[INFO] cloning repository https://github.com/yujin97/rust-the-book
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/yujin97/rust-the-book" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyujin97%2Frust-the-book", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyujin97%2Frust-the-book'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d59ac3216b5a61c22d38bbbc3fa3794cdcc4044c
[INFO] checking yujin97/rust-the-book against master#1f12b9b0fdbe735968ac002792a720f0ba4faca6 for crater-rollup-uwu
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyujin97%2Frust-the-book" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/yujin97/rust-the-book 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/yujin97/rust-the-book
[INFO] finished tweaking git repo https://github.com/yujin97/rust-the-book
[INFO] tweaked toml for git repo https://github.com/yujin97/rust-the-book written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/yujin97/rust-the-book 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] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr] note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr] note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr] note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] [stderr] warning: /workspace/builds/worker-1-tc1/source/Cargo.toml: unused manifest key: workspace.edition
[INFO] [stderr] warning: /workspace/builds/worker-1-tc1/source/Cargo.toml: unused manifest key: workspace.name
[INFO] [stderr] warning: /workspace/builds/worker-1-tc1/source/Cargo.toml: unused manifest key: workspace.version
[INFO] [stderr] warning: /workspace/builds/worker-1-tc1/source/lifetimes/Cargo.toml: no edition set: defaulting to the 2015 edition while the latest is 2021
[INFO] [stderr] warning: /workspace/builds/worker-1-tc1/source/adder/Cargo.toml: no edition set: defaulting to the 2015 edition while the latest is 2021
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] caf2f16823a3a9905df5165fa3dd89e86614f9739c03abb2ae8cab99cc0abd76
[INFO] running `Command { std: "docker" "start" "-a" "caf2f16823a3a9905df5165fa3dd89e86614f9739c03abb2ae8cab99cc0abd76", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "caf2f16823a3a9905df5165fa3dd89e86614f9739c03abb2ae8cab99cc0abd76", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "caf2f16823a3a9905df5165fa3dd89e86614f9739c03abb2ae8cab99cc0abd76", kill_on_drop: false }`
[INFO] [stdout] caf2f16823a3a9905df5165fa3dd89e86614f9739c03abb2ae8cab99cc0abd76
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8a90c920e17e1cd2edbffb312fd86d6f74e61c69c77857f63fb0f7d9626fe627
[INFO] running `Command { std: "docker" "start" "-a" "8a90c920e17e1cd2edbffb312fd86d6f74e61c69c77857f63fb0f7d9626fe627", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr] note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr] note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr] note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] [stderr] warning: /opt/rustwide/workdir/adder/Cargo.toml: no edition set: defaulting to the 2015 edition while the latest is 2021
[INFO] [stderr] warning: /opt/rustwide/workdir/Cargo.toml: unused manifest key: workspace.edition
[INFO] [stderr] warning: /opt/rustwide/workdir/Cargo.toml: unused manifest key: workspace.name
[INFO] [stderr] warning: /opt/rustwide/workdir/Cargo.toml: unused manifest key: workspace.version
[INFO] [stderr] warning: /opt/rustwide/workdir/lifetimes/Cargo.toml: no edition set: defaulting to the 2015 edition while the latest is 2021
[INFO] [stderr]    Compiling proc-macro2 v1.0.60
[INFO] [stderr]    Compiling quote v1.0.28
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling unicode-ident v1.0.9
[INFO] [stderr]     Checking trait_object v0.1.0 (/opt/rustwide/workdir/trait_object)
[INFO] [stderr]     Checking server v0.1.0 (/opt/rustwide/workdir/server)
[INFO] [stderr]     Checking pointer_box v0.1.0 (/opt/rustwide/workdir/pointer_box)
[INFO] [stderr]     Checking blog v0.1.0 (/opt/rustwide/workdir/blog)
[INFO] [stderr]     Checking ref_cell v0.1.0 (/opt/rustwide/workdir/ref_cell)
[INFO] [stderr]     Checking oop v0.1.0 (/opt/rustwide/workdir/oop)
[INFO] [stderr]     Checking minigrep v0.1.0 (/opt/rustwide/workdir/minigrep)
[INFO] [stderr]     Checking my_crates v0.1.0 (/opt/rustwide/workdir/my_crates)
[INFO] [stderr]     Checking blog_type v0.1.0 (/opt/rustwide/workdir/blog_type)
[INFO] [stderr]     Checking hello_macro v0.1.0 (/opt/rustwide/workdir/hello_macro)
[INFO] [stderr]     Checking adder v0.1.0 (/opt/rustwide/workdir/adder)
[INFO] [stdout] warning: unused variable: `c1`
[INFO] [stdout]   --> my_crates/src/lib.rs:45:16
[INFO] [stdout]    |
[INFO] [stdout] 45 |     pub fn mix(c1: PrimaryColor, c2: PrimaryColor) -> SecondaryColor {
[INFO] [stdout]    |                ^^ help: if this is intentional, prefix it with an underscore: `_c1`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c2`
[INFO] [stdout]   --> my_crates/src/lib.rs:45:34
[INFO] [stdout]    |
[INFO] [stdout] 45 |     pub fn mix(c1: PrimaryColor, c2: PrimaryColor) -> SecondaryColor {
[INFO] [stdout]    |                                  ^^ help: if this is intentional, prefix it with an underscore: `_c2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `width` and `height` are never read
[INFO] [stdout]   --> adder/src/lib.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 9  | pub struct Rectangle {
[INFO] [stdout]    |            --------- fields in this struct
[INFO] [stdout] 10 |     width: u32,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 11 |     height: 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]   --> adder/src/lib.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 14 | impl Rectangle {
[INFO] [stdout]    | -------------- method in this implementation
[INFO] [stdout] 15 |     fn can_hold(&self, other: &Rectangle) -> bool {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `value` is never read
[INFO] [stdout]   --> adder/src/lib.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub struct Guess {
[INFO] [stdout]    |            ----- field in this struct
[INFO] [stdout] 25 |     value: i32,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `list`
[INFO] [stdout]  --> pointer_box/src/main.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let list = Cons(1, Box::new(Cons(2, Box::new(Cons(3, Box::new(Nil))))));
[INFO] [stdout]   |         ^^^^ help: if this is intentional, prefix it with an underscore: `_list`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `width`, `height`, and `options` are never read
[INFO] [stdout]  --> trait_object/src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct SelectBox {
[INFO] [stdout]   |        --------- fields in this struct
[INFO] [stdout] 4 |     width: u32,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 5 |     height: u32,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 6 |     options: Vec<String>,
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `width`, `height`, and `options` are never read
[INFO] [stdout]  --> trait_object/src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct SelectBox {
[INFO] [stdout]   |        --------- fields in this struct
[INFO] [stdout] 4 |     width: u32,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 5 |     height: u32,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 6 |     options: Vec<String>,
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking match v0.1.0 (/opt/rustwide/workdir/match)
[INFO] [stderr]     Checking lifetimes v0.1.0 (/opt/rustwide/workdir/lifetimes)
[INFO] [stderr]     Checking closures v0.1.0 (/opt/rustwide/workdir/closures)
[INFO] [stderr]     Checking generic_data_types v0.1.0 (/opt/rustwide/workdir/generic_data_types)
[INFO] [stderr]     Checking reference_cycle v0.1.0 (/opt/rustwide/workdir/reference_cycle)
[INFO] [stderr]     Checking unsafe_rust v0.1.0 (/opt/rustwide/workdir/unsafe_rust)
[INFO] [stderr]     Checking the_slice_type v0.1.0 (/opt/rustwide/workdir/the_slice_type)
[INFO] [stderr]     Checking struct v0.1.0 (/opt/rustwide/workdir/struct)
[INFO] [stderr]     Checking advanced_functions v0.1.0 (/opt/rustwide/workdir/advanced_functions)
[INFO] [stdout] warning: unused variable: `list`
[INFO] [stdout]  --> pointer_box/src/main.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let list = Cons(1, Box::new(Cons(2, Box::new(Cons(3, Box::new(Nil))))));
[INFO] [stdout]   |         ^^^^ help: if this is intentional, prefix it with an underscore: `_list`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking my_box v0.1.0 (/opt/rustwide/workdir/my_box)
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> lifetimes/src/main.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let i = ImportantExcerpt {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `six`
[INFO] [stdout]  --> match/src/main.rs:3:9
[INFO] [stdout]   |
[INFO] [stdout] 3 |     let six = plus_one(five);
[INFO] [stdout]   |         ^^^ help: if this is intentional, prefix it with an underscore: `_six`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `part` is never read
[INFO] [stdout]   --> lifetimes/src/main.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 30 | struct ImportantExcerpt<'a> {
[INFO] [stdout]    |        ---------------- field in this struct
[INFO] [stdout] 31 |     part: &'a str,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `just_str` is never used
[INFO] [stdout]   --> lifetimes/src/main.rs:51:4
[INFO] [stdout]    |
[INFO] [stdout] 51 | fn just_str<'a>() -> &'a str {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `none`
[INFO] [stdout]  --> match/src/main.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     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: variable `count` is assigned to, but never used
[INFO] [stdout]   --> match/src/main.rs:39:13
[INFO] [stdout]    |
[INFO] [stdout] 39 |     let mut count = 0;
[INFO] [stdout]    |             ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_count` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `count` is never read
[INFO] [stdout]   --> match/src/main.rs:43:9
[INFO] [stdout]    |
[INFO] [stdout] 43 |         count += 1;
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking loops v0.1.0 (/opt/rustwide/workdir/loops)
[INFO] [stdout] warning: enum `Coin` is never used
[INFO] [stdout]   --> match/src/main.rs:13:6
[INFO] [stdout]    |
[INFO] [stdout] 13 | enum Coin {
[INFO] [stdout]    |      ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `UsState` is never used
[INFO] [stdout]   --> match/src/main.rs:21:6
[INFO] [stdout]    |
[INFO] [stdout] 21 | enum UsState {
[INFO] [stdout]    |      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `value_in_cents` is never used
[INFO] [stdout]   --> match/src/main.rs:26:4
[INFO] [stdout]    |
[INFO] [stdout] 26 | fn value_in_cents(coin: Coin) -> u8 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `count_coin` is never used
[INFO] [stdout]   --> match/src/main.rs:38:4
[INFO] [stdout]    |
[INFO] [stdout] 38 | fn count_coin(coin: Coin) {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `mix`
[INFO] [stdout]  --> generic_data_types/src/main.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let mix = both_integer.mixup(integer_and_float);
[INFO] [stdout]   |         ^^^ help: if this is intentional, prefix it with an underscore: `_mix`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::mem::size_of`
[INFO] [stdout]  --> struct/src/main.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::mem::size_of;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `mix_up`
[INFO] [stdout]   --> generic_data_types/src/main.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let mix_up = string_string.mixup(integer_and_string);
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_mix_up`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `mix`
[INFO] [stdout]  --> generic_data_types/src/main.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let mix = both_integer.mixup(integer_and_float);
[INFO] [stdout]   |         ^^^ help: if this is intentional, prefix it with an underscore: `_mix`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `mix_up`
[INFO] [stdout]   --> generic_data_types/src/main.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let mix_up = string_string.mixup(integer_and_string);
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_mix_up`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `largest` is never used
[INFO] [stdout]   --> generic_data_types/src/main.rs:16:4
[INFO] [stdout]    |
[INFO] [stdout] 16 | fn largest<T: std::cmp::PartialOrd>(list: &[T]) -> &T {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `x` is never used
[INFO] [stdout]   --> generic_data_types/src/main.rs:34:8
[INFO] [stdout]    |
[INFO] [stdout] 33 | impl<T, U> Point<T, U> {
[INFO] [stdout]    | ---------------------- method in this implementation
[INFO] [stdout] 34 |     fn x(&self) -> &T {
[INFO] [stdout]    |        ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `largest` is never used
[INFO] [stdout]   --> generic_data_types/src/main.rs:16:4
[INFO] [stdout]    |
[INFO] [stdout] 16 | fn largest<T: std::cmp::PartialOrd>(list: &[T]) -> &T {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `distance_from_origin` is never used
[INFO] [stdout]   --> generic_data_types/src/main.rs:40:8
[INFO] [stdout]    |
[INFO] [stdout] 39 | impl Point<f32, f32> {
[INFO] [stdout]    | -------------------- method in this implementation
[INFO] [stdout] 40 |     fn distance_from_origin(&self) -> f32 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `x` is never used
[INFO] [stdout]   --> generic_data_types/src/main.rs:34:8
[INFO] [stdout]    |
[INFO] [stdout] 33 | impl<T, U> Point<T, U> {
[INFO] [stdout]    | ---------------------- method in this implementation
[INFO] [stdout] 34 |     fn x(&self) -> &T {
[INFO] [stdout]    |        ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `distance_from_origin` is never used
[INFO] [stdout]   --> generic_data_types/src/main.rs:40:8
[INFO] [stdout]    |
[INFO] [stdout] 39 | impl Point<f32, f32> {
[INFO] [stdout]    | -------------------- method in this implementation
[INFO] [stdout] 40 |     fn distance_from_origin(&self) -> f32 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking enum v0.1.0 (/opt/rustwide/workdir/enum)
[INFO] [stderr]     Checking collections v0.1.0 (/opt/rustwide/workdir/collections)
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking reference_count v0.1.0 (/opt/rustwide/workdir/reference_count)
[INFO] [stdout] warning: field `height` is never read
[INFO] [stdout]   --> closures/src/main.rs:38:5
[INFO] [stdout]    |
[INFO] [stdout] 36 | struct Rectangle {
[INFO] [stdout]    |        --------- field in this struct
[INFO] [stdout] 37 |     width: u32,
[INFO] [stdout] 38 |     height: 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]  --> reference_cycle/src/main.rs:7:10
[INFO] [stdout]   |
[INFO] [stdout] 7 |     Cons(i32, RefCell<Rc<List>>),
[INFO] [stdout]   |     ---- ^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `List` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[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 |     Cons((), RefCell<Rc<List>>),
[INFO] [stdout]   |          ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `user2`
[INFO] [stdout]   --> struct/src/main.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let user2 = User {
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_user2`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `black`
[INFO] [stdout]   --> struct/src/main.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let black = Color(0, 0, 0);
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_black`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `origin`
[INFO] [stdout]   --> struct/src/main.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |     let origin = Point(0, 0, 0);
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_origin`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `subject`
[INFO] [stdout]   --> struct/src/main.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let subject = AlwaysEqual;
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_subject`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `value` and `children` are never read
[INFO] [stdout]   --> reference_cycle/src/main.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 21 | struct Node {
[INFO] [stdout]    |        ---- fields in this struct
[INFO] [stdout] 22 |     value: i32,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 23 |     parent: RefCell<Weak<Node>>,
[INFO] [stdout] 24 |     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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `r`
[INFO] [stdout]   --> unsafe_rust/src/main.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let r = address as *const i32;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_r`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `active`, `username`, and `sign_in_count` are never read
[INFO] [stdout]   --> struct/src/main.rs:50:5
[INFO] [stdout]    |
[INFO] [stdout] 49 | struct User {
[INFO] [stdout]    |        ---- fields in this struct
[INFO] [stdout] 50 |     active: bool,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 51 |     username: String,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 52 |     email: String,
[INFO] [stdout] 53 |     sign_in_count: u64,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `split_at_mut` is never used
[INFO] [stdout]   --> unsafe_rust/src/main.rs:48:4
[INFO] [stdout]    |
[INFO] [stdout] 48 | fn split_at_mut(values: &mut [i32], mid: usize) -> (&mut [i32], &mut [i32]) {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `build_user` is never used
[INFO] [stdout]   --> struct/src/main.rs:56:4
[INFO] [stdout]    |
[INFO] [stdout] 56 | fn build_user(email: String, username: String) -> User {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0`, `1`, and `2` are never read
[INFO] [stdout]   --> struct/src/main.rs:66:14
[INFO] [stdout]    |
[INFO] [stdout] 66 | struct Color(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: fields `0`, `1`, and `2` are never read
[INFO] [stdout]   --> struct/src/main.rs:67:14
[INFO] [stdout]    |
[INFO] [stdout] 67 | struct Point(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: associated function `square` is never used
[INFO] [stdout]   --> struct/src/main.rs:87:8
[INFO] [stdout]    |
[INFO] [stdout] 78 | impl Rectangle {
[INFO] [stdout]    | -------------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 87 |     fn square(size: u32) -> Self {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking advanced_traits v0.1.0 (/opt/rustwide/workdir/advanced_traits)
[INFO] [stderr]     Checking vectors v0.1.0 (/opt/rustwide/workdir/vectors)
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> advanced_functions/src/main.rs:10:11
[INFO] [stdout]    |
[INFO] [stdout] 10 |     Value(u32),
[INFO] [stdout]    |     ----- ^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[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] 10 |     Value(()),
[INFO] [stdout]    |           ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Stop` is never constructed
[INFO] [stdout]   --> advanced_functions/src/main.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 9  | enum Status {
[INFO] [stdout]    |      ------ variant in this enum
[INFO] [stdout] 10 |     Value(u32),
[INFO] [stdout] 11 |     Stop,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking threads v0.1.0 (/opt/rustwide/workdir/threads)
[INFO] [stderr]     Checking traits v0.1.0 (/opt/rustwide/workdir/traits)
[INFO] [stderr]     Checking channels v0.1.0 (/opt/rustwide/workdir/channels)
[INFO] [stdout] warning: field `height` is never read
[INFO] [stdout]   --> closures/src/main.rs:38:5
[INFO] [stdout]    |
[INFO] [stdout] 36 | struct Rectangle {
[INFO] [stdout]    |        --------- field in this struct
[INFO] [stdout] 37 |     width: u32,
[INFO] [stdout] 38 |     height: u32,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `home`
[INFO] [stdout]  --> enum/src/main.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 2 |     let home = IpAddrKind::V4(127, 0, 0, 1);
[INFO] [stdout]   |         ^^^^ help: if this is intentional, prefix it with an underscore: `_home`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `loopback`
[INFO] [stdout]  --> enum/src/main.rs:3:9
[INFO] [stdout]   |
[INFO] [stdout] 3 |     let loopback = IpAddrKind::V6(String::from("::1"));
[INFO] [stdout]   |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_loopback`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0`, `1`, `2`, and `3` are never read
[INFO] [stdout]  --> enum/src/main.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 |     V4(u8, u8, u8, u8),
[INFO] [stdout]   |     -- ^^  ^^  ^^  ^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     fields in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[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] 7 |     V4((), (), (), ()),
[INFO] [stdout]   |        ~~  ~~  ~~  ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> enum/src/main.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 |     V6(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] 8 |     V6(()),
[INFO] [stdout]   |        ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Message` is never used
[INFO] [stdout]   --> enum/src/main.rs:11:6
[INFO] [stdout]    |
[INFO] [stdout] 11 | enum Message {
[INFO] [stdout]    |      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> advanced_functions/src/main.rs:10:11
[INFO] [stdout]    |
[INFO] [stdout] 10 |     Value(u32),
[INFO] [stdout]    |     ----- ^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[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] 10 |     Value(()),
[INFO] [stdout]    |           ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Stop` is never constructed
[INFO] [stdout]   --> advanced_functions/src/main.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 9  | enum Status {
[INFO] [stdout]    |      ------ variant in this enum
[INFO] [stdout] 10 |     Value(u32),
[INFO] [stdout] 11 |     Stop,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]  --> reference_count/src/main.rs:3:10
[INFO] [stdout]   |
[INFO] [stdout] 3 |     Cons(Rc<RefCell<i32>>, Rc<List>),
[INFO] [stdout]   |     ---- ^^^^^^^^^^^^^^^^  ^^^^^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     fields in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `List` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[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] 3 |     Cons((), ()),
[INFO] [stdout]   |          ~~  ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking references_and_borrowing v0.1.0 (/opt/rustwide/workdir/references_and_borrowing)
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]  --> vectors/src/main.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 2 |     let v: Vec<i32> = Vec::new();
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `row`
[INFO] [stdout]   --> vectors/src/main.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 34 |     let row = vec![
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_row`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking strings v0.1.0 (/opt/rustwide/workdir/strings)
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> reference_cycle/src/main.rs:7:10
[INFO] [stdout]   |
[INFO] [stdout] 7 |     Cons(i32, RefCell<Rc<List>>),
[INFO] [stdout]   |     ---- ^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `List` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[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 |     Cons((), RefCell<Rc<List>>),
[INFO] [stdout]   |          ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `value` and `children` are never read
[INFO] [stdout]   --> reference_cycle/src/main.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 21 | struct Node {
[INFO] [stdout]    |        ---- fields in this struct
[INFO] [stdout] 22 |     value: i32,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 23 |     parent: RefCell<Weak<Node>>,
[INFO] [stdout] 24 |     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: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::mem::size_of`
[INFO] [stdout]  --> struct/src/main.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::mem::size_of;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking hash_maps v0.1.0 (/opt/rustwide/workdir/hash_maps)
[INFO] [stdout] warning: associated function `baby_name` is never used
[INFO] [stdout]   --> advanced_traits/src/main.rs:67:8
[INFO] [stdout]    |
[INFO] [stdout] 66 | impl Dog {
[INFO] [stdout]    | -------- associated function in this implementation
[INFO] [stdout] 67 |     fn baby_name() -> String {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking drop v0.1.0 (/opt/rustwide/workdir/drop)
[INFO] [stdout] warning: function `returns_summarizable` is never used
[INFO] [stdout]   --> traits/src/main.rs:69:4
[INFO] [stdout]    |
[INFO] [stdout] 69 | fn returns_summarizable() -> impl Summary {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `user2`
[INFO] [stdout]   --> struct/src/main.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let user2 = User {
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_user2`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `black`
[INFO] [stdout]   --> struct/src/main.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let black = Color(0, 0, 0);
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_black`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `origin`
[INFO] [stdout]   --> struct/src/main.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |     let origin = Point(0, 0, 0);
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_origin`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `subject`
[INFO] [stdout]   --> struct/src/main.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let subject = AlwaysEqual;
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_subject`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `active`, `username`, and `sign_in_count` are never read
[INFO] [stdout]   --> struct/src/main.rs:50:5
[INFO] [stdout]    |
[INFO] [stdout] 49 | struct User {
[INFO] [stdout]    |        ---- fields in this struct
[INFO] [stdout] 50 |     active: bool,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 51 |     username: String,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 52 |     email: String,
[INFO] [stdout] 53 |     sign_in_count: u64,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `build_user` is never used
[INFO] [stdout]   --> struct/src/main.rs:56:4
[INFO] [stdout]    |
[INFO] [stdout] 56 | fn build_user(email: String, username: String) -> User {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0`, `1`, and `2` are never read
[INFO] [stdout]   --> struct/src/main.rs:66:14
[INFO] [stdout]    |
[INFO] [stdout] 66 | struct Color(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: fields `0`, `1`, and `2` are never read
[INFO] [stdout]   --> struct/src/main.rs:67:14
[INFO] [stdout]    |
[INFO] [stdout] 67 | struct Point(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: associated function `square` is never used
[INFO] [stdout]   --> struct/src/main.rs:87:8
[INFO] [stdout]    |
[INFO] [stdout] 78 | impl Rectangle {
[INFO] [stdout]    | -------------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 87 |     fn square(size: u32) -> Self {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking ownership v0.1.0 (/opt/rustwide/workdir/ownership)
[INFO] [stderr]     Checking macros v0.1.0 (/opt/rustwide/workdir/macros)
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking backyard v0.1.0 (/opt/rustwide/workdir/backyard)
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]  --> strings/src/main.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let s = data.to_string();
[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: field `value` is never read
[INFO] [stdout]   --> adder/src/lib.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub struct Guess {
[INFO] [stdout]    |            ----- field in this struct
[INFO] [stdout] 25 |     value: i32,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]  --> reference_count/src/main.rs:3:10
[INFO] [stdout]   |
[INFO] [stdout] 3 |     Cons(Rc<RefCell<i32>>, Rc<List>),
[INFO] [stdout]   |     ---- ^^^^^^^^^^^^^^^^  ^^^^^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     fields in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `List` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[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] 3 |     Cons((), ()),
[INFO] [stdout]   |          ~~  ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking iterators v0.1.0 (/opt/rustwide/workdir/iterators)
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking errors v0.1.0 (/opt/rustwide/workdir/errors)
[INFO] [stdout] warning: unused variable: `d`
[INFO] [stdout]   --> drop/src/main.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let d = CustomSmartPointer {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_d`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `six`
[INFO] [stdout]  --> match/src/main.rs:3:9
[INFO] [stdout]   |
[INFO] [stdout] 3 |     let six = plus_one(five);
[INFO] [stdout]   |         ^^^ help: if this is intentional, prefix it with an underscore: `_six`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `none`
[INFO] [stdout]  --> match/src/main.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     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: variable `count` is assigned to, but never used
[INFO] [stdout]   --> match/src/main.rs:39:13
[INFO] [stdout]    |
[INFO] [stdout] 39 |     let mut count = 0;
[INFO] [stdout]    |             ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_count` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `count` is never read
[INFO] [stdout]   --> match/src/main.rs:43:9
[INFO] [stdout]    |
[INFO] [stdout] 43 |         count += 1;
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Coin` is never used
[INFO] [stdout]   --> match/src/main.rs:13:6
[INFO] [stdout]    |
[INFO] [stdout] 13 | enum Coin {
[INFO] [stdout]    |      ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `UsState` is never used
[INFO] [stdout]   --> match/src/main.rs:21:6
[INFO] [stdout]    |
[INFO] [stdout] 21 | enum UsState {
[INFO] [stdout]    |      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `value_in_cents` is never used
[INFO] [stdout]   --> match/src/main.rs:26:4
[INFO] [stdout]    |
[INFO] [stdout] 26 | fn value_in_cents(coin: Coin) -> u8 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `count_coin` is never used
[INFO] [stdout]   --> match/src/main.rs:38:4
[INFO] [stdout]    |
[INFO] [stdout] 38 | fn count_coin(coin: Coin) {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking advanced_types v0.1.0 (/opt/rustwide/workdir/advanced_types)
[INFO] [stderr]     Checking patterns v0.1.0 (/opt/rustwide/workdir/patterns)
[INFO] [stdout] warning: function `returns_summarizable` is never used
[INFO] [stdout]   --> traits/src/main.rs:69:4
[INFO] [stdout]    |
[INFO] [stdout] 69 | fn returns_summarizable() -> impl Summary {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Shoe` is never constructed
[INFO] [stdout]  --> iterators/src/lib.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Shoe {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `shoes_in_size` is never used
[INFO] [stdout]  --> iterators/src/lib.rs:7:4
[INFO] [stdout]   |
[INFO] [stdout] 7 | fn shoes_in_size(shoes: Vec<Shoe>, shoe_size: u32) -> Vec<Shoe> {
[INFO] [stdout]   |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c1`
[INFO] [stdout]   --> my_crates/src/lib.rs:45:16
[INFO] [stdout]    |
[INFO] [stdout] 45 |     pub fn mix(c1: PrimaryColor, c2: PrimaryColor) -> SecondaryColor {
[INFO] [stdout]    |                ^^ help: if this is intentional, prefix it with an underscore: `_c1`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c2`
[INFO] [stdout]   --> my_crates/src/lib.rs:45:34
[INFO] [stdout]    |
[INFO] [stdout] 45 |     pub fn mix(c1: PrimaryColor, c2: PrimaryColor) -> SecondaryColor {
[INFO] [stdout]    |                                  ^^ help: if this is intentional, prefix it with an underscore: `_c2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `greeting_file`
[INFO] [stdout]  --> errors/src/main.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let greeting_file = match greeting_file_result {
[INFO] [stdout]   |         ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_greeting_file`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `other_error`
[INFO] [stdout]   --> errors/src/main.rs:15:13
[INFO] [stdout]    |
[INFO] [stdout] 15 |             other_error => {
[INFO] [stdout]    |             ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_other_error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `greeting_file`
[INFO] [stdout]   --> errors/src/main.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |     let greeting_file = File::open("hello.txt").unwrap();
[INFO] [stdout]    |         ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_greeting_file`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `greeting_file`
[INFO] [stdout]   --> errors/src/main.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let greeting_file =
[INFO] [stdout]    |         ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_greeting_file`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]  --> strings/src/main.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let s = data.to_string();
[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: function `read_username_from_file` is never used
[INFO] [stdout]   --> errors/src/main.rs:28:4
[INFO] [stdout]    |
[INFO] [stdout] 28 | fn read_username_from_file() -> Result<String, io::Error> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_username_from_file_short` is never used
[INFO] [stdout]   --> errors/src/main.rs:44:4
[INFO] [stdout]    |
[INFO] [stdout] 44 | fn read_username_from_file_short() -> Result<String, io::Error> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_username_from_file_short_chaining` is never used
[INFO] [stdout]   --> errors/src/main.rs:51:4
[INFO] [stdout]    |
[INFO] [stdout] 51 | fn read_username_from_file_short_chaining() -> Result<String, io::Error> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_username_from_file_shortest` is never used
[INFO] [stdout]   --> errors/src/main.rs:59:4
[INFO] [stdout]    |
[INFO] [stdout] 59 | fn read_username_from_file_shortest() -> Result<String, io::Error> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `last_char_first_line` is never used
[INFO] [stdout]   --> errors/src/main.rs:63:4
[INFO] [stdout]    |
[INFO] [stdout] 63 | fn last_char_first_line(text: &str) -> Option<char> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking restaurant v0.1.0 (/opt/rustwide/workdir/restaurant)
[INFO] [stdout] warning: unused variable: `feet`
[INFO] [stdout]    --> patterns/src/main.rs:102:11
[INFO] [stdout]     |
[INFO] [stdout] 102 |     let ((feet, inch), Point { x, y }) = ((3, 10), Point { x: 3, y: -10 });
[INFO] [stdout]     |           ^^^^ help: if this is intentional, prefix it with an underscore: `_feet`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `inch`
[INFO] [stdout]    --> patterns/src/main.rs:102:17
[INFO] [stdout]     |
[INFO] [stdout] 102 |     let ((feet, inch), Point { x, y }) = ((3, 10), Point { x: 3, y: -10 });
[INFO] [stdout]     |                 ^^^^ help: if this is intentional, prefix it with an underscore: `_inch`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> patterns/src/main.rs:102:32
[INFO] [stdout]     |
[INFO] [stdout] 102 |     let ((feet, inch), Point { x, y }) = ((3, 10), Point { x: 3, y: -10 });
[INFO] [stdout]     |                                ^ help: try ignoring the field: `x: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `feet`
[INFO] [stdout]    --> patterns/src/main.rs:102:11
[INFO] [stdout]     |
[INFO] [stdout] 102 |     let ((feet, inch), Point { x, y }) = ((3, 10), Point { x: 3, y: -10 });
[INFO] [stdout]     |           ^^^^ help: if this is intentional, prefix it with an underscore: `_feet`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]    --> patterns/src/main.rs:102:35
[INFO] [stdout]     |
[INFO] [stdout] 102 |     let ((feet, inch), Point { x, y }) = ((3, 10), Point { x: 3, y: -10 });
[INFO] [stdout]     |                                   ^ help: try ignoring the field: `y: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `inch`
[INFO] [stdout]    --> patterns/src/main.rs:102:17
[INFO] [stdout]     |
[INFO] [stdout] 102 |     let ((feet, inch), Point { x, y }) = ((3, 10), Point { x: 3, y: -10 });
[INFO] [stdout]     |                 ^^^^ help: if this is intentional, prefix it with an underscore: `_inch`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> patterns/src/main.rs:102:32
[INFO] [stdout]     |
[INFO] [stdout] 102 |     let ((feet, inch), Point { x, y }) = ((3, 10), Point { x: 3, y: -10 });
[INFO] [stdout]     |                                ^ help: try ignoring the field: `x: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]    --> patterns/src/main.rs:102:35
[INFO] [stdout]     |
[INFO] [stdout] 102 |     let ((feet, inch), Point { x, y }) = ((3, 10), Point { x: 3, y: -10 });
[INFO] [stdout]     |                                   ^ help: try ignoring the field: `y: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Hsv` is never constructed
[INFO] [stdout]   --> patterns/src/main.rs:72:9
[INFO] [stdout]    |
[INFO] [stdout] 70 |     enum Color {
[INFO] [stdout]    |          ----- variant in this enum
[INFO] [stdout] 71 |         Rgb(i32, i32, i32),
[INFO] [stdout] 72 |         Hsv(i32, i32, i32),
[INFO] [stdout]    |         ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Quit`, `Move`, and `Write` are never constructed
[INFO] [stdout]   --> patterns/src/main.rs:76:9
[INFO] [stdout]    |
[INFO] [stdout] 75 |     enum Message {
[INFO] [stdout]    |          ------- variants in this enum
[INFO] [stdout] 76 |         Quit,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 77 |         Move { x: i32, y: i32 },
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 78 |         Write(String),
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `y` and `z` are never read
[INFO] [stdout]    --> patterns/src/main.rs:146:9
[INFO] [stdout]     |
[INFO] [stdout] 144 |     struct Point3D {
[INFO] [stdout]     |            ------- fields in this struct
[INFO] [stdout] 145 |         x: i32,
[INFO] [stdout] 146 |         y: i32,
[INFO] [stdout]     |         ^
[INFO] [stdout] 147 |         z: i32,
[INFO] [stdout]     |         ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `d`
[INFO] [stdout]   --> drop/src/main.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let d = CustomSmartPointer {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_d`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `home`
[INFO] [stdout]  --> enum/src/main.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 2 |     let home = IpAddrKind::V4(127, 0, 0, 1);
[INFO] [stdout]   |         ^^^^ help: if this is intentional, prefix it with an underscore: `_home`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `loopback`
[INFO] [stdout]  --> enum/src/main.rs:3:9
[INFO] [stdout]   |
[INFO] [stdout] 3 |     let loopback = IpAddrKind::V6(String::from("::1"));
[INFO] [stdout]   |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_loopback`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0`, `1`, `2`, and `3` are never read
[INFO] [stdout]  --> enum/src/main.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 |     V4(u8, u8, u8, u8),
[INFO] [stdout]   |     -- ^^  ^^  ^^  ^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     fields in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[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] 7 |     V4((), (), (), ()),
[INFO] [stdout]   |        ~~  ~~  ~~  ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> enum/src/main.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 |     V6(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] 8 |     V6(()),
[INFO] [stdout]   |        ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Message` is never used
[INFO] [stdout]   --> enum/src/main.rs:11:6
[INFO] [stdout]    |
[INFO] [stdout] 11 | enum Message {
[INFO] [stdout]    |      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `greeting_file`
[INFO] [stdout]  --> errors/src/main.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let greeting_file = match greeting_file_result {
[INFO] [stdout]   |         ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_greeting_file`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `other_error`
[INFO] [stdout]   --> errors/src/main.rs:15:13
[INFO] [stdout]    |
[INFO] [stdout] 15 |             other_error => {
[INFO] [stdout]    |             ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_other_error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `greeting_file`
[INFO] [stdout]   --> errors/src/main.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |     let greeting_file = File::open("hello.txt").unwrap();
[INFO] [stdout]    |         ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_greeting_file`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `greeting_file`
[INFO] [stdout]   --> errors/src/main.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let greeting_file =
[INFO] [stdout]    |         ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_greeting_file`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `order1`
[INFO] [stdout]   --> restaurant/src/lib.rs:30:9
[INFO] [stdout]    |
[INFO] [stdout] 30 |     let order1 = back_of_house::Appetizer::Soup;
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_order1`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `order2`
[INFO] [stdout]   --> restaurant/src/lib.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let order2 = back_of_house::Appetizer::Salad;
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_order2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_username_from_file` is never used
[INFO] [stdout]   --> errors/src/main.rs:28:4
[INFO] [stdout]    |
[INFO] [stdout] 28 | fn read_username_from_file() -> Result<String, io::Error> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `deliver_order` is never used
[INFO] [stdout]   --> restaurant/src/lib.rs:34:4
[INFO] [stdout]    |
[INFO] [stdout] 34 | fn deliver_order() {}
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `seat_at_table` is never used
[INFO] [stdout]  --> restaurant/src/lib.rs:5:16
[INFO] [stdout]   |
[INFO] [stdout] 5 |         pub fn seat_at_table() {}
[INFO] [stdout]   |                ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `take_order` is never used
[INFO] [stdout]  --> restaurant/src/lib.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 |         fn take_order() {}
[INFO] [stdout]   |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_username_from_file_short` is never used
[INFO] [stdout]   --> errors/src/main.rs:44:4
[INFO] [stdout]    |
[INFO] [stdout] 44 | fn read_username_from_file_short() -> Result<String, io::Error> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `serve_order` is never used
[INFO] [stdout]   --> restaurant/src/lib.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 11 |         fn serve_order() {}
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `take_payment` is never used
[INFO] [stdout]   --> restaurant/src/lib.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 |         fn take_payment() {}
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_username_from_file_short_chaining` is never used
[INFO] [stdout]   --> errors/src/main.rs:51:4
[INFO] [stdout]    |
[INFO] [stdout] 51 | fn read_username_from_file_short_chaining() -> Result<String, io::Error> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `fix_incorrect_order` is never used
[INFO] [stdout]   --> restaurant/src/lib.rs:37:8
[INFO] [stdout]    |
[INFO] [stdout] 37 |     fn fix_incorrect_order() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `cook_order` is never used
[INFO] [stdout]   --> restaurant/src/lib.rs:42:8
[INFO] [stdout]    |
[INFO] [stdout] 42 |     fn cook_order() {}
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_username_from_file_shortest` is never used
[INFO] [stdout]   --> errors/src/main.rs:59:4
[INFO] [stdout]    |
[INFO] [stdout] 59 | fn read_username_from_file_shortest() -> Result<String, io::Error> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `last_char_first_line` is never used
[INFO] [stdout]   --> errors/src/main.rs:63:4
[INFO] [stdout]    |
[INFO] [stdout] 63 | fn last_char_first_line(text: &str) -> Option<char> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `seasonal_fruit` is never read
[INFO] [stdout]   --> restaurant/src/lib.rs:47:9
[INFO] [stdout]    |
[INFO] [stdout] 45 |     pub struct Breakfast {
[INFO] [stdout]    |                --------- field in this struct
[INFO] [stdout] 46 |         pub toast: String,
[INFO] [stdout] 47 |         seasonal_fruit: String,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `order1`
[INFO] [stdout]   --> restaurant/src/lib.rs:30:9
[INFO] [stdout]    |
[INFO] [stdout] 30 |     let order1 = back_of_house::Appetizer::Soup;
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_order1`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `order2`
[INFO] [stdout]   --> restaurant/src/lib.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let order2 = back_of_house::Appetizer::Salad;
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_order2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `deliver_order` is never used
[INFO] [stdout]   --> restaurant/src/lib.rs:34:4
[INFO] [stdout]    |
[INFO] [stdout] 34 | fn deliver_order() {}
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `seat_at_table` is never used
[INFO] [stdout]  --> restaurant/src/lib.rs:5:16
[INFO] [stdout]   |
[INFO] [stdout] 5 |         pub fn seat_at_table() {}
[INFO] [stdout]   |                ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `take_order` is never used
[INFO] [stdout]  --> restaurant/src/lib.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 |         fn take_order() {}
[INFO] [stdout]   |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `serve_order` is never used
[INFO] [stdout]   --> restaurant/src/lib.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 11 |         fn serve_order() {}
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `take_payment` is never used
[INFO] [stdout]   --> restaurant/src/lib.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 |         fn take_payment() {}
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `fix_incorrect_order` is never used
[INFO] [stdout]   --> restaurant/src/lib.rs:37:8
[INFO] [stdout]    |
[INFO] [stdout] 37 |     fn fix_incorrect_order() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `cook_order` is never used
[INFO] [stdout]   --> restaurant/src/lib.rs:42:8
[INFO] [stdout]    |
[INFO] [stdout] 42 |     fn cook_order() {}
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `seasonal_fruit` is never read
[INFO] [stdout]   --> restaurant/src/lib.rs:47:9
[INFO] [stdout]    |
[INFO] [stdout] 45 |     pub struct Breakfast {
[INFO] [stdout]    |                --------- field in this struct
[INFO] [stdout] 46 |         pub toast: String,
[INFO] [stdout] 47 |         seasonal_fruit: String,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking mutex v0.1.0 (/opt/rustwide/workdir/mutex)
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `r`
[INFO] [stdout]   --> unsafe_rust/src/main.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let r = address as *const i32;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_r`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `split_at_mut` is never used
[INFO] [stdout]   --> unsafe_rust/src/main.rs:48:4
[INFO] [stdout]    |
[INFO] [stdout] 48 | fn split_at_mut(values: &mut [i32], mid: usize) -> (&mut [i32], &mut [i32]) {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]  --> vectors/src/main.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 2 |     let v: Vec<i32> = Vec::new();
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `row`
[INFO] [stdout]   --> vectors/src/main.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 34 |     let row = vec![
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_row`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> lifetimes/src/main.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let i = ImportantExcerpt {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> vectors/src/main.rs:29:13
[INFO] [stdout]    |
[INFO] [stdout] 29 |         Int(i32),
[INFO] [stdout]    |         --- ^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[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] 29 |         Int(()),
[INFO] [stdout]    |             ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> vectors/src/main.rs:30:15
[INFO] [stdout]    |
[INFO] [stdout] 30 |         Float(f64),
[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] 30 |         Float(()),
[INFO] [stdout]    |               ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> vectors/src/main.rs:31:14
[INFO] [stdout]    |
[INFO] [stdout] 31 |         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] 31 |         Text(()),
[INFO] [stdout]    |              ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `baby_name` is never used
[INFO] [stdout]   --> advanced_traits/src/main.rs:67:8
[INFO] [stdout]    |
[INFO] [stdout] 66 | impl Dog {
[INFO] [stdout]    | -------- associated function in this implementation
[INFO] [stdout] 67 |     fn baby_name() -> String {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `part` is never read
[INFO] [stdout]   --> lifetimes/src/main.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 30 | struct ImportantExcerpt<'a> {
[INFO] [stdout]    |        ---------------- field in this struct
[INFO] [stdout] 31 |     part: &'a str,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `just_str` is never used
[INFO] [stdout]   --> lifetimes/src/main.rs:51:4
[INFO] [stdout]    |
[INFO] [stdout] 51 | fn just_str<'a>() -> &'a str {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking hello_macro_derive v0.1.0 (/opt/rustwide/workdir/hello_macro/hello_macro_derive)
[INFO] [stderr]     Checking pancakes v0.1.0 (/opt/rustwide/workdir/pancakes)
[INFO] [stderr]     Finished `dev` profile [optimized + debuginfo] target(s) in 2.10s
[INFO] running `Command { std: "docker" "inspect" "8a90c920e17e1cd2edbffb312fd86d6f74e61c69c77857f63fb0f7d9626fe627", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8a90c920e17e1cd2edbffb312fd86d6f74e61c69c77857f63fb0f7d9626fe627", kill_on_drop: false }`
[INFO] [stdout] 8a90c920e17e1cd2edbffb312fd86d6f74e61c69c77857f63fb0f7d9626fe627