[INFO] cloning repository https://github.com/VrMolodyakov/rust-practice
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/VrMolodyakov/rust-practice" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVrMolodyakov%2Frust-practice", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVrMolodyakov%2Frust-practice'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e10aaf65f97eda8583da3021af4298703e0ea77b
[INFO] testing VrMolodyakov/rust-practice against beta-2026-03-05 for beta-1.95-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVrMolodyakov%2Frust-practice" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/VrMolodyakov/rust-practice
[INFO] finished tweaking git repo https://github.com/VrMolodyakov/rust-practice
[INFO] tweaked toml for git repo https://github.com/VrMolodyakov/rust-practice written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/VrMolodyakov/rust-practice on toolchain beta-2026-03-05
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-03-05" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/VrMolodyakov/rust-practice 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" "+beta-2026-03-05" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-03-05" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b6bbc7df45b3f598be2a9a88fbb7bc3ef1db6765e0a8df5f597d14138012115c
[INFO] running `Command { std: "docker" "start" "-a" "b6bbc7df45b3f598be2a9a88fbb7bc3ef1db6765e0a8df5f597d14138012115c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b6bbc7df45b3f598be2a9a88fbb7bc3ef1db6765e0a8df5f597d14138012115c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b6bbc7df45b3f598be2a9a88fbb7bc3ef1db6765e0a8df5f597d14138012115c", kill_on_drop: false }`
[INFO] [stdout] b6bbc7df45b3f598be2a9a88fbb7bc3ef1db6765e0a8df5f597d14138012115c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-03-05" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fa18af7b666cd3ee1af4cc1ff0f528897ae44f3671d084adae9aba96a1063314
[INFO] running `Command { std: "docker" "start" "-a" "fa18af7b666cd3ee1af4cc1ff0f528897ae44f3671d084adae9aba96a1063314", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.139
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.51
[INFO] [stderr]    Compiling unicode-ident v1.0.6
[INFO] [stderr]    Compiling quote v1.0.23
[INFO] [stderr]    Compiling syn v1.0.107
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling parking_lot_core v0.9.7
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling smallvec v1.10.0
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling serde v1.0.152
[INFO] [stderr]    Compiling ppv-lite86 v0.2.17
[INFO] [stderr]    Compiling bytes v1.4.0
[INFO] [stderr]    Compiling pin-project-lite v0.2.9
[INFO] [stderr]    Compiling lock_api v0.4.9
[INFO] [stderr]    Compiling tokio v1.25.0
[INFO] [stderr]    Compiling getrandom v0.2.8
[INFO] [stderr]    Compiling num_cpus v1.15.0
[INFO] [stderr]    Compiling signal-hook-registry v1.4.0
[INFO] [stderr]    Compiling mio v0.8.5
[INFO] [stderr]    Compiling socket2 v0.4.7
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling parking_lot v0.12.1
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling tokio-macros v1.8.2
[INFO] [stderr]    Compiling rust-practice v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: type `foo` should have an upper camel case name
[INFO] [stdout]   --> src/func.rs:37:8
[INFO] [stdout]    |
[INFO] [stdout] 37 | struct foo{
[INFO] [stdout]    |        ^^^ help: convert the identifier to upper camel case (notice the capitalization): `Foo`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_camel_case_types)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]  --> src/func.rs:8:15
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn closure<F>(f:F)
[INFO] [stdout]   |               ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/pin.rs:14:13
[INFO] [stdout]    |
[INFO] [stdout] 14 |         let x = self.f.as_mut();
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `until_char` is never used
[INFO] [stdout]   --> src/strsplit.rs:55:4
[INFO] [stdout]    |
[INFO] [stdout] 55 | fn until_char(str:&str,c:char) -> &'_ str{
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Exml` is never constructed
[INFO] [stdout]   --> src/dispatch.rs:49:8
[INFO] [stdout]    |
[INFO] [stdout] 49 | struct Exml{
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `bar` is never used
[INFO] [stdout]  --> src/func.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn bar<T> (){}
[INFO] [stdout]   |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `call_fn` is never used
[INFO] [stdout]  --> src/func.rs:4:4
[INFO] [stdout]   |
[INFO] [stdout] 4 | fn call_fn(f:fn()){
[INFO] [stdout]   |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `closure` is never used
[INFO] [stdout]  --> src/func.rs:8:4
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn closure<F>(f:F)
[INFO] [stdout]   |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `take_by_ref` is never used
[INFO] [stdout]   --> src/func.rs:32:4
[INFO] [stdout]    |
[INFO] [stdout] 32 | fn take_by_ref(i:&i32){
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `foo` is never constructed
[INFO] [stdout]   --> src/func.rs:37:8
[INFO] [stdout]    |
[INFO] [stdout] 37 | struct foo{
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `take_struct_by_ref` is never used
[INFO] [stdout]   --> src/func.rs:42:4
[INFO] [stdout]    |
[INFO] [stdout] 42 | fn take_struct_by_ref(f:&foo){
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `RefHolder` is never constructed
[INFO] [stdout]   --> src/func.rs:47:8
[INFO] [stdout]    |
[INFO] [stdout] 47 | struct RefHolder<'a> {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/func.rs:52:8
[INFO] [stdout]    |
[INFO] [stdout] 51 | impl<'a> RefHolder<'a> {
[INFO] [stdout]    | ---------------------- associated function in this implementation
[INFO] [stdout] 52 |     fn new(x: &'a i64) -> RefHolder<'a> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Ready` is never constructed
[INFO] [stdout]  --> src/pin.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Ready<T>{
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MyFuture` is never constructed
[INFO] [stdout]  --> src/pin.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | struct MyFuture<F>{
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_t` is never used
[INFO] [stdout]   --> src/pin.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl<F> MyFuture<F>{
[INFO] [stdout]    | ------------------- method in this implementation
[INFO] [stdout] 13 |     fn get_t(&mut self){
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `LOCKED` is never used
[INFO] [stdout]  --> src/atomics.rs:3:7
[INFO] [stdout]   |
[INFO] [stdout] 3 | const LOCKED:bool = true;
[INFO] [stdout]   |       ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `locked` and `v` are never read
[INFO] [stdout]  --> src/atomics.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub struct Mutex<T>{
[INFO] [stdout]   |            ----- fields in this struct
[INFO] [stdout] 8 |     locked: AtomicBool,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 9 |     v:UnsafeCell<T>
[INFO] [stdout]   |     ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `with_lock` is never used
[INFO] [stdout]   --> src/atomics.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl<T> Mutex<T>{
[INFO] [stdout]    | ---------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 21 |     fn with_lock<R>(&self,f:impl FnOnce(&mut T) -> R) ->R{
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `channel` is never used
[INFO] [stdout]   --> src/channel.rs:83:4
[INFO] [stdout]    |
[INFO] [stdout] 83 | fn channel<T>() ->(Sender<T>,Receiver<T>){
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs`
[INFO] [stdout]  --> src/main.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fs;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::error::Error`
[INFO] [stdout]  --> src/main.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::error::Error;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tx`
[INFO] [stdout]   --> src/main.rs:50:10
[INFO] [stdout]    |
[INFO] [stdout] 50 |     let (tx, mut rx) = oneshot::channel::<()>();
[INFO] [stdout]    |          ^^ help: if this is intentional, prefix it with an underscore: `_tx`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `content` and `id` are never read
[INFO] [stdout]   --> src/main.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub struct Message{
[INFO] [stdout]    |            ------- fields in this struct
[INFO] [stdout] 24 |     content:String,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 25 |     id:i32
[INFO] [stdout]    |     ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Message` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 17.63s
[INFO] running `Command { std: "docker" "inspect" "fa18af7b666cd3ee1af4cc1ff0f528897ae44f3671d084adae9aba96a1063314", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fa18af7b666cd3ee1af4cc1ff0f528897ae44f3671d084adae9aba96a1063314", kill_on_drop: false }`
[INFO] [stdout] fa18af7b666cd3ee1af4cc1ff0f528897ae44f3671d084adae9aba96a1063314
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-03-05" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cdb397c1a522095f6a470d3da904c3fd8a88aa5df65f84a1751daa4741e64218
[INFO] running `Command { std: "docker" "start" "-a" "cdb397c1a522095f6a470d3da904c3fd8a88aa5df65f84a1751daa4741e64218", kill_on_drop: false }`
[INFO] [stdout] warning: type `foo` should have an upper camel case name
[INFO] [stdout]   --> src/func.rs:37:8
[INFO] [stdout]    |
[INFO] [stdout] 37 | struct foo{
[INFO] [stdout]    |        ^^^ help: convert the identifier to upper camel case (notice the capitalization): `Foo`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_camel_case_types)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]  --> src/func.rs:8:15
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn closure<F>(f:F)
[INFO] [stdout]   |               ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/pin.rs:14:13
[INFO] [stdout]    |
[INFO] [stdout] 14 |         let x = self.f.as_mut();
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `until_char` is never used
[INFO] [stdout]   --> src/strsplit.rs:55:4
[INFO] [stdout]    |
[INFO] [stdout] 55 | fn until_char(str:&str,c:char) -> &'_ str{
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Exml` is never constructed
[INFO] [stdout]   --> src/dispatch.rs:49:8
[INFO] [stdout]    |
[INFO] [stdout] 49 | struct Exml{
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `bar` is never used
[INFO] [stdout]  --> src/func.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn bar<T> (){}
[INFO] [stdout]   |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `call_fn` is never used
[INFO] [stdout]  --> src/func.rs:4:4
[INFO] [stdout]   |
[INFO] [stdout] 4 | fn call_fn(f:fn()){
[INFO] [stdout]   |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `closure` is never used
[INFO] [stdout]  --> src/func.rs:8:4
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn closure<F>(f:F)
[INFO] [stdout]   |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `take_by_ref` is never used
[INFO] [stdout]   --> src/func.rs:32:4
[INFO] [stdout]    |
[INFO] [stdout] 32 | fn take_by_ref(i:&i32){
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `foo` is never constructed
[INFO] [stdout]   --> src/func.rs:37:8
[INFO] [stdout]    |
[INFO] [stdout] 37 | struct foo{
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `take_struct_by_ref` is never used
[INFO] [stdout]   --> src/func.rs:42:4
[INFO] [stdout]    |
[INFO] [stdout] 42 | fn take_struct_by_ref(f:&foo){
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `RefHolder` is never constructed
[INFO] [stdout]   --> src/func.rs:47:8
[INFO] [stdout]    |
[INFO] [stdout] 47 | struct RefHolder<'a> {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/func.rs:52:8
[INFO] [stdout]    |
[INFO] [stdout] 51 | impl<'a> RefHolder<'a> {
[INFO] [stdout]    | ---------------------- associated function in this implementation
[INFO] [stdout] 52 |     fn new(x: &'a i64) -> RefHolder<'a> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Ready` is never constructed
[INFO] [stdout]  --> src/pin.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Ready<T>{
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MyFuture` is never constructed
[INFO] [stdout]  --> src/pin.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | struct MyFuture<F>{
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_t` is never used
[INFO] [stdout]   --> src/pin.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl<F> MyFuture<F>{
[INFO] [stdout]    | ------------------- method in this implementation
[INFO] [stdout] 13 |     fn get_t(&mut self){
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `LOCKED` is never used
[INFO] [stdout]  --> src/atomics.rs:3:7
[INFO] [stdout]   |
[INFO] [stdout] 3 | const LOCKED:bool = true;
[INFO] [stdout]   |       ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `locked` and `v` are never read
[INFO] [stdout]  --> src/atomics.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub struct Mutex<T>{
[INFO] [stdout]   |            ----- fields in this struct
[INFO] [stdout] 8 |     locked: AtomicBool,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 9 |     v:UnsafeCell<T>
[INFO] [stdout]   |     ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `with_lock` is never used
[INFO] [stdout]   --> src/atomics.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl<T> Mutex<T>{
[INFO] [stdout]    | ---------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 21 |     fn with_lock<R>(&self,f:impl FnOnce(&mut T) -> R) ->R{
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `channel` is never used
[INFO] [stdout]   --> src/channel.rs:83:4
[INFO] [stdout]    |
[INFO] [stdout] 83 | fn channel<T>() ->(Sender<T>,Receiver<T>){
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling rust-practice v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: type `foo` should have an upper camel case name
[INFO] [stdout]   --> src/func.rs:37:8
[INFO] [stdout]    |
[INFO] [stdout] 37 | struct foo{
[INFO] [stdout]    |        ^^^ help: convert the identifier to upper camel case (notice the capitalization): `Foo`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_camel_case_types)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]  --> src/func.rs:8:15
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn closure<F>(f:F)
[INFO] [stdout]   |               ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/pin.rs:14:13
[INFO] [stdout]    |
[INFO] [stdout] 14 |         let x = self.f.as_mut();
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs`
[INFO] [stdout]  --> src/main.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fs;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::error::Error`
[INFO] [stdout]  --> src/main.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::error::Error;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> src/strtok.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let hello = strtok(&mut s, ' ');
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Exml` is never constructed
[INFO] [stdout]   --> src/dispatch.rs:49:8
[INFO] [stdout]    |
[INFO] [stdout] 49 | struct Exml{
[INFO] [stdout]    |        ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `take_by_ref` is never used
[INFO] [stdout]   --> src/func.rs:32:4
[INFO] [stdout]    |
[INFO] [stdout] 32 | fn take_by_ref(i:&i32){
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `foo` is never constructed
[INFO] [stdout]   --> src/func.rs:37:8
[INFO] [stdout]    |
[INFO] [stdout] 37 | struct foo{
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `take_struct_by_ref` is never used
[INFO] [stdout]   --> src/func.rs:42:4
[INFO] [stdout]    |
[INFO] [stdout] 42 | fn take_struct_by_ref(f:&foo){
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `x` is never read
[INFO] [stdout]   --> src/func.rs:48:5
[INFO] [stdout]    |
[INFO] [stdout] 47 | struct RefHolder<'a> {
[INFO] [stdout]    |        --------- field in this struct
[INFO] [stdout] 48 |     x: &'a i64,
[INFO] [stdout]    |     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `RefHolder` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Ready` is never constructed
[INFO] [stdout]  --> src/pin.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Ready<T>{
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MyFuture` is never constructed
[INFO] [stdout]  --> src/pin.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | struct MyFuture<F>{
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_t` is never used
[INFO] [stdout]   --> src/pin.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl<F> MyFuture<F>{
[INFO] [stdout]    | ------------------- method in this implementation
[INFO] [stdout] 13 |     fn get_t(&mut self){
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `LOCKED` is never used
[INFO] [stdout]  --> src/atomics.rs:3:7
[INFO] [stdout]   |
[INFO] [stdout] 3 | const LOCKED:bool = true;
[INFO] [stdout]   |       ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `locked` and `v` are never read
[INFO] [stdout]  --> src/atomics.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub struct Mutex<T>{
[INFO] [stdout]   |            ----- fields in this struct
[INFO] [stdout] 8 |     locked: AtomicBool,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 9 |     v:UnsafeCell<T>
[INFO] [stdout]   |     ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `with_lock` is never used
[INFO] [stdout]   --> src/atomics.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl<T> Mutex<T>{
[INFO] [stdout]    | ---------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 21 |     fn with_lock<R>(&self,f:impl FnOnce(&mut T) -> R) ->R{
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tx`
[INFO] [stdout]   --> src/main.rs:50:10
[INFO] [stdout]    |
[INFO] [stdout] 50 |     let (tx, mut rx) = oneshot::channel::<()>();
[INFO] [stdout]    |          ^^ help: if this is intentional, prefix it with an underscore: `_tx`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `content` and `id` are never read
[INFO] [stdout]   --> src/main.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub struct Message{
[INFO] [stdout]    |            ------- fields in this struct
[INFO] [stdout] 24 |     content:String,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 25 |     id:i32
[INFO] [stdout]    |     ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Message` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.74s
[INFO] running `Command { std: "docker" "inspect" "cdb397c1a522095f6a470d3da904c3fd8a88aa5df65f84a1751daa4741e64218", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cdb397c1a522095f6a470d3da904c3fd8a88aa5df65f84a1751daa4741e64218", kill_on_drop: false }`
[INFO] [stdout] cdb397c1a522095f6a470d3da904c3fd8a88aa5df65f84a1751daa4741e64218
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-03-05" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 7e3758ab4a06c0a402557d00a58abf1f3969ef3804b9146ba7e8c79823673dcf
[INFO] running `Command { std: "docker" "start" "-a" "7e3758ab4a06c0a402557d00a58abf1f3969ef3804b9146ba7e8c79823673dcf", kill_on_drop: false }`
[INFO] [stderr] warning: type `foo` should have an upper camel case name
[INFO] [stderr]   --> src/func.rs:37:8
[INFO] [stderr]    |
[INFO] [stderr] 37 | struct foo{
[INFO] [stderr]    |        ^^^ help: convert the identifier to upper camel case (notice the capitalization): `Foo`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_camel_case_types)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `f`
[INFO] [stderr]  --> src/func.rs:8:15
[INFO] [stderr]   |
[INFO] [stderr] 8 | fn closure<F>(f:F)
[INFO] [stderr]   |               ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/pin.rs:14:13
[INFO] [stderr]    |
[INFO] [stderr] 14 |         let x = self.f.as_mut();
[INFO] [stderr]    |             ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stderr] 
[INFO] [stderr] warning: function `until_char` is never used
[INFO] [stderr]   --> src/strsplit.rs:55:4
[INFO] [stderr]    |
[INFO] [stderr] 55 | fn until_char(str:&str,c:char) -> &'_ str{
[INFO] [stderr]    |    ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Exml` is never constructed
[INFO] [stderr]   --> src/dispatch.rs:49:8
[INFO] [stderr]    |
[INFO] [stderr] 49 | struct Exml{
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `bar` is never used
[INFO] [stderr]  --> src/func.rs:1:4
[INFO] [stderr]   |
[INFO] [stderr] 1 | fn bar<T> (){}
[INFO] [stderr]   |    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `call_fn` is never used
[INFO] [stderr]  --> src/func.rs:4:4
[INFO] [stderr]   |
[INFO] [stderr] 4 | fn call_fn(f:fn()){
[INFO] [stderr]   |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `closure` is never used
[INFO] [stderr]  --> src/func.rs:8:4
[INFO] [stderr]   |
[INFO] [stderr] 8 | fn closure<F>(f:F)
[INFO] [stderr]   |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `take_by_ref` is never used
[INFO] [stderr]   --> src/func.rs:32:4
[INFO] [stderr]    |
[INFO] [stderr] 32 | fn take_by_ref(i:&i32){
[INFO] [stderr]    |    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `foo` is never constructed
[INFO] [stderr]   --> src/func.rs:37:8
[INFO] [stderr]    |
[INFO] [stderr] 37 | struct foo{
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `take_struct_by_ref` is never used
[INFO] [stderr]   --> src/func.rs:42:4
[INFO] [stderr]    |
[INFO] [stderr] 42 | fn take_struct_by_ref(f:&foo){
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `RefHolder` is never constructed
[INFO] [stderr]   --> src/func.rs:47:8
[INFO] [stderr]    |
[INFO] [stderr] 47 | struct RefHolder<'a> {
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `new` is never used
[INFO] [stderr]   --> src/func.rs:52:8
[INFO] [stderr]    |
[INFO] [stderr] 51 | impl<'a> RefHolder<'a> {
[INFO] [stderr]    | ---------------------- associated function in this implementation
[INFO] [stderr] 52 |     fn new(x: &'a i64) -> RefHolder<'a> {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Ready` is never constructed
[INFO] [stderr]  --> src/pin.rs:3:8
[INFO] [stderr]   |
[INFO] [stderr] 3 | struct Ready<T>{
[INFO] [stderr]   |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `MyFuture` is never constructed
[INFO] [stderr]  --> src/pin.rs:8:8
[INFO] [stderr]   |
[INFO] [stderr] 8 | struct MyFuture<F>{
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `get_t` is never used
[INFO] [stderr]   --> src/pin.rs:13:8
[INFO] [stderr]    |
[INFO] [stderr] 12 | impl<F> MyFuture<F>{
[INFO] [stderr]    | ------------------- method in this implementation
[INFO] [stderr] 13 |     fn get_t(&mut self){
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant `LOCKED` is never used
[INFO] [stderr]  --> src/atomics.rs:3:7
[INFO] [stderr]   |
[INFO] [stderr] 3 | const LOCKED:bool = true;
[INFO] [stderr]   |       ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: fields `locked` and `v` are never read
[INFO] [stderr]  --> src/atomics.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub struct Mutex<T>{
[INFO] [stderr]   |            ----- fields in this struct
[INFO] [stderr] 8 |     locked: AtomicBool,
[INFO] [stderr]   |     ^^^^^^
[INFO] [stderr] 9 |     v:UnsafeCell<T>
[INFO] [stderr]   |     ^
[INFO] [stderr] 
[INFO] [stderr] warning: method `with_lock` is never used
[INFO] [stderr]   --> src/atomics.rs:21:8
[INFO] [stderr]    |
[INFO] [stderr] 12 | impl<T> Mutex<T>{
[INFO] [stderr]    | ---------------- method in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 21 |     fn with_lock<R>(&self,f:impl FnOnce(&mut T) -> R) ->R{
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `channel` is never used
[INFO] [stderr]   --> src/channel.rs:83:4
[INFO] [stderr]    |
[INFO] [stderr] 83 | fn channel<T>() ->(Sender<T>,Receiver<T>){
[INFO] [stderr]    |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `hello`
[INFO] [stderr]   --> src/strtok.rs:19:9
[INFO] [stderr]    |
[INFO] [stderr] 19 |     let hello = strtok(&mut s, ' ');
[INFO] [stderr]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Exml` is never constructed
[INFO] [stderr]   --> src/dispatch.rs:49:8
[INFO] [stderr]    |
[INFO] [stderr] 49 | struct Exml{
[INFO] [stderr]    |        ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field `x` is never read
[INFO] [stderr]   --> src/func.rs:48:5
[INFO] [stderr]    |
[INFO] [stderr] 47 | struct RefHolder<'a> {
[INFO] [stderr]    |        --------- field in this struct
[INFO] [stderr] 48 |     x: &'a i64,
[INFO] [stderr]    |     ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `RefHolder` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: `rust-practice` (lib) generated 20 warnings (run `cargo fix --lib -p rust-practice` to apply 2 suggestions)
[INFO] [stderr] warning: `rust-practice` (lib test) generated 15 warnings (12 duplicates) (run `cargo fix --lib -p rust-practice --tests` to apply 1 suggestion)
[INFO] [stderr] warning: unused import: `std::fs`
[INFO] [stderr]  --> src/main.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::fs;
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::error::Error`
[INFO] [stderr]  --> src/main.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::error::Error;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `tx`
[INFO] [stderr]   --> src/main.rs:50:10
[INFO] [stderr]    |
[INFO] [stderr] 50 |     let (tx, mut rx) = oneshot::channel::<()>();
[INFO] [stderr]    |          ^^ help: if this is intentional, prefix it with an underscore: `_tx`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: fields `content` and `id` are never read
[INFO] [stderr]   --> src/main.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 23 | pub struct Message{
[INFO] [stderr]    |            ------- fields in this struct
[INFO] [stderr] 24 |     content:String,
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr] 25 |     id:i32
[INFO] [stderr]    |     ^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `Message` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `rust-practice` (bin "rust-practice" test) generated 4 warnings (run `cargo fix --bin "rust-practice" -p rust-practice --tests` to apply 3 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.10s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/rust_practice-2bd68088847d9a23)
[INFO] [stdout] 
[INFO] [stdout] running 10 tests
[INFO] [stdout] test dispatch::trait_work ... ok
[INFO] [stdout] test flat::two_wide ... ok
[INFO] [stdout] test func::it_works ... ok
[INFO] [stdout] test func::test_mut_by_read_ref ... ok
[INFO] [stdout] test strsplit::until_char_test ... ok
[INFO] [stdout] test strtok::it_works ... ok
[INFO] [stdout] test dispatch::it_work ... ok
[INFO] [stdout] test flat::one ... ok
[INFO] [stdout] test strsplit::it_work ... ok
[INFO] [stdout] test channel::ping_pong has been running for over 60 seconds
[ERROR] error running command: no output for 300 seconds
[INFO] running `Command { std: "docker" "inspect" "7e3758ab4a06c0a402557d00a58abf1f3969ef3804b9146ba7e8c79823673dcf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7e3758ab4a06c0a402557d00a58abf1f3969ef3804b9146ba7e8c79823673dcf", kill_on_drop: false }`
[INFO] [stdout] 7e3758ab4a06c0a402557d00a58abf1f3969ef3804b9146ba7e8c79823673dcf
