[INFO] cloning repository https://github.com/jiangbo212/leetcode-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jiangbo212/leetcode-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjiangbo212%2Fleetcode-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjiangbo212%2Fleetcode-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ae785400433c3065887a3df90d8cb255926ba685
[INFO] linting jiangbo212/leetcode-rust against nightly for clippy-nonminimal_bool-denied
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjiangbo212%2Fleetcode-rust" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/jiangbo212/leetcode-rust
[INFO] finished tweaking git repo https://github.com/jiangbo212/leetcode-rust
[INFO] tweaked toml for git repo https://github.com/jiangbo212/leetcode-rust written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/jiangbo212/leetcode-rust on toolchain nightly
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+nightly" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/jiangbo212/leetcode-rust 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" "+nightly" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+nightly" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f363cf235f6b3166e0fe2321269dc52c8dba608bd68052a166d75f6be73c9296
[INFO] running `Command { std: "docker" "start" "-a" "f363cf235f6b3166e0fe2321269dc52c8dba608bd68052a166d75f6be73c9296", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f363cf235f6b3166e0fe2321269dc52c8dba608bd68052a166d75f6be73c9296", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f363cf235f6b3166e0fe2321269dc52c8dba608bd68052a166d75f6be73c9296", kill_on_drop: false }`
[INFO] [stdout] f363cf235f6b3166e0fe2321269dc52c8dba608bd68052a166d75f6be73c9296
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+nightly" "clippy" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 81644076a8fa757ab117c12d8b55954b8b0e003214e552df098dfaedebf1d7e8
[INFO] running `Command { std: "docker" "start" "-a" "81644076a8fa757ab117c12d8b55954b8b0e003214e552df098dfaedebf1d7e8", kill_on_drop: false }`
[INFO] [stderr]     Checking leetcode-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `Solution` is never constructed
[INFO] [stdout]  --> src/solution.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Solution;
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `merge` is never used
[INFO] [stdout]  --> src/array/array_merge.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | impl Solution {
[INFO] [stdout]   | ------------- associated function in this implementation
[INFO] [stdout] 5 |     pub fn merge(nums1: &mut Vec<i32>, m: i32, nums2: &mut Vec<i32>, n: i32) {
[INFO] [stdout]   |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `remove_elements` is never used
[INFO] [stdout]  --> src/array/array_remove_elements.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | impl Solution {
[INFO] [stdout]   | ------------- associated function in this implementation
[INFO] [stdout] 4 |     pub fn remove_elements(nums: &mut Vec<i32>, val: i32) -> i32 {
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `remove_duplicates` is never used
[INFO] [stdout]  --> src/array/array_remove_duplicates.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | impl Solution {
[INFO] [stdout]   | ------------- associated function in this implementation
[INFO] [stdout] 4 |     pub fn remove_duplicates(nums: &mut Vec<i32>) -> i32 {
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `majority_element` is never used
[INFO] [stdout]  --> src/array/array_majority_element.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | impl Solution {
[INFO] [stdout]   | ------------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 8 |     pub fn majority_element(nums: Vec<i32>) -> i32 {
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `max_profit` is never used
[INFO] [stdout]  --> src/array/array_max_profit.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | impl Solution {
[INFO] [stdout]   | ------------- associated function in this implementation
[INFO] [stdout] 4 |     // 取每个最低点之后的最高差值，如果大于之前最低点的最高差值则变更最高差值，否则最高差值还是上次的
[INFO] [stdout] 5 |     pub fn max_profit(prices: Vec<i32>) -> i32 {
[INFO] [stdout]   |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `length_of_last_word` is never used
[INFO] [stdout]  --> src/array/array_length_or_last_word.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | impl Solution {
[INFO] [stdout]   | ------------- associated function in this implementation
[INFO] [stdout] 4 |     pub fn length_of_last_word(s:String) -> i32 {
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `roman_to_int` is never used
[INFO] [stdout]  --> src/array/array_roman_to_int.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | impl Solution {
[INFO] [stdout]   | ------------- associated function in this implementation
[INFO] [stdout] 4 |     pub fn roman_to_int(s:String) -> i32 {
[INFO] [stdout]   |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `longest_common_prefix` is never used
[INFO] [stdout]  --> src/array/array_longest_common_prefix.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | impl Solution {
[INFO] [stdout]   | ------------- associated function in this implementation
[INFO] [stdout] 4 |     pub fn longest_common_prefix(strs: Vec<String>) -> String {
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `str_str` is never used
[INFO] [stdout]  --> src/array/array_str_str.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | impl Solution {
[INFO] [stdout]   | ------------- associated function in this implementation
[INFO] [stdout] 4 |     pub fn str_str(haystack: String, needle: String) -> i32 {
[INFO] [stdout]   |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `remove_duplicates2` is never used
[INFO] [stdout]  --> src/array/array_remove_duplicates2.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | impl Solution {
[INFO] [stdout]   | ------------- associated function in this implementation
[INFO] [stdout] 4 |     pub fn remove_duplicates2(nums: &mut Vec<i32>) -> i32 {
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `rotate` is never used
[INFO] [stdout]  --> src/array/array_rotate.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | impl Solution {
[INFO] [stdout]   | ------------- associated function in this implementation
[INFO] [stdout] 4 |     pub fn rotate(nums: &mut Vec<i32>, k:i32) {
[INFO] [stdout]   |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `max_profit2` is never used
[INFO] [stdout]  --> src/array/array_max_profit2.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | impl Solution {
[INFO] [stdout]   | ------------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 8 |     pub fn max_profit2(prices: Vec<i32>) -> i32 {
[INFO] [stdout]   |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `can_jump` is never used
[INFO] [stdout]  --> src/array/array_can_jump.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | impl Solution {
[INFO] [stdout]   | ------------- associated function in this implementation
[INFO] [stdout] 4 |     pub fn can_jump(nums: Vec<i32>) -> bool {
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: it looks like you're manually copying between slices
[INFO] [stdout]   --> src/array/array_merge.rs:14:13
[INFO] [stdout]    |
[INFO] [stdout] 14 | /             for i in 0..n as usize {
[INFO] [stdout] 15 | |                 nums1[i] = nums2[i]
[INFO] [stdout] 16 | |             }
[INFO] [stdout]    | |_____________^ help: try replacing the loop by: `nums1[..(n as usize)].copy_from_slice(&nums2[..(n as usize)]);`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_memcpy
[INFO] [stdout]    = note: `#[warn(clippy::manual_memcpy)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of an assign operation
[INFO] [stdout]   --> src/array/array_merge.rs:35:21
[INFO] [stdout]    |
[INFO] [stdout] 35 |                     nums2_index = nums2_index + 1;
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `nums2_index += 1`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stdout]    = note: `#[warn(clippy::assign_op_pattern)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of an assign operation
[INFO] [stdout]   --> src/array/array_merge.rs:47:21
[INFO] [stdout]    |
[INFO] [stdout] 47 |                     nums2_index  = nums2_index + 1;
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `nums2_index += 1`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the loop variable `i` is only used to index `nums1`
[INFO] [stdout]   --> src/array/array_merge.rs:54:22
[INFO] [stdout]    |
[INFO] [stdout] 54 |             for i in (nums1_index+1)..m as usize {
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stdout]    = note: `#[warn(clippy::needless_range_loop)]` on by default
[INFO] [stdout] help: consider using an iterator
[INFO] [stdout]    |
[INFO] [stdout] 54 -             for i in (nums1_index+1)..m as usize {
[INFO] [stdout] 54 +             for <item> in nums1.iter().take(m as usize).skip((nums1_index+1)) {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the loop variable `i` is only used to index `nums2`
[INFO] [stdout]   --> src/array/array_merge.rs:62:22
[INFO] [stdout]    |
[INFO] [stdout] 62 |             for i in nums2_index..n as usize {
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stdout] help: consider using an iterator
[INFO] [stdout]    |
[INFO] [stdout] 62 -             for i in nums2_index..n as usize {
[INFO] [stdout] 62 +             for <item> in nums2.iter().take(n as usize).skip(nums2_index) {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: it looks like you're manually copying between slices
[INFO] [stdout]   --> src/array/array_merge.rs:69:9
[INFO] [stdout]    |
[INFO] [stdout] 69 | /         for i in 0..(m+n) as usize {
[INFO] [stdout] 70 | |             nums1[i] = temp_vec[i]
[INFO] [stdout] 71 | |         }
[INFO] [stdout]    | |_________^ help: try replacing the loop by: `nums1[..((m+n) as usize)].copy_from_slice(&temp_vec[..((m+n) as usize)]);`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_memcpy
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of an assign operation
[INFO] [stdout]   --> src/array/array_remove_elements.rs:18:17
[INFO] [stdout]    |
[INFO] [stdout] 18 |                 del_element_num = del_element_num + 1;
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `del_element_num += 1`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of an assign operation
[INFO] [stdout]   --> src/array/array_remove_duplicates.rs:19:17
[INFO] [stdout]    |
[INFO] [stdout] 19 |                 del_element_num = del_element_num + 1;
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `del_element_num += 1`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of an assign operation
[INFO] [stdout]   --> src/array/array_majority_element.rs:14:17
[INFO] [stdout]    |
[INFO] [stdout] 14 |                 count = count + 1;
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^ help: replace it with: `count += 1`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of an assign operation
[INFO] [stdout]   --> src/array/array_majority_element.rs:19:17
[INFO] [stdout]    |
[INFO] [stdout] 19 |                 count = count + 1;
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^ help: replace it with: `count += 1`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of an assign operation
[INFO] [stdout]   --> src/array/array_majority_element.rs:21:17
[INFO] [stdout]    |
[INFO] [stdout] 21 |                 count = count -1 ;
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^ help: replace it with: `count -= 1`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: equality checks against true are unnecessary
[INFO] [stdout]   --> src/array/array_length_or_last_word.rs:12:20
[INFO] [stdout]    |
[INFO] [stdout] 12 |                 if space_mark == true {
[INFO] [stdout]    |                    ^^^^^^^^^^^^^^^^^^ help: try: `space_mark`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#bool_comparison
[INFO] [stdout]    = note: `#[warn(clippy::bool_comparison)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of an assign operation
[INFO] [stdout]   --> src/array/array_length_or_last_word.rs:16:17
[INFO] [stdout]    |
[INFO] [stdout] 16 |                 length_of_last_world = length_of_last_world + 1;
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `length_of_last_world += 1`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of an assign operation
[INFO] [stdout]   --> src/array/array_roman_to_int.rs:27:25
[INFO] [stdout]    |
[INFO] [stdout] 27 |                         output_int = output_int + (roman_int[index] - roman_int[subtract_mark_index])
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `output_int += (roman_int[index] - roman_int[subtract_mark_index])`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of an assign operation
[INFO] [stdout]   --> src/array/array_roman_to_int.rs:32:29
[INFO] [stdout]    |
[INFO] [stdout] 32 | ...                   output_int = output_int + roman_int[subtract_mark_index];
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `output_int += roman_int[subtract_mark_index]`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of an assign operation
[INFO] [stdout]   --> src/array/array_roman_to_int.rs:40:29
[INFO] [stdout]    |
[INFO] [stdout] 40 | ...                   output_int = output_int + roman_int[index];
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `output_int += roman_int[index]`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of an assign operation
[INFO] [stdout]   --> src/array/array_roman_to_int.rs:51:13
[INFO] [stdout]    |
[INFO] [stdout] 51 |             output_int = output_int + roman_int[subtract_mark_index];
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `output_int += roman_int[subtract_mark_index]`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless use of `format!`
[INFO] [stdout]   --> src/array/array_longest_common_prefix.rs:12:20
[INFO] [stdout]    |
[INFO] [stdout] 12 |             return format!("{}", strs[0]);
[INFO] [stdout]    |                    ^^^^^^^^^^^^^^^^^^^^^^ help: consider using `.to_string()`: `strs[0].to_string()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stdout]    = note: `#[warn(clippy::useless_format)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the loop variable `str_index` is used to index `strs`
[INFO] [stdout]   --> src/array/array_longest_common_prefix.rs:16:30
[INFO] [stdout]    |
[INFO] [stdout] 16 |             for str_index in 0..length {
[INFO] [stdout]    |                              ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stdout] help: consider using an iterator and enumerate()
[INFO] [stdout]    |
[INFO] [stdout] 16 -             for str_index in 0..length {
[INFO] [stdout] 16 +             for (str_index, <item>) in strs.iter().enumerate().take(length) {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: binary comparison to literal `Option::None`
[INFO] [stdout]   --> src/array/array_longest_common_prefix.rs:25:20
[INFO] [stdout]    |
[INFO] [stdout] 25 |                 if compare_char == None || str_index ==0 {
[INFO] [stdout]    |                    ^^^^^^^^^^^^^^^^^^^^ help: use `Option::is_none()` instead: `compare_char.is_none()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#partialeq_to_none
[INFO] [stdout]    = note: `#[warn(clippy::partialeq_to_none)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of an assign operation
[INFO] [stdout]   --> src/array/array_longest_common_prefix.rs:33:29
[INFO] [stdout]    |
[INFO] [stdout] 33 | ...                   char_index = char_index + 1;
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `char_index += 1`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the loop variable `needle_index` is used to index `needle_chars`
[INFO] [stdout]   --> src/array/array_str_str.rs:14:33
[INFO] [stdout]    |
[INFO] [stdout] 14 |             for needle_index in 0.. needle_length {
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stdout] help: consider using an iterator and enumerate()
[INFO] [stdout]    |
[INFO] [stdout] 14 -             for needle_index in 0.. needle_length {
[INFO] [stdout] 14 +             for (needle_index, <item>) in needle_chars.iter().enumerate().take(needle_length) {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: binary comparison to literal `Option::None`
[INFO] [stdout]   --> src/array/array_remove_duplicates2.rs:15:16
[INFO] [stdout]    |
[INFO] [stdout] 15 |             if previous_value == None {
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^^^^^^^ help: use `Option::is_none()` instead: `previous_value.is_none()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#partialeq_to_none
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of an assign operation
[INFO] [stdout]   --> src/array/array_remove_duplicates2.rs:17:17
[INFO] [stdout]    |
[INFO] [stdout] 17 |                 duplicates_num = duplicates_num + 1;
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `duplicates_num += 1`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of an assign operation
[INFO] [stdout]   --> src/array/array_remove_duplicates2.rs:22:25
[INFO] [stdout]    |
[INFO] [stdout] 22 |                         duplicates_num = duplicates_num + 1;
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `duplicates_num += 1`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of an assign operation
[INFO] [stdout]   --> src/array/array_remove_duplicates2.rs:27:25
[INFO] [stdout]    |
[INFO] [stdout] 27 |                         del_num = del_num + 1;
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `del_num += 1`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the loop variable `index` is used to index `new_nums`
[INFO] [stdout]   --> src/array/array_rotate.rs:17:26
[INFO] [stdout]    |
[INFO] [stdout] 17 |             for index in 0..num_length {
[INFO] [stdout]    |                          ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stdout] help: consider using an iterator and enumerate()
[INFO] [stdout]    |
[INFO] [stdout] 17 -             for index in 0..num_length {
[INFO] [stdout] 17 +             for (index, <item>) in new_nums.iter_mut().enumerate().take(num_length) {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: it looks like you're manually copying between slices
[INFO] [stdout]   --> src/array/array_rotate.rs:25:13
[INFO] [stdout]    |
[INFO] [stdout] 25 | /             for index in 0..num_length {
[INFO] [stdout] 26 | |                 nums[index] = new_nums[index];
[INFO] [stdout] 27 | |             }
[INFO] [stdout]    | |_____________^ help: try replacing the loop by: `nums[..num_length].copy_from_slice(&new_nums[..num_length]);`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_memcpy
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of an assign operation
[INFO] [stdout]   --> src/array/array_max_profit2.rs:16:17
[INFO] [stdout]    |
[INFO] [stdout] 16 |                 profit = profit + (prices[next_index] - prices[index]);
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `profit += (prices[next_index] - prices[index])`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of an assign operation
[INFO] [stdout]   --> src/array/array_max_profit2.rs:18:13
[INFO] [stdout]    |
[INFO] [stdout] 18 |             index = index + 1;
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^ help: replace it with: `index += 1`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this boolean expression can be simplified
[INFO] [stdout]   --> src/array/array_can_jump.rs:40:16
[INFO] [stdout]    |
[INFO] [stdout] 40 |             if !jump_result.is_none() {
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^^^^^^^ help: try: `jump_result.is_some()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#nonminimal_bool
[INFO] [stdout]    = note: `#[warn(clippy::nonminimal_bool)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: called `unwrap` on `jump_result` after checking its variant with `is_none`
[INFO] [stdout]   --> src/array/array_can_jump.rs:41:24
[INFO] [stdout]    |
[INFO] [stdout] 40 |             if !jump_result.is_none() {
[INFO] [stdout]    |                 --------------------- the check is happening here
[INFO] [stdout] 41 |                 return jump_result.unwrap();
[INFO] [stdout]    |                        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: try using `match`
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_unwrap
[INFO] [stdout]    = note: `#[warn(clippy::unnecessary_unwrap)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/array/array_can_jump.rs:45:9
[INFO] [stdout]    |
[INFO] [stdout] 45 |         return false;
[INFO] [stdout]    |         ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout]    = note: `#[warn(clippy::needless_return)]` on by default
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 45 -         return false;
[INFO] [stdout] 45 +         false
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: equality checks against true are unnecessary
[INFO] [stdout]   --> src/array/array_can_jump.rs:29:20
[INFO] [stdout]    |
[INFO] [stdout] 29 |                 if jump_result.unwrap_or(false) == true {
[INFO] [stdout]    |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `jump_result.unwrap_or(false)`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#bool_comparison
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless use of `vec!`
[INFO] [stdout]  --> src/array/array_roman_to_int.rs:7:26
[INFO] [stdout]   |
[INFO] [stdout] 7 |         let roman_char = vec!['I', 'V', 'X', 'L', 'C','D', 'M'];
[INFO] [stdout]   |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: you can use an array directly: `['I', 'V', 'X', 'L', 'C','D', 'M']`
[INFO] [stdout]   |
[INFO] [stdout]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_vec
[INFO] [stdout]   = note: `#[warn(clippy::useless_vec)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless use of `vec!`
[INFO] [stdout]  --> src/array/array_roman_to_int.rs:8:25
[INFO] [stdout]   |
[INFO] [stdout] 8 |         let roman_int = vec![1, 5, 10, 50, 100, 500, 1000];
[INFO] [stdout]   |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: you can use an array directly: `[1, 5, 10, 50, 100, 500, 1000]`
[INFO] [stdout]   |
[INFO] [stdout]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_vec
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: it looks like you're manually copying between slices
[INFO] [stdout]   --> src/array/array_merge.rs:14:13
[INFO] [stdout]    |
[INFO] [stdout] 14 | /             for i in 0..n as usize {
[INFO] [stdout] 15 | |                 nums1[i] = nums2[i]
[INFO] [stdout] 16 | |             }
[INFO] [stdout]    | |_____________^ help: try replacing the loop by: `nums1[..(n as usize)].copy_from_slice(&nums2[..(n as usize)]);`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_memcpy
[INFO] [stdout]    = note: `#[warn(clippy::manual_memcpy)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of an assign operation
[INFO] [stdout]   --> src/array/array_merge.rs:35:21
[INFO] [stdout]    |
[INFO] [stdout] 35 |                     nums2_index = nums2_index + 1;
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `nums2_index += 1`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stdout]    = note: `#[warn(clippy::assign_op_pattern)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of an assign operation
[INFO] [stdout]   --> src/array/array_merge.rs:47:21
[INFO] [stdout]    |
[INFO] [stdout] 47 |                     nums2_index  = nums2_index + 1;
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `nums2_index += 1`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the loop variable `i` is only used to index `nums1`
[INFO] [stdout]   --> src/array/array_merge.rs:54:22
[INFO] [stdout]    |
[INFO] [stdout] 54 |             for i in (nums1_index+1)..m as usize {
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stdout]    = note: `#[warn(clippy::needless_range_loop)]` on by default
[INFO] [stdout] help: consider using an iterator
[INFO] [stdout]    |
[INFO] [stdout] 54 -             for i in (nums1_index+1)..m as usize {
[INFO] [stdout] 54 +             for <item> in nums1.iter().take(m as usize).skip((nums1_index+1)) {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the loop variable `i` is only used to index `nums2`
[INFO] [stdout]   --> src/array/array_merge.rs:62:22
[INFO] [stdout]    |
[INFO] [stdout] 62 |             for i in nums2_index..n as usize {
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stdout] help: consider using an iterator
[INFO] [stdout]    |
[INFO] [stdout] 62 -             for i in nums2_index..n as usize {
[INFO] [stdout] 62 +             for <item> in nums2.iter().take(n as usize).skip(nums2_index) {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: it looks like you're manually copying between slices
[INFO] [stdout]   --> src/array/array_merge.rs:69:9
[INFO] [stdout]    |
[INFO] [stdout] 69 | /         for i in 0..(m+n) as usize {
[INFO] [stdout] 70 | |             nums1[i] = temp_vec[i]
[INFO] [stdout] 71 | |         }
[INFO] [stdout]    | |_________^ help: try replacing the loop by: `nums1[..((m+n) as usize)].copy_from_slice(&temp_vec[..((m+n) as usize)]);`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_memcpy
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of an assign operation
[INFO] [stdout]   --> src/array/array_remove_elements.rs:18:17
[INFO] [stdout]    |
[INFO] [stdout] 18 |                 del_element_num = del_element_num + 1;
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `del_element_num += 1`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of an assign operation
[INFO] [stdout]   --> src/array/array_remove_duplicates.rs:19:17
[INFO] [stdout]    |
[INFO] [stdout] 19 |                 del_element_num = del_element_num + 1;
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `del_element_num += 1`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of an assign operation
[INFO] [stdout]   --> src/array/array_majority_element.rs:14:17
[INFO] [stdout]    |
[INFO] [stdout] 14 |                 count = count + 1;
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^ help: replace it with: `count += 1`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of an assign operation
[INFO] [stdout]   --> src/array/array_majority_element.rs:19:17
[INFO] [stdout]    |
[INFO] [stdout] 19 |                 count = count + 1;
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^ help: replace it with: `count += 1`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of an assign operation
[INFO] [stdout]   --> src/array/array_majority_element.rs:21:17
[INFO] [stdout]    |
[INFO] [stdout] 21 |                 count = count -1 ;
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^ help: replace it with: `count -= 1`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: equality checks against true are unnecessary
[INFO] [stdout]   --> src/array/array_length_or_last_word.rs:12:20
[INFO] [stdout]    |
[INFO] [stdout] 12 |                 if space_mark == true {
[INFO] [stdout]    |                    ^^^^^^^^^^^^^^^^^^ help: try: `space_mark`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#bool_comparison
[INFO] [stdout]    = note: `#[warn(clippy::bool_comparison)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of an assign operation
[INFO] [stdout]   --> src/array/array_length_or_last_word.rs:16:17
[INFO] [stdout]    |
[INFO] [stdout] 16 |                 length_of_last_world = length_of_last_world + 1;
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `length_of_last_world += 1`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of an assign operation
[INFO] [stdout]   --> src/array/array_roman_to_int.rs:27:25
[INFO] [stdout]    |
[INFO] [stdout] 27 |                         output_int = output_int + (roman_int[index] - roman_int[subtract_mark_index])
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `output_int += (roman_int[index] - roman_int[subtract_mark_index])`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of an assign operation
[INFO] [stdout]   --> src/array/array_roman_to_int.rs:32:29
[INFO] [stdout]    |
[INFO] [stdout] 32 | ...                   output_int = output_int + roman_int[subtract_mark_index];
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `output_int += roman_int[subtract_mark_index]`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of an assign operation
[INFO] [stdout]   --> src/array/array_roman_to_int.rs:40:29
[INFO] [stdout]    |
[INFO] [stdout] 40 | ...                   output_int = output_int + roman_int[index];
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `output_int += roman_int[index]`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of an assign operation
[INFO] [stdout]   --> src/array/array_roman_to_int.rs:51:13
[INFO] [stdout]    |
[INFO] [stdout] 51 |             output_int = output_int + roman_int[subtract_mark_index];
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `output_int += roman_int[subtract_mark_index]`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless use of `format!`
[INFO] [stdout]   --> src/array/array_roman_to_int.rs:71:48
[INFO] [stdout]    |
[INFO] [stdout] 71 |             let value = Solution::roman_to_int(format!("{}", s));
[INFO] [stdout]    |                                                ^^^^^^^^^^^^^^^^ help: consider using `.to_string()`: `s.to_string()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stdout]    = note: `#[warn(clippy::useless_format)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless use of `format!`
[INFO] [stdout]   --> src/array/array_longest_common_prefix.rs:12:20
[INFO] [stdout]    |
[INFO] [stdout] 12 |             return format!("{}", strs[0]);
[INFO] [stdout]    |                    ^^^^^^^^^^^^^^^^^^^^^^ help: consider using `.to_string()`: `strs[0].to_string()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the loop variable `str_index` is used to index `strs`
[INFO] [stdout]   --> src/array/array_longest_common_prefix.rs:16:30
[INFO] [stdout]    |
[INFO] [stdout] 16 |             for str_index in 0..length {
[INFO] [stdout]    |                              ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stdout] help: consider using an iterator and enumerate()
[INFO] [stdout]    |
[INFO] [stdout] 16 -             for str_index in 0..length {
[INFO] [stdout] 16 +             for (str_index, <item>) in strs.iter().enumerate().take(length) {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: binary comparison to literal `Option::None`
[INFO] [stdout]   --> src/array/array_longest_common_prefix.rs:25:20
[INFO] [stdout]    |
[INFO] [stdout] 25 |                 if compare_char == None || str_index ==0 {
[INFO] [stdout]    |                    ^^^^^^^^^^^^^^^^^^^^ help: use `Option::is_none()` instead: `compare_char.is_none()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#partialeq_to_none
[INFO] [stdout]    = note: `#[warn(clippy::partialeq_to_none)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of an assign operation
[INFO] [stdout]   --> src/array/array_longest_common_prefix.rs:33:29
[INFO] [stdout]    |
[INFO] [stdout] 33 | ...                   char_index = char_index + 1;
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `char_index += 1`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the loop variable `needle_index` is used to index `needle_chars`
[INFO] [stdout]   --> src/array/array_str_str.rs:14:33
[INFO] [stdout]    |
[INFO] [stdout] 14 |             for needle_index in 0.. needle_length {
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stdout] help: consider using an iterator and enumerate()
[INFO] [stdout]    |
[INFO] [stdout] 14 -             for needle_index in 0.. needle_length {
[INFO] [stdout] 14 +             for (needle_index, <item>) in needle_chars.iter().enumerate().take(needle_length) {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: binary comparison to literal `Option::None`
[INFO] [stdout]   --> src/array/array_remove_duplicates2.rs:15:16
[INFO] [stdout]    |
[INFO] [stdout] 15 |             if previous_value == None {
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^^^^^^^ help: use `Option::is_none()` instead: `previous_value.is_none()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#partialeq_to_none
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of an assign operation
[INFO] [stdout]   --> src/array/array_remove_duplicates2.rs:17:17
[INFO] [stdout]    |
[INFO] [stdout] 17 |                 duplicates_num = duplicates_num + 1;
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `duplicates_num += 1`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of an assign operation
[INFO] [stdout]   --> src/array/array_remove_duplicates2.rs:22:25
[INFO] [stdout]    |
[INFO] [stdout] 22 |                         duplicates_num = duplicates_num + 1;
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `duplicates_num += 1`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of an assign operation
[INFO] [stdout]   --> src/array/array_remove_duplicates2.rs:27:25
[INFO] [stdout]    |
[INFO] [stdout] 27 |                         del_num = del_num + 1;
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `del_num += 1`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the loop variable `index` is used to index `new_nums`
[INFO] [stdout]   --> src/array/array_rotate.rs:17:26
[INFO] [stdout]    |
[INFO] [stdout] 17 |             for index in 0..num_length {
[INFO] [stdout]    |                          ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stdout] help: consider using an iterator and enumerate()
[INFO] [stdout]    |
[INFO] [stdout] 17 -             for index in 0..num_length {
[INFO] [stdout] 17 +             for (index, <item>) in new_nums.iter_mut().enumerate().take(num_length) {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: it looks like you're manually copying between slices
[INFO] [stdout]   --> src/array/array_rotate.rs:25:13
[INFO] [stdout]    |
[INFO] [stdout] 25 | /             for index in 0..num_length {
[INFO] [stdout] 26 | |                 nums[index] = new_nums[index];
[INFO] [stdout] 27 | |             }
[INFO] [stdout]    | |_____________^ help: try replacing the loop by: `nums[..num_length].copy_from_slice(&new_nums[..num_length]);`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_memcpy
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of an assign operation
[INFO] [stdout]   --> src/array/array_max_profit2.rs:16:17
[INFO] [stdout]    |
[INFO] [stdout] 16 |                 profit = profit + (prices[next_index] - prices[index]);
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `profit += (prices[next_index] - prices[index])`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of an assign operation
[INFO] [stdout]   --> src/array/array_max_profit2.rs:18:13
[INFO] [stdout]    |
[INFO] [stdout] 18 |             index = index + 1;
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^ help: replace it with: `index += 1`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this boolean expression can be simplified
[INFO] [stdout]   --> src/array/array_can_jump.rs:40:16
[INFO] [stdout]    |
[INFO] [stdout] 40 |             if !jump_result.is_none() {
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^^^^^^^ help: try: `jump_result.is_some()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#nonminimal_bool
[INFO] [stdout]    = note: `#[warn(clippy::nonminimal_bool)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: called `unwrap` on `jump_result` after checking its variant with `is_none`
[INFO] [stdout]   --> src/array/array_can_jump.rs:41:24
[INFO] [stdout]    |
[INFO] [stdout] 40 |             if !jump_result.is_none() {
[INFO] [stdout]    |                 --------------------- the check is happening here
[INFO] [stdout] 41 |                 return jump_result.unwrap();
[INFO] [stdout]    |                        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: try using `match`
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_unwrap
[INFO] [stdout]    = note: `#[warn(clippy::unnecessary_unwrap)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/array/array_can_jump.rs:45:9
[INFO] [stdout]    |
[INFO] [stdout] 45 |         return false;
[INFO] [stdout]    |         ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout]    = note: `#[warn(clippy::needless_return)]` on by default
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 45 -         return false;
[INFO] [stdout] 45 +         false
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: equality checks against true are unnecessary
[INFO] [stdout]   --> src/array/array_can_jump.rs:29:20
[INFO] [stdout]    |
[INFO] [stdout] 29 |                 if jump_result.unwrap_or(false) == true {
[INFO] [stdout]    |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `jump_result.unwrap_or(false)`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#bool_comparison
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: used `assert_eq!` with a literal bool
[INFO] [stdout]   --> src/array/array_can_jump.rs:56:9
[INFO] [stdout]    |
[INFO] [stdout] 56 |         assert_eq!(Solution::can_jump(nums), true);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#bool_assert_comparison
[INFO] [stdout]    = note: `#[warn(clippy::bool_assert_comparison)]` on by default
[INFO] [stdout] help: replace it with `assert!(..)`
[INFO] [stdout]    |
[INFO] [stdout] 56 -         assert_eq!(Solution::can_jump(nums), true);
[INFO] [stdout] 56 +         assert!(Solution::can_jump(nums));
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: used `assert_eq!` with a literal bool
[INFO] [stdout]   --> src/array/array_can_jump.rs:59:9
[INFO] [stdout]    |
[INFO] [stdout] 59 |         assert_eq!(Solution::can_jump(nums), false);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#bool_assert_comparison
[INFO] [stdout] help: replace it with `assert!(..)`
[INFO] [stdout]    |
[INFO] [stdout] 59 -         assert_eq!(Solution::can_jump(nums), false);
[INFO] [stdout] 59 +         assert!(!Solution::can_jump(nums));
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: used `assert_eq!` with a literal bool
[INFO] [stdout]   --> src/array/array_can_jump.rs:62:9
[INFO] [stdout]    |
[INFO] [stdout] 62 |         assert_eq!(Solution::can_jump(nums), true);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#bool_assert_comparison
[INFO] [stdout] help: replace it with `assert!(..)`
[INFO] [stdout]    |
[INFO] [stdout] 62 -         assert_eq!(Solution::can_jump(nums), true);
[INFO] [stdout] 62 +         assert!(Solution::can_jump(nums));
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: used `assert_eq!` with a literal bool
[INFO] [stdout]   --> src/array/array_can_jump.rs:65:9
[INFO] [stdout]    |
[INFO] [stdout] 65 |         assert_eq!(Solution::can_jump(nums), true);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#bool_assert_comparison
[INFO] [stdout] help: replace it with `assert!(..)`
[INFO] [stdout]    |
[INFO] [stdout] 65 -         assert_eq!(Solution::can_jump(nums), true);
[INFO] [stdout] 65 +         assert!(Solution::can_jump(nums));
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: used `assert_eq!` with a literal bool
[INFO] [stdout]   --> src/array/array_can_jump.rs:68:9
[INFO] [stdout]    |
[INFO] [stdout] 68 |         assert_eq!(Solution::can_jump(nums), true);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#bool_assert_comparison
[INFO] [stdout] help: replace it with `assert!(..)`
[INFO] [stdout]    |
[INFO] [stdout] 68 -         assert_eq!(Solution::can_jump(nums), true);
[INFO] [stdout] 68 +         assert!(Solution::can_jump(nums));
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless use of `vec!`
[INFO] [stdout]  --> src/array/array_roman_to_int.rs:7:26
[INFO] [stdout]   |
[INFO] [stdout] 7 |         let roman_char = vec!['I', 'V', 'X', 'L', 'C','D', 'M'];
[INFO] [stdout]   |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: you can use an array directly: `['I', 'V', 'X', 'L', 'C','D', 'M']`
[INFO] [stdout]   |
[INFO] [stdout]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_vec
[INFO] [stdout]   = note: `#[warn(clippy::useless_vec)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless use of `vec!`
[INFO] [stdout]  --> src/array/array_roman_to_int.rs:8:25
[INFO] [stdout]   |
[INFO] [stdout] 8 |         let roman_int = vec![1, 5, 10, 50, 100, 500, 1000];
[INFO] [stdout]   |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: you can use an array directly: `[1, 5, 10, 50, 100, 500, 1000]`
[INFO] [stdout]   |
[INFO] [stdout]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_vec
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless use of `vec!`
[INFO] [stdout]   --> src/array/array_roman_to_int.rs:67:27
[INFO] [stdout]    |
[INFO] [stdout] 67 |         let source_strs = vec!["III", "IV", "IX", "LVIII", "MCMXCIV", "MDCCCLXXXIV", "CCCI"];
[INFO] [stdout]    |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: you can use an array directly: `["III", "IV", "IX", "LVIII", "MCMXCIV", "MDCCCLXXXIV", "CCCI"]`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_vec
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless use of `vec!`
[INFO] [stdout]   --> src/array/array_roman_to_int.rs:68:27
[INFO] [stdout]    |
[INFO] [stdout] 68 |         let goal_values = vec![3, 4, 9, 58, 1994, 1884, 301];
[INFO] [stdout]    |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: you can use an array directly: `[3, 4, 9, 58, 1994, 1884, 301]`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_vec
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 43.44s
[INFO] running `Command { std: "docker" "inspect" "81644076a8fa757ab117c12d8b55954b8b0e003214e552df098dfaedebf1d7e8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "81644076a8fa757ab117c12d8b55954b8b0e003214e552df098dfaedebf1d7e8", kill_on_drop: false }`
[INFO] [stdout] 81644076a8fa757ab117c12d8b55954b8b0e003214e552df098dfaedebf1d7e8