[INFO] cloning repository https://github.com/ymcvalu/learn-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ymcvalu/learn-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fymcvalu%2Flearn-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fymcvalu%2Flearn-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 64b3e05f726aaa2ea744206274321eb9f6af8a84
[INFO] checking ymcvalu/learn-rs against master#2d3a85b4f8ba7e2554f4d4fee126bc2ac6ee2af4 for pr-84385
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fymcvalu%2Flearn-rs" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ymcvalu/learn-rs on toolchain 2d3a85b4f8ba7e2554f4d4fee126bc2ac6ee2af4
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+2d3a85b4f8ba7e2554f4d4fee126bc2ac6ee2af4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ymcvalu/learn-rs
[INFO] finished tweaking git repo https://github.com/ymcvalu/learn-rs
[INFO] tweaked toml for git repo https://github.com/ymcvalu/learn-rs written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/ymcvalu/learn-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+2d3a85b4f8ba7e2554f4d4fee126bc2ac6ee2af4" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:3d1cd00eb6e6ea2a7969240779edeaeff35b24be85036c63b883ba933028a15f" "/opt/rustwide/cargo-home/bin/cargo" "+2d3a85b4f8ba7e2554f4d4fee126bc2ac6ee2af4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7884ea7a00d297bee9d6d71be9faec27d773a70e927f43267f823bab8168725a
[INFO] running `Command { std: "docker" "start" "-a" "7884ea7a00d297bee9d6d71be9faec27d773a70e927f43267f823bab8168725a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7884ea7a00d297bee9d6d71be9faec27d773a70e927f43267f823bab8168725a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7884ea7a00d297bee9d6d71be9faec27d773a70e927f43267f823bab8168725a", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:3d1cd00eb6e6ea2a7969240779edeaeff35b24be85036c63b883ba933028a15f" "/opt/rustwide/cargo-home/bin/cargo" "+2d3a85b4f8ba7e2554f4d4fee126bc2ac6ee2af4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "start" "-a" "d1b7f488983b50429bcb5ae16356f209ff3495e14e10b2f09cfae76be91299ab", kill_on_drop: false }`
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[INFO] [stdout] warning: unused import: `std::borrow::Borrow`
[INFO] [stdout]  --> linkedlist/src/list.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::borrow::Borrow;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around match arm expression
[INFO] [stdout]  --> basic/src/bin/match.rs:8:40
[INFO] [stdout]   |
[INFO] [stdout] 8 |         Event::Action { dir, step } => (println!("dir {}, step {}", dir, step)),
[INFO] [stdout]   |                                        ^                                      ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]   |
[INFO] [stdout] 8 -         Event::Action { dir, step } => (println!("dir {}, step {}", dir, step)),
[INFO] [stdout] 8 +         Event::Action { dir, step } => println!("dir {}, step {}", dir, step),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around match arm expression
[INFO] [stdout]  --> basic/src/bin/match.rs:9:31
[INFO] [stdout]   |
[INFO] [stdout] 9 |         Event::Attack(dir) => (println!("attack toward {}", dir)),
[INFO] [stdout]   |                               ^                                 ^
[INFO] [stdout]   |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]   |
[INFO] [stdout] 9 -         Event::Attack(dir) => (println!("attack toward {}", dir)),
[INFO] [stdout] 9 +         Event::Attack(dir) => println!("attack toward {}", dir),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around match arm expression
[INFO] [stdout]   --> basic/src/bin/match.rs:10:14
[INFO] [stdout]    |
[INFO] [stdout] 10 |         _ => (println!("stop!")),
[INFO] [stdout]    |              ^                 ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 10 -         _ => (println!("stop!")),
[INFO] [stdout] 10 +         _ => println!("stop!"),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Left`, `Up` and `Down` are never constructed
[INFO] [stdout]   --> basic/src/bin/match.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 20 | enum Dir {
[INFO] [stdout]    |      --- variants in this enum
[INFO] [stdout] 21 |     Left = 1,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 22 |     Right = 2,
[INFO] [stdout] 23 |     Up = 3,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 24 |     Down = 4,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Dir` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Attack` and `Stop` are never constructed
[INFO] [stdout]   --> basic/src/bin/match.rs:28:5
[INFO] [stdout]    |
[INFO] [stdout] 26 | enum Event {
[INFO] [stdout]    |      ----- variants in this enum
[INFO] [stdout] 27 |     Action { dir: Dir, step: i32 },
[INFO] [stdout] 28 |     Attack(Dir),
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 29 |     Stop,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `api` should have an upper camel case name
[INFO] [stdout]   --> basic/src/bin/trait.rs:54:8
[INFO] [stdout]    |
[INFO] [stdout] 54 | struct api;
[INFO] [stdout]    |        ^^^ help: convert the identifier to upper camel case: `Api`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `iter::Copied`
[INFO] [stdout]    --> basic/src/bin/trait.rs:137:23
[INFO] [stdout]     |
[INFO] [stdout] 137 | use std::{fmt::Debug, iter::Copied, ops::Add};
[INFO] [stdout]     |                       ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `maker` should have an upper camel case name
[INFO] [stdout]    --> basic/src/bin/trait.rs:202:8
[INFO] [stdout]     |
[INFO] [stdout] 202 | struct maker;
[INFO] [stdout]     |        ^^^^^ help: convert the identifier to upper camel case: `Maker`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `m1`
[INFO] [stdout]    --> basic/src/bin/trait.rs:229:9
[INFO] [stdout]     |
[INFO] [stdout] 229 |     let m1 = maker {};
[INFO] [stdout]     |         ^^ help: if this is intentional, prefix it with an underscore: `_m1`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `maker_demo` is never used
[INFO] [stdout]    --> basic/src/bin/trait.rs:227:4
[INFO] [stdout]     |
[INFO] [stdout] 227 | fn maker_demo() {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `get_inst` is never used
[INFO] [stdout]    --> basic/src/bin/trait.rs:205:8
[INFO] [stdout]     |
[INFO] [stdout] 205 |     fn get_inst() -> String {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `address` is never read
[INFO] [stdout]  --> basic/src/bin/type_struct.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Person {
[INFO] [stdout]   |        ------ field in this struct
[INFO] [stdout] 3 |     name: String,
[INFO] [stdout] 4 |     address: String,
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Person` 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] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `d1`
[INFO] [stdout]   --> basic/src/bin/drop.rs:28:9
[INFO] [stdout]    |
[INFO] [stdout] 28 |     let d1 = DropDemo {
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_d1`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `item` is never read
[INFO] [stdout]  --> basic/src/bin/drop.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct DropDemo {
[INFO] [stdout]   |        -------- field in this struct
[INFO] [stdout] 4 |     tag: String,
[INFO] [stdout] 5 |     item: DropItem,
[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: unused return value of `Box::<T>::from_raw` that must be used
[INFO] [stdout]   --> basic/src/bin/drop.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |         Box::from_raw(leak_ptr);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: call `drop(from_raw(ptr))` if you intend to drop the `Box`
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking axum v0.2.8
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `p`
[INFO] [stdout]   --> basic/src/bin/turbofish.rs:27:13
[INFO] [stdout]    |
[INFO] [stdout] 27 |     fn cook(p: &Potato) -> Self {
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_p`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `p`
[INFO] [stdout]   --> basic/src/bin/turbofish.rs:40:13
[INFO] [stdout]    |
[INFO] [stdout] 40 |     fn cook(p: &Potato) -> Self {
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_p`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `p`
[INFO] [stdout]   --> basic/src/bin/toy_allocator.rs:28:9
[INFO] [stdout]    |
[INFO] [stdout] 28 |     let p = Box::new(p);
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_p`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `child` is never read
[INFO] [stdout]   --> basic/src/bin/toy_allocator.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 31 | struct Parent {
[INFO] [stdout]    |        ------ field in this struct
[INFO] [stdout] 32 |     child: Box<Child>,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `str` is never read
[INFO] [stdout]   --> basic/src/bin/toy_allocator.rs:36:5
[INFO] [stdout]    |
[INFO] [stdout] 35 | struct Child {
[INFO] [stdout]    |        ----- field in this struct
[INFO] [stdout] 36 |     str: String,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `TcpListener`
[INFO] [stdout]  --> basic/src/bin/generics.rs:4:16
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::net::{TcpListener, TcpStream};
[INFO] [stdout]   |                ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `addr`
[INFO] [stdout]   --> basic/src/bin/generics.rs:12:16
[INFO] [stdout]    |
[INFO] [stdout] 12 |     pub fn new(addr: &str) -> Self {
[INFO] [stdout]    |                ^^^^ help: if this is intentional, prefix it with an underscore: `_addr`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `us`
[INFO] [stdout]   --> basic/src/bin/generics.rs:87:9
[INFO] [stdout]    |
[INFO] [stdout] 87 |     let us = UnSizedDemo::<str> { r: &s };
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_us`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Reader` is never constructed
[INFO] [stdout]   --> basic/src/bin/generics.rs:32:8
[INFO] [stdout]    |
[INFO] [stdout] 32 | struct Reader<R> {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `G` is never constructed
[INFO] [stdout]   --> basic/src/bin/generics.rs:64:8
[INFO] [stdout]    |
[INFO] [stdout] 64 | struct G<T: Api<O = i32>> {
[INFO] [stdout]    |        ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `UnSizedDemo` is never constructed
[INFO] [stdout]   --> basic/src/bin/generics.rs:76:8
[INFO] [stdout]    |
[INFO] [stdout] 76 | struct UnSizedDemo<'a, T: 'a + ?Sized> {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `SizedDemo` is never constructed
[INFO] [stdout]   --> basic/src/bin/generics.rs:80:8
[INFO] [stdout]    |
[INFO] [stdout] 80 | struct SizedDemo<'a, T: 'a> {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_unsizedDemo` is never used
[INFO] [stdout]   --> basic/src/bin/generics.rs:84:4
[INFO] [stdout]    |
[INFO] [stdout] 84 | fn test_unsizedDemo() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> basic/src/bin/generics.rs:38:8
[INFO] [stdout]    |
[INFO] [stdout] 38 |     fn new(reader: R) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `process` is never used
[INFO] [stdout]   --> basic/src/bin/generics.rs:50:8
[INFO] [stdout]    |
[INFO] [stdout] 50 |     fn process(&mut self) -> Result<usize> {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `do_something` is never used
[INFO] [stdout]   --> basic/src/bin/generics.rs:69:8
[INFO] [stdout]    |
[INFO] [stdout] 69 |     fn do_something() -> <T as Api>::O {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> basic/src/bin/generics.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 26 |     writer.write("hello world!");
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_unsizedDemo` should have a snake case name
[INFO] [stdout]   --> basic/src/bin/generics.rs:84:4
[INFO] [stdout]    |
[INFO] [stdout] 84 | fn test_unsizedDemo() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `test_unsized_demo`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `p`
[INFO] [stdout]   --> basic/src/bin/toy_allocator.rs:28:9
[INFO] [stdout]    |
[INFO] [stdout] 28 |     let p = Box::new(p);
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_p`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `child` is never read
[INFO] [stdout]   --> basic/src/bin/toy_allocator.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 31 | struct Parent {
[INFO] [stdout]    |        ------ field in this struct
[INFO] [stdout] 32 |     child: Box<Child>,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `str` is never read
[INFO] [stdout]   --> basic/src/bin/toy_allocator.rs:36:5
[INFO] [stdout]    |
[INFO] [stdout] 35 | struct Child {
[INFO] [stdout]    |        ----- field in this struct
[INFO] [stdout] 36 |     str: String,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `p`
[INFO] [stdout]   --> basic/src/bin/turbofish.rs:27:13
[INFO] [stdout]    |
[INFO] [stdout] 27 |     fn cook(p: &Potato) -> Self {
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_p`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `p`
[INFO] [stdout]   --> basic/src/bin/turbofish.rs:40:13
[INFO] [stdout]    |
[INFO] [stdout] 40 |     fn cook(p: &Potato) -> Self {
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_p`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]  --> basic/src/bin/partial_move.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let name = p.name; // partial move
[INFO] [stdout]   |         ^^^^ help: if this is intentional, prefix it with an underscore: `_name`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `sholud_use` that must be used
[INFO] [stdout]  --> basic/src/bin/attr.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     sholud_use(); // 方法有`must_use`属性，如果返回值没有被使用会产生warning
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: the return value shoud used
[INFO] [stdout]   = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `addrref`
[INFO] [stdout]   --> basic/src/bin/partial_move.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let addrref = &p.address; // borrow other field is ok
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_addrref`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pref`
[INFO] [stdout]   --> basic/src/bin/partial_move.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let pref = &p; // we can borrow from p after reassigned
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_pref`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `obj`
[INFO] [stdout]   --> basic/src/bin/partial_move.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let obj = DropObj { name: "obj".into() };
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_obj`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `name` is never read
[INFO] [stdout]   --> basic/src/bin/partial_move.rs:28:5
[INFO] [stdout]    |
[INFO] [stdout] 27 | struct DropObj {
[INFO] [stdout]    |        ------- field in this struct
[INFO] [stdout] 28 |     name: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking learn-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::borrow::Borrow`
[INFO] [stdout]  --> linkedlist/src/list.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::borrow::Borrow;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `address` is never read
[INFO] [stdout]  --> basic/src/bin/type_struct.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Person {
[INFO] [stdout]   |        ------ field in this struct
[INFO] [stdout] 3 |     name: String,
[INFO] [stdout] 4 |     address: String,
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Person` 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] 
[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 `x` and `y` are never read
[INFO] [stdout]   --> basic/src/bin/borrow.rs:69:5
[INFO] [stdout]    |
[INFO] [stdout] 68 | struct Point {
[INFO] [stdout]    |        ----- fields in this struct
[INFO] [stdout] 69 |     x: i32,
[INFO] [stdout]    |     ^
[INFO] [stdout] 70 |     y: i32,
[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]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `reborrow_rule` is never used
[INFO] [stdout]   --> basic/src/bin/borrow.rs:80:4
[INFO] [stdout]    |
[INFO] [stdout] 80 | fn reborrow_rule() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `move_to` is never used
[INFO] [stdout]   --> basic/src/bin/borrow.rs:74:8
[INFO] [stdout]    |
[INFO] [stdout] 74 |     fn move_to(&mut self, x: i32, y: i32) {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]  --> basic/src/bin/partial_move.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let name = p.name; // partial move
[INFO] [stdout]   |         ^^^^ help: if this is intentional, prefix it with an underscore: `_name`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `addrref`
[INFO] [stdout]   --> basic/src/bin/partial_move.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let addrref = &p.address; // borrow other field is ok
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_addrref`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pref`
[INFO] [stdout]   --> basic/src/bin/partial_move.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let pref = &p; // we can borrow from p after reassigned
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_pref`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `obj`
[INFO] [stdout]   --> basic/src/bin/partial_move.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let obj = DropObj { name: "obj".into() };
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_obj`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `name` is never read
[INFO] [stdout]   --> basic/src/bin/partial_move.rs:28:5
[INFO] [stdout]    |
[INFO] [stdout] 27 | struct DropObj {
[INFO] [stdout]    |        ------- field in this struct
[INFO] [stdout] 28 |     name: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking clap v3.1.8
[INFO] [stdout] warning: unused return value of `sholud_use` that must be used
[INFO] [stdout]  --> basic/src/bin/attr.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     sholud_use(); // 方法有`must_use`属性，如果返回值没有被使用会产生warning
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: the return value shoud used
[INFO] [stdout]   = note: `#[warn(unused_must_use)]` on by default
[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: fields `x` and `y` are never read
[INFO] [stdout]   --> basic/src/bin/borrow.rs:69:5
[INFO] [stdout]    |
[INFO] [stdout] 68 | struct Point {
[INFO] [stdout]    |        ----- fields in this struct
[INFO] [stdout] 69 |     x: i32,
[INFO] [stdout]    |     ^
[INFO] [stdout] 70 |     y: i32,
[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]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `reborrow_rule` is never used
[INFO] [stdout]   --> basic/src/bin/borrow.rs:80:4
[INFO] [stdout]    |
[INFO] [stdout] 80 | fn reborrow_rule() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `move_to` is never used
[INFO] [stdout]   --> basic/src/bin/borrow.rs:74:8
[INFO] [stdout]    |
[INFO] [stdout] 74 |     fn move_to(&mut self, x: i32, y: i32) {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Context` is never constructed
[INFO] [stdout]  --> basic/src/bin/lifetime_subtype.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Context<'s> {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Parser` is never constructed
[INFO] [stdout]  --> basic/src/bin/lifetime_subtype.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | struct Parser<'c, 's: 'c> {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Ref` is never constructed
[INFO] [stdout]   --> basic/src/bin/lifetime_subtype.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 | struct Ref<'a, T: Send + 'a>(&'a T);
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `StaticRef` is never constructed
[INFO] [stdout]   --> basic/src/bin/lifetime_subtype.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 18 | struct StaticRef<T: 'static>(&'static T);
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `str`
[INFO] [stdout]   --> basic/src/bin/deref.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let str: String = (&ms as &str).into();
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_str`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `r`
[INFO] [stdout]   --> basic/src/bin/deref.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let r = &ms;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_r`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `id` is never read
[INFO] [stdout]  --> basic/src/bin/rc.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Node {
[INFO] [stdout]   |        ---- field in this struct
[INFO] [stdout] 6 |     id: usize,
[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]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `str` is never read
[INFO] [stdout]   --> basic/src/bin/trait_object.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 22 | struct Bean {
[INFO] [stdout]    |        ---- field in this struct
[INFO] [stdout] 23 |     str: String,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Bean` 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] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `api` should have an upper camel case name
[INFO] [stdout]   --> basic/src/bin/trait.rs:54:8
[INFO] [stdout]    |
[INFO] [stdout] 54 | struct api;
[INFO] [stdout]    |        ^^^ help: convert the identifier to upper camel case: `Api`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `iter::Copied`
[INFO] [stdout]    --> basic/src/bin/trait.rs:137:23
[INFO] [stdout]     |
[INFO] [stdout] 137 | use std::{fmt::Debug, iter::Copied, ops::Add};
[INFO] [stdout]     |                       ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Unspecified` is never constructed
[INFO] [stdout]   --> basic/src/bin/type.rs:40:5
[INFO] [stdout]    |
[INFO] [stdout] 39 | enum Gender {
[INFO] [stdout]    |      ------ variant in this enum
[INFO] [stdout] 40 |     Unspecified = 0,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Gender` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `gender` and `name` are never read
[INFO] [stdout]   --> basic/src/bin/type.rs:50:5
[INFO] [stdout]    |
[INFO] [stdout] 48 | struct User {
[INFO] [stdout]    |        ---- fields in this struct
[INFO] [stdout] 49 |     id: UserID,
[INFO] [stdout] 50 |     gender: Gender,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 51 |     name: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `User` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name` and `owner` are never read
[INFO] [stdout]   --> basic/src/bin/type.rs:60:5
[INFO] [stdout]    |
[INFO] [stdout] 58 | struct Topic {
[INFO] [stdout]    |        ----- fields in this struct
[INFO] [stdout] 59 |     id: TopicID,
[INFO] [stdout] 60 |     name: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 61 |     owner: UserID,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Topic` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `maker` should have an upper camel case name
[INFO] [stdout]    --> basic/src/bin/trait.rs:202:8
[INFO] [stdout]     |
[INFO] [stdout] 202 | struct maker;
[INFO] [stdout]     |        ^^^^^ help: convert the identifier to upper camel case: `Maker`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `item` is assigned to, but never used
[INFO] [stdout]   --> basic/src/bin/lifetime.rs:59:9
[INFO] [stdout]    |
[INFO] [stdout] 59 |     let item;
[INFO] [stdout]    |         ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_item` instead
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `item` is never read
[INFO] [stdout]   --> basic/src/bin/lifetime.rs:63:9
[INFO] [stdout]    |
[INFO] [stdout] 63 |         item = Item {
[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: function `struct_demo` is never used
[INFO] [stdout]   --> basic/src/bin/lifetime.rs:58:4
[INFO] [stdout]    |
[INFO] [stdout] 58 | fn struct_demo() {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `m1`
[INFO] [stdout]    --> basic/src/bin/trait.rs:229:9
[INFO] [stdout]     |
[INFO] [stdout] 229 |     let m1 = maker {};
[INFO] [stdout]     |         ^^ help: if this is intentional, prefix it with an underscore: `_m1`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Item` is never constructed
[INFO] [stdout]   --> basic/src/bin/lifetime.rs:80:8
[INFO] [stdout]    |
[INFO] [stdout] 80 | struct Item<'a, 'b> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `maker_demo` is never used
[INFO] [stdout]    --> basic/src/bin/trait.rs:227:4
[INFO] [stdout]     |
[INFO] [stdout] 227 | fn maker_demo() {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `get_inst` is never used
[INFO] [stdout]    --> basic/src/bin/trait.rs:205:8
[INFO] [stdout]     |
[INFO] [stdout] 205 |     fn get_inst() -> String {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Context` is never constructed
[INFO] [stdout]  --> basic/src/bin/lifetime_subtype.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Context<'s> {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Parser` is never constructed
[INFO] [stdout]  --> basic/src/bin/lifetime_subtype.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | struct Parser<'c, 's: 'c> {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Ref` is never constructed
[INFO] [stdout]   --> basic/src/bin/lifetime_subtype.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 | struct Ref<'a, T: Send + 'a>(&'a T);
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `StaticRef` is never constructed
[INFO] [stdout]   --> basic/src/bin/lifetime_subtype.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 18 | struct StaticRef<T: 'static>(&'static T);
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `d1`
[INFO] [stdout]   --> basic/src/bin/drop.rs:28:9
[INFO] [stdout]    |
[INFO] [stdout] 28 |     let d1 = DropDemo {
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_d1`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `item` is never read
[INFO] [stdout]  --> basic/src/bin/drop.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct DropDemo {
[INFO] [stdout]   |        -------- field in this struct
[INFO] [stdout] 4 |     tag: String,
[INFO] [stdout] 5 |     item: DropItem,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around match arm expression
[INFO] [stdout]  --> basic/src/bin/match.rs:8:40
[INFO] [stdout]   |
[INFO] [stdout] 8 |         Event::Action { dir, step } => (println!("dir {}, step {}", dir, step)),
[INFO] [stdout]   |                                        ^                                      ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]   |
[INFO] [stdout] 8 -         Event::Action { dir, step } => (println!("dir {}, step {}", dir, step)),
[INFO] [stdout] 8 +         Event::Action { dir, step } => println!("dir {}, step {}", dir, step),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around match arm expression
[INFO] [stdout]  --> basic/src/bin/match.rs:9:31
[INFO] [stdout]   |
[INFO] [stdout] 9 |         Event::Attack(dir) => (println!("attack toward {}", dir)),
[INFO] [stdout]   |                               ^                                 ^
[INFO] [stdout]   |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]   |
[INFO] [stdout] 9 -         Event::Attack(dir) => (println!("attack toward {}", dir)),
[INFO] [stdout] 9 +         Event::Attack(dir) => println!("attack toward {}", dir),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around match arm expression
[INFO] [stdout]   --> basic/src/bin/match.rs:10:14
[INFO] [stdout]    |
[INFO] [stdout] 10 |         _ => (println!("stop!")),
[INFO] [stdout]    |              ^                 ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 10 -         _ => (println!("stop!")),
[INFO] [stdout] 10 +         _ => println!("stop!"),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Box::<T>::from_raw` that must be used
[INFO] [stdout]   --> basic/src/bin/drop.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |         Box::from_raw(leak_ptr);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: call `drop(from_raw(ptr))` if you intend to drop the `Box`
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `item` is assigned to, but never used
[INFO] [stdout]   --> basic/src/bin/lifetime.rs:59:9
[INFO] [stdout]    |
[INFO] [stdout] 59 |     let item;
[INFO] [stdout]    |         ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_item` instead
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `TcpListener`
[INFO] [stdout]  --> basic/src/bin/generics.rs:4:16
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::net::{TcpListener, TcpStream};
[INFO] [stdout]   |                ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `item` is never read
[INFO] [stdout]   --> basic/src/bin/lifetime.rs:63:9
[INFO] [stdout]    |
[INFO] [stdout] 63 |         item = Item {
[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: function `struct_demo` is never used
[INFO] [stdout]   --> basic/src/bin/lifetime.rs:58:4
[INFO] [stdout]    |
[INFO] [stdout] 58 | fn struct_demo() {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Item` is never constructed
[INFO] [stdout]   --> basic/src/bin/lifetime.rs:80:8
[INFO] [stdout]    |
[INFO] [stdout] 80 | struct Item<'a, 'b> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `addr`
[INFO] [stdout]   --> basic/src/bin/generics.rs:12:16
[INFO] [stdout]    |
[INFO] [stdout] 12 |     pub fn new(addr: &str) -> Self {
[INFO] [stdout]    |                ^^^^ help: if this is intentional, prefix it with an underscore: `_addr`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Left`, `Up` and `Down` are never constructed
[INFO] [stdout]   --> basic/src/bin/match.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 20 | enum Dir {
[INFO] [stdout]    |      --- variants in this enum
[INFO] [stdout] 21 |     Left = 1,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 22 |     Right = 2,
[INFO] [stdout] 23 |     Up = 3,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 24 |     Down = 4,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Dir` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Attack` and `Stop` are never constructed
[INFO] [stdout]   --> basic/src/bin/match.rs:28:5
[INFO] [stdout]    |
[INFO] [stdout] 26 | enum Event {
[INFO] [stdout]    |      ----- variants in this enum
[INFO] [stdout] 27 |     Action { dir: Dir, step: i32 },
[INFO] [stdout] 28 |     Attack(Dir),
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 29 |     Stop,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `us`
[INFO] [stdout]   --> basic/src/bin/generics.rs:87:9
[INFO] [stdout]    |
[INFO] [stdout] 87 |     let us = UnSizedDemo::<str> { r: &s };
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_us`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Reader` is never constructed
[INFO] [stdout]   --> basic/src/bin/generics.rs:32:8
[INFO] [stdout]    |
[INFO] [stdout] 32 | struct Reader<R> {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `G` is never constructed
[INFO] [stdout]   --> basic/src/bin/generics.rs:64:8
[INFO] [stdout]    |
[INFO] [stdout] 64 | struct G<T: Api<O = i32>> {
[INFO] [stdout]    |        ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `UnSizedDemo` is never constructed
[INFO] [stdout]   --> basic/src/bin/generics.rs:76:8
[INFO] [stdout]    |
[INFO] [stdout] 76 | struct UnSizedDemo<'a, T: 'a + ?Sized> {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `SizedDemo` is never constructed
[INFO] [stdout]   --> basic/src/bin/generics.rs:80:8
[INFO] [stdout]    |
[INFO] [stdout] 80 | struct SizedDemo<'a, T: 'a> {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_unsizedDemo` is never used
[INFO] [stdout]   --> basic/src/bin/generics.rs:84:4
[INFO] [stdout]    |
[INFO] [stdout] 84 | fn test_unsizedDemo() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> basic/src/bin/generics.rs:38:8
[INFO] [stdout]    |
[INFO] [stdout] 38 |     fn new(reader: R) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `process` is never used
[INFO] [stdout]   --> basic/src/bin/generics.rs:50:8
[INFO] [stdout]    |
[INFO] [stdout] 50 |     fn process(&mut self) -> Result<usize> {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `do_something` is never used
[INFO] [stdout]   --> basic/src/bin/generics.rs:69:8
[INFO] [stdout]    |
[INFO] [stdout] 69 |     fn do_something() -> <T as Api>::O {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> basic/src/bin/generics.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 26 |     writer.write("hello world!");
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_unsizedDemo` should have a snake case name
[INFO] [stdout]   --> basic/src/bin/generics.rs:84:4
[INFO] [stdout]    |
[INFO] [stdout] 84 | fn test_unsizedDemo() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `test_unsized_demo`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `v` is never read
[INFO] [stdout]   --> basic/src/bin/shadow.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct MyString {
[INFO] [stdout]    |        -------- field in this struct
[INFO] [stdout] 13 |     v: String,
[INFO] [stdout]    |     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `MyString` 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] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `str`
[INFO] [stdout]   --> basic/src/bin/deref.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let str: String = (&ms as &str).into();
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_str`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `r`
[INFO] [stdout]   --> basic/src/bin/deref.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let r = &ms;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_r`
[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: field `v` is never read
[INFO] [stdout]   --> basic/src/bin/shadow.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct MyString {
[INFO] [stdout]    |        -------- field in this struct
[INFO] [stdout] 13 |     v: String,
[INFO] [stdout]    |     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `MyString` 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] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `id` is never read
[INFO] [stdout]  --> basic/src/bin/rc.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Node {
[INFO] [stdout]   |        ---- field in this struct
[INFO] [stdout] 6 |     id: usize,
[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]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Unspecified` is never constructed
[INFO] [stdout]   --> basic/src/bin/type.rs:40:5
[INFO] [stdout]    |
[INFO] [stdout] 39 | enum Gender {
[INFO] [stdout]    |      ------ variant in this enum
[INFO] [stdout] 40 |     Unspecified = 0,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Gender` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `gender` and `name` are never read
[INFO] [stdout]   --> basic/src/bin/type.rs:50:5
[INFO] [stdout]    |
[INFO] [stdout] 48 | struct User {
[INFO] [stdout]    |        ---- fields in this struct
[INFO] [stdout] 49 |     id: UserID,
[INFO] [stdout] 50 |     gender: Gender,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 51 |     name: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `User` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name` and `owner` are never read
[INFO] [stdout]   --> basic/src/bin/type.rs:60:5
[INFO] [stdout]    |
[INFO] [stdout] 58 | struct Topic {
[INFO] [stdout]    |        ----- fields in this struct
[INFO] [stdout] 59 |     id: TopicID,
[INFO] [stdout] 60 |     name: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 61 |     owner: UserID,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Topic` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking photon-rs v0.3.1
[INFO] [stdout] warning: field `str` is never read
[INFO] [stdout]   --> basic/src/bin/trait_object.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 22 | struct Bean {
[INFO] [stdout]    |        ---- field in this struct
[INFO] [stdout] 23 |     str: String,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Bean` 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] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking httpie v0.1.0 (/opt/rustwide/workdir/httpie)
[INFO] [stderr]    Compiling logos-derive v0.12.0
[INFO] [stderr]     Checking logos v0.12.0
[INFO] [stderr]     Checking logos_demo v0.1.0 (/opt/rustwide/workdir/logos_demo)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 00s
[INFO] running `Command { std: "docker" "inspect" "d1b7f488983b50429bcb5ae16356f209ff3495e14e10b2f09cfae76be91299ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d1b7f488983b50429bcb5ae16356f209ff3495e14e10b2f09cfae76be91299ab", kill_on_drop: false }`
[INFO] [stdout] d1b7f488983b50429bcb5ae16356f209ff3495e14e10b2f09cfae76be91299ab