[INFO] cloning repository https://github.com/load28/awesome_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/load28/awesome_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fload28%2Fawesome_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fload28%2Fawesome_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 105b4e9b96688fb969a4c908cb3da602436bfdd6
[INFO] checking load28/awesome_rust against master#9748d87dc70a9a6725c5dbd76ce29d04752b4f90 for pr-144156
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fload28%2Fawesome_rust" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/load28/awesome_rust
[INFO] finished tweaking git repo https://github.com/load28/awesome_rust
[INFO] tweaked toml for git repo https://github.com/load28/awesome_rust written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/load28/awesome_rust on toolchain 9748d87dc70a9a6725c5dbd76ce29d04752b4f90
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9748d87dc70a9a6725c5dbd76ce29d04752b4f90" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/load28/awesome_rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9748d87dc70a9a6725c5dbd76ce29d04752b4f90" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+9748d87dc70a9a6725c5dbd76ce29d04752b4f90" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 12b6d250d777d22f16df643f546560ade142f4d1c744b29fc296dc612048f131
[INFO] running `Command { std: "docker" "start" "-a" "12b6d250d777d22f16df643f546560ade142f4d1c744b29fc296dc612048f131", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "12b6d250d777d22f16df643f546560ade142f4d1c744b29fc296dc612048f131", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "12b6d250d777d22f16df643f546560ade142f4d1c744b29fc296dc612048f131", kill_on_drop: false }`
[INFO] [stdout] 12b6d250d777d22f16df643f546560ade142f4d1c744b29fc296dc612048f131
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+9748d87dc70a9a6725c5dbd76ce29d04752b4f90" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3cea02c4af96f2ee375438ecdde14dd0bfcc43fbbfbaa4f89db025ef4e32493c
[INFO] running `Command { std: "docker" "start" "-a" "3cea02c4af96f2ee375438ecdde14dd0bfcc43fbbfbaa4f89db025ef4e32493c", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.148
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.17
[INFO] [stderr]     Checking getrandom v0.2.10
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking untitled1 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/collection/vector.rs:43:9
[INFO] [stdout]    |
[INFO] [stdout] 43 |     let mut v2 = vec![1, 2, 3, 4, 5];
[INFO] [stdout]    |         ----^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/collection/vector.rs:43:9
[INFO] [stdout]    |
[INFO] [stdout] 43 |     let mut v2 = vec![1, 2, 3, 4, 5];
[INFO] [stdout]    |         ----^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]  --> src/ownership/mod.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let s = "hello"; // 스트링 리터럴 (문자열은 고정된 크기 - 컴파일 타입에서 고정된 사이즈를 가지고 있기 때문에 스택에 저장 !, String 타입은 가변성을 지니므로 힙에 저장 - 컴파일 타입에 크기를 알 수 없음)
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]  --> src/ownership/mod.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let s = "hello"; // 스트링 리터럴 (문자열은 고정된 크기 - 컴파일 타입에서 고정된 사이즈를 가지고 있기 때문에 스택에 저장 !, String 타입은 가변성을 지니므로 힙에 저장 - 컴파일 타입에 크기를 알 수 없음)
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s4`
[INFO] [stdout]   --> src/ownership/mod.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let s4 = s3.clone(); // 클론을 통해서 깊은 복사를 수행 할 수 있음
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_s4`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s4`
[INFO] [stdout]   --> src/ownership/mod.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let s4 = s3.clone(); // 클론을 통해서 깊은 복사를 수행 할 수 있음
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_s4`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]   --> src/ownership/mod.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |     let y = x;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]   --> src/ownership/mod.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |     let y = x;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> src/ownership/mod.rs:79:9
[INFO] [stdout]    |
[INFO] [stdout] 79 |     let b = &a[1..]; // 스트링 리터럴이 불변인 이유는 불변 참조자를 통해서 슬라이스가 만들어지기 때문이다
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> src/ownership/mod.rs:79:9
[INFO] [stdout]    |
[INFO] [stdout] 79 |     let b = &a[1..]; // 스트링 리터럴이 불변인 이유는 불변 참조자를 통해서 슬라이스가 만들어지기 때문이다
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `none`
[INFO] [stdout]   --> src/rust_enum/mod.rs:61:9
[INFO] [stdout]    |
[INFO] [stdout] 61 |     let none: Option<i32> = None;
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_none`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `none`
[INFO] [stdout]   --> src/rust_enum/mod.rs:61:9
[INFO] [stdout]    |
[INFO] [stdout] 61 |     let none: Option<i32> = None;
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_none`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]  --> src/basic/mod.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn run() {
[INFO] [stdout]   |        ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `function` is never used
[INFO] [stdout]   --> src/basic/mod.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn function(x: i32) -> i32 {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `condition` is never used
[INFO] [stdout]   --> src/basic/mod.rs:29:4
[INFO] [stdout]    |
[INFO] [stdout] 29 | fn condition() {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `repeat` is never used
[INFO] [stdout]   --> src/basic/mod.rs:47:4
[INFO] [stdout]    |
[INFO] [stdout] 47 | fn repeat() {
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]  --> src/ownership/mod.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn run() {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ownership` is never used
[INFO] [stdout]  --> src/ownership/mod.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn ownership() {
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `take_ownership` is never used
[INFO] [stdout]   --> src/ownership/mod.rs:47:4
[INFO] [stdout]    |
[INFO] [stdout] 47 | fn take_ownership(some: String) -> (String, i32) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]  --> src/basic/mod.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn run() {
[INFO] [stdout]   |        ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `borrowing_fun` is never used
[INFO] [stdout]   --> src/ownership/mod.rs:58:4
[INFO] [stdout]    |
[INFO] [stdout] 58 | fn borrowing_fun(some: &String) -> usize {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `mut_fun` is never used
[INFO] [stdout]   --> src/ownership/mod.rs:64:4
[INFO] [stdout]    |
[INFO] [stdout] 64 | fn mut_fun(some: &mut String) {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `function` is never used
[INFO] [stdout]   --> src/basic/mod.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn function(x: i32) -> i32 {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `slice` is never used
[INFO] [stdout]   --> src/ownership/mod.rs:70:4
[INFO] [stdout]    |
[INFO] [stdout] 70 | fn slice() {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `condition` is never used
[INFO] [stdout]   --> src/basic/mod.rs:29:4
[INFO] [stdout]    |
[INFO] [stdout] 29 | fn condition() {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `slice_fn` is never used
[INFO] [stdout]   --> src/ownership/mod.rs:83:4
[INFO] [stdout]    |
[INFO] [stdout] 83 | fn slice_fn(str: &str) {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `error_handler` is never used
[INFO] [stdout]   --> src/ownership/mod.rs:87:4
[INFO] [stdout]    |
[INFO] [stdout] 87 | fn error_handler() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `repeat` is never used
[INFO] [stdout]   --> src/basic/mod.rs:47:4
[INFO] [stdout]    |
[INFO] [stdout] 47 | fn repeat() {
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]  --> src/ownership/mod.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn run() {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `default_str` is never used
[INFO] [stdout]   --> src/ownership/mod.rs:93:4
[INFO] [stdout]    |
[INFO] [stdout] 93 | fn default_str(num_str: &str) -> i32 {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ownership` is never used
[INFO] [stdout]  --> src/ownership/mod.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn ownership() {
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `IpAddrKind` is never used
[INFO] [stdout]  --> src/rust_enum/mod.rs:2:6
[INFO] [stdout]   |
[INFO] [stdout] 2 | enum IpAddrKind {
[INFO] [stdout]   |      ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `take_ownership` is never used
[INFO] [stdout]   --> src/ownership/mod.rs:47:4
[INFO] [stdout]    |
[INFO] [stdout] 47 | fn take_ownership(some: String) -> (String, i32) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `IpAddr` is never constructed
[INFO] [stdout]  --> src/rust_enum/mod.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | struct IpAddr {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `borrowing_fun` is never used
[INFO] [stdout]   --> src/ownership/mod.rs:58:4
[INFO] [stdout]    |
[INFO] [stdout] 58 | fn borrowing_fun(some: &String) -> usize {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/rust_enum/mod.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `rust_enum` is never used
[INFO] [stdout]   --> src/rust_enum/mod.rs:17:4
[INFO] [stdout]    |
[INFO] [stdout] 17 | fn rust_enum() {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `mut_fun` is never used
[INFO] [stdout]   --> src/ownership/mod.rs:64:4
[INFO] [stdout]    |
[INFO] [stdout] 64 | fn mut_fun(some: &mut String) {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `slice` is never used
[INFO] [stdout]   --> src/ownership/mod.rs:70:4
[INFO] [stdout]    |
[INFO] [stdout] 70 | fn slice() {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_ipAddr` is never used
[INFO] [stdout]   --> src/rust_enum/mod.rs:27:4
[INFO] [stdout]    |
[INFO] [stdout] 27 | fn get_ipAddr() -> IpAddrKind {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_ip` is never used
[INFO] [stdout]   --> src/rust_enum/mod.rs:32:4
[INFO] [stdout]    |
[INFO] [stdout] 32 | fn get_ip() -> IpAddr {
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `slice_fn` is never used
[INFO] [stdout]   --> src/ownership/mod.rs:83:4
[INFO] [stdout]    |
[INFO] [stdout] 83 | fn slice_fn(str: &str) {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `error_handler` is never used
[INFO] [stdout]   --> src/ownership/mod.rs:87:4
[INFO] [stdout]    |
[INFO] [stdout] 87 | fn error_handler() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `RGB` is never used
[INFO] [stdout]   --> src/rust_enum/mod.rs:40:6
[INFO] [stdout]    |
[INFO] [stdout] 40 | enum RGB {
[INFO] [stdout]    |      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `default_str` is never used
[INFO] [stdout]   --> src/ownership/mod.rs:93:4
[INFO] [stdout]    |
[INFO] [stdout] 93 | fn default_str(num_str: &str) -> i32 {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_green` is never used
[INFO] [stdout]   --> src/rust_enum/mod.rs:48:8
[INFO] [stdout]    |
[INFO] [stdout] 47 | impl RGB {
[INFO] [stdout]    | -------- method in this implementation
[INFO] [stdout] 48 |     fn get_green(&self) {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `IpAddrKind` is never used
[INFO] [stdout]  --> src/rust_enum/mod.rs:2:6
[INFO] [stdout]   |
[INFO] [stdout] 2 | enum IpAddrKind {
[INFO] [stdout]   |      ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_green` is never used
[INFO] [stdout]   --> src/rust_enum/mod.rs:53:4
[INFO] [stdout]    |
[INFO] [stdout] 53 | fn get_green() {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `IpAddr` is never constructed
[INFO] [stdout]  --> src/rust_enum/mod.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | struct IpAddr {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `option` is never used
[INFO] [stdout]   --> src/rust_enum/mod.rs:58:4
[INFO] [stdout]    |
[INFO] [stdout] 58 | fn option() {
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/rust_enum/mod.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_option` is never used
[INFO] [stdout]   --> src/rust_enum/mod.rs:68:4
[INFO] [stdout]    |
[INFO] [stdout] 68 | fn get_option(num: Option<String>) -> Option<String> {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `rust_enum` is never used
[INFO] [stdout]   --> src/rust_enum/mod.rs:17:4
[INFO] [stdout]    |
[INFO] [stdout] 17 | fn rust_enum() {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `User` is never constructed
[INFO] [stdout]  --> src/rust_struct/mod.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct User {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_ipAddr` is never used
[INFO] [stdout]   --> src/rust_enum/mod.rs:27:4
[INFO] [stdout]    |
[INFO] [stdout] 27 | fn get_ipAddr() -> IpAddrKind {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]  --> src/rust_struct/mod.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn run() {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_ip` is never used
[INFO] [stdout]   --> src/rust_enum/mod.rs:32:4
[INFO] [stdout]    |
[INFO] [stdout] 32 | fn get_ip() -> IpAddr {
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_user` is never used
[INFO] [stdout]   --> src/rust_struct/mod.rs:30:4
[INFO] [stdout]    |
[INFO] [stdout] 30 | fn get_user(name: String, age: i16) -> User {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `sum_object` is never used
[INFO] [stdout]   --> src/rust_struct/mod.rs:39:4
[INFO] [stdout]    |
[INFO] [stdout] 39 | fn sum_object(a: &User, b: &User) -> User {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `RGB` is never used
[INFO] [stdout]   --> src/rust_enum/mod.rs:40:6
[INFO] [stdout]    |
[INFO] [stdout] 40 | enum RGB {
[INFO] [stdout]    |      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `sum_age`, `get_age`, and `get_new_name` are never used
[INFO] [stdout]   --> src/rust_struct/mod.rs:51:8
[INFO] [stdout]    |
[INFO] [stdout] 50 | impl User {
[INFO] [stdout]    | --------- methods in this implementation
[INFO] [stdout] 51 |     fn sum_age(&self, age: i16) -> i16 {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 55 |     fn get_age(&self) -> i16 {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 60 |     fn get_new_name(&self) -> String {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_green` is never used
[INFO] [stdout]   --> src/rust_enum/mod.rs:48:8
[INFO] [stdout]    |
[INFO] [stdout] 47 | impl RGB {
[INFO] [stdout]    | -------- method in this implementation
[INFO] [stdout] 48 |     fn get_green(&self) {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_green` is never used
[INFO] [stdout]   --> src/rust_enum/mod.rs:53:4
[INFO] [stdout]    |
[INFO] [stdout] 53 | fn get_green() {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `option` is never used
[INFO] [stdout]   --> src/rust_enum/mod.rs:58:4
[INFO] [stdout]    |
[INFO] [stdout] 58 | fn option() {
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused arithmetic operation that must be used
[INFO] [stdout]   --> src/basic/mod.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     10 + 1; // 더하기 연산도 하나의 표현식이기 때문에 결과를 반환한다
[INFO] [stdout]    |     ^^^^^^ the arithmetic operation produces a value
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let _ = 10 + 1; // 더하기 연산도 하나의 표현식이기 때문에 결과를 반환한다
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_option` is never used
[INFO] [stdout]   --> src/rust_enum/mod.rs:68:4
[INFO] [stdout]    |
[INFO] [stdout] 68 | fn get_option(num: Option<String>) -> Option<String> {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `User` is never constructed
[INFO] [stdout]  --> src/rust_struct/mod.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct User {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]  --> src/rust_struct/mod.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn run() {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_user` is never used
[INFO] [stdout]   --> src/rust_struct/mod.rs:30:4
[INFO] [stdout]    |
[INFO] [stdout] 30 | fn get_user(name: String, age: i16) -> User {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `sum_object` is never used
[INFO] [stdout]   --> src/rust_struct/mod.rs:39:4
[INFO] [stdout]    |
[INFO] [stdout] 39 | fn sum_object(a: &User, b: &User) -> User {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `sum_age`, `get_age`, and `get_new_name` are never used
[INFO] [stdout]   --> src/rust_struct/mod.rs:51:8
[INFO] [stdout]    |
[INFO] [stdout] 50 | impl User {
[INFO] [stdout]    | --------- methods in this implementation
[INFO] [stdout] 51 |     fn sum_age(&self, age: i16) -> i16 {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 55 |     fn get_age(&self) -> i16 {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 60 |     fn get_new_name(&self) -> String {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused arithmetic operation that must be used
[INFO] [stdout]   --> src/basic/mod.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     10 + 1; // 더하기 연산도 하나의 표현식이기 때문에 결과를 반환한다
[INFO] [stdout]    |     ^^^^^^ the arithmetic operation produces a value
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let _ = 10 + 1; // 더하기 연산도 하나의 표현식이기 때문에 결과를 반환한다
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_ipAddr` should have a snake case name
[INFO] [stdout]   --> src/rust_enum/mod.rs:27:4
[INFO] [stdout]    |
[INFO] [stdout] 27 | fn get_ipAddr() -> IpAddrKind {
[INFO] [stdout]    |    ^^^^^^^^^^ help: convert the identifier to snake case: `get_ip_addr`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_ipAddr` should have a snake case name
[INFO] [stdout]   --> src/rust_enum/mod.rs:27:4
[INFO] [stdout]    |
[INFO] [stdout] 27 | fn get_ipAddr() -> IpAddrKind {
[INFO] [stdout]    |    ^^^^^^^^^^ help: convert the identifier to snake case: `get_ip_addr`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.36s
[INFO] running `Command { std: "docker" "inspect" "3cea02c4af96f2ee375438ecdde14dd0bfcc43fbbfbaa4f89db025ef4e32493c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3cea02c4af96f2ee375438ecdde14dd0bfcc43fbbfbaa4f89db025ef4e32493c", kill_on_drop: false }`
[INFO] [stdout] 3cea02c4af96f2ee375438ecdde14dd0bfcc43fbbfbaa4f89db025ef4e32493c