[INFO] cloning repository https://github.com/Yogaflre/leetcode
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Yogaflre/leetcode" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FYogaflre%2Fleetcode", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FYogaflre%2Fleetcode'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ac5e9de106638c22b6866c00a7944bb6eedfad03
[INFO] checking Yogaflre/leetcode against try#b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f for pr-76104
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FYogaflre%2Fleetcode" "/workspace/builds/worker-14/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Yogaflre/leetcode on toolchain b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Yogaflre/leetcode
[INFO] finished tweaking git repo https://github.com/Yogaflre/leetcode
[INFO] tweaked toml for git repo https://github.com/Yogaflre/leetcode written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/Yogaflre/leetcode already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fb812835c802d2fe3024d079ef1934c59cf37d342388b16d28eca6e20150e1e5
[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" "fb812835c802d2fe3024d079ef1934c59cf37d342388b16d28eca6e20150e1e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fb812835c802d2fe3024d079ef1934c59cf37d342388b16d28eca6e20150e1e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fb812835c802d2fe3024d079ef1934c59cf37d342388b16d28eca6e20150e1e5", kill_on_drop: false }`
[INFO] [stdout] fb812835c802d2fe3024d079ef1934c59cf37d342388b16d28eca6e20150e1e5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", 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] 91e32ed12fcb86aafa9ed4d1a8795400dc1e4b50d8ff14156979d2018567d244
[INFO] running `Command { std: "docker" "start" "-a" "91e32ed12fcb86aafa9ed4d1a8795400dc1e4b50d8ff14156979d2018567d244", kill_on_drop: false }`
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking getrandom v0.1.14
[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 leetcode v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> src/medium/counting_bits.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 25 | /         /**
[INFO] [stdout] 26 | |          * 找规律
[INFO] [stdout] 27 | |          * 0  1  2  3  4  5  6  7
[INFO] [stdout] 28 | |          * 0  1  1  2  1  2  2  3
[INFO] [stdout] 29 | |          * 当n/二进制整数==0时，res[n]=1，并且将除数设置为最新的二进制整数
[INFO] [stdout] 30 | |          * 否则res[n]=res[余数] + 1
[INFO] [stdout] 31 | |          */
[INFO] [stdout]    | |___________^
[INFO] [stdout] 32 |           let mut res: Vec<i32> = vec![0; num as usize + 1];
[INFO] [stdout]    |           -------------------------------------------------- rustdoc does not generate documentation for statements
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashSet`
[INFO] [stdout]   --> src/medium/merge_intervals.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 | use std::collections::HashSet;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> src/medium/counting_bits.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 25 | /         /**
[INFO] [stdout] 26 | |          * 找规律
[INFO] [stdout] 27 | |          * 0  1  2  3  4  5  6  7
[INFO] [stdout] 28 | |          * 0  1  1  2  1  2  2  3
[INFO] [stdout] 29 | |          * 当n/二进制整数==0时，res[n]=1，并且将除数设置为最新的二进制整数
[INFO] [stdout] 30 | |          * 否则res[n]=res[余数] + 1
[INFO] [stdout] 31 | |          */
[INFO] [stdout]    | |___________^
[INFO] [stdout] 32 |           let mut res: Vec<i32> = vec![0; num as usize + 1];
[INFO] [stdout]    |           -------------------------------------------------- rustdoc does not generate documentation for statements
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashSet`
[INFO] [stdout]   --> src/medium/merge_intervals.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 | use std::collections::HashSet;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/base/bit_map.rs:76:23
[INFO] [stdout]    |
[INFO] [stdout] 76 |     fn set(&mut self, n: usize) {}
[INFO] [stdout]    |                       ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/base/bit_map.rs:78:19
[INFO] [stdout]    |
[INFO] [stdout] 78 |     fn get(&self, n: usize) -> bool {
[INFO] [stdout]    |                   ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `nums`
[INFO] [stdout]    --> src/base/heap.rs:112:13
[INFO] [stdout]     |
[INFO] [stdout] 112 |     fn topN(nums: Vec<i32>, n: usize) -> Vec<i32> {
[INFO] [stdout]     |             ^^^^ help: if this is intentional, prefix it with an underscore: `_nums`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]    --> src/base/heap.rs:112:29
[INFO] [stdout]     |
[INFO] [stdout] 112 |     fn topN(nums: Vec<i32>, n: usize) -> Vec<i32> {
[INFO] [stdout]     |                             ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `nums`
[INFO] [stdout]    --> src/base/heap.rs:117:17
[INFO] [stdout]     |
[INFO] [stdout] 117 |     fn find_mid(nums: Vec<i32>) -> i32 {
[INFO] [stdout]     |                 ^^^^ help: if this is intentional, prefix it with an underscore: `_nums`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `pre` is assigned to, but never used
[INFO] [stdout]   --> src/base/list_node.rs:51:13
[INFO] [stdout]    |
[INFO] [stdout] 51 |         let mut pre: &mut Option<Box<DoubleListNode>> = &mut None;
[INFO] [stdout]    |             ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_pre` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `pre` is never read
[INFO] [stdout]   --> src/base/list_node.rs:58:13
[INFO] [stdout]    |
[INFO] [stdout] 58 |             pre = temp;
[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: unused variable: `mains`
[INFO] [stdout]    --> src/base/matchs.rs:107:16
[INFO] [stdout]     |
[INFO] [stdout] 107 | fn good_suffix(mains: &Vec<char>, aims: &Vec<char>, i: usize, j: usize) -> usize {
[INFO] [stdout]     |                ^^^^^ help: if this is intentional, prefix it with an underscore: `_mains`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `aims`
[INFO] [stdout]    --> src/base/matchs.rs:107:35
[INFO] [stdout]     |
[INFO] [stdout] 107 | fn good_suffix(mains: &Vec<char>, aims: &Vec<char>, i: usize, j: usize) -> usize {
[INFO] [stdout]     |                                   ^^^^ help: if this is intentional, prefix it with an underscore: `_aims`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/base/matchs.rs:107:53
[INFO] [stdout]     |
[INFO] [stdout] 107 | fn good_suffix(mains: &Vec<char>, aims: &Vec<char>, i: usize, j: usize) -> usize {
[INFO] [stdout]     |                                                     ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `j`
[INFO] [stdout]    --> src/base/matchs.rs:107:63
[INFO] [stdout]     |
[INFO] [stdout] 107 | fn good_suffix(mains: &Vec<char>, aims: &Vec<char>, i: usize, j: usize) -> usize {
[INFO] [stdout]     |                                                               ^ help: if this is intentional, prefix it with an underscore: `_j`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]    --> src/base/matchs.rs:118:8
[INFO] [stdout]     |
[INFO] [stdout] 118 | fn kmp(a: &str, b: &str) -> bool {
[INFO] [stdout]     |        ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]    --> src/base/matchs.rs:118:17
[INFO] [stdout]     |
[INFO] [stdout] 118 | fn kmp(a: &str, b: &str) -> bool {
[INFO] [stdout]     |                 ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `nodes`
[INFO] [stdout]   --> src/base/tree_node.rs:32:19
[INFO] [stdout]    |
[INFO] [stdout] 32 |     pub fn create(nodes: Vec<i32>) -> Option<Rc<RefCell<TreeNode>>> {
[INFO] [stdout]    |                   ^^^^^ help: if this is intentional, prefix it with an underscore: `_nodes`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `heights`
[INFO] [stdout]   --> src/hard/largest_rectangle_in_histogram.rs:18:35
[INFO] [stdout]    |
[INFO] [stdout] 18 |     pub fn largest_rectangle_area(heights: Vec<i32>) -> i32 {
[INFO] [stdout]    |                                   ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_heights`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `l` is never read
[INFO] [stdout]   --> src/hard/maximal_rectangle.rs:51:13
[INFO] [stdout]    |
[INFO] [stdout] 51 |         let mut l = i;
[INFO] [stdout]    |             ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tmp`
[INFO] [stdout]   --> src/hard/maximal_rectangle.rs:56:21
[INFO] [stdout]    |
[INFO] [stdout] 56 |                 let mut tmp = j;
[INFO] [stdout]    |                     ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_tmp`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `metrix`
[INFO] [stdout]   --> src/medium/course_schedule.rs:75:13
[INFO] [stdout]    |
[INFO] [stdout] 75 |         let metrix: Vec<Vec<i32>> = vec![vec![0; num_courses as usize]; num_courses as usize];
[INFO] [stdout]    |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_metrix`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `prerequisites`
[INFO] [stdout]   --> src/medium/course_schedule.rs:73:42
[INFO] [stdout]    |
[INFO] [stdout] 73 |     pub fn can_finish2(num_courses: i32, prerequisites: Vec<Vec<i32>>) -> bool {
[INFO] [stdout]    |                                          ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_prerequisites`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot borrow `count_table` as mutable because it is also borrowed as immutable
[INFO] [stdout]   --> src/base/huffman_coding.rs:12:24
[INFO] [stdout]    |
[INFO] [stdout] 11 |         match count_table.get(&i) {
[INFO] [stdout]    |               ----------- immutable borrow occurs here
[INFO] [stdout] 12 |             Some(n) => count_table.insert(i, n + 1),
[INFO] [stdout]    |                        ^^^^^^^^^^^           - immutable borrow later used here
[INFO] [stdout]    |                        |
[INFO] [stdout]    |                        mutable borrow occurs here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[deny(mutable_borrow_reservation_conflict)]` on by default
[INFO] [stdout]    = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stdout]    = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/base/sort_algo.rs:87:10
[INFO] [stdout]    |
[INFO] [stdout] 87 | fn merge(mut nums: Vec<i32>) -> Vec<i32> {
[INFO] [stdout]    |          ----^^^^
[INFO] [stdout]    |          |
[INFO] [stdout]    |          help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/easy/reverse_linked_list.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |         mut pre: Option<Box<ListNode>>,
[INFO] [stdout]    |         ----^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/hard/maximal_rectangle.rs:56:21
[INFO] [stdout]    |
[INFO] [stdout] 56 |                 let mut tmp = j;
[INFO] [stdout]    |                     ----^^^
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/hard/regular_expression_matching.rs:59:27
[INFO] [stdout]    |
[INFO] [stdout] 59 |     fn rmatch(s: &[char], mut si: usize, p: &[char], mut pi: usize) -> bool {
[INFO] [stdout]    |                           ----^^
[INFO] [stdout]    |                           |
[INFO] [stdout]    |                           help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/hard/regular_expression_matching.rs:59:54
[INFO] [stdout]    |
[INFO] [stdout] 59 |     fn rmatch(s: &[char], mut si: usize, p: &[char], mut pi: usize) -> bool {
[INFO] [stdout]    |                                                      ----^^
[INFO] [stdout]    |                                                      |
[INFO] [stdout]    |                                                      help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 26 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `leetcode`
[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 variable: `n`
[INFO] [stdout]   --> src/base/bit_map.rs:76:23
[INFO] [stdout]    |
[INFO] [stdout] 76 |     fn set(&mut self, n: usize) {}
[INFO] [stdout]    |                       ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/base/bit_map.rs:78:19
[INFO] [stdout]    |
[INFO] [stdout] 78 |     fn get(&self, n: usize) -> bool {
[INFO] [stdout]    |                   ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `nums`
[INFO] [stdout]    --> src/base/heap.rs:112:13
[INFO] [stdout]     |
[INFO] [stdout] 112 |     fn topN(nums: Vec<i32>, n: usize) -> Vec<i32> {
[INFO] [stdout]     |             ^^^^ help: if this is intentional, prefix it with an underscore: `_nums`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]    --> src/base/heap.rs:112:29
[INFO] [stdout]     |
[INFO] [stdout] 112 |     fn topN(nums: Vec<i32>, n: usize) -> Vec<i32> {
[INFO] [stdout]     |                             ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `nums`
[INFO] [stdout]    --> src/base/heap.rs:117:17
[INFO] [stdout]     |
[INFO] [stdout] 117 |     fn find_mid(nums: Vec<i32>) -> i32 {
[INFO] [stdout]     |                 ^^^^ help: if this is intentional, prefix it with an underscore: `_nums`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `pre` is assigned to, but never used
[INFO] [stdout]   --> src/base/list_node.rs:51:13
[INFO] [stdout]    |
[INFO] [stdout] 51 |         let mut pre: &mut Option<Box<DoubleListNode>> = &mut None;
[INFO] [stdout]    |             ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_pre` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `pre` is never read
[INFO] [stdout]   --> src/base/list_node.rs:58:13
[INFO] [stdout]    |
[INFO] [stdout] 58 |             pre = temp;
[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: unused variable: `mains`
[INFO] [stdout]    --> src/base/matchs.rs:107:16
[INFO] [stdout]     |
[INFO] [stdout] 107 | fn good_suffix(mains: &Vec<char>, aims: &Vec<char>, i: usize, j: usize) -> usize {
[INFO] [stdout]     |                ^^^^^ help: if this is intentional, prefix it with an underscore: `_mains`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `aims`
[INFO] [stdout]    --> src/base/matchs.rs:107:35
[INFO] [stdout]     |
[INFO] [stdout] 107 | fn good_suffix(mains: &Vec<char>, aims: &Vec<char>, i: usize, j: usize) -> usize {
[INFO] [stdout]     |                                   ^^^^ help: if this is intentional, prefix it with an underscore: `_aims`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/base/matchs.rs:107:53
[INFO] [stdout]     |
[INFO] [stdout] 107 | fn good_suffix(mains: &Vec<char>, aims: &Vec<char>, i: usize, j: usize) -> usize {
[INFO] [stdout]     |                                                     ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `j`
[INFO] [stdout]    --> src/base/matchs.rs:107:63
[INFO] [stdout]     |
[INFO] [stdout] 107 | fn good_suffix(mains: &Vec<char>, aims: &Vec<char>, i: usize, j: usize) -> usize {
[INFO] [stdout]     |                                                               ^ help: if this is intentional, prefix it with an underscore: `_j`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]    --> src/base/matchs.rs:118:8
[INFO] [stdout]     |
[INFO] [stdout] 118 | fn kmp(a: &str, b: &str) -> bool {
[INFO] [stdout]     |        ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]    --> src/base/matchs.rs:118:17
[INFO] [stdout]     |
[INFO] [stdout] 118 | fn kmp(a: &str, b: &str) -> bool {
[INFO] [stdout]     |                 ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `nodes`
[INFO] [stdout]   --> src/base/tree_node.rs:32:19
[INFO] [stdout]    |
[INFO] [stdout] 32 |     pub fn create(nodes: Vec<i32>) -> Option<Rc<RefCell<TreeNode>>> {
[INFO] [stdout]    |                   ^^^^^ help: if this is intentional, prefix it with an underscore: `_nodes`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `heights`
[INFO] [stdout]   --> src/hard/largest_rectangle_in_histogram.rs:18:35
[INFO] [stdout]    |
[INFO] [stdout] 18 |     pub fn largest_rectangle_area(heights: Vec<i32>) -> i32 {
[INFO] [stdout]    |                                   ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_heights`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `l` is never read
[INFO] [stdout]   --> src/hard/maximal_rectangle.rs:51:13
[INFO] [stdout]    |
[INFO] [stdout] 51 |         let mut l = i;
[INFO] [stdout]    |             ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tmp`
[INFO] [stdout]   --> src/hard/maximal_rectangle.rs:56:21
[INFO] [stdout]    |
[INFO] [stdout] 56 |                 let mut tmp = j;
[INFO] [stdout]    |                     ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_tmp`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `metrix`
[INFO] [stdout]   --> src/medium/course_schedule.rs:75:13
[INFO] [stdout]    |
[INFO] [stdout] 75 |         let metrix: Vec<Vec<i32>> = vec![vec![0; num_courses as usize]; num_courses as usize];
[INFO] [stdout]    |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_metrix`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `prerequisites`
[INFO] [stdout]   --> src/medium/course_schedule.rs:73:42
[INFO] [stdout]    |
[INFO] [stdout] 73 |     pub fn can_finish2(num_courses: i32, prerequisites: Vec<Vec<i32>>) -> bool {
[INFO] [stdout]    |                                          ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_prerequisites`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot borrow `count_table` as mutable because it is also borrowed as immutable
[INFO] [stdout]   --> src/base/huffman_coding.rs:12:24
[INFO] [stdout]    |
[INFO] [stdout] 11 |         match count_table.get(&i) {
[INFO] [stdout]    |               ----------- immutable borrow occurs here
[INFO] [stdout] 12 |             Some(n) => count_table.insert(i, n + 1),
[INFO] [stdout]    |                        ^^^^^^^^^^^           - immutable borrow later used here
[INFO] [stdout]    |                        |
[INFO] [stdout]    |                        mutable borrow occurs here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[deny(mutable_borrow_reservation_conflict)]` on by default
[INFO] [stdout]    = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stdout]    = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/base/sort_algo.rs:87:10
[INFO] [stdout]    |
[INFO] [stdout] 87 | fn merge(mut nums: Vec<i32>) -> Vec<i32> {
[INFO] [stdout]    |          ----^^^^
[INFO] [stdout]    |          |
[INFO] [stdout]    |          help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/easy/reverse_linked_list.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |         mut pre: Option<Box<ListNode>>,
[INFO] [stdout]    |         ----^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/hard/maximal_rectangle.rs:56:21
[INFO] [stdout]    |
[INFO] [stdout] 56 |                 let mut tmp = j;
[INFO] [stdout]    |                     ----^^^
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/hard/regular_expression_matching.rs:59:27
[INFO] [stdout]    |
[INFO] [stdout] 59 |     fn rmatch(s: &[char], mut si: usize, p: &[char], mut pi: usize) -> bool {
[INFO] [stdout]    |                           ----^^
[INFO] [stdout]    |                           |
[INFO] [stdout]    |                           help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/hard/regular_expression_matching.rs:59:54
[INFO] [stdout]    |
[INFO] [stdout] 59 |     fn rmatch(s: &[char], mut si: usize, p: &[char], mut pi: usize) -> bool {
[INFO] [stdout]    |                                                      ----^^
[INFO] [stdout]    |                                                      |
[INFO] [stdout]    |                                                      help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 26 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "91e32ed12fcb86aafa9ed4d1a8795400dc1e4b50d8ff14156979d2018567d244", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "91e32ed12fcb86aafa9ed4d1a8795400dc1e4b50d8ff14156979d2018567d244", kill_on_drop: false }`
[INFO] [stdout] 91e32ed12fcb86aafa9ed4d1a8795400dc1e4b50d8ff14156979d2018567d244