[INFO] cloning repository https://github.com/eggnogdev/huffman-coding
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/eggnogdev/huffman-coding" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Feggnogdev%2Fhuffman-coding", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Feggnogdev%2Fhuffman-coding'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 14c4249f9c0cf9cae8269788de8230c58b1ecb22
[INFO] linting eggnogdev/huffman-coding against nightly for clippy-nonminimal_bool-denied
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Feggnogdev%2Fhuffman-coding" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/eggnogdev/huffman-coding
[INFO] finished tweaking git repo https://github.com/eggnogdev/huffman-coding
[INFO] tweaked toml for git repo https://github.com/eggnogdev/huffman-coding written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/eggnogdev/huffman-coding 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/eggnogdev/huffman-coding 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded clap v4.5.28
[INFO] [stderr]   Downloaded clap_derive v4.5.28
[INFO] [stderr]   Downloaded clap_builder v4.5.27
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] e56c2b7fa92a5ad7c0bc8825fe693102a6b6322790ae6bf76e578c76b16c2588
[INFO] running `Command { std: "docker" "start" "-a" "e56c2b7fa92a5ad7c0bc8825fe693102a6b6322790ae6bf76e578c76b16c2588", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e56c2b7fa92a5ad7c0bc8825fe693102a6b6322790ae6bf76e578c76b16c2588", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e56c2b7fa92a5ad7c0bc8825fe693102a6b6322790ae6bf76e578c76b16c2588", kill_on_drop: false }`
[INFO] [stdout] e56c2b7fa92a5ad7c0bc8825fe693102a6b6322790ae6bf76e578c76b16c2588
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 8a8da90b45bb77c87d224fa905810286d57e7172fb3683cf2d1751a592e10e71
[INFO] running `Command { std: "docker" "start" "-a" "8a8da90b45bb77c87d224fa905810286d57e7172fb3683cf2d1751a592e10e71", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.93
[INFO] [stderr]    Compiling unicode-ident v1.0.16
[INFO] [stderr]     Checking utf8parse v0.2.2
[INFO] [stderr]     Checking colorchoice v1.0.3
[INFO] [stderr]     Checking anstyle-query v1.1.2
[INFO] [stderr]     Checking is_terminal_polyfill v1.70.1
[INFO] [stderr]     Checking anstyle v1.0.10
[INFO] [stderr]    Compiling heck v0.5.0
[INFO] [stderr]     Checking strsim v0.11.1
[INFO] [stderr]     Checking clap_lex v0.7.4
[INFO] [stderr]     Checking anstyle-parse v0.2.6
[INFO] [stderr]     Checking anstream v0.6.18
[INFO] [stderr]     Checking clap_builder v4.5.27
[INFO] [stderr]    Compiling quote v1.0.38
[INFO] [stderr]    Compiling syn v2.0.98
[INFO] [stderr]    Compiling clap_derive v4.5.28
[INFO] [stderr]     Checking clap v4.5.28
[INFO] [stderr]     Checking huffman-coding v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/char_code.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | /     return CharCodePair {
[INFO] [stdout] 11 | |       value,
[INFO] [stdout] 12 | |       bits,
[INFO] [stdout] 13 | |       code,
[INFO] [stdout] 14 | |     }
[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 ~     CharCodePair {
[INFO] [stdout] 11 +       value,
[INFO] [stdout] 12 +       bits,
[INFO] [stdout] 13 +       code,
[INFO] [stdout] 14 +     }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/char_code.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | /     return CharCodePair {
[INFO] [stdout] 11 | |       value,
[INFO] [stdout] 12 | |       bits,
[INFO] [stdout] 13 | |       code,
[INFO] [stdout] 14 | |     }
[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 ~     CharCodePair {
[INFO] [stdout] 11 +       value,
[INFO] [stdout] 12 +       bits,
[INFO] [stdout] 13 +       code,
[INFO] [stdout] 14 +     }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/huffman_coding.rs:85:5
[INFO] [stdout]    |
[INFO] [stdout] 85 |     return result;
[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] 85 -     return result;
[INFO] [stdout] 85 +     result
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/huffman_coding.rs:101:5
[INFO] [stdout]     |
[INFO] [stdout] 101 |     return compressed;
[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] 101 -     return compressed;
[INFO] [stdout] 101 +     compressed
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: needless call to `as_bytes`
[INFO] [stdout]   --> src/huffman_coding.rs:93:22
[INFO] [stdout]    |
[INFO] [stdout] 93 |       let og_bytes = s.as_bytes().len() as f64;
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^^^^ help: `len()` can be called directly on strings: `s.len()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_as_bytes
[INFO] [stdout]    = note: `#[warn(clippy::needless_as_bytes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/huffman_coding.rs:165:5
[INFO] [stdout]     |
[INFO] [stdout] 165 |     return result;
[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] 165 -     return result;
[INFO] [stdout] 165 +     result
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/huffman_coding.rs:85:5
[INFO] [stdout]    |
[INFO] [stdout] 85 |     return result;
[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] 85 -     return result;
[INFO] [stdout] 85 +     result
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/huffman_coding.rs:172:5
[INFO] [stdout]     |
[INFO] [stdout] 172 |     return decompressed;
[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] 172 -     return decompressed;
[INFO] [stdout] 172 +     decompressed
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: called `unwrap` on `left_char` after checking its variant with `is_some`
[INFO] [stdout]    --> src/huffman_coding.rs:201:23
[INFO] [stdout]     |
[INFO] [stdout] 197 |     if left_char.is_some() {
[INFO] [stdout]     |     ---------------------- help: try: `if let Some(<item>) = left_char`
[INFO] [stdout] ...
[INFO] [stdout] 201 |       let left_char = left_char.unwrap();
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[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: called `unwrap` on `right_char` after checking its variant with `is_some`
[INFO] [stdout]    --> src/huffman_coding.rs:215:24
[INFO] [stdout]     |
[INFO] [stdout] 211 |     if right_char.is_some() {
[INFO] [stdout]     |     ----------------------- help: try: `if let Some(<item>) = right_char`
[INFO] [stdout] ...
[INFO] [stdout] 215 |       let right_char = right_char.unwrap();
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_unwrap
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: called `unwrap` on `tree.left` after checking its variant with `is_some`
[INFO] [stdout]    --> src/huffman_coding.rs:231:10
[INFO] [stdout]     |
[INFO] [stdout] 225 |     if tree.left.is_some() {
[INFO] [stdout]     |     ---------------------- help: try: `if let Some(<item>) = &tree.left`
[INFO] [stdout] ...
[INFO] [stdout] 231 |         &tree.left.as_ref().unwrap(),
[INFO] [stdout]     |          ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_unwrap
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/huffman_coding.rs:101:5
[INFO] [stdout]     |
[INFO] [stdout] 101 |     return compressed;
[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] 101 -     return compressed;
[INFO] [stdout] 101 +     compressed
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: called `unwrap` on `tree.right` after checking its variant with `is_some`
[INFO] [stdout]    --> src/huffman_coding.rs:244:10
[INFO] [stdout]     |
[INFO] [stdout] 238 |     if tree.right.is_some() {
[INFO] [stdout]     |     ----------------------- help: try: `if let Some(<item>) = &tree.right`
[INFO] [stdout] ...
[INFO] [stdout] 244 |         &tree.right.as_ref().unwrap(),
[INFO] [stdout]     |          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_unwrap
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: needless call to `as_bytes`
[INFO] [stdout]   --> src/huffman_coding.rs:93:22
[INFO] [stdout]    |
[INFO] [stdout] 93 |       let og_bytes = s.as_bytes().len() as f64;
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^^^^ help: `len()` can be called directly on strings: `s.len()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_as_bytes
[INFO] [stdout]    = note: `#[warn(clippy::needless_as_bytes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/huffman_coding.rs:231:9
[INFO] [stdout]     |
[INFO] [stdout] 231 |         &tree.left.as_ref().unwrap(),
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: change this to: `tree.left.as_ref().unwrap()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout]     = note: `#[warn(clippy::needless_borrow)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/huffman_coding.rs:244:9
[INFO] [stdout]     |
[INFO] [stdout] 244 |         &tree.right.as_ref().unwrap(),
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: change this to: `tree.right.as_ref().unwrap()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/huffman_coding.rs:165:5
[INFO] [stdout]     |
[INFO] [stdout] 165 |     return result;
[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] 165 -     return result;
[INFO] [stdout] 165 +     result
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/huffman_coding.rs:256:16
[INFO] [stdout]     |
[INFO] [stdout] 256 |         return &pair;
[INFO] [stdout]     |                ^^^^^ help: change this to: `pair`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/huffman_coding.rs:280:5
[INFO] [stdout]     |
[INFO] [stdout] 280 |     return result;
[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] 280 -     return result;
[INFO] [stdout] 280 +     result
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/huffman_coding.rs:291:5
[INFO] [stdout]     |
[INFO] [stdout] 291 |     return result;
[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] 291 -     return result;
[INFO] [stdout] 291 +     result
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/huffman_coding.rs:312:5
[INFO] [stdout]     |
[INFO] [stdout] 312 |     return result;
[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] 312 -     return result;
[INFO] [stdout] 312 +     result
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: writing `&Vec` instead of `&[_]` involves a new object where a slice will do
[INFO] [stdout]    --> src/huffman_coding.rs:295:33
[INFO] [stdout]     |
[INFO] [stdout] 295 |   fn get_metadata_from_bytes(b: &Vec<u8>) -> Vec<MetadataKeyValuePair> {
[INFO] [stdout]     |                                 ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stdout]     = note: `#[warn(clippy::ptr_arg)]` on by default
[INFO] [stdout] help: change this to
[INFO] [stdout]     |
[INFO] [stdout] 295 -   fn get_metadata_from_bytes(b: &Vec<u8>) -> Vec<MetadataKeyValuePair> {
[INFO] [stdout] 295 +   fn get_metadata_from_bytes(b: &[u8]) -> Vec<MetadataKeyValuePair> {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/huffman_coding.rs:327:5
[INFO] [stdout]     |
[INFO] [stdout] 327 |     return result;
[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] 327 -     return result;
[INFO] [stdout] 327 +     result
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/huffman_coding.rs:323:21
[INFO] [stdout]     |
[INFO] [stdout] 323 |         result.push(&entry);
[INFO] [stdout]     |                     ^^^^^^ help: change this to: `entry`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/huffman_coding.rs:340:5
[INFO] [stdout]     |
[INFO] [stdout] 340 |     return result;
[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] 340 -     return result;
[INFO] [stdout] 340 +     result
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.93s
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/huffman_coding.rs:356:5
[INFO] [stdout]     |
[INFO] [stdout] 356 |     return None;
[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] 356 -     return None;
[INFO] [stdout] 356 +     None
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/huffman_tree.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 |     return HuffmanTree { trunk };
[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] 19 -     return HuffmanTree { trunk };
[INFO] [stdout] 19 +     HuffmanTree { trunk }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/huffman_tree.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 26 |     return tree;
[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] 26 -     return tree;
[INFO] [stdout] 26 +     tree
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/huffman_tree.rs:38:5
[INFO] [stdout]    |
[INFO] [stdout] 38 |     return frequencies;
[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] 38 -     return frequencies;
[INFO] [stdout] 38 +     frequencies
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/huffman_coding.rs:172:5
[INFO] [stdout]     |
[INFO] [stdout] 172 |     return decompressed;
[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] 172 -     return decompressed;
[INFO] [stdout] 172 +     decompressed
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: called `unwrap` on `left_char` after checking its variant with `is_some`
[INFO] [stdout]    --> src/huffman_coding.rs:201:23
[INFO] [stdout]     |
[INFO] [stdout] 197 |     if left_char.is_some() {
[INFO] [stdout]     |     ---------------------- help: try: `if let Some(<item>) = left_char`
[INFO] [stdout] ...
[INFO] [stdout] 201 |       let left_char = left_char.unwrap();
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[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: called `unwrap` on `right_char` after checking its variant with `is_some`
[INFO] [stdout]    --> src/huffman_coding.rs:215:24
[INFO] [stdout]     |
[INFO] [stdout] 211 |     if right_char.is_some() {
[INFO] [stdout]     |     ----------------------- help: try: `if let Some(<item>) = right_char`
[INFO] [stdout] ...
[INFO] [stdout] 215 |       let right_char = right_char.unwrap();
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_unwrap
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/huffman_tree.rs:75:5
[INFO] [stdout]    |
[INFO] [stdout] 75 |     return None;
[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] 75 -     return None;
[INFO] [stdout] 75 +     None
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: called `unwrap` on `tree.left` after checking its variant with `is_some`
[INFO] [stdout]    --> src/huffman_coding.rs:231:10
[INFO] [stdout]     |
[INFO] [stdout] 225 |     if tree.left.is_some() {
[INFO] [stdout]     |     ---------------------- help: try: `if let Some(<item>) = &tree.left`
[INFO] [stdout] ...
[INFO] [stdout] 231 |         &tree.left.as_ref().unwrap(),
[INFO] [stdout]     |          ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_unwrap
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: called `unwrap` on `tree.right` after checking its variant with `is_some`
[INFO] [stdout]    --> src/huffman_coding.rs:244:10
[INFO] [stdout]     |
[INFO] [stdout] 238 |     if tree.right.is_some() {
[INFO] [stdout]     |     ----------------------- help: try: `if let Some(<item>) = &tree.right`
[INFO] [stdout] ...
[INFO] [stdout] 244 |         &tree.right.as_ref().unwrap(),
[INFO] [stdout]     |          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_unwrap
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/huffman_coding.rs:231:9
[INFO] [stdout]     |
[INFO] [stdout] 231 |         &tree.left.as_ref().unwrap(),
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: change this to: `tree.left.as_ref().unwrap()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout]     = note: `#[warn(clippy::needless_borrow)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/huffman_coding.rs:244:9
[INFO] [stdout]     |
[INFO] [stdout] 244 |         &tree.right.as_ref().unwrap(),
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: change this to: `tree.right.as_ref().unwrap()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/huffman_coding.rs:256:16
[INFO] [stdout]     |
[INFO] [stdout] 256 |         return &pair;
[INFO] [stdout]     |                ^^^^^ help: change this to: `pair`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/huffman_coding.rs:280:5
[INFO] [stdout]     |
[INFO] [stdout] 280 |     return result;
[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] 280 -     return result;
[INFO] [stdout] 280 +     result
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/huffman_coding.rs:291:5
[INFO] [stdout]     |
[INFO] [stdout] 291 |     return result;
[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] 291 -     return result;
[INFO] [stdout] 291 +     result
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/huffman_coding.rs:312:5
[INFO] [stdout]     |
[INFO] [stdout] 312 |     return result;
[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] 312 -     return result;
[INFO] [stdout] 312 +     result
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: writing `&Vec` instead of `&[_]` involves a new object where a slice will do
[INFO] [stdout]    --> src/huffman_coding.rs:295:33
[INFO] [stdout]     |
[INFO] [stdout] 295 |   fn get_metadata_from_bytes(b: &Vec<u8>) -> Vec<MetadataKeyValuePair> {
[INFO] [stdout]     |                                 ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stdout]     = note: `#[warn(clippy::ptr_arg)]` on by default
[INFO] [stdout] help: change this to
[INFO] [stdout]     |
[INFO] [stdout] 295 -   fn get_metadata_from_bytes(b: &Vec<u8>) -> Vec<MetadataKeyValuePair> {
[INFO] [stdout] 295 +   fn get_metadata_from_bytes(b: &[u8]) -> Vec<MetadataKeyValuePair> {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/huffman_coding.rs:327:5
[INFO] [stdout]     |
[INFO] [stdout] 327 |     return result;
[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] 327 -     return result;
[INFO] [stdout] 327 +     result
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of `Iterator::find`
[INFO] [stdout]   --> src/huffman_tree.rs:69:5
[INFO] [stdout]    |
[INFO] [stdout] 69 | /     for pair in pairs {
[INFO] [stdout] 70 | |       if pair.value == c {
[INFO] [stdout] 71 | |         return Some(pair);
[INFO] [stdout] ...  |
[INFO] [stdout] 75 | |     return None;
[INFO] [stdout]    | |________________^ help: replace with an iterator: `pairs.iter_mut().find(|pair| pair.value == c).map(|v| v as _)`
[INFO] [stdout]    |
[INFO] [stdout]    = note: you may need to dereference some variables
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_find
[INFO] [stdout]    = note: `#[warn(clippy::manual_find)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/huffman_coding.rs:323:21
[INFO] [stdout]     |
[INFO] [stdout] 323 |         result.push(&entry);
[INFO] [stdout]     |                     ^^^^^^ help: change this to: `entry`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/huffman_tree.rs:94:5
[INFO] [stdout]    |
[INFO] [stdout] 94 |     return left_frequency + right_frequency + char_frequency;
[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] 94 -     return left_frequency + right_frequency + char_frequency;
[INFO] [stdout] 94 +     left_frequency + right_frequency + char_frequency
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/huffman_coding.rs:340:5
[INFO] [stdout]     |
[INFO] [stdout] 340 |     return result;
[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] 340 -     return result;
[INFO] [stdout] 340 +     result
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]   --> src/huffman_tree.rs:80:59
[INFO] [stdout]    |
[INFO] [stdout] 80 |       Some(lnode) => Self::get_total_frequency_below_node(&lnode),
[INFO] [stdout]    |                                                           ^^^^^^ help: change this to: `lnode`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/huffman_coding.rs:356:5
[INFO] [stdout]     |
[INFO] [stdout] 356 |     return None;
[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] 356 -     return None;
[INFO] [stdout] 356 +     None
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/huffman_tree.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 |     return HuffmanTree { trunk };
[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] 19 -     return HuffmanTree { trunk };
[INFO] [stdout] 19 +     HuffmanTree { trunk }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/huffman_tree.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 26 |     return tree;
[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] 26 -     return tree;
[INFO] [stdout] 26 +     tree
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/huffman_tree.rs:38:5
[INFO] [stdout]    |
[INFO] [stdout] 38 |     return frequencies;
[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] 38 -     return frequencies;
[INFO] [stdout] 38 +     frequencies
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]   --> src/huffman_tree.rs:85:59
[INFO] [stdout]    |
[INFO] [stdout] 85 |       Some(rnode) => Self::get_total_frequency_below_node(&rnode),
[INFO] [stdout]    |                                                           ^^^^^^ help: change this to: `rnode`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/huffman_tree.rs:75:5
[INFO] [stdout]    |
[INFO] [stdout] 75 |     return None;
[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] 75 -     return None;
[INFO] [stdout] 75 +     None
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of `Iterator::find`
[INFO] [stdout]   --> src/huffman_tree.rs:69:5
[INFO] [stdout]    |
[INFO] [stdout] 69 | /     for pair in pairs {
[INFO] [stdout] 70 | |       if pair.value == c {
[INFO] [stdout] 71 | |         return Some(pair);
[INFO] [stdout] ...  |
[INFO] [stdout] 75 | |     return None;
[INFO] [stdout]    | |________________^ help: replace with an iterator: `pairs.iter_mut().find(|pair| pair.value == c).map(|v| v as _)`
[INFO] [stdout]    |
[INFO] [stdout]    = note: you may need to dereference some variables
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_find
[INFO] [stdout]    = note: `#[warn(clippy::manual_find)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded unit return type
[INFO] [stdout]    --> src/huffman_tree.rs:102:4
[INFO] [stdout]     |
[INFO] [stdout] 102 |   ) -> () {
[INFO] [stdout]     |    ^^^^^^ help: remove the `-> ()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_unit
[INFO] [stdout]     = note: `#[warn(clippy::unused_unit)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/huffman_tree.rs:94:5
[INFO] [stdout]    |
[INFO] [stdout] 94 |     return left_frequency + right_frequency + char_frequency;
[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] 94 -     return left_frequency + right_frequency + char_frequency;
[INFO] [stdout] 94 +     left_frequency + right_frequency + char_frequency
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]   --> src/huffman_tree.rs:80:59
[INFO] [stdout]    |
[INFO] [stdout] 80 |       Some(lnode) => Self::get_total_frequency_below_node(&lnode),
[INFO] [stdout]    |                                                           ^^^^^^ help: change this to: `lnode`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]   --> src/huffman_tree.rs:85:59
[INFO] [stdout]    |
[INFO] [stdout] 85 |       Some(rnode) => Self::get_total_frequency_below_node(&rnode),
[INFO] [stdout]    |                                                           ^^^^^^ help: change this to: `rnode`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/huffman_tree.rs:162:5
[INFO] [stdout]     |
[INFO] [stdout] 162 |     return queue[0].to_tree_node();
[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] 162 -     return queue[0].to_tree_node();
[INFO] [stdout] 162 +     queue[0].to_tree_node()
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded unit return type
[INFO] [stdout]    --> src/huffman_tree.rs:102:4
[INFO] [stdout]     |
[INFO] [stdout] 102 |   ) -> () {
[INFO] [stdout]     |    ^^^^^^ help: remove the `-> ()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_unit
[INFO] [stdout]     = note: `#[warn(clippy::unused_unit)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/huffman_tree.rs:162:5
[INFO] [stdout]     |
[INFO] [stdout] 162 |     return queue[0].to_tree_node();
[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] 162 -     return queue[0].to_tree_node();
[INFO] [stdout] 162 +     queue[0].to_tree_node()
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/huffman_tree.rs:202:5
[INFO] [stdout]     |
[INFO] [stdout] 202 | /     return HuffmanTreeNode {
[INFO] [stdout] 203 | |       left: match left {
[INFO] [stdout] 204 | |         Some(lnode) => Some(Box::new(lnode)),
[INFO] [stdout] 205 | |         None => None,
[INFO] [stdout] ...   |
[INFO] [stdout] 211 | |       value
[INFO] [stdout] 212 | |     }
[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] 202 ~     HuffmanTreeNode {
[INFO] [stdout] 203 +       left: match left {
[INFO] [stdout] 204 +         Some(lnode) => Some(Box::new(lnode)),
[INFO] [stdout] 205 +         None => None,
[INFO] [stdout] 206 +       },
[INFO] [stdout] 207 +       right: match right {
[INFO] [stdout] 208 +         Some(rnode) => Some(Box::new(rnode)),
[INFO] [stdout] 209 +         None => None,
[INFO] [stdout] 210 +       },
[INFO] [stdout] 211 +       value
[INFO] [stdout] 212 +     }
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of `Option::map`
[INFO] [stdout]    --> src/huffman_tree.rs:185:41
[INFO] [stdout]     |
[INFO] [stdout] 185 |       let left: Option<HuffmanTreeNode> = match &self.left {
[INFO] [stdout]     |  _________________________________________^
[INFO] [stdout] 186 | |       Some(lnode) => Some(lnode.to_tree_node()),
[INFO] [stdout] 187 | |       None => None,
[INFO] [stdout] 188 | |     };
[INFO] [stdout]     | |_____^ help: try: `self.left.as_ref().map(|lnode| lnode.to_tree_node())`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_map
[INFO] [stdout]     = note: `#[warn(clippy::manual_map)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of `Option::map`
[INFO] [stdout]    --> src/huffman_tree.rs:191:42
[INFO] [stdout]     |
[INFO] [stdout] 191 |       let right: Option<HuffmanTreeNode> = match &self.right {
[INFO] [stdout]     |  __________________________________________^
[INFO] [stdout] 192 | |       Some(rnode) => Some(rnode.to_tree_node()),
[INFO] [stdout] 193 | |       None => None,
[INFO] [stdout] 194 | |     };
[INFO] [stdout]     | |_____^ help: try: `self.right.as_ref().map(|rnode| rnode.to_tree_node())`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_map
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of `Option::map`
[INFO] [stdout]    --> src/huffman_tree.rs:197:31
[INFO] [stdout]     |
[INFO] [stdout] 197 |       let value: Option<char> = match &self.value {
[INFO] [stdout]     |  _______________________________^
[INFO] [stdout] 198 | |       Some(cf) => Some(cf.value),
[INFO] [stdout] 199 | |       None => None,
[INFO] [stdout] 200 | |     };
[INFO] [stdout]     | |_____^ help: try: `self.value.as_ref().map(|cf| cf.value)`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_map
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/huffman_tree.rs:202:5
[INFO] [stdout]     |
[INFO] [stdout] 202 | /     return HuffmanTreeNode {
[INFO] [stdout] 203 | |       left: match left {
[INFO] [stdout] 204 | |         Some(lnode) => Some(Box::new(lnode)),
[INFO] [stdout] 205 | |         None => None,
[INFO] [stdout] ...   |
[INFO] [stdout] 211 | |       value
[INFO] [stdout] 212 | |     }
[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] 202 ~     HuffmanTreeNode {
[INFO] [stdout] 203 +       left: match left {
[INFO] [stdout] 204 +         Some(lnode) => Some(Box::new(lnode)),
[INFO] [stdout] 205 +         None => None,
[INFO] [stdout] 206 +       },
[INFO] [stdout] 207 +       right: match right {
[INFO] [stdout] 208 +         Some(rnode) => Some(Box::new(rnode)),
[INFO] [stdout] 209 +         None => None,
[INFO] [stdout] 210 +       },
[INFO] [stdout] 211 +       value
[INFO] [stdout] 212 +     }
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of `Option::map`
[INFO] [stdout]    --> src/huffman_tree.rs:203:13
[INFO] [stdout]     |
[INFO] [stdout] 203 |         left: match left {
[INFO] [stdout]     |  _____________^
[INFO] [stdout] 204 | |         Some(lnode) => Some(Box::new(lnode)),
[INFO] [stdout] 205 | |         None => None,
[INFO] [stdout] 206 | |       },
[INFO] [stdout]     | |_______^ help: try: `left.map(Box::new)`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_map
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of `Option::map`
[INFO] [stdout]    --> src/huffman_tree.rs:185:41
[INFO] [stdout]     |
[INFO] [stdout] 185 |       let left: Option<HuffmanTreeNode> = match &self.left {
[INFO] [stdout]     |  _________________________________________^
[INFO] [stdout] 186 | |       Some(lnode) => Some(lnode.to_tree_node()),
[INFO] [stdout] 187 | |       None => None,
[INFO] [stdout] 188 | |     };
[INFO] [stdout]     | |_____^ help: try: `self.left.as_ref().map(|lnode| lnode.to_tree_node())`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_map
[INFO] [stdout]     = note: `#[warn(clippy::manual_map)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of `Option::map`
[INFO] [stdout]    --> src/huffman_tree.rs:207:14
[INFO] [stdout]     |
[INFO] [stdout] 207 |         right: match right {
[INFO] [stdout]     |  ______________^
[INFO] [stdout] 208 | |         Some(rnode) => Some(Box::new(rnode)),
[INFO] [stdout] 209 | |         None => None,
[INFO] [stdout] 210 | |       },
[INFO] [stdout]     | |_______^ help: try: `right.map(Box::new)`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_map
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of `Option::map`
[INFO] [stdout]    --> src/huffman_tree.rs:191:42
[INFO] [stdout]     |
[INFO] [stdout] 191 |       let right: Option<HuffmanTreeNode> = match &self.right {
[INFO] [stdout]     |  __________________________________________^
[INFO] [stdout] 192 | |       Some(rnode) => Some(rnode.to_tree_node()),
[INFO] [stdout] 193 | |       None => None,
[INFO] [stdout] 194 | |     };
[INFO] [stdout]     | |_____^ help: try: `self.right.as_ref().map(|rnode| rnode.to_tree_node())`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_map
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of `Option::map`
[INFO] [stdout]    --> src/huffman_tree.rs:197:31
[INFO] [stdout]     |
[INFO] [stdout] 197 |       let value: Option<char> = match &self.value {
[INFO] [stdout]     |  _______________________________^
[INFO] [stdout] 198 | |       Some(cf) => Some(cf.value),
[INFO] [stdout] 199 | |       None => None,
[INFO] [stdout] 200 | |     };
[INFO] [stdout]     | |_____^ help: try: `self.value.as_ref().map(|cf| cf.value)`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_map
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/merge_sort.rs:12:7
[INFO] [stdout]    |
[INFO] [stdout] 12 |       return values;
[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] 12 -       return values;
[INFO] [stdout] 12 +       values
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/merge_sort.rs:17:7
[INFO] [stdout]    |
[INFO] [stdout] 17 |       return Self::merge(a, b, condition);
[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] 17 -       return Self::merge(a, b, condition);
[INFO] [stdout] 17 +       Self::merge(a, b, condition)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of `Option::map`
[INFO] [stdout]    --> src/huffman_tree.rs:203:13
[INFO] [stdout]     |
[INFO] [stdout] 203 |         left: match left {
[INFO] [stdout]     |  _____________^
[INFO] [stdout] 204 | |         Some(lnode) => Some(Box::new(lnode)),
[INFO] [stdout] 205 | |         None => None,
[INFO] [stdout] 206 | |       },
[INFO] [stdout]     | |_______^ help: try: `left.map(Box::new)`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_map
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of `Option::map`
[INFO] [stdout]    --> src/huffman_tree.rs:207:14
[INFO] [stdout]     |
[INFO] [stdout] 207 |         right: match right {
[INFO] [stdout]     |  ______________^
[INFO] [stdout] 208 | |         Some(rnode) => Some(Box::new(rnode)),
[INFO] [stdout] 209 | |         None => None,
[INFO] [stdout] 210 | |       },
[INFO] [stdout]     | |_______^ help: try: `right.map(Box::new)`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_map
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/merge_sort.rs:12:7
[INFO] [stdout]    |
[INFO] [stdout] 12 |       return values;
[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] 12 -       return values;
[INFO] [stdout] 12 +       values
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this boolean expression can be simplified
[INFO] [stdout]   --> src/merge_sort.rs:29:10
[INFO] [stdout]    |
[INFO] [stdout] 29 |       if !(a_index < a.len()) && b_index < b.len() {
[INFO] [stdout]    |          ^^^^^^^^^^^^^^^^^^^^ help: try: `(a_index >= a.len())`
[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: unneeded `return` statement
[INFO] [stdout]   --> src/merge_sort.rs:17:7
[INFO] [stdout]    |
[INFO] [stdout] 17 |       return Self::merge(a, b, condition);
[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] 17 -       return Self::merge(a, b, condition);
[INFO] [stdout] 17 +       Self::merge(a, b, condition)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this boolean expression can be simplified
[INFO] [stdout]   --> src/merge_sort.rs:33:17
[INFO] [stdout]    |
[INFO] [stdout] 33 |       } else if !(b_index < b.len()) && a_index < a.len() {
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^ help: try: `(b_index >= b.len())`
[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: unneeded `return` statement
[INFO] [stdout]   --> src/merge_sort.rs:52:5
[INFO] [stdout]    |
[INFO] [stdout] 52 |     return merged;
[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] 52 -     return merged;
[INFO] [stdout] 52 +     merged
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this boolean expression can be simplified
[INFO] [stdout]   --> src/merge_sort.rs:29:10
[INFO] [stdout]    |
[INFO] [stdout] 29 |       if !(a_index < a.len()) && b_index < b.len() {
[INFO] [stdout]    |          ^^^^^^^^^^^^^^^^^^^^ help: try: `(a_index >= a.len())`
[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/merge_sort.rs:33:17
[INFO] [stdout]    |
[INFO] [stdout] 33 |       } else if !(b_index < b.len()) && a_index < a.len() {
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^ help: try: `(b_index >= b.len())`
[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: unneeded `return` statement
[INFO] [stdout]   --> src/merge_sort.rs:52:5
[INFO] [stdout]    |
[INFO] [stdout] 52 |     return merged;
[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] 52 -     return merged;
[INFO] [stdout] 52 +     merged
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/metadata.rs:76:5
[INFO] [stdout]    |
[INFO] [stdout] 76 |     return MetadataKeyValuePair { key, value };
[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] 76 -     return MetadataKeyValuePair { key, value };
[INFO] [stdout] 76 +     MetadataKeyValuePair { key, value }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/metadata.rs:76:5
[INFO] [stdout]    |
[INFO] [stdout] 76 |     return MetadataKeyValuePair { key, value };
[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] 76 -     return MetadataKeyValuePair { key, value };
[INFO] [stdout] 76 +     MetadataKeyValuePair { key, value }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/metadata.rs:117:5
[INFO] [stdout]     |
[INFO] [stdout] 117 |     return result;
[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] 117 -     return result;
[INFO] [stdout] 117 +     result
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/metadata.rs:117:5
[INFO] [stdout]     |
[INFO] [stdout] 117 |     return result;
[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] 117 -     return result;
[INFO] [stdout] 117 +     result
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/metadata.rs:121:5
[INFO] [stdout]     |
[INFO] [stdout] 121 | /     return MetadataKeyValuePair {
[INFO] [stdout] 122 | |       key: START_METADATA,
[INFO] [stdout] 123 | |       value: 0, 
[INFO] [stdout] 124 | |     };
[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] 121 ~     MetadataKeyValuePair {
[INFO] [stdout] 122 +       key: START_METADATA,
[INFO] [stdout] 123 +       value: 0, 
[INFO] [stdout] 124 ~     }
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/metadata.rs:128:5
[INFO] [stdout]     |
[INFO] [stdout] 128 | /     return MetadataKeyValuePair {
[INFO] [stdout] 129 | |       key: END_METADATA,
[INFO] [stdout] 130 | |       value: bits,
[INFO] [stdout] 131 | |     };
[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] 128 ~     MetadataKeyValuePair {
[INFO] [stdout] 129 +       key: END_METADATA,
[INFO] [stdout] 130 +       value: bits,
[INFO] [stdout] 131 ~     }
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/metadata.rs:198:5
[INFO] [stdout]     |
[INFO] [stdout] 198 | /     return MetadataKeyValuePair {
[INFO] [stdout] 199 | |       key,
[INFO] [stdout] 200 | |       value,
[INFO] [stdout] 201 | |     };
[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] 198 ~     MetadataKeyValuePair {
[INFO] [stdout] 199 +       key,
[INFO] [stdout] 200 +       value,
[INFO] [stdout] 201 ~     }
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/metadata.rs:121:5
[INFO] [stdout]     |
[INFO] [stdout] 121 | /     return MetadataKeyValuePair {
[INFO] [stdout] 122 | |       key: START_METADATA,
[INFO] [stdout] 123 | |       value: 0, 
[INFO] [stdout] 124 | |     };
[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] 121 ~     MetadataKeyValuePair {
[INFO] [stdout] 122 +       key: START_METADATA,
[INFO] [stdout] 123 +       value: 0, 
[INFO] [stdout] 124 ~     }
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/metadata.rs:128:5
[INFO] [stdout]     |
[INFO] [stdout] 128 | /     return MetadataKeyValuePair {
[INFO] [stdout] 129 | |       key: END_METADATA,
[INFO] [stdout] 130 | |       value: bits,
[INFO] [stdout] 131 | |     };
[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] 128 ~     MetadataKeyValuePair {
[INFO] [stdout] 129 +       key: END_METADATA,
[INFO] [stdout] 130 +       value: bits,
[INFO] [stdout] 131 ~     }
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/metadata.rs:198:5
[INFO] [stdout]     |
[INFO] [stdout] 198 | /     return MetadataKeyValuePair {
[INFO] [stdout] 199 | |       key,
[INFO] [stdout] 200 | |       value,
[INFO] [stdout] 201 | |     };
[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] 198 ~     MetadataKeyValuePair {
[INFO] [stdout] 199 +       key,
[INFO] [stdout] 200 +       value,
[INFO] [stdout] 201 ~     }
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/metadata.rs:206:5
[INFO] [stdout]     |
[INFO] [stdout] 206 |     return self.key & END_METADATA == END_METADATA;
[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] 206 -     return self.key & END_METADATA == END_METADATA;
[INFO] [stdout] 206 +     self.key & END_METADATA == END_METADATA
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/metadata.rs:211:5
[INFO] [stdout]     |
[INFO] [stdout] 211 |     return self.key >= DICTIONARY_ENTRY && self.key <= MAX_DICTIONARY_ENTRY;
[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] 211 -     return self.key >= DICTIONARY_ENTRY && self.key <= MAX_DICTIONARY_ENTRY;
[INFO] [stdout] 211 +     self.key >= DICTIONARY_ENTRY && self.key <= MAX_DICTIONARY_ENTRY
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/metadata.rs:206:5
[INFO] [stdout]     |
[INFO] [stdout] 206 |     return self.key & END_METADATA == END_METADATA;
[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] 206 -     return self.key & END_METADATA == END_METADATA;
[INFO] [stdout] 206 +     self.key & END_METADATA == END_METADATA
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/metadata.rs:271:7
[INFO] [stdout]     |
[INFO] [stdout] 271 | /       return CharCodePair::new(
[INFO] [stdout] 272 | |         char::from_u32(char_value).unwrap(),
[INFO] [stdout] 273 | |         char_bits,
[INFO] [stdout] 274 | |         char_code,
[INFO] [stdout] 275 | |       );
[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] 271 ~       CharCodePair::new(
[INFO] [stdout] 272 +         char::from_u32(char_value).unwrap(),
[INFO] [stdout] 273 +         char_bits,
[INFO] [stdout] 274 +         char_code,
[INFO] [stdout] 275 ~       )
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/metadata.rs:211:5
[INFO] [stdout]     |
[INFO] [stdout] 211 |     return self.key >= DICTIONARY_ENTRY && self.key <= MAX_DICTIONARY_ENTRY;
[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] 211 -     return self.key >= DICTIONARY_ENTRY && self.key <= MAX_DICTIONARY_ENTRY;
[INFO] [stdout] 211 +     self.key >= DICTIONARY_ENTRY && self.key <= MAX_DICTIONARY_ENTRY
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/metadata.rs:271:7
[INFO] [stdout]     |
[INFO] [stdout] 271 | /       return CharCodePair::new(
[INFO] [stdout] 272 | |         char::from_u32(char_value).unwrap(),
[INFO] [stdout] 273 | |         char_bits,
[INFO] [stdout] 274 | |         char_code,
[INFO] [stdout] 275 | |       );
[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] 271 ~       CharCodePair::new(
[INFO] [stdout] 272 +         char::from_u32(char_value).unwrap(),
[INFO] [stdout] 273 +         char_bits,
[INFO] [stdout] 274 +         char_code,
[INFO] [stdout] 275 ~       )
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/main.rs:54:3
[INFO] [stdout]    |
[INFO] [stdout] 54 |   return 0;
[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] 54 -   return 0;
[INFO] [stdout] 54 +   0
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/main.rs:54:3
[INFO] [stdout]    |
[INFO] [stdout] 54 |   return 0;
[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] 54 -   return 0;
[INFO] [stdout] 54 +   0
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: file opened with `create`, but `truncate` behavior not defined
[INFO] [stdout]   --> src/main.rs:70:6
[INFO] [stdout]    |
[INFO] [stdout] 70 |     .create(true)
[INFO] [stdout]    |      ^^^^^^^^^^^^- help: add: `.truncate(true)`
[INFO] [stdout]    |
[INFO] [stdout]    = help: if you intend to overwrite an existing file entirely, call `.truncate(true)`
[INFO] [stdout]    = help: if you instead know that you may want to keep some parts of the old file, call `.truncate(false)`
[INFO] [stdout]    = help: alternatively, use `.append(true)` to append to the file instead of overwriting it
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#suspicious_open_options
[INFO] [stdout]    = note: `#[warn(clippy::suspicious_open_options)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: file opened with `create`, but `truncate` behavior not defined
[INFO] [stdout]   --> src/main.rs:70:6
[INFO] [stdout]    |
[INFO] [stdout] 70 |     .create(true)
[INFO] [stdout]    |      ^^^^^^^^^^^^- help: add: `.truncate(true)`
[INFO] [stdout]    |
[INFO] [stdout]    = help: if you intend to overwrite an existing file entirely, call `.truncate(true)`
[INFO] [stdout]    = help: if you instead know that you may want to keep some parts of the old file, call `.truncate(false)`
[INFO] [stdout]    = help: alternatively, use `.append(true)` to append to the file instead of overwriting it
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#suspicious_open_options
[INFO] [stdout]    = note: `#[warn(clippy::suspicious_open_options)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: file opened with `create`, but `truncate` behavior not defined
[INFO] [stdout]   --> src/main.rs:92:6
[INFO] [stdout]    |
[INFO] [stdout] 92 |     .create(true)
[INFO] [stdout]    |      ^^^^^^^^^^^^- help: add: `.truncate(true)`
[INFO] [stdout]    |
[INFO] [stdout]    = help: if you intend to overwrite an existing file entirely, call `.truncate(true)`
[INFO] [stdout]    = help: if you instead know that you may want to keep some parts of the old file, call `.truncate(false)`
[INFO] [stdout]    = help: alternatively, use `.append(true)` to append to the file instead of overwriting it
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#suspicious_open_options
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]   --> src/main.rs:96:24
[INFO] [stdout]    |
[INFO] [stdout] 96 |   match file.write_all(&string.as_bytes()) {
[INFO] [stdout]    |                        ^^^^^^^^^^^^^^^^^^ help: change this to: `string.as_bytes()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: file opened with `create`, but `truncate` behavior not defined
[INFO] [stdout]   --> src/main.rs:92:6
[INFO] [stdout]    |
[INFO] [stdout] 92 |     .create(true)
[INFO] [stdout]    |      ^^^^^^^^^^^^- help: add: `.truncate(true)`
[INFO] [stdout]    |
[INFO] [stdout]    = help: if you intend to overwrite an existing file entirely, call `.truncate(true)`
[INFO] [stdout]    = help: if you instead know that you may want to keep some parts of the old file, call `.truncate(false)`
[INFO] [stdout]    = help: alternatively, use `.append(true)` to append to the file instead of overwriting it
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#suspicious_open_options
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]   --> src/main.rs:96:24
[INFO] [stdout]    |
[INFO] [stdout] 96 |   match file.write_all(&string.as_bytes()) {
[INFO] [stdout]    |                        ^^^^^^^^^^^^^^^^^^ help: change this to: `string.as_bytes()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "8a8da90b45bb77c87d224fa905810286d57e7172fb3683cf2d1751a592e10e71", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8a8da90b45bb77c87d224fa905810286d57e7172fb3683cf2d1751a592e10e71", kill_on_drop: false }`
[INFO] [stdout] 8a8da90b45bb77c87d224fa905810286d57e7172fb3683cf2d1751a592e10e71