[INFO] cloning repository https://github.com/rayz-z/merkle_tree
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/rayz-z/merkle_tree" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frayz-z%2Fmerkle_tree", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frayz-z%2Fmerkle_tree'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 84c431a7392a8cb4882f439dcdefb7d25d6f5a8a
[INFO] linting rayz-z/merkle_tree against nightly for clippy-nonminimal_bool-denied
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frayz-z%2Fmerkle_tree" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/rayz-z/merkle_tree
[INFO] finished tweaking git repo https://github.com/rayz-z/merkle_tree
[INFO] tweaked toml for git repo https://github.com/rayz-z/merkle_tree written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/rayz-z/merkle_tree 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/rayz-z/merkle_tree 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]  Downloading crates ...
[INFO] [stderr]   Downloaded cfg-if v1.0.1
[INFO] [stderr]   Downloaded zerocopy-derive v0.8.26
[INFO] [stderr]   Downloaded bitflags v2.9.1
[INFO] [stderr]   Downloaded zerocopy v0.8.26
[INFO] [stderr]   Downloaded libc v0.2.174
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 73d3d7a8825526e72f7b6f3ed870a8077e9794cfdd8afba6c1dd11de77b850ad
[INFO] running `Command { std: "docker" "start" "-a" "73d3d7a8825526e72f7b6f3ed870a8077e9794cfdd8afba6c1dd11de77b850ad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "73d3d7a8825526e72f7b6f3ed870a8077e9794cfdd8afba6c1dd11de77b850ad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "73d3d7a8825526e72f7b6f3ed870a8077e9794cfdd8afba6c1dd11de77b850ad", kill_on_drop: false }`
[INFO] [stdout] 73d3d7a8825526e72f7b6f3ed870a8077e9794cfdd8afba6c1dd11de77b850ad
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 1f427e08c0f06636974ad56bc91b9006d2a548f6dee50f57281e8fb39bcbc4d5
[INFO] running `Command { std: "docker" "start" "-a" "1f427e08c0f06636974ad56bc91b9006d2a548f6dee50f57281e8fb39bcbc4d5", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.174
[INFO] [stderr]    Compiling zerocopy v0.8.26
[INFO] [stderr]     Checking cfg-if v1.0.1
[INFO] [stderr]     Checking digest v0.10.7
[INFO] [stderr]     Checking sha2 v0.10.9
[INFO] [stderr]     Checking getrandom v0.3.3
[INFO] [stderr]     Checking rand_core v0.9.3
[INFO] [stderr]     Checking ppv-lite86 v0.2.21
[INFO] [stderr]     Checking rand_chacha v0.9.0
[INFO] [stderr]     Checking rand v0.9.2
[INFO] [stderr]     Checking merkle_tree v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: this import is redundant
[INFO] [stdout]  --> src/lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | use hex;
[INFO] [stdout]   | ^^^^^^^^ help: remove it entirely
[INFO] [stdout]   |
[INFO] [stdout]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_component_path_imports
[INFO] [stdout]   = note: `#[warn(clippy::single_component_path_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the type of the `self` parameter does not need to be arbitrary
[INFO] [stdout]   --> src/lib.rs:31:20
[INFO] [stdout]    |
[INFO] [stdout] 31 |     pub fn display(self: &Self) -> Result<(), Box<dyn Error>> {
[INFO] [stdout]    |                    ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_arbitrary_self_type
[INFO] [stdout]    = note: `#[warn(clippy::needless_arbitrary_self_type)]` on by default
[INFO] [stdout] help: remove the type
[INFO] [stdout]    |
[INFO] [stdout] 31 -     pub fn display(self: &Self) -> Result<(), Box<dyn Error>> {
[INFO] [stdout] 31 +     pub fn display(&self) -> Result<(), Box<dyn Error>> {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the type of the `self` parameter does not need to be arbitrary
[INFO] [stdout]   --> src/lib.rs:84:37
[INFO] [stdout]    |
[INFO] [stdout] 84 |     pub fn search_for_node_at_index(self: &Self, index: usize) -> Option<Node> {
[INFO] [stdout]    |                                     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_arbitrary_self_type
[INFO] [stdout] help: remove the type
[INFO] [stdout]    |
[INFO] [stdout] 84 -     pub fn search_for_node_at_index(self: &Self, index: usize) -> Option<Node> {
[INFO] [stdout] 84 +     pub fn search_for_node_at_index(&self, index: usize) -> Option<Node> {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the type of the `self` parameter does not need to be arbitrary
[INFO] [stdout]   --> src/lib.rs:94:20
[INFO] [stdout]    |
[INFO] [stdout] 94 |     pub fn display(self: &Self) {
[INFO] [stdout]    |                    ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_arbitrary_self_type
[INFO] [stdout] help: remove the type
[INFO] [stdout]    |
[INFO] [stdout] 94 -     pub fn display(self: &Self) {
[INFO] [stdout] 94 +     pub fn display(&self) {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this import is redundant
[INFO] [stdout]  --> src/lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | use hex;
[INFO] [stdout]   | ^^^^^^^^ help: remove it entirely
[INFO] [stdout]   |
[INFO] [stdout]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_component_path_imports
[INFO] [stdout]   = note: `#[warn(clippy::single_component_path_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the type of the `self` parameter does not need to be arbitrary
[INFO] [stdout]   --> src/lib.rs:31:20
[INFO] [stdout]    |
[INFO] [stdout] 31 |     pub fn display(self: &Self) -> Result<(), Box<dyn Error>> {
[INFO] [stdout]    |                    ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_arbitrary_self_type
[INFO] [stdout]    = note: `#[warn(clippy::needless_arbitrary_self_type)]` on by default
[INFO] [stdout] help: remove the type
[INFO] [stdout]    |
[INFO] [stdout] 31 -     pub fn display(self: &Self) -> Result<(), Box<dyn Error>> {
[INFO] [stdout] 31 +     pub fn display(&self) -> Result<(), Box<dyn Error>> {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the type of the `self` parameter does not need to be arbitrary
[INFO] [stdout]   --> src/lib.rs:84:37
[INFO] [stdout]    |
[INFO] [stdout] 84 |     pub fn search_for_node_at_index(self: &Self, index: usize) -> Option<Node> {
[INFO] [stdout]    |                                     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_arbitrary_self_type
[INFO] [stdout] help: remove the type
[INFO] [stdout]    |
[INFO] [stdout] 84 -     pub fn search_for_node_at_index(self: &Self, index: usize) -> Option<Node> {
[INFO] [stdout] 84 +     pub fn search_for_node_at_index(&self, index: usize) -> Option<Node> {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the type of the `self` parameter does not need to be arbitrary
[INFO] [stdout]   --> src/lib.rs:94:20
[INFO] [stdout]    |
[INFO] [stdout] 94 |     pub fn display(self: &Self) {
[INFO] [stdout]    |                    ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_arbitrary_self_type
[INFO] [stdout] help: remove the type
[INFO] [stdout]    |
[INFO] [stdout] 94 -     pub fn display(self: &Self) {
[INFO] [stdout] 94 +     pub fn display(&self) {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `indexer`
[INFO] [stdout]   --> src/lib.rs:80:13
[INFO] [stdout]    |
[INFO] [stdout] 80 |         let indexer = self.index;
[INFO] [stdout]    |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_indexer`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this boolean expression can be simplified
[INFO] [stdout]   --> src/lib.rs:35:40
[INFO] [stdout]    |
[INFO] [stdout] 35 |         } else if self.left == None && !self.right.is_none() {
[INFO] [stdout]    |                                        ^^^^^^^^^^^^^^^^^^^^^ help: try: `self.right.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/lib.rs:37:19
[INFO] [stdout]    |
[INFO] [stdout] 37 |         } else if !self.left.is_none() && self.right == None {
[INFO] [stdout]    |                   ^^^^^^^^^^^^^^^^^^^^ help: try: `self.left.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: called `unwrap` on `self.left` after checking its variant with `is_none`
[INFO] [stdout]   --> src/lib.rs:38:40
[INFO] [stdout]    |
[INFO] [stdout] 37 |         } else if !self.left.is_none() && self.right == None {
[INFO] [stdout]    |                    ------------------- the check is happening here
[INFO] [stdout] 38 |             println!("left child: {}", self.left.as_ref().unwrap().hash);
[INFO] [stdout]    |                                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: try using `if let` or `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: binary comparison to literal `Option::None`
[INFO] [stdout]   --> src/lib.rs:33:12
[INFO] [stdout]    |
[INFO] [stdout] 33 |         if self.left == None && self.right == None {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^ help: use `Option::is_none()` instead: `self.left.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: binary comparison to literal `Option::None`
[INFO] [stdout]   --> src/lib.rs:33:33
[INFO] [stdout]    |
[INFO] [stdout] 33 |         if self.left == None && self.right == None {
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^^ help: use `Option::is_none()` instead: `self.right.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: binary comparison to literal `Option::None`
[INFO] [stdout]   --> src/lib.rs:35:19
[INFO] [stdout]    |
[INFO] [stdout] 35 |         } else if self.left == None && !self.right.is_none() {
[INFO] [stdout]    |                   ^^^^^^^^^^^^^^^^^ help: use `Option::is_none()` instead: `self.left.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: binary comparison to literal `Option::None`
[INFO] [stdout]   --> src/lib.rs:37:43
[INFO] [stdout]    |
[INFO] [stdout] 37 |         } else if !self.left.is_none() && self.right == None {
[INFO] [stdout]    |                                           ^^^^^^^^^^^^^^^^^^ help: use `Option::is_none()` instead: `self.right.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: unused variable: `indexer`
[INFO] [stdout]   --> src/lib.rs:80:13
[INFO] [stdout]    |
[INFO] [stdout] 80 |         let indexer = self.index;
[INFO] [stdout]    |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_indexer`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `clone` on type `usize` which implements the `Copy` trait
[INFO] [stdout]    --> src/lib.rs:108:21
[INFO] [stdout]     |
[INFO] [stdout] 108 |     let mut index = node.index.clone();
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^ help: try removing the `clone` call: `node.index`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stdout]     = note: `#[warn(clippy::clone_on_copy)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of `.is_multiple_of()`
[INFO] [stdout]    --> src/lib.rs:111:12
[INFO] [stdout]     |
[INFO] [stdout] 111 |         if index % 2 == 0 {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^ help: replace with: `index.is_multiple_of(2)`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_is_multiple_of
[INFO] [stdout]     = note: `#[warn(clippy::manual_is_multiple_of)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: binary comparison to literal `Option::None`
[INFO] [stdout]    --> src/lib.rs:118:16
[INFO] [stdout]     |
[INFO] [stdout] 118 |             if tree.storage[index + 1usize] != None {
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `Option::is_some()` instead: `tree.storage[index + 1usize].is_some()`
[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: this boolean expression can be simplified
[INFO] [stdout]   --> src/lib.rs:35:40
[INFO] [stdout]    |
[INFO] [stdout] 35 |         } else if self.left == None && !self.right.is_none() {
[INFO] [stdout]    |                                        ^^^^^^^^^^^^^^^^^^^^^ help: try: `self.right.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/lib.rs:37:19
[INFO] [stdout]    |
[INFO] [stdout] 37 |         } else if !self.left.is_none() && self.right == None {
[INFO] [stdout]    |                   ^^^^^^^^^^^^^^^^^^^^ help: try: `self.left.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: called `unwrap` on `self.left` after checking its variant with `is_none`
[INFO] [stdout]   --> src/lib.rs:38:40
[INFO] [stdout]    |
[INFO] [stdout] 37 |         } else if !self.left.is_none() && self.right == None {
[INFO] [stdout]    |                    ------------------- the check is happening here
[INFO] [stdout] 38 |             println!("left child: {}", self.left.as_ref().unwrap().hash);
[INFO] [stdout]    |                                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: try using `if let` or `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: binary comparison to literal `Option::None`
[INFO] [stdout]   --> src/lib.rs:33:12
[INFO] [stdout]    |
[INFO] [stdout] 33 |         if self.left == None && self.right == None {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^ help: use `Option::is_none()` instead: `self.left.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: binary comparison to literal `Option::None`
[INFO] [stdout]   --> src/lib.rs:33:33
[INFO] [stdout]    |
[INFO] [stdout] 33 |         if self.left == None && self.right == None {
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^^ help: use `Option::is_none()` instead: `self.right.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: binary comparison to literal `Option::None`
[INFO] [stdout]   --> src/lib.rs:35:19
[INFO] [stdout]    |
[INFO] [stdout] 35 |         } else if self.left == None && !self.right.is_none() {
[INFO] [stdout]    |                   ^^^^^^^^^^^^^^^^^ help: use `Option::is_none()` instead: `self.left.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: binary comparison to literal `Option::None`
[INFO] [stdout]   --> src/lib.rs:37:43
[INFO] [stdout]    |
[INFO] [stdout] 37 |         } else if !self.left.is_none() && self.right == None {
[INFO] [stdout]    |                                           ^^^^^^^^^^^^^^^^^^ help: use `Option::is_none()` instead: `self.right.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: using `clone` on type `usize` which implements the `Copy` trait
[INFO] [stdout]    --> src/lib.rs:108:21
[INFO] [stdout]     |
[INFO] [stdout] 108 |     let mut index = node.index.clone();
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^ help: try removing the `clone` call: `node.index`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stdout]     = note: `#[warn(clippy::clone_on_copy)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of `.is_multiple_of()`
[INFO] [stdout]    --> src/lib.rs:111:12
[INFO] [stdout]     |
[INFO] [stdout] 111 |         if index % 2 == 0 {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^ help: replace with: `index.is_multiple_of(2)`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_is_multiple_of
[INFO] [stdout]     = note: `#[warn(clippy::manual_is_multiple_of)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: binary comparison to literal `Option::None`
[INFO] [stdout]    --> src/lib.rs:118:16
[INFO] [stdout]     |
[INFO] [stdout] 118 |             if tree.storage[index + 1usize] != None {
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `Option::is_some()` instead: `tree.storage[index + 1usize].is_some()`
[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: this import is redundant
[INFO] [stdout]  --> src/main.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | use hex;
[INFO] [stdout]   | ^^^^^^^^ help: remove it entirely
[INFO] [stdout]   |
[INFO] [stdout]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_component_path_imports
[INFO] [stdout]   = note: `#[warn(clippy::single_component_path_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this import is redundant
[INFO] [stdout]  --> src/main.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | use hex;
[INFO] [stdout]   | ^^^^^^^^ help: remove it entirely
[INFO] [stdout]   |
[INFO] [stdout]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_component_path_imports
[INFO] [stdout]   = note: `#[warn(clippy::single_component_path_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.23s
[INFO] running `Command { std: "docker" "inspect" "1f427e08c0f06636974ad56bc91b9006d2a548f6dee50f57281e8fb39bcbc4d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1f427e08c0f06636974ad56bc91b9006d2a548f6dee50f57281e8fb39bcbc4d5", kill_on_drop: false }`
[INFO] [stdout] 1f427e08c0f06636974ad56bc91b9006d2a548f6dee50f57281e8fb39bcbc4d5