[INFO] cloning repository https://github.com/yussifm/my_rust_learning_repo
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/yussifm/my_rust_learning_repo" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyussifm%2Fmy_rust_learning_repo", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyussifm%2Fmy_rust_learning_repo'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bce7d78ec4eb834289d73009cbdaa0773f7bf5b7
[INFO] checking yussifm/my_rust_learning_repo against master#1f12b9b0fdbe735968ac002792a720f0ba4faca6 for crater-rollup-uwu
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyussifm%2Fmy_rust_learning_repo" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/yussifm/my_rust_learning_repo on toolchain 1f12b9b0fdbe735968ac002792a720f0ba4faca6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/yussifm/my_rust_learning_repo
[INFO] finished tweaking git repo https://github.com/yussifm/my_rust_learning_repo
[INFO] tweaked toml for git repo https://github.com/yussifm/my_rust_learning_repo written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/yussifm/my_rust_learning_repo 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" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8e4ab65894b77b87ae9e95735ab54d1adcbda83004178ff4daddb80750efe537
[INFO] running `Command { std: "docker" "start" "-a" "8e4ab65894b77b87ae9e95735ab54d1adcbda83004178ff4daddb80750efe537", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8e4ab65894b77b87ae9e95735ab54d1adcbda83004178ff4daddb80750efe537", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8e4ab65894b77b87ae9e95735ab54d1adcbda83004178ff4daddb80750efe537", kill_on_drop: false }`
[INFO] [stdout] 8e4ab65894b77b87ae9e95735ab54d1adcbda83004178ff4daddb80750efe537
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4fd784546b03080669e0e4010312cc98c92bad861c96cdfed8d8353f92c65acc
[INFO] running `Command { std: "docker" "start" "-a" "4fd784546b03080669e0e4010312cc98c92bad861c96cdfed8d8353f92c65acc", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.150
[INFO] [stderr]     Checking adder v0.1.0 (/opt/rustwide/workdir/adder)
[INFO] [stderr]     Checking getrandom v0.2.11
[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 hello_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `add_one_v2`
[INFO] [stdout]   --> src/closures_in_rs.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let add_one_v2 = |x: u32| -> u32 { x + 1 };
[INFO] [stdout]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_add_one_v2`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `add_one_v2`
[INFO] [stdout]   --> src/closures_in_rs.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let add_one_v2 = |x: u32| -> u32 { x + 1 };
[INFO] [stdout]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_add_one_v2`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v3`
[INFO] [stdout]   --> src/common_collections_rs.rs:66:9
[INFO] [stdout]    |
[INFO] [stdout] 66 |     let v3 = vec![
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_v3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v3`
[INFO] [stdout]   --> src/common_collections_rs.rs:66:9
[INFO] [stdout]    |
[INFO] [stdout] 66 |     let v3 = vec![
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_v3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s11`
[INFO] [stdout]    --> src/common_collections_rs.rs:149:9
[INFO] [stdout]     |
[INFO] [stdout] 149 |     let s11 = &hello[0..4];
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_s11`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s11`
[INFO] [stdout]    --> src/common_collections_rs.rs:149:9
[INFO] [stdout]     |
[INFO] [stdout] 149 |     let s11 = &hello[0..4];
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_s11`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/enums_in_rust.rs:51:9
[INFO] [stdout]    |
[INFO] [stdout] 51 |     let x: i8 = 5;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/enums_in_rust.rs:51:9
[INFO] [stdout]    |
[INFO] [stdout] 51 |     let x: i8 = 5;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]   --> src/enums_in_rust.rs:52:9
[INFO] [stdout]    |
[INFO] [stdout] 52 |     let y: Option<i8> = Some(5);
[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/enums_in_rust.rs:52:9
[INFO] [stdout]    |
[INFO] [stdout] 52 |     let y: Option<i8> = Some(5);
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `six`
[INFO] [stdout]   --> src/enums_in_rust.rs:79:9
[INFO] [stdout]    |
[INFO] [stdout] 79 |     let six = plus_one(five);
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_six`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `six`
[INFO] [stdout]   --> src/enums_in_rust.rs:79:9
[INFO] [stdout]    |
[INFO] [stdout] 79 |     let six = plus_one(five);
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_six`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `none`
[INFO] [stdout]   --> src/enums_in_rust.rs:80:9
[INFO] [stdout]    |
[INFO] [stdout] 80 |     let none = plus_one(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/enums_in_rust.rs:80:9
[INFO] [stdout]    |
[INFO] [stdout] 80 |     let none = plus_one(None);
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_none`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `file_result`
[INFO] [stdout]   --> src/handling_errors_in_rs.rs:39:9
[INFO] [stdout]    |
[INFO] [stdout] 39 |     let file_result = match op_file {
[INFO] [stdout]    |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_file_result`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `greeting_file`
[INFO] [stdout]   --> src/handling_errors_in_rs.rs:54:9
[INFO] [stdout]    |
[INFO] [stdout] 54 |     let greeting_file = File::open("hello.txt").unwrap_or_else(|error| {
[INFO] [stdout]    |         ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_greeting_file`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `file_result`
[INFO] [stdout]   --> src/handling_errors_in_rs.rs:39:9
[INFO] [stdout]    |
[INFO] [stdout] 39 |     let file_result = match op_file {
[INFO] [stdout]    |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_file_result`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `greeting_file`
[INFO] [stdout]   --> src/handling_errors_in_rs.rs:54:9
[INFO] [stdout]    |
[INFO] [stdout] 54 |     let greeting_file = File::open("hello.txt").unwrap_or_else(|error| {
[INFO] [stdout]    |         ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_greeting_file`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s5`
[INFO] [stdout]   --> src/ownership_in_rust.rs:42:9
[INFO] [stdout]    |
[INFO] [stdout] 42 |     let s5 = gives_ownership(); // gives_ownership moves its return value into s5
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_s5`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s7`
[INFO] [stdout]   --> src/ownership_in_rust.rs:46:9
[INFO] [stdout]    |
[INFO] [stdout] 46 |     let s7 = takes_and_gives_back(s6); // s6 is moved into
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_s7`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s5`
[INFO] [stdout]   --> src/ownership_in_rust.rs:42:9
[INFO] [stdout]    |
[INFO] [stdout] 42 |     let s5 = gives_ownership(); // gives_ownership moves its return value into s5
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_s5`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s7`
[INFO] [stdout]   --> src/ownership_in_rust.rs:46:9
[INFO] [stdout]    |
[INFO] [stdout] 46 |     let s7 = takes_and_gives_back(s6); // s6 is moved into
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_s7`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/ownership_in_rust.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let mut s2 = String::from("Hello");
[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/ownership_in_rust.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let mut s2 = String::from("Hello");
[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: `list`
[INFO] [stdout]   --> src/smart_pointers_in_rs.rs:58:9
[INFO] [stdout]    |
[INFO] [stdout] 58 |     let list = List::Cons(
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_list`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `list`
[INFO] [stdout]   --> src/smart_pointers_in_rs.rs:58:9
[INFO] [stdout]    |
[INFO] [stdout] 58 |     let list = List::Cons(
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_list`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `subject`
[INFO] [stdout]   --> src/structures_in_rust.rs:38:9
[INFO] [stdout]    |
[INFO] [stdout] 38 |     let subject = AlwaysEqual;
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_subject`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `subject`
[INFO] [stdout]   --> src/structures_in_rust.rs:38:9
[INFO] [stdout]    |
[INFO] [stdout] 38 |     let subject = AlwaysEqual;
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_subject`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `area` is never used
[INFO] [stdout]   --> src/area_of_circle.rs:61:8
[INFO] [stdout]    |
[INFO] [stdout] 60 | impl Rectangle {
[INFO] [stdout]    | -------------- method in this implementation
[INFO] [stdout] 61 |     fn area(&self) -> u32 {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `can_hold` is never used
[INFO] [stdout]   --> src/area_of_circle.rs:66:8
[INFO] [stdout]    |
[INFO] [stdout] 65 | impl Rectangle {
[INFO] [stdout]    | -------------- method in this implementation
[INFO] [stdout] 66 |     fn can_hold(&self, other: &Rectangle) -> bool {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `height` is never read
[INFO] [stdout]  --> src/closures_in_rs.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Rectangle {
[INFO] [stdout]   |        --------- field in this struct
[INFO] [stdout] 3 |     width: u32,
[INFO] [stdout] 4 |     height: u32,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Rectangle` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add_one_v1` is never used
[INFO] [stdout]   --> src/closures_in_rs.rs:28:8
[INFO] [stdout]    |
[INFO] [stdout] 28 |     fn add_one_v1(x: u32) -> u32 {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Shoe` is never constructed
[INFO] [stdout]    --> src/closures_in_rs.rs:106:8
[INFO] [stdout]     |
[INFO] [stdout] 106 | struct Shoe {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `shoes_in_size` is never used
[INFO] [stdout]    --> src/closures_in_rs.rs:110:4
[INFO] [stdout]     |
[INFO] [stdout] 110 | fn shoes_in_size(shoes: Vec<Shoe>, shoe_size: u32) -> Vec<Shoe> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/common_collections_rs.rs:62:13
[INFO] [stdout]    |
[INFO] [stdout] 62 |         Int(i32),
[INFO] [stdout]    |         --- ^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         field in this variant
[INFO] [stdout]    |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 62 |         Int(()),
[INFO] [stdout]    |             ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `area` is never used
[INFO] [stdout]   --> src/area_of_circle.rs:61:8
[INFO] [stdout]    |
[INFO] [stdout] 60 | impl Rectangle {
[INFO] [stdout]    | -------------- method in this implementation
[INFO] [stdout] 61 |     fn area(&self) -> u32 {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/common_collections_rs.rs:63:15
[INFO] [stdout]    |
[INFO] [stdout] 63 |         Float(f32),
[INFO] [stdout]    |         ----- ^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         field in this variant
[INFO] [stdout]    |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 63 |         Float(()),
[INFO] [stdout]    |               ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `can_hold` is never used
[INFO] [stdout]   --> src/area_of_circle.rs:66:8
[INFO] [stdout]    |
[INFO] [stdout] 65 | impl Rectangle {
[INFO] [stdout]    | -------------- method in this implementation
[INFO] [stdout] 66 |     fn can_hold(&self, other: &Rectangle) -> bool {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/common_collections_rs.rs:64:14
[INFO] [stdout]    |
[INFO] [stdout] 64 |         Text(String),
[INFO] [stdout]    |         ---- ^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         field in this variant
[INFO] [stdout]    |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 64 |         Text(()),
[INFO] [stdout]    |              ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/enums_in_rust.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 |     V4(String),
[INFO] [stdout]   |     -- ^^^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `IpAddressKind` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 6 |     V4(()),
[INFO] [stdout]   |        ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `height` is never read
[INFO] [stdout]  --> src/closures_in_rs.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Rectangle {
[INFO] [stdout]   |        --------- field in this struct
[INFO] [stdout] 3 |     width: u32,
[INFO] [stdout] 4 |     height: u32,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Rectangle` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add_one_v1` is never used
[INFO] [stdout]   --> src/closures_in_rs.rs:28:8
[INFO] [stdout]    |
[INFO] [stdout] 28 |     fn add_one_v1(x: u32) -> u32 {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Shoe` is never constructed
[INFO] [stdout]    --> src/closures_in_rs.rs:106:8
[INFO] [stdout]     |
[INFO] [stdout] 106 | struct Shoe {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/enums_in_rust.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 |     V6(String),
[INFO] [stdout]   |     -- ^^^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `IpAddressKind` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 7 |     V6(()),
[INFO] [stdout]   |        ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `shoes_in_size` is never used
[INFO] [stdout]    --> src/closures_in_rs.rs:110:4
[INFO] [stdout]     |
[INFO] [stdout] 110 | fn shoes_in_size(shoes: Vec<Shoe>, shoe_size: u32) -> Vec<Shoe> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Coin` is never used
[INFO] [stdout]   --> src/enums_in_rust.rs:24:6
[INFO] [stdout]    |
[INFO] [stdout] 24 | enum Coin {
[INFO] [stdout]    |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/common_collections_rs.rs:62:13
[INFO] [stdout]    |
[INFO] [stdout] 62 |         Int(i32),
[INFO] [stdout]    |         --- ^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         field in this variant
[INFO] [stdout]    |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 62 |         Int(()),
[INFO] [stdout]    |             ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/enums_in_rust.rs:34:11
[INFO] [stdout]    |
[INFO] [stdout] 34 |     Speak(String),              //  includes a single String .
[INFO] [stdout]    |     ----- ^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 34 |     Speak(()),              //  includes a single String .
[INFO] [stdout]    |           ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/common_collections_rs.rs:63:15
[INFO] [stdout]    |
[INFO] [stdout] 63 |         Float(f32),
[INFO] [stdout]    |         ----- ^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         field in this variant
[INFO] [stdout]    |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 63 |         Float(()),
[INFO] [stdout]    |               ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Quit`, `Move`, and `ChangeColor` are never constructed
[INFO] [stdout]   --> src/enums_in_rust.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 31 | pub enum Message {
[INFO] [stdout]    |          ------- variants in this enum
[INFO] [stdout] 32 |     Quit,                       //  has no data associated with it at all.
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 33 |     Move { x: u32, y: u32 },    // has named fields, like a struct does.
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 34 |     Speak(String),              //  includes a single String .
[INFO] [stdout] 35 |     ChangeColor(i32, i32, i32), // includes three i32 values
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/common_collections_rs.rs:64:14
[INFO] [stdout]    |
[INFO] [stdout] 64 |         Text(String),
[INFO] [stdout]    |         ---- ^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         field in this variant
[INFO] [stdout]    |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 64 |         Text(()),
[INFO] [stdout]    |              ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `value_in_cents` is never used
[INFO] [stdout]   --> src/enums_in_rust.rs:63:8
[INFO] [stdout]    |
[INFO] [stdout] 63 |     fn value_in_cents(coin: Coin) -> u8 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `route` is never used
[INFO] [stdout]   --> src/enums_in_rust.rs:95:4
[INFO] [stdout]    |
[INFO] [stdout] 95 | fn route(ip_kind: &IpAddressKind) -> &IpAddressKind {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `x` and `y` are never read
[INFO] [stdout]  --> src/generics_traaits_in_rs.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct Point<T> {
[INFO] [stdout]   |            ----- fields in this struct
[INFO] [stdout] 4 |     pub x: T,
[INFO] [stdout]   |         ^
[INFO] [stdout] 5 |     pub y: T,
[INFO] [stdout]   |         ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Point` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/enums_in_rust.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 |     V4(String),
[INFO] [stdout]   |     -- ^^^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `IpAddressKind` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 6 |     V4(()),
[INFO] [stdout]   |        ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `x` is never used
[INFO] [stdout]   --> src/generics_traaits_in_rs.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | impl<T> Point<T> {
[INFO] [stdout]    | ---------------- method in this implementation
[INFO] [stdout] 11 |     fn x(&self) -> &T {
[INFO] [stdout]    |        ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/enums_in_rust.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 |     V6(String),
[INFO] [stdout]   |     -- ^^^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `IpAddressKind` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 7 |     V6(()),
[INFO] [stdout]   |        ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `x` and `y` are never read
[INFO] [stdout]   --> src/generics_traaits_in_rs.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub struct MPoint<T, U> {
[INFO] [stdout]    |            ------ fields in this struct
[INFO] [stdout] 19 |     pub x: T,
[INFO] [stdout]    |         ^
[INFO] [stdout] 20 |     pub y: U,
[INFO] [stdout]    |         ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `MPoint` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Coin` is never used
[INFO] [stdout]   --> src/enums_in_rust.rs:24:6
[INFO] [stdout]    |
[INFO] [stdout] 24 | enum Coin {
[INFO] [stdout]    |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_username_from_file` is never used
[INFO] [stdout]   --> src/handling_errors_in_rs.rs:67:4
[INFO] [stdout]    |
[INFO] [stdout] 67 | fn read_username_from_file() -> Result<String, io::Error> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_username_from_file_with_propa` is never used
[INFO] [stdout]   --> src/handling_errors_in_rs.rs:82:4
[INFO] [stdout]    |
[INFO] [stdout] 82 | fn read_username_from_file_with_propa() -> Result<String, io::Error> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/enums_in_rust.rs:34:11
[INFO] [stdout]    |
[INFO] [stdout] 34 |     Speak(String),              //  includes a single String .
[INFO] [stdout]    |     ----- ^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 34 |     Speak(()),              //  includes a single String .
[INFO] [stdout]    |           ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]   --> src/smart_pointers_in_rs.rs:44:10
[INFO] [stdout]    |
[INFO] [stdout] 44 |     Cons(i32, Box<List>),
[INFO] [stdout]    |     ---- ^^^  ^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     fields in this variant
[INFO] [stdout]    |
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]    |
[INFO] [stdout] 44 |     Cons((), ()),
[INFO] [stdout]    |          ~~  ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MyBox` is never constructed
[INFO] [stdout]   --> src/smart_pointers_in_rs.rs:66:8
[INFO] [stdout]    |
[INFO] [stdout] 66 | struct MyBox<T>(T);
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Quit`, `Move`, and `ChangeColor` are never constructed
[INFO] [stdout]   --> src/enums_in_rust.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 31 | pub enum Message {
[INFO] [stdout]    |          ------- variants in this enum
[INFO] [stdout] 32 |     Quit,                       //  has no data associated with it at all.
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 33 |     Move { x: u32, y: u32 },    // has named fields, like a struct does.
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 34 |     Speak(String),              //  includes a single String .
[INFO] [stdout] 35 |     ChangeColor(i32, i32, i32), // includes three i32 values
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/smart_pointers_in_rs.rs:69:8
[INFO] [stdout]    |
[INFO] [stdout] 68 | impl<T> MyBox<T> {
[INFO] [stdout]    | ---------------- associated function in this implementation
[INFO] [stdout] 69 |     fn new(x: T) -> MyBox<T> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `value_in_cents` is never used
[INFO] [stdout]   --> src/enums_in_rust.rs:63:8
[INFO] [stdout]    |
[INFO] [stdout] 63 |     fn value_in_cents(coin: Coin) -> u8 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `route` is never used
[INFO] [stdout]   --> src/enums_in_rust.rs:95:4
[INFO] [stdout]    |
[INFO] [stdout] 95 | fn route(ip_kind: &IpAddressKind) -> &IpAddressKind {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `value` and `children` are never read
[INFO] [stdout]   --> src/smart_pointers_in_rs.rs:86:5
[INFO] [stdout]    |
[INFO] [stdout] 85 | struct Node {
[INFO] [stdout]    |        ---- fields in this struct
[INFO] [stdout] 86 |     value: i32,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 87 |     parent: RefCell<Weak<Node>>,
[INFO] [stdout] 88 |     children: RefCell<Vec<Rc<Node>>>,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Node` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `x` and `y` are never read
[INFO] [stdout]  --> src/generics_traaits_in_rs.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct Point<T> {
[INFO] [stdout]   |            ----- fields in this struct
[INFO] [stdout] 4 |     pub x: T,
[INFO] [stdout]   |         ^
[INFO] [stdout] 5 |     pub y: T,
[INFO] [stdout]   |         ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Point` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `QuitMessage` is never constructed
[INFO] [stdout]   --> src/structures_in_rust.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | struct QuitMessage; // unit struct
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MoveMessage` is never constructed
[INFO] [stdout]   --> src/structures_in_rust.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct MoveMessage {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `x` is never used
[INFO] [stdout]   --> src/generics_traaits_in_rs.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | impl<T> Point<T> {
[INFO] [stdout]    | ---------------- method in this implementation
[INFO] [stdout] 11 |     fn x(&self) -> &T {
[INFO] [stdout]    |        ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `WriteMessage` is never constructed
[INFO] [stdout]   --> src/structures_in_rust.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 | struct WriteMessage(String); // tuple struct
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `x` and `y` are never read
[INFO] [stdout]   --> src/generics_traaits_in_rs.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub struct MPoint<T, U> {
[INFO] [stdout]    |            ------ fields in this struct
[INFO] [stdout] 19 |     pub x: T,
[INFO] [stdout]    |         ^
[INFO] [stdout] 20 |     pub y: U,
[INFO] [stdout]    |         ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `MPoint` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ChangeColorMessage` is never constructed
[INFO] [stdout]   --> src/structures_in_rust.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 16 | struct ChangeColorMessage(i32, i32, i32); // tuple struct
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_username_from_file` is never used
[INFO] [stdout]   --> src/handling_errors_in_rs.rs:67:4
[INFO] [stdout]    |
[INFO] [stdout] 67 | fn read_username_from_file() -> Result<String, io::Error> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_username_from_file_with_propa` is never used
[INFO] [stdout]   --> src/handling_errors_in_rs.rs:82:4
[INFO] [stdout]    |
[INFO] [stdout] 82 | fn read_username_from_file_with_propa() -> Result<String, io::Error> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `2` are never read
[INFO] [stdout]   --> src/structures_in_rust.rs:19:14
[INFO] [stdout]    |
[INFO] [stdout] 19 | struct Color(i32, i32, i32);
[INFO] [stdout]    |        ----- ^^^       ^^^
[INFO] [stdout]    |        |
[INFO] [stdout]    |        fields in this struct
[INFO] [stdout]    |
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]    |
[INFO] [stdout] 19 | struct Color((), i32, ());
[INFO] [stdout]    |              ~~       ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]   --> src/smart_pointers_in_rs.rs:44:10
[INFO] [stdout]    |
[INFO] [stdout] 44 |     Cons(i32, Box<List>),
[INFO] [stdout]    |     ---- ^^^  ^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     fields in this variant
[INFO] [stdout]    |
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]    |
[INFO] [stdout] 44 |     Cons((), ()),
[INFO] [stdout]    |          ~~  ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `1` and `2` are never read
[INFO] [stdout]   --> src/structures_in_rust.rs:20:20
[INFO] [stdout]    |
[INFO] [stdout] 20 | struct Points(i32, i32, i32);
[INFO] [stdout]    |        ------      ^^^  ^^^
[INFO] [stdout]    |        |
[INFO] [stdout]    |        fields in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing these fields
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify` is never used
[INFO] [stdout]   --> src/traits_in_rs.rs:22:12
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub fn notify(item: &impl Summary) {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MyBox` is never constructed
[INFO] [stdout]   --> src/smart_pointers_in_rs.rs:66:8
[INFO] [stdout]    |
[INFO] [stdout] 66 | struct MyBox<T>(T);
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify_bound` is never used
[INFO] [stdout]   --> src/traits_in_rs.rs:27:12
[INFO] [stdout]    |
[INFO] [stdout] 27 |     pub fn notify_bound<T: Summary>(item: &T) {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/smart_pointers_in_rs.rs:69:8
[INFO] [stdout]    |
[INFO] [stdout] 68 | impl<T> MyBox<T> {
[INFO] [stdout]    | ---------------- associated function in this implementation
[INFO] [stdout] 69 |     fn new(x: T) -> MyBox<T> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `content` is never read
[INFO] [stdout]   --> src/traits_in_rs.rs:57:9
[INFO] [stdout]    |
[INFO] [stdout] 53 | pub struct NewsArticle {
[INFO] [stdout]    |            ----------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 57 |     pub content: String,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `value` and `children` are never read
[INFO] [stdout]   --> src/smart_pointers_in_rs.rs:86:5
[INFO] [stdout]    |
[INFO] [stdout] 85 | struct Node {
[INFO] [stdout]    |        ---- fields in this struct
[INFO] [stdout] 86 |     value: i32,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 87 |     parent: RefCell<Weak<Node>>,
[INFO] [stdout] 88 |     children: RefCell<Vec<Rc<Node>>>,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Node` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `reply` and `retweet` are never read
[INFO] [stdout]   --> src/traits_in_rs.rs:68:9
[INFO] [stdout]    |
[INFO] [stdout] 65 | pub struct Tweet {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 68 |     pub reply: bool,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout] 69 |     pub retweet: bool,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `QuitMessage` is never constructed
[INFO] [stdout]   --> src/structures_in_rust.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | struct QuitMessage; // unit struct
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `diffList` should have a snake case name
[INFO] [stdout]   --> src/closures_in_rs.rs:45:13
[INFO] [stdout]    |
[INFO] [stdout] 45 |     let mut diffList = vec![2, 4, 5];
[INFO] [stdout]    |             ^^^^^^^^ help: convert the identifier to snake case: `diff_list`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MoveMessage` is never constructed
[INFO] [stdout]   --> src/structures_in_rust.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct MoveMessage {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `mStr` should have a snake case name
[INFO] [stdout]   --> src/references_borrowing.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |     let mStr = change_reference(&mut s1);
[INFO] [stdout]    |         ^^^^ help: convert the identifier to snake case: `m_str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `WriteMessage` is never constructed
[INFO] [stdout]   --> src/structures_in_rust.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 | struct WriteMessage(String); // tuple struct
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ChangeColorMessage` is never constructed
[INFO] [stdout]   --> src/structures_in_rust.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 16 | struct ChangeColorMessage(i32, i32, i32); // tuple struct
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `2` are never read
[INFO] [stdout]   --> src/structures_in_rust.rs:19:14
[INFO] [stdout]    |
[INFO] [stdout] 19 | struct Color(i32, i32, i32);
[INFO] [stdout]    |        ----- ^^^       ^^^
[INFO] [stdout]    |        |
[INFO] [stdout]    |        fields in this struct
[INFO] [stdout]    |
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]    |
[INFO] [stdout] 19 | struct Color((), i32, ());
[INFO] [stdout]    |              ~~       ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `1` and `2` are never read
[INFO] [stdout]   --> src/structures_in_rust.rs:20:20
[INFO] [stdout]    |
[INFO] [stdout] 20 | struct Points(i32, i32, i32);
[INFO] [stdout]    |        ------      ^^^  ^^^
[INFO] [stdout]    |        |
[INFO] [stdout]    |        fields in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing these fields
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify` is never used
[INFO] [stdout]   --> src/traits_in_rs.rs:22:12
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub fn notify(item: &impl Summary) {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify_bound` is never used
[INFO] [stdout]   --> src/traits_in_rs.rs:27:12
[INFO] [stdout]    |
[INFO] [stdout] 27 |     pub fn notify_bound<T: Summary>(item: &T) {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `content` is never read
[INFO] [stdout]   --> src/traits_in_rs.rs:57:9
[INFO] [stdout]    |
[INFO] [stdout] 53 | pub struct NewsArticle {
[INFO] [stdout]    |            ----------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 57 |     pub content: String,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `reply` and `retweet` are never read
[INFO] [stdout]   --> src/traits_in_rs.rs:68:9
[INFO] [stdout]    |
[INFO] [stdout] 65 | pub struct Tweet {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 68 |     pub reply: bool,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout] 69 |     pub retweet: bool,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `diffList` should have a snake case name
[INFO] [stdout]   --> src/closures_in_rs.rs:45:13
[INFO] [stdout]    |
[INFO] [stdout] 45 |     let mut diffList = vec![2, 4, 5];
[INFO] [stdout]    |             ^^^^^^^^ help: convert the identifier to snake case: `diff_list`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `mStr` should have a snake case name
[INFO] [stdout]   --> src/references_borrowing.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |     let mStr = change_reference(&mut s1);
[INFO] [stdout]    |         ^^^^ help: convert the identifier to snake case: `m_str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 51 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 51 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.18s
[INFO] running `Command { std: "docker" "inspect" "4fd784546b03080669e0e4010312cc98c92bad861c96cdfed8d8353f92c65acc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4fd784546b03080669e0e4010312cc98c92bad861c96cdfed8d8353f92c65acc", kill_on_drop: false }`
[INFO] [stdout] 4fd784546b03080669e0e4010312cc98c92bad861c96cdfed8d8353f92c65acc