[INFO] cloning repository https://github.com/nagolove/rust_hello
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/nagolove/rust_hello" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnagolove%2Frust_hello", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnagolove%2Frust_hello'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f062347f36254985e62de513f75adf7afcaf7009
[INFO] checking nagolove/rust_hello against master#db1fb85cff63ad5fffe435e17128f99f9e1d970c for pr-89056
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnagolove%2Frust_hello" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/nagolove/rust_hello on toolchain db1fb85cff63ad5fffe435e17128f99f9e1d970c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/nagolove/rust_hello
[INFO] finished tweaking git repo https://github.com/nagolove/rust_hello
[INFO] tweaked toml for git repo https://github.com/nagolove/rust_hello written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/nagolove/rust_hello already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4531c33e4092890febfcff957987d6995c504e3820fe57d73092c8443cb086ad
[INFO] running `Command { std: "docker" "start" "-a" "4531c33e4092890febfcff957987d6995c504e3820fe57d73092c8443cb086ad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4531c33e4092890febfcff957987d6995c504e3820fe57d73092c8443cb086ad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4531c33e4092890febfcff957987d6995c504e3820fe57d73092c8443cb086ad", kill_on_drop: false }`
[INFO] [stdout] 4531c33e4092890febfcff957987d6995c504e3820fe57d73092c8443cb086ad
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f3564ce4954498867597303a31b4b063818079f17177fa2e5f1bf175c412c76f
[INFO] running `Command { std: "docker" "start" "-a" "f3564ce4954498867597303a31b4b063818079f17177fa2e5f1bf175c412c76f", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.101
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.4
[INFO] [stderr]     Checking rust_hello v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Arc`
[INFO] [stdout]    --> src/main.rs:256:24
[INFO] [stdout]     |
[INFO] [stdout] 256 | use std::sync::{Mutex, Arc};
[INFO] [stdout]     |                        ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Arc`
[INFO] [stdout]    --> src/main.rs:256:24
[INFO] [stdout]     |
[INFO] [stdout] 256 | use std::sync::{Mutex, Arc};
[INFO] [stdout]     |                        ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/main.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let x = 1;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/main.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let x = 1;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/main.rs:46:13
[INFO] [stdout]    |
[INFO] [stdout] 46 |     let mut i: i16 = 1;
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `k`
[INFO] [stdout]   --> src/main.rs:47:9
[INFO] [stdout]    |
[INFO] [stdout] 47 |     let k: i16 = 1;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_k`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ok1`
[INFO] [stdout]   --> src/main.rs:49:9
[INFO] [stdout]    |
[INFO] [stdout] 49 |     let ok1: bool = false;
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_ok1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ch`
[INFO] [stdout]   --> src/main.rs:50:9
[INFO] [stdout]    |
[INFO] [stdout] 50 |     let ch: char = 'a';
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_ch`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ch`
[INFO] [stdout]   --> src/main.rs:51:9
[INFO] [stdout]    |
[INFO] [stdout] 51 |     let ch: i8;
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_ch`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `secret`
[INFO] [stdout]    --> src/main.rs:232:9
[INFO] [stdout]     |
[INFO] [stdout] 232 |     let secret = rand::thread_rng().gen_range(1..11);
[INFO] [stdout]     |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_secret`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `line`
[INFO] [stdout]    --> src/main.rs:233:9
[INFO] [stdout]     |
[INFO] [stdout] 233 |     let line: u32 = line.trim().parse().expect("Should be a number");
[INFO] [stdout]     |         ^^^^ help: if this is intentional, prefix it with an underscore: `_line`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `args`
[INFO] [stdout]    --> src/main.rs:235:9
[INFO] [stdout]     |
[INFO] [stdout] 235 |     let args: Vec<String> = env::args().collect();
[INFO] [stdout]     |         ^^^^ help: if this is intentional, prefix it with an underscore: `_args`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `args`
[INFO] [stdout]    --> src/main.rs:245:9
[INFO] [stdout]     |
[INFO] [stdout] 245 |     let args: Vec<String> = env::args().collect(); 
[INFO] [stdout]     |         ^^^^ help: if this is intentional, prefix it with an underscore: `_args`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `p`
[INFO] [stdout]    --> src/main.rs:310:9
[INFO] [stdout]     |
[INFO] [stdout] 310 |     let p = Person::new();
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_p`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `p`
[INFO] [stdout]    --> src/main.rs:311:9
[INFO] [stdout]     |
[INFO] [stdout] 311 |     let p: Person = Person::new();
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_p`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:46:9
[INFO] [stdout]    |
[INFO] [stdout] 46 |     let mut i: i16 = 1;
[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: `i`
[INFO] [stdout]   --> src/main.rs:46:13
[INFO] [stdout]    |
[INFO] [stdout] 46 |     let mut i: i16 = 1;
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `k`
[INFO] [stdout]   --> src/main.rs:47:9
[INFO] [stdout]    |
[INFO] [stdout] 47 |     let k: i16 = 1;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_k`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ok1`
[INFO] [stdout]   --> src/main.rs:49:9
[INFO] [stdout]    |
[INFO] [stdout] 49 |     let ok1: bool = false;
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_ok1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ch`
[INFO] [stdout]   --> src/main.rs:50:9
[INFO] [stdout]    |
[INFO] [stdout] 50 |     let ch: char = 'a';
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_ch`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ch`
[INFO] [stdout]   --> src/main.rs:51:9
[INFO] [stdout]    |
[INFO] [stdout] 51 |     let ch: i8;
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_ch`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `secret`
[INFO] [stdout]    --> src/main.rs:232:9
[INFO] [stdout]     |
[INFO] [stdout] 232 |     let secret = rand::thread_rng().gen_range(1..11);
[INFO] [stdout]     |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_secret`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `line`
[INFO] [stdout]    --> src/main.rs:233:9
[INFO] [stdout]     |
[INFO] [stdout] 233 |     let line: u32 = line.trim().parse().expect("Should be a number");
[INFO] [stdout]     |         ^^^^ help: if this is intentional, prefix it with an underscore: `_line`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `args`
[INFO] [stdout]    --> src/main.rs:235:9
[INFO] [stdout]     |
[INFO] [stdout] 235 |     let args: Vec<String> = env::args().collect();
[INFO] [stdout]     |         ^^^^ help: if this is intentional, prefix it with an underscore: `_args`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `args`
[INFO] [stdout]    --> src/main.rs:245:9
[INFO] [stdout]     |
[INFO] [stdout] 245 |     let args: Vec<String> = env::args().collect(); 
[INFO] [stdout]     |         ^^^^ help: if this is intentional, prefix it with an underscore: `_args`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `p`
[INFO] [stdout]    --> src/main.rs:310:9
[INFO] [stdout]     |
[INFO] [stdout] 310 |     let p = Person::new();
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_p`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `p`
[INFO] [stdout]    --> src/main.rs:311:9
[INFO] [stdout]     |
[INFO] [stdout] 311 |     let p: Person = Person::new();
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_p`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:46:9
[INFO] [stdout]    |
[INFO] [stdout] 46 |     let mut i: i16 = 1;
[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: function is never used: `sub`
[INFO] [stdout]   --> src/main.rs:37:35
[INFO] [stdout]    |
[INFO] [stdout] 37 |             println!("small"); fn sub(){}
[INFO] [stdout]    |                                   ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `fun9`
[INFO] [stdout]    --> src/main.rs:155:4
[INFO] [stdout]     |
[INFO] [stdout] 155 | fn fun9() {
[INFO] [stdout]     |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `abs`
[INFO] [stdout]    --> src/main.rs:183:4
[INFO] [stdout]     |
[INFO] [stdout] 183 | fn abs(x: f64) -> f64 {
[INFO] [stdout]     |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `clamp`
[INFO] [stdout]    --> src/main.rs:191:4
[INFO] [stdout]     |
[INFO] [stdout] 191 | fn clamp(x: f64, x1: f64, x2: f64) -> f64 {
[INFO] [stdout]     |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `factorial`
[INFO] [stdout]    --> src/main.rs:201:4
[INFO] [stdout]     |
[INFO] [stdout] 201 | fn factorial(n: u64) -> u64 {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `fun11`
[INFO] [stdout]    --> src/main.rs:228:4
[INFO] [stdout]     |
[INFO] [stdout] 228 | fn fun11() {
[INFO] [stdout]     |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Node`
[INFO] [stdout]    --> src/main.rs:258:8
[INFO] [stdout]     |
[INFO] [stdout] 258 | struct Node {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]    --> src/main.rs:267:8
[INFO] [stdout]     |
[INFO] [stdout] 267 |     fn new(name: &String) -> Node {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `bar`
[INFO] [stdout]    --> src/main.rs:277:8
[INFO] [stdout]     |
[INFO] [stdout] 277 |     fn bar(&self) -> i8 {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]    --> src/main.rs:296:8
[INFO] [stdout]     |
[INFO] [stdout] 296 |     fn new() -> Person {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `fun12`
[INFO] [stdout]    --> src/main.rs:309:4
[INFO] [stdout]     |
[INFO] [stdout] 309 | fn fun12() {
[INFO] [stdout]     |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:279:9
[INFO] [stdout]     |
[INFO] [stdout] 279 |         self.mutex.lock();
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:281:9
[INFO] [stdout]     |
[INFO] [stdout] 281 |         self.mutex.lock();
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `sub`
[INFO] [stdout]   --> src/main.rs:37:35
[INFO] [stdout]    |
[INFO] [stdout] 37 |             println!("small"); fn sub(){}
[INFO] [stdout]    |                                   ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `fun9`
[INFO] [stdout]    --> src/main.rs:155:4
[INFO] [stdout]     |
[INFO] [stdout] 155 | fn fun9() {
[INFO] [stdout]     |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `abs`
[INFO] [stdout]    --> src/main.rs:183:4
[INFO] [stdout]     |
[INFO] [stdout] 183 | fn abs(x: f64) -> f64 {
[INFO] [stdout]     |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `clamp`
[INFO] [stdout]    --> src/main.rs:191:4
[INFO] [stdout]     |
[INFO] [stdout] 191 | fn clamp(x: f64, x1: f64, x2: f64) -> f64 {
[INFO] [stdout]     |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `factorial`
[INFO] [stdout]    --> src/main.rs:201:4
[INFO] [stdout]     |
[INFO] [stdout] 201 | fn factorial(n: u64) -> u64 {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `fun11`
[INFO] [stdout]    --> src/main.rs:228:4
[INFO] [stdout]     |
[INFO] [stdout] 228 | fn fun11() {
[INFO] [stdout]     |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Node`
[INFO] [stdout]    --> src/main.rs:258:8
[INFO] [stdout]     |
[INFO] [stdout] 258 | struct Node {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]    --> src/main.rs:267:8
[INFO] [stdout]     |
[INFO] [stdout] 267 |     fn new(name: &String) -> Node {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `bar`
[INFO] [stdout]    --> src/main.rs:277:8
[INFO] [stdout]     |
[INFO] [stdout] 277 |     fn bar(&self) -> i8 {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]    --> src/main.rs:296:8
[INFO] [stdout]     |
[INFO] [stdout] 296 |     fn new() -> Person {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `fun12`
[INFO] [stdout]    --> src/main.rs:309:4
[INFO] [stdout]     |
[INFO] [stdout] 309 | fn fun12() {
[INFO] [stdout]     |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 27 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:279:9
[INFO] [stdout]     |
[INFO] [stdout] 279 |         self.mutex.lock();
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:281:9
[INFO] [stdout]     |
[INFO] [stdout] 281 |         self.mutex.lock();
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 27 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 31.65s
[INFO] running `Command { std: "docker" "inspect" "f3564ce4954498867597303a31b4b063818079f17177fa2e5f1bf175c412c76f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f3564ce4954498867597303a31b4b063818079f17177fa2e5f1bf175c412c76f", kill_on_drop: false }`
[INFO] [stdout] f3564ce4954498867597303a31b4b063818079f17177fa2e5f1bf175c412c76f