>;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `odd_even_list`
[INFO] [stdout]   --> src/leetcode/editor/cn/medium/list/odd_even_linked_list.rs:56:12
[INFO] [stdout]    |
[INFO] [stdout] 56 |     pub fn odd_even_list(mut head: Node) -> Node {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/leetcode/editor/cn/medium/math/excel_sheet_column_number.rs:43:8
[INFO] [stdout]    |
[INFO] [stdout] 43 | struct Solution {}
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `title_to_number`
[INFO] [stdout]   --> src/leetcode/editor/cn/medium/math/excel_sheet_column_number.rs:47:12
[INFO] [stdout]    |
[INFO] [stdout] 47 |     pub fn title_to_number(s: String) -> i32 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/leetcode/editor/cn/medium/math/factorial_trailing_zeroes.rs:25:8
[INFO] [stdout]    |
[INFO] [stdout] 25 | struct Solution {}
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `trailing_zeroes`
[INFO] [stdout]   --> src/leetcode/editor/cn/medium/math/factorial_trailing_zeroes.rs:30:12
[INFO] [stdout]    |
[INFO] [stdout] 30 |     pub fn trailing_zeroes(n: i32) -> i32 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/leetcode/editor/cn/medium/math/happy_number.rs:53:8
[INFO] [stdout]    |
[INFO] [stdout] 53 | struct Solution {}
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_happy`
[INFO] [stdout]   --> src/leetcode/editor/cn/medium/math/happy_number.rs:56:12
[INFO] [stdout]    |
[INFO] [stdout] 56 |     pub fn is_happy(n: i32) -> bool {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_happy_2`
[INFO] [stdout]   --> src/leetcode/editor/cn/medium/math/happy_number.rs:62:8
[INFO] [stdout]    |
[INFO] [stdout] 62 |     fn is_happy_2(mut n: i32, set: &mut HashSet<i32>) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/leetcode/editor/cn/medium/math/sqrtx.rs:29:8
[INFO] [stdout]    |
[INFO] [stdout] 29 | struct Solution {}
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `my_sqrt`
[INFO] [stdout]   --> src/leetcode/editor/cn/medium/math/sqrtx.rs:33:12
[INFO] [stdout]    |
[INFO] [stdout] 33 |     pub fn my_sqrt(x: i32) -> i32 {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `majority_element`
[INFO] [stdout]     --> src/leetcode/editor/cn/medium/other/majority_element.rs:1772:12
[INFO] [stdout]      |
[INFO] [stdout] 1772 |     pub fn majority_element(nums: Vec<i32>) -> i32 {
[INFO] [stdout]      |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/leetcode/editor/cn/medium/other/task_scheduler.rs:59:8
[INFO] [stdout]    |
[INFO] [stdout] 59 | struct Solution {}
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `least_interval`
[INFO] [stdout]   --> src/leetcode/editor/cn/medium/other/task_scheduler.rs:64:12
[INFO] [stdout]    |
[INFO] [stdout] 64 |     pub fn least_interval(tasks: Vec<char>, n: i32) -> i32 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/leetcode/editor/cn/medium/search_and_sort/kth_largest_element_in_an_array.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 26 | struct Solution {}
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `find_kth_largest2`
[INFO] [stdout]   --> src/leetcode/editor/cn/medium/search_and_sort/kth_largest_element_in_an_array.rs:30:12
[INFO] [stdout]    |
[INFO] [stdout] 30 |     pub fn find_kth_largest2(mut arr: Vec<i32>, k: i32) -> i32 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `find_kth_largest`
[INFO] [stdout]   --> src/leetcode/editor/cn/medium/search_and_sort/kth_largest_element_in_an_array.rs:34:12
[INFO] [stdout]    |
[INFO] [stdout] 34 |     pub fn find_kth_largest(mut min_heap: Vec<i32>, k: i32) -> i32 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/leetcode/editor/cn/medium/search_and_sort/merge_intervals.rs:36:8
[INFO] [stdout]    |
[INFO] [stdout] 36 | struct Solution {}
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `merge`
[INFO] [stdout]   --> src/leetcode/editor/cn/medium/search_and_sort/merge_intervals.rs:40:12
[INFO] [stdout]    |
[INFO] [stdout] 40 |     pub fn merge(mut arr: Vec<Vec<i32>>) -> Vec<Vec<i32>> {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/leetcode/editor/cn/medium/search_and_sort/search_a_2d_matrix_ii.rs:48:8
[INFO] [stdout]    |
[INFO] [stdout] 48 | struct Solution {}
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `search_matrix`
[INFO] [stdout]   --> src/leetcode/editor/cn/medium/search_and_sort/search_a_2d_matrix_ii.rs:52:12
[INFO] [stdout]    |
[INFO] [stdout] 52 |     pub fn search_matrix(matrix: Vec<Vec<i32>>, target: i32) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/leetcode/editor/cn/medium/search_and_sort/sort_colors.rs:65:8
[INFO] [stdout]    |
[INFO] [stdout] 65 | struct Solution {}
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `sort_colors`
[INFO] [stdout]   --> src/leetcode/editor/cn/medium/search_and_sort/sort_colors.rs:69:12
[INFO] [stdout]    |
[INFO] [stdout] 69 |     pub fn sort_colors(nums: &mut Vec<i32>) {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/leetcode/editor/cn/medium/tree_and_graph/binary_tree_inorder_traversal.rs:85:8
[INFO] [stdout]    |
[INFO] [stdout] 85 | struct Solution {}
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `inorder_traversal`
[INFO] [stdout]   --> src/leetcode/editor/cn/medium/tree_and_graph/binary_tree_inorder_traversal.rs:89:12
[INFO] [stdout]    |
[INFO] [stdout] 89 |     pub fn inorder_traversal(root: Option<Rc<RefCell<TreeNode>>>) -> Vec<i32> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `inorder_traversal2`
[INFO] [stdout]    --> src/leetcode/editor/cn/medium/tree_and_graph/binary_tree_inorder_traversal.rs:111:12
[INFO] [stdout]     |
[INFO] [stdout] 111 |     pub fn inorder_traversal2(root: Option<Rc<RefCell<TreeNode>>>) -> Vec<i32> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `inorder`
[INFO] [stdout]    --> src/leetcode/editor/cn/medium/tree_and_graph/binary_tree_inorder_traversal.rs:117:8
[INFO] [stdout]     |
[INFO] [stdout] 117 |     fn inorder(root: &Option<Rc<RefCell<TreeNode>>>, vec: &mut Vec<i32>) {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/leetcode/editor/cn/medium/tree_and_graph/kth_smallest_element_in_a_bst.rs:44:8
[INFO] [stdout]    |
[INFO] [stdout] 44 | struct Solution {}
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `Node`
[INFO] [stdout]   --> src/leetcode/editor/cn/medium/tree_and_graph/kth_smallest_element_in_a_bst.rs:66:1
[INFO] [stdout]    |
[INFO] [stdout] 66 | type Node = Option<Rc<RefCell<TreeNode>>>;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `kth_smallest`
[INFO] [stdout]   --> src/leetcode/editor/cn/medium/tree_and_graph/kth_smallest_element_in_a_bst.rs:69:12
[INFO] [stdout]    |
[INFO] [stdout] 69 |     pub fn kth_smallest(root: Node, k: i32) -> i32 {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `kth_smallest2`
[INFO] [stdout]   --> src/leetcode/editor/cn/medium/tree_and_graph/kth_smallest_element_in_a_bst.rs:74:8
[INFO] [stdout]    |
[INFO] [stdout] 74 |     fn kth_smallest2(root: &Node, curr: &mut i32, k: i32) -> i32 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/leetcode/editor/cn/medium/tree_and_graph/number_of_islands.rs:52:8
[INFO] [stdout]    |
[INFO] [stdout] 52 | struct Solution {}
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `num_islands`
[INFO] [stdout]   --> src/leetcode/editor/cn/medium/tree_and_graph/number_of_islands.rs:56:12
[INFO] [stdout]    |
[INFO] [stdout] 56 |     pub fn num_islands(mut grid: Vec<Vec<char>>) -> i32 {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `dfs`
[INFO] [stdout]   --> src/leetcode/editor/cn/medium/tree_and_graph/number_of_islands.rs:69:8
[INFO] [stdout]    |
[INFO] [stdout] 69 |     fn dfs(grid: &mut Vec<Vec<char>>, pos: (usize, usize)) {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/leetcode/editor/cn/medium/tree_and_graph/populating_next_right_pointers_in_each_node.rs:54:8
[INFO] [stdout]    |
[INFO] [stdout] 54 | struct Solution {}
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]   --> src/data_struct/link.rs:63:9
[INFO] [stdout]    |
[INFO] [stdout] 63 |         std::mem::replace(self, Self::None);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/learn_open_source/toml_demo.rs:60:5
[INFO] [stdout]    |
[INFO] [stdout] 60 |     de_from_file();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: module `ListNode` should have a snake case name
[INFO] [stdout]  --> src/leetcode/editor/cn/mod.rs:1:9
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub mod ListNode;
[INFO] [stdout]   |         ^^^^^^^^ help: convert the identifier to snake case: `list_node`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: module `TreeNode` should have a snake case name
[INFO] [stdout]  --> src/leetcode/editor/cn/mod.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub mod TreeNode;
[INFO] [stdout]   |         ^^^^^^^^ help: convert the identifier to snake case: `tree_node`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: module `List` should have a snake case name
[INFO] [stdout]  --> src/leetcode/editor/cn/easy/mod.rs:1:9
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub mod List;
[INFO] [stdout]   |         ^^^^ help: convert the identifier to snake case: `list`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `hammingWeight` should have a snake case name
[INFO] [stdout]   --> src/leetcode/editor/cn/easy/other/number_of_1_bits.rs:57:12
[INFO] [stdout]    |
[INFO] [stdout] 57 |     pub fn hammingWeight(n: u32) -> i32 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^ help: convert the identifier to snake case: `hamming_weight`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: comparison is useless due to type limits
[INFO] [stdout]   --> src/sort/sort.rs:44:15
[INFO] [stdout]    |
[INFO] [stdout] 44 |         while pre >= 0 && arr[pre] < curr {
[INFO] [stdout]    |               ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_comparisons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/test_std/test_thread/proof_of_work_demo.rs:63:13
[INFO] [stdout]    |
[INFO] [stdout] 63 |             tx.send(solution);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 152 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "a3802a2c8165040b1d8a034eb9188ca29963dff41593e8a5ef5f14eca787c8ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a3802a2c8165040b1d8a034eb9188ca29963dff41593e8a5ef5f14eca787c8ab", kill_on_drop: false }`
[INFO] [stdout] a3802a2c8165040b1d8a034eb9188ca29963dff41593e8a5ef5f14eca787c8ab