[INFO] cloning repository https://github.com/cbbfcd/fuck-leetcode
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/cbbfcd/fuck-leetcode" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcbbfcd%2Ffuck-leetcode", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcbbfcd%2Ffuck-leetcode'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a13b0586be03daed9952c53f7b036f8eeef2d63f
[INFO] linting cbbfcd/fuck-leetcode against nightly for clippy-nonminimal_bool-denied
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcbbfcd%2Ffuck-leetcode" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/cbbfcd/fuck-leetcode
[INFO] finished tweaking git repo https://github.com/cbbfcd/fuck-leetcode
[INFO] tweaked toml for git repo https://github.com/cbbfcd/fuck-leetcode written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/cbbfcd/fuck-leetcode 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/cbbfcd/fuck-leetcode already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+nightly" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded leetcode_test v0.1.2
[INFO] [stderr]   Downloaded leetcode_prelude v0.2.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 4878173e5e0b84f34d8c66fe16ba3e54fd0c5cd661b9e14842adf2958a80e6d4
[INFO] running `Command { std: "docker" "start" "-a" "4878173e5e0b84f34d8c66fe16ba3e54fd0c5cd661b9e14842adf2958a80e6d4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4878173e5e0b84f34d8c66fe16ba3e54fd0c5cd661b9e14842adf2958a80e6d4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4878173e5e0b84f34d8c66fe16ba3e54fd0c5cd661b9e14842adf2958a80e6d4", kill_on_drop: false }`
[INFO] [stdout] 4878173e5e0b84f34d8c66fe16ba3e54fd0c5cd661b9e14842adf2958a80e6d4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] bff21e4cae9abd7e52b18cc31f723a706ab6b1b06db5e4b14306f85d0304a7e8
[INFO] running `Command { std: "docker" "start" "-a" "bff21e4cae9abd7e52b18cc31f723a706ab6b1b06db5e4b14306f85d0304a7e8", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]     Checking rand_core v0.4.2
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling serde v1.0.126
[INFO] [stderr]    Compiling libc v0.2.95
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]    Compiling itoa v0.4.7
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]     Checking rand_jitter v0.1.4
[INFO] [stderr]     Checking rand_xorshift v0.1.1
[INFO] [stderr]     Checking rand_hc v0.1.0
[INFO] [stderr]     Checking rand_isaac v0.1.1
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]    Compiling leetcode_test v0.1.2
[INFO] [stderr]     Checking leetcode_prelude v0.2.3
[INFO] [stderr]     Checking fuck-leetcode v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `a` and `b` are never read
[INFO] [stdout]  --> src/two_stack_2_queue.rs:4:3
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct CQueue {
[INFO] [stdout]   |            ------ fields in this struct
[INFO] [stdout] 4 |   a: Vec<i32>,
[INFO] [stdout]   |   ^
[INFO] [stdout] 5 |   b: Vec<i32>
[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 items `new`, `append_tail`, and `delete_head` are never used
[INFO] [stdout]   --> src/two_stack_2_queue.rs:13:6
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl CQueue {
[INFO] [stdout]    | ----------- associated items in this implementation
[INFO] [stdout] 13 |   fn new() -> Self {
[INFO] [stdout]    |      ^^^
[INFO] [stdout] ...
[INFO] [stdout] 19 |   fn append_tail(&mut self, value: i32) {
[INFO] [stdout]    |      ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 22 |   fn delete_head(&mut self) -> i32 {
[INFO] [stdout]    |      ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the loop variable `i` is only used to index `nums`
[INFO] [stdout]   --> src/find_repeat_number.rs:38:12
[INFO] [stdout]    |
[INFO] [stdout] 38 |         for i in 0..nums.len() {
[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] 38 -         for i in 0..nums.len() {
[INFO] [stdout] 38 +         for <item> in &nums {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the loop variable `i` is only used to index `matrix`
[INFO] [stdout]   --> src/find_number_in2_d_array.rs:21:14
[INFO] [stdout]    |
[INFO] [stdout] 21 |     for i in 0..matrix.len() {
[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] 21 -     for i in 0..matrix.len() {
[INFO] [stdout] 21 +     for <item> in &matrix {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the loop variable `j` is only used to index `matrix`
[INFO] [stdout]   --> src/find_number_in2_d_array.rs:22:16
[INFO] [stdout]    |
[INFO] [stdout] 22 |       for j in 0..matrix[i].len() {
[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] 22 -       for j in 0..matrix[i].len() {
[INFO] [stdout] 22 +       for <item> in matrix.iter().take(matrix[i].len()) {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the loop variable `j` is only used to index `matrix`
[INFO] [stdout]   --> src/find_number_in2_d_array.rs:36:14
[INFO] [stdout]    |
[INFO] [stdout] 36 |     for j in 0..matrix.len() {
[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] 36 -     for j in 0..matrix.len() {
[INFO] [stdout] 36 +     for <item> in &matrix {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the loop variable `i` is only used to index `new_vec`
[INFO] [stdout]   --> src/find_number_in2_d_array.rs:40:14
[INFO] [stdout]    |
[INFO] [stdout] 40 |     for i in 0..new_vec.len() {
[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] 40 -     for i in 0..new_vec.len() {
[INFO] [stdout] 40 +     for <item> in &new_vec {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: length comparison to zero
[INFO] [stdout]   --> src/find_number_in2_d_array.rs:60:8
[INFO] [stdout]    |
[INFO] [stdout] 60 |     if matrix.len() == 0 || matrix[0].len() == 0 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `matrix.is_empty()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stdout]    = note: `#[warn(clippy::len_zero)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: length comparison to zero
[INFO] [stdout]   --> src/find_number_in2_d_array.rs:60:29
[INFO] [stdout]    |
[INFO] [stdout] 60 |     if matrix.len() == 0 || matrix[0].len() == 0 {
[INFO] [stdout]    |                             ^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `matrix[0].is_empty()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/replace_space.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     return s.replace(" ", "%20");
[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] 10 -     return s.replace(" ", "%20");
[INFO] [stdout] 10 +     s.replace(" ", "%20")
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this boolean expression can be simplified
[INFO] [stdout]   --> src/inorder_traversal.rs:60:13
[INFO] [stdout]    |
[INFO] [stdout] 60 |       while !root.is_none() || stack.len() != 0 {
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^ help: try: `root.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: this boolean expression can be simplified
[INFO] [stdout]   --> src/inorder_traversal.rs:61:15
[INFO] [stdout]    |
[INFO] [stdout] 61 |         while !root.is_none() {
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^ help: try: `root.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] 
[INFO] [stdout] 
[INFO] [stdout] warning: length comparison to zero
[INFO] [stdout]   --> src/inorder_traversal.rs:60:32
[INFO] [stdout]    |
[INFO] [stdout] 60 |       while !root.is_none() || stack.len() != 0 {
[INFO] [stdout]    |                                ^^^^^^^^^^^^^^^^ help: using `!is_empty` is clearer and more explicit: `!stack.is_empty()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/two_stack_2_queue.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | /     return CQueue {
[INFO] [stdout] 15 | |       a: Vec::new(),
[INFO] [stdout] 16 | |       b: Vec::new()
[INFO] [stdout] 17 | |     }
[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] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 14 ~     CQueue {
[INFO] [stdout] 15 +       a: Vec::new(),
[INFO] [stdout] 16 +       b: Vec::new()
[INFO] [stdout] 17 +     }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/two_stack_2_queue.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 29 |     return self.b.pop().unwrap_or(-1);
[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] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 29 -     return self.b.pop().unwrap_or(-1);
[INFO] [stdout] 29 +     self.b.pop().unwrap_or(-1)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: empty line after doc comment
[INFO] [stdout]   --> src/two_stack_2_queue.rs:33:1
[INFO] [stdout]    |
[INFO] [stdout] 33 | / /**
[INFO] [stdout] 34 | |  * Your CQueue object will be instantiated and called as such:
[INFO] [stdout] 35 | |  * let obj = CQueue::new();
[INFO] [stdout] 36 | |  * obj.append_tail(value);
[INFO] [stdout] 37 | |  * let ret_2: i32 = obj.delete_head();
[INFO] [stdout] 38 | |  */
[INFO] [stdout] 39 | |
[INFO] [stdout]    | |_^
[INFO] [stdout] 40 |   #[cfg(test)]
[INFO] [stdout] 41 |   mod test {
[INFO] [stdout]    |   -------- the comment documents this module
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#empty_line_after_doc_comments
[INFO] [stdout]    = note: `#[warn(clippy::empty_line_after_doc_comments)]` on by default
[INFO] [stdout]    = help: if the empty line is unintentional, remove it
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the loop variable `i` is only used to index `nums`
[INFO] [stdout]   --> src/find_repeat_number.rs:38:12
[INFO] [stdout]    |
[INFO] [stdout] 38 |         for i in 0..nums.len() {
[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] 38 -         for i in 0..nums.len() {
[INFO] [stdout] 38 +         for <item> in &nums {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the loop variable `i` is only used to index `matrix`
[INFO] [stdout]   --> src/find_number_in2_d_array.rs:21:14
[INFO] [stdout]    |
[INFO] [stdout] 21 |     for i in 0..matrix.len() {
[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] 21 -     for i in 0..matrix.len() {
[INFO] [stdout] 21 +     for <item> in &matrix {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the loop variable `j` is only used to index `matrix`
[INFO] [stdout]   --> src/find_number_in2_d_array.rs:22:16
[INFO] [stdout]    |
[INFO] [stdout] 22 |       for j in 0..matrix[i].len() {
[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] 22 -       for j in 0..matrix[i].len() {
[INFO] [stdout] 22 +       for <item> in matrix.iter().take(matrix[i].len()) {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the loop variable `j` is only used to index `matrix`
[INFO] [stdout]   --> src/find_number_in2_d_array.rs:36:14
[INFO] [stdout]    |
[INFO] [stdout] 36 |     for j in 0..matrix.len() {
[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] 36 -     for j in 0..matrix.len() {
[INFO] [stdout] 36 +     for <item> in &matrix {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the loop variable `i` is only used to index `new_vec`
[INFO] [stdout]   --> src/find_number_in2_d_array.rs:40:14
[INFO] [stdout]    |
[INFO] [stdout] 40 |     for i in 0..new_vec.len() {
[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] 40 -     for i in 0..new_vec.len() {
[INFO] [stdout] 40 +     for <item> in &new_vec {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: length comparison to zero
[INFO] [stdout]   --> src/find_number_in2_d_array.rs:60:8
[INFO] [stdout]    |
[INFO] [stdout] 60 |     if matrix.len() == 0 || matrix[0].len() == 0 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `matrix.is_empty()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stdout]    = note: `#[warn(clippy::len_zero)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: length comparison to zero
[INFO] [stdout]   --> src/find_number_in2_d_array.rs:60:29
[INFO] [stdout]    |
[INFO] [stdout] 60 |     if matrix.len() == 0 || matrix[0].len() == 0 {
[INFO] [stdout]    |                             ^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `matrix[0].is_empty()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: used `assert_eq!` with a literal bool
[INFO] [stdout]   --> src/find_number_in2_d_array.rs:91:5
[INFO] [stdout]    |
[INFO] [stdout] 91 |     assert_eq!(Solution::find_number_in2_d_array(matrix.clone(), 5), 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] 91 -     assert_eq!(Solution::find_number_in2_d_array(matrix.clone(), 5), true);
[INFO] [stdout] 91 +     assert!(Solution::find_number_in2_d_array(matrix.clone(), 5));
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: used `assert_eq!` with a literal bool
[INFO] [stdout]   --> src/find_number_in2_d_array.rs:92:5
[INFO] [stdout]    |
[INFO] [stdout] 92 |     assert_eq!(Solution::find_number_in2_d_array(matrix.clone(), 20), 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] 92 -     assert_eq!(Solution::find_number_in2_d_array(matrix.clone(), 20), false);
[INFO] [stdout] 92 +     assert!(!Solution::find_number_in2_d_array(matrix.clone(), 20));
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: used `assert_eq!` with a literal bool
[INFO] [stdout]   --> src/find_number_in2_d_array.rs:93:5
[INFO] [stdout]    |
[INFO] [stdout] 93 |     assert_eq!(Solution::find_number_in2_d_array_01(matrix.clone(), 5), 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] 93 -     assert_eq!(Solution::find_number_in2_d_array_01(matrix.clone(), 5), true);
[INFO] [stdout] 93 +     assert!(Solution::find_number_in2_d_array_01(matrix.clone(), 5));
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: used `assert_eq!` with a literal bool
[INFO] [stdout]   --> src/find_number_in2_d_array.rs:94:5
[INFO] [stdout]    |
[INFO] [stdout] 94 |     assert_eq!(Solution::find_number_in2_d_array_01(matrix.clone(), 20), 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] 94 -     assert_eq!(Solution::find_number_in2_d_array_01(matrix.clone(), 20), false);
[INFO] [stdout] 94 +     assert!(!Solution::find_number_in2_d_array_01(matrix.clone(), 20));
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: used `assert_eq!` with a literal bool
[INFO] [stdout]   --> src/find_number_in2_d_array.rs:95:5
[INFO] [stdout]    |
[INFO] [stdout] 95 |     assert_eq!(Solution::find_number_in2_d_array_02(matrix.clone(), 5), 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] 95 -     assert_eq!(Solution::find_number_in2_d_array_02(matrix.clone(), 5), true);
[INFO] [stdout] 95 +     assert!(Solution::find_number_in2_d_array_02(matrix.clone(), 5));
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: used `assert_eq!` with a literal bool
[INFO] [stdout]   --> src/find_number_in2_d_array.rs:96:5
[INFO] [stdout]    |
[INFO] [stdout] 96 |     assert_eq!(Solution::find_number_in2_d_array_02(matrix.clone(), 20), 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] 96 -     assert_eq!(Solution::find_number_in2_d_array_02(matrix.clone(), 20), false);
[INFO] [stdout] 96 +     assert!(!Solution::find_number_in2_d_array_02(matrix.clone(), 20));
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: used `assert_eq!` with a literal bool
[INFO] [stdout]   --> src/find_number_in2_d_array.rs:97:5
[INFO] [stdout]    |
[INFO] [stdout] 97 |     assert_eq!(Solution::find_number_in2_d_array_02(vec![vec![-5]], -5), 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] 97 -     assert_eq!(Solution::find_number_in2_d_array_02(vec![vec![-5]], -5), true);
[INFO] [stdout] 97 +     assert!(Solution::find_number_in2_d_array_02(vec![vec![-5]], -5));
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/replace_space.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     return s.replace(" ", "%20");
[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] 10 -     return s.replace(" ", "%20");
[INFO] [stdout] 10 +     s.replace(" ", "%20")
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this boolean expression can be simplified
[INFO] [stdout]   --> src/inorder_traversal.rs:60:13
[INFO] [stdout]    |
[INFO] [stdout] 60 |       while !root.is_none() || stack.len() != 0 {
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^ help: try: `root.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: this boolean expression can be simplified
[INFO] [stdout]   --> src/inorder_traversal.rs:61:15
[INFO] [stdout]    |
[INFO] [stdout] 61 |         while !root.is_none() {
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^ help: try: `root.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] 
[INFO] [stdout] 
[INFO] [stdout] warning: length comparison to zero
[INFO] [stdout]   --> src/inorder_traversal.rs:60:32
[INFO] [stdout]    |
[INFO] [stdout] 60 |       while !root.is_none() || stack.len() != 0 {
[INFO] [stdout]    |                                ^^^^^^^^^^^^^^^^ help: using `!is_empty` is clearer and more explicit: `!stack.is_empty()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/two_stack_2_queue.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | /     return CQueue {
[INFO] [stdout] 15 | |       a: Vec::new(),
[INFO] [stdout] 16 | |       b: Vec::new()
[INFO] [stdout] 17 | |     }
[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] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 14 ~     CQueue {
[INFO] [stdout] 15 +       a: Vec::new(),
[INFO] [stdout] 16 +       b: Vec::new()
[INFO] [stdout] 17 +     }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/two_stack_2_queue.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 29 |     return self.b.pop().unwrap_or(-1);
[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] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 29 -     return self.b.pop().unwrap_or(-1);
[INFO] [stdout] 29 +     self.b.pop().unwrap_or(-1)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.24s
[INFO] running `Command { std: "docker" "inspect" "bff21e4cae9abd7e52b18cc31f723a706ab6b1b06db5e4b14306f85d0304a7e8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bff21e4cae9abd7e52b18cc31f723a706ab6b1b06db5e4b14306f85d0304a7e8", kill_on_drop: false }`
[INFO] [stdout] bff21e4cae9abd7e52b18cc31f723a706ab6b1b06db5e4b14306f85d0304a7e8