[INFO] cloning repository https://github.com/oscarbrehier/learning-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/oscarbrehier/learning-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Foscarbrehier%2Flearning-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Foscarbrehier%2Flearning-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7e591dfb22e41798a2b52e0dd73b6870d6512d2a
[INFO] checking oscarbrehier/learning-rust against try#0611f7de057c584b8771102fde7aed6c70c71d3b for pr-146440
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Foscarbrehier%2Flearning-rust" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/oscarbrehier/learning-rust
[INFO] finished tweaking git repo https://github.com/oscarbrehier/learning-rust
[INFO] tweaked toml for git repo https://github.com/oscarbrehier/learning-rust written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/oscarbrehier/learning-rust on toolchain 0611f7de057c584b8771102fde7aed6c70c71d3b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/oscarbrehier/learning-rust 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" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c57aa428b87993823faf03dc49020e5ed3a7dffc1095b7e97544f4aa304ccd08
[INFO] running `Command { std: "docker" "start" "-a" "c57aa428b87993823faf03dc49020e5ed3a7dffc1095b7e97544f4aa304ccd08", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c57aa428b87993823faf03dc49020e5ed3a7dffc1095b7e97544f4aa304ccd08", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c57aa428b87993823faf03dc49020e5ed3a7dffc1095b7e97544f4aa304ccd08", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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=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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "start" "-a" "a6c9f241b01c8b6bed90ac0da11da43b29bdddc3cff8ceca5a1a0da611f126aa", kill_on_drop: false }`
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[INFO] [stderr]     Checking bounded v0.1.0 (/opt/rustwide/workdir/exercises/07_threads/09_bounded)
[INFO] [stdout] warning: unused import: `core::error`
[INFO] [stdout]  --> exercises/07_threads/09_bounded/src/lib.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use core::error;
[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 imports: `Sender` and `TrySendError`
[INFO] [stdout]  --> exercises/07_threads/09_bounded/src/lib.rs:5:33
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::sync::mpsc::{Receiver, Sender, SyncSender, TrySendError};
[INFO] [stdout]   |                                 ^^^^^^              ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking itertools v0.13.0
[INFO] [stdout] warning: type `Command` is more private than the item `server`
[INFO] [stdout]   --> exercises/07_threads/09_bounded/src/lib.rs:57:1
[INFO] [stdout]    |
[INFO] [stdout] 57 | pub fn server(receiver: Receiver<Command>) {
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ function `server` is reachable at visibility `pub`
[INFO] [stdout]    |
[INFO] [stdout] note: but type `Command` is only usable at visibility `pub(crate)`
[INFO] [stdout]   --> exercises/07_threads/09_bounded/src/lib.rs:46:1
[INFO] [stdout]    |
[INFO] [stdout] 46 | enum Command {
[INFO] [stdout]    | ^^^^^^^^^^^^
[INFO] [stdout]    = note: `#[warn(private_interfaces)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking patch v0.1.0 (/opt/rustwide/workdir/exercises/07_threads/10_patch)
[INFO] [stderr]     Checking without_channels v0.1.0 (/opt/rustwide/workdir/exercises/07_threads/13_without_channels)
[INFO] [stderr]     Checking axum v0.8.8
[INFO] [stdout] warning: type `Command` is more private than the item `server`
[INFO] [stdout]   --> exercises/07_threads/10_patch/src/lib.rs:72:1
[INFO] [stdout]    |
[INFO] [stdout] 72 | pub fn server(receiver: Receiver<Command>) {
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ function `server` is reachable at visibility `pub`
[INFO] [stdout]    |
[INFO] [stdout] note: but type `Command` is only usable at visibility `pub(crate)`
[INFO] [stdout]   --> exercises/07_threads/10_patch/src/lib.rs:57:1
[INFO] [stdout]    |
[INFO] [stdout] 57 | enum Command {
[INFO] [stdout]    | ^^^^^^^^^^^^
[INFO] [stdout]    = note: `#[warn(private_interfaces)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking client v0.1.0 (/opt/rustwide/workdir/exercises/07_threads/08_client)
[INFO] [stderr]     Checking rwlock v0.1.0 (/opt/rustwide/workdir/exercises/07_threads/12_rw_lock)
[INFO] [stdout] warning: unused import: `TrySendError`
[INFO] [stdout]  --> exercises/07_threads/12_rw_lock/src/lib.rs:3:59
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::sync::mpsc::{sync_channel, Receiver, SyncSender, TrySendError};
[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: `Mutex`
[INFO] [stdout]  --> exercises/07_threads/12_rw_lock/src/lib.rs:4:22
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::sync::{Arc, Mutex, RwLock};
[INFO] [stdout]   |                      ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Mutex`
[INFO] [stdout]  --> exercises/07_threads/12_rw_lock/src/store.rs:3:22
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::sync::{Arc, Mutex, RwLock};
[INFO] [stdout]   |                      ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking channels v0.1.0 (/opt/rustwide/workdir/exercises/07_threads/05_channels)
[INFO] [stdout] warning: type `Command` is more private than the item `server`
[INFO] [stdout]   --> exercises/07_threads/12_rw_lock/src/lib.rs:62:1
[INFO] [stdout]    |
[INFO] [stdout] 62 | pub fn server(receiver: Receiver<Command>) {
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ function `server` is reachable at visibility `pub`
[INFO] [stdout]    |
[INFO] [stdout] note: but type `Command` is only usable at visibility `pub(crate)`
[INFO] [stdout]   --> exercises/07_threads/12_rw_lock/src/lib.rs:51:1
[INFO] [stdout]    |
[INFO] [stdout] 51 | enum Command {
[INFO] [stdout]    | ^^^^^^^^^^^^
[INFO] [stdout]    = note: `#[warn(private_interfaces)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking response v0.1.0 (/opt/rustwide/workdir/exercises/07_threads/07_ack)
[INFO] [stderr]     Checking locks v0.1.0 (/opt/rustwide/workdir/exercises/07_threads/11_locks)
[INFO] [stdout] warning: unused imports: `cell::RefCell` and `rc::Rc`
[INFO] [stdout]  --> exercises/07_threads/07_ack/src/lib.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{cell::RefCell, rc::Rc, sync::mpsc::{Receiver, Sender}};
[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: `TrySendError`
[INFO] [stdout]  --> exercises/07_threads/11_locks/src/lib.rs:4:59
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::sync::mpsc::{sync_channel, Receiver, SyncSender, TrySendError};
[INFO] [stdout]   |                                                           ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking static_assertions v1.1.0
[INFO] [stderr]     Checking outro_02 v0.1.0 (/opt/rustwide/workdir/exercises/03_ticket_v1/12_outro)
[INFO] [stderr]     Checking ammonia v4.1.2
[INFO] [stderr]     Checking outro_03 v0.1.0 (/opt/rustwide/workdir/exercises/04_traits/14_outro)
[INFO] [stdout] warning: type `Command` is more private than the item `server`
[INFO] [stdout]   --> exercises/07_threads/11_locks/src/lib.rs:63:1
[INFO] [stdout]    |
[INFO] [stdout] 63 | pub fn server(receiver: Receiver<Command>) {
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ function `server` is reachable at visibility `pub`
[INFO] [stdout]    |
[INFO] [stdout] note: but type `Command` is only usable at visibility `pub(crate)`
[INFO] [stdout]   --> exercises/07_threads/11_locks/src/lib.rs:52:1
[INFO] [stdout]    |
[INFO] [stdout] 52 | enum Command {
[INFO] [stdout]    | ^^^^^^^^^^^^
[INFO] [stdout]    = note: `#[warn(private_interfaces)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking error_trait v0.1.0 (/opt/rustwide/workdir/exercises/05_ticket_v2/09_error_trait)
[INFO] [stdout] warning: unused imports: `Formatter` and `clone`
[INFO] [stdout]  --> exercises/05_ticket_v2/09_error_trait/src/lib.rs:6:11
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::{clone, fmt::{Error, Formatter}};
[INFO] [stdout]   |           ^^^^^               ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `InProgress` and `Done` are never constructed
[INFO] [stdout]   --> exercises/05_ticket_v2/09_error_trait/src/lib.rs:51:5
[INFO] [stdout]    |
[INFO] [stdout] 49 | enum Status {
[INFO] [stdout]    |      ------ variants in this enum
[INFO] [stdout] 50 |     ToDo,
[INFO] [stdout] 51 |     InProgress { assigned_to: String },
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 52 |     Done,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Status` has derived impls for the traits `Clone` and `Debug`, but these are 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]     Checking cancellation v0.1.0 (/opt/rustwide/workdir/exercises/08_futures/07_cancellation)
[INFO] [stderr]     Checking future v0.1.0 (/opt/rustwide/workdir/exercises/08_futures/04_future)
[INFO] [stderr]     Checking spawn v0.1.0 (/opt/rustwide/workdir/exercises/08_futures/02_spawn)
[INFO] [stderr]     Checking async_fn v0.1.0 (/opt/rustwide/workdir/exercises/08_futures/01_async_fn)
[INFO] [stdout] warning: function `spawner` is never used
[INFO] [stdout]  --> exercises/08_futures/04_future/src/lib.rs:8:4
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn spawner() {
[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 `example` is never used
[INFO] [stdout]   --> exercises/08_futures/04_future/src/lib.rs:12:10
[INFO] [stdout]    |
[INFO] [stdout] 12 | async fn example() {
[INFO] [stdout]    |          ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking async_locks v0.1.0 (/opt/rustwide/workdir/exercises/08_futures/06_async_aware_primitives)
[INFO] [stdout] warning: unused import: `anyhow::Ok`
[INFO] [stdout]  --> exercises/08_futures/01_async_fn/src/lib.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use anyhow::Ok;
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `spawner` is never used
[INFO] [stdout]  --> exercises/08_futures/04_future/src/lib.rs:8:4
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn spawner() {
[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 `example` is never used
[INFO] [stdout]   --> exercises/08_futures/04_future/src/lib.rs:12:10
[INFO] [stdout]    |
[INFO] [stdout] 12 | async fn example() {
[INFO] [stdout]    |          ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking blocking v0.1.0 (/opt/rustwide/workdir/exercises/08_futures/05_blocking)
[INFO] [stdout] warning: unused import: `anyhow::Ok`
[INFO] [stdout]  --> exercises/08_futures/01_async_fn/src/lib.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use anyhow::Ok;
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking runtime v0.1.0 (/opt/rustwide/workdir/exercises/08_futures/03_runtime)
[INFO] [stdout] warning: unused `Result` in tuple element 0 that must be used
[INFO] [stdout]   --> exercises/08_futures/03_runtime/src/lib.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     tokio::join!(t1, t2);
[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)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` in tuple element 1 that must be used
[INFO] [stdout]   --> exercises/08_futures/03_runtime/src/lib.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     tokio::join!(t1, t2);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` in tuple element 0 that must be used
[INFO] [stdout]   --> exercises/08_futures/03_runtime/src/lib.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     tokio::join!(t1, t2);
[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)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` in tuple element 1 that must be used
[INFO] [stdout]   --> exercises/08_futures/03_runtime/src/lib.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     tokio::join!(t1, t2);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking outro_04 v0.1.0 (/opt/rustwide/workdir/exercises/05_ticket_v2/15_outro)
[INFO] [stderr]     Checking tryfrom v0.1.0 (/opt/rustwide/workdir/exercises/05_ticket_v2/13_try_from)
[INFO] [stdout] warning: unused import: `crate::description`
[INFO] [stdout]  --> exercises/05_ticket_v2/15_outro/src/description.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use crate::description;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Status` is never used
[INFO] [stdout]  --> exercises/05_ticket_v2/13_try_from/src/lib.rs:5:6
[INFO] [stdout]   |
[INFO] [stdout] 5 | enum Status {
[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 `ParseStatusError` is never constructed
[INFO] [stdout]   --> exercises/05_ticket_v2/13_try_from/src/lib.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | struct ParseStatusError {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking thiserror_ v0.1.0 (/opt/rustwide/workdir/exercises/05_ticket_v2/12_thiserror)
[INFO] [stdout] warning: unused import: `core::error`
[INFO] [stdout]  --> exercises/07_threads/09_bounded/src/lib.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use core::error;
[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 imports: `Sender` and `TrySendError`
[INFO] [stdout]  --> exercises/07_threads/09_bounded/src/lib.rs:5:33
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::sync::mpsc::{Receiver, Sender, SyncSender, TrySendError};
[INFO] [stdout]   |                                 ^^^^^^              ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::description`
[INFO] [stdout]  --> exercises/05_ticket_v2/15_outro/src/description.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use crate::description;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `InProgress` and `Done` are never constructed
[INFO] [stdout]   --> exercises/05_ticket_v2/12_thiserror/src/lib.rs:28:5
[INFO] [stdout]    |
[INFO] [stdout] 26 | enum Status {
[INFO] [stdout]    |      ------ variants in this enum
[INFO] [stdout] 27 |     ToDo,
[INFO] [stdout] 28 |     InProgress { assigned_to: String },
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 29 |     Done,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Status` has derived impls for the traits `Clone` and `Debug`, but these are 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]     Checking pulldown-cmark-to-cmark v15.0.1
[INFO] [stderr]     Checking index_mut v0.1.0 (/opt/rustwide/workdir/exercises/06_ticket_management/14_index_mut)
[INFO] [stdout] warning: type `Command` is more private than the item `server`
[INFO] [stdout]   --> exercises/07_threads/09_bounded/src/lib.rs:57:1
[INFO] [stdout]    |
[INFO] [stdout] 57 | pub fn server(receiver: Receiver<Command>) {
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ function `server` is reachable at visibility `pub`
[INFO] [stdout]    |
[INFO] [stdout] note: but type `Command` is only usable at visibility `pub(crate)`
[INFO] [stdout]   --> exercises/07_threads/09_bounded/src/lib.rs:46:1
[INFO] [stdout]    |
[INFO] [stdout] 46 | enum Command {
[INFO] [stdout]    | ^^^^^^^^^^^^
[INFO] [stdout]    = note: `#[warn(private_interfaces)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking iter v0.1.0 (/opt/rustwide/workdir/exercises/06_ticket_management/05_iter)
[INFO] [stdout] warning: enum `TicketNewError` is never used
[INFO] [stdout]  --> exercises/05_ticket_v2/12_thiserror/src/lib.rs:7:6
[INFO] [stdout]   |
[INFO] [stdout] 7 | enum TicketNewError {
[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 `Ticket` is never constructed
[INFO] [stdout]   --> exercises/05_ticket_v2/12_thiserror/src/lib.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | struct Ticket {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Status` is never used
[INFO] [stdout]   --> exercises/05_ticket_v2/12_thiserror/src/lib.rs:26:6
[INFO] [stdout]    |
[INFO] [stdout] 26 | enum Status {
[INFO] [stdout]    |      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> exercises/05_ticket_v2/12_thiserror/src/lib.rs:33:12
[INFO] [stdout]    |
[INFO] [stdout] 32 | impl Ticket {
[INFO] [stdout]    | ----------- associated function in this implementation
[INFO] [stdout] 33 |     pub fn new(
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking lifetime v0.1.0 (/opt/rustwide/workdir/exercises/06_ticket_management/06_lifetimes)
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> exercises/06_ticket_management/05_iter/src/lib.rs:38:17
[INFO] [stdout]    |
[INFO] [stdout] 38 |     pub fn iter(&self) -> std::slice::Iter<Ticket> {
[INFO] [stdout]    |                 ^^^^^     ^^^^^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 38 |     pub fn iter(&self) -> std::slice::Iter<'_, Ticket> {
[INFO] [stdout]    |                                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> exercises/06_ticket_management/06_lifetimes/src/lib.rs:43:17
[INFO] [stdout]    |
[INFO] [stdout] 43 |     pub fn iter(&self) -> std::slice::Iter<Ticket> {
[INFO] [stdout]    |                 ^^^^^     ^^^^^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 43 |     pub fn iter(&self) -> std::slice::Iter<'_, Ticket> {
[INFO] [stdout]    |                                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `TrySendError`
[INFO] [stdout]  --> exercises/07_threads/11_locks/src/lib.rs:4:59
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::sync::mpsc::{sync_channel, Receiver, SyncSender, TrySendError};
[INFO] [stdout]   |                                                           ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking iterators v0.1.0 (/opt/rustwide/workdir/exercises/06_ticket_management/04_iterators)
[INFO] [stderr]     Checking btreemap v0.1.0 (/opt/rustwide/workdir/exercises/06_ticket_management/16_btreemap)
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> exercises/06_ticket_management/05_iter/src/lib.rs:38:17
[INFO] [stdout]    |
[INFO] [stdout] 38 |     pub fn iter(&self) -> std::slice::Iter<Ticket> {
[INFO] [stdout]    |                 ^^^^^     ^^^^^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 38 |     pub fn iter(&self) -> std::slice::Iter<'_, Ticket> {
[INFO] [stdout]    |                                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `Command` is more private than the item `server`
[INFO] [stdout]   --> exercises/07_threads/11_locks/src/lib.rs:63:1
[INFO] [stdout]    |
[INFO] [stdout] 63 | pub fn server(receiver: Receiver<Command>) {
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ function `server` is reachable at visibility `pub`
[INFO] [stdout]    |
[INFO] [stdout] note: but type `Command` is only usable at visibility `pub(crate)`
[INFO] [stdout]   --> exercises/07_threads/11_locks/src/lib.rs:52:1
[INFO] [stdout]    |
[INFO] [stdout] 52 | enum Command {
[INFO] [stdout]    | ^^^^^^^^^^^^
[INFO] [stdout]    = note: `#[warn(private_interfaces)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking combinators v0.1.0 (/opt/rustwide/workdir/exercises/06_ticket_management/07_combinators)
[INFO] [stderr]     Checking hashmap v0.1.0 (/opt/rustwide/workdir/exercises/06_ticket_management/15_hashmap)
[INFO] [stdout] warning: unused import: `TrySendError`
[INFO] [stdout]  --> exercises/07_threads/12_rw_lock/src/lib.rs:3:59
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::sync::mpsc::{sync_channel, Receiver, SyncSender, TrySendError};
[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: `Mutex`
[INFO] [stdout]  --> exercises/07_threads/12_rw_lock/src/lib.rs:4:22
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::sync::{Arc, Mutex, RwLock};
[INFO] [stdout]   |                      ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Mutex`
[INFO] [stdout]  --> exercises/07_threads/12_rw_lock/src/store.rs:3:22
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::sync::{Arc, Mutex, RwLock};
[INFO] [stdout]   |                      ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking two_states v0.1.0 (/opt/rustwide/workdir/exercises/06_ticket_management/12_two_states)
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> exercises/06_ticket_management/16_btreemap/src/lib.rs:118:13
[INFO] [stdout]     |
[INFO] [stdout] 118 |         for i in 0..n_tickets {
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `Command` is more private than the item `server`
[INFO] [stdout]   --> exercises/07_threads/12_rw_lock/src/lib.rs:62:1
[INFO] [stdout]    |
[INFO] [stdout] 62 | pub fn server(receiver: Receiver<Command>) {
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ function `server` is reachable at visibility `pub`
[INFO] [stdout]    |
[INFO] [stdout] note: but type `Command` is only usable at visibility `pub(crate)`
[INFO] [stdout]   --> exercises/07_threads/12_rw_lock/src/lib.rs:51:1
[INFO] [stdout]    |
[INFO] [stdout] 51 | enum Command {
[INFO] [stdout]    | ^^^^^^^^^^^^
[INFO] [stdout]    = note: `#[warn(private_interfaces)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking impl_trait_2 v0.1.0 (/opt/rustwide/workdir/exercises/06_ticket_management/09_impl_trait_2)
[INFO] [stderr]     Checking impl_trait v0.1.0 (/opt/rustwide/workdir/exercises/06_ticket_management/08_impl_trait)
[INFO] [stderr]     Checking index v0.1.0 (/opt/rustwide/workdir/exercises/06_ticket_management/13_index)
[INFO] [stdout] warning: unused import: `std::collections::binary_heap::Iter`
[INFO] [stdout]  --> exercises/06_ticket_management/08_impl_trait/src/lib.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::collections::binary_heap::Iter;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> exercises/06_ticket_management/06_lifetimes/src/lib.rs:43:17
[INFO] [stdout]    |
[INFO] [stdout] 43 |     pub fn iter(&self) -> std::slice::Iter<Ticket> {
[INFO] [stdout]    |                 ^^^^^     ^^^^^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 43 |     pub fn iter(&self) -> std::slice::Iter<'_, Ticket> {
[INFO] [stdout]    |                                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::binary_heap::Iter`
[INFO] [stdout]  --> exercises/06_ticket_management/08_impl_trait/src/lib.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::collections::binary_heap::Iter;
[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 variable: `ticket2`
[INFO] [stdout]    --> exercises/06_ticket_management/13_index/src/lib.rs:102:13
[INFO] [stdout]     |
[INFO] [stdout] 102 |         let ticket2 = &store[&id2];
[INFO] [stdout]     |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_ticket2`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking source v0.1.0 (/opt/rustwide/workdir/exercises/05_ticket_v2/14_source)
[INFO] [stdout] warning: unused variable: `ticket2`
[INFO] [stdout]   --> exercises/06_ticket_management/12_two_states/src/lib.rs:93:13
[INFO] [stdout]    |
[INFO] [stdout] 93 |         let ticket2 = store.get(id2).unwrap();
[INFO] [stdout]    |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_ticket2`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `Command` is more private than the item `server`
[INFO] [stdout]   --> exercises/07_threads/10_patch/src/lib.rs:72:1
[INFO] [stdout]    |
[INFO] [stdout] 72 | pub fn server(receiver: Receiver<Command>) {
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ function `server` is reachable at visibility `pub`
[INFO] [stdout]    |
[INFO] [stdout] note: but type `Command` is only usable at visibility `pub(crate)`
[INFO] [stdout]   --> exercises/07_threads/10_patch/src/lib.rs:57:1
[INFO] [stdout]    |
[INFO] [stdout] 57 | enum Command {
[INFO] [stdout]    | ^^^^^^^^^^^^
[INFO] [stdout]    = note: `#[warn(private_interfaces)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking deps v0.1.0 (/opt/rustwide/workdir/exercises/05_ticket_v2/11_dependencies)
[INFO] [stdout] warning: unused imports: `cell::RefCell` and `rc::Rc`
[INFO] [stdout]  --> exercises/07_threads/07_ack/src/lib.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{cell::RefCell, rc::Rc, sync::mpsc::{Receiver, Sender}};
[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: `anyhow::Error`
[INFO] [stdout]  --> exercises/05_ticket_v2/11_dependencies/src/lib.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use anyhow::Error;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking error_enums v0.1.0 (/opt/rustwide/workdir/exercises/05_ticket_v2/08_error_enums)
[INFO] [stderr]     Checking env_logger v0.11.8
[INFO] [stderr]     Checking validation v0.1.0 (/opt/rustwide/workdir/exercises/03_ticket_v1/02_validation)
[INFO] [stdout] warning: unused import: `anyhow::Error`
[INFO] [stdout]  --> exercises/05_ticket_v2/11_dependencies/src/lib.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use anyhow::Error;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking setters v0.1.0 (/opt/rustwide/workdir/exercises/03_ticket_v1/07_setters)
[INFO] [stderr]     Checking variants_with_data v0.1.0 (/opt/rustwide/workdir/exercises/05_ticket_v2/03_variants_with_data)
[INFO] [stderr]     Checking unwrap v0.1.0 (/opt/rustwide/workdir/exercises/05_ticket_v2/07_unwrap)
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> exercises/05_ticket_v2/08_error_enums/src/lib.rs:7:22
[INFO] [stdout]   |
[INFO] [stdout] 7 |     DescriptionError(String)
[INFO] [stdout]   |     ---------------- ^^^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `TicketNewError` 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] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 7 -     DescriptionError(String)
[INFO] [stdout] 7 +     DescriptionError(())
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `InProgress` and `Done` are never constructed
[INFO] [stdout]   --> exercises/05_ticket_v2/08_error_enums/src/lib.rs:34:5
[INFO] [stdout]    |
[INFO] [stdout] 32 | enum Status {
[INFO] [stdout]    |      ------ variants in this enum
[INFO] [stdout] 33 |     ToDo,
[INFO] [stdout] 34 |     InProgress { assigned_to: String },
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 35 |     Done,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Status` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking fallibility v0.1.0 (/opt/rustwide/workdir/exercises/05_ticket_v2/06_fallibility)
[INFO] [stderr]     Checking str_slice v0.1.0 (/opt/rustwide/workdir/exercises/04_traits/06_str_slice)
[INFO] [stderr]     Checking nullability v0.1.0 (/opt/rustwide/workdir/exercises/05_ticket_v2/05_nullability)
[INFO] [stderr]     Checking enum_ v0.1.0 (/opt/rustwide/workdir/exercises/05_ticket_v2/01_enum)
[INFO] [stderr]     Checking visibility v0.1.0 (/opt/rustwide/workdir/exercises/03_ticket_v1/04_visibility)
[INFO] [stdout] warning: associated items `new`, `title`, `description`, and `status` are never used
[INFO] [stdout]   --> exercises/05_ticket_v2/01_enum/src/lib.rs:22:12
[INFO] [stdout]    |
[INFO] [stdout] 21 | impl Ticket {
[INFO] [stdout]    | ----------- associated items in this implementation
[INFO] [stdout] 22 |     pub fn new(title: String, description: String, status: Status) -> Ticket {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 43 |     pub fn title(&self) -> &String {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 47 |     pub fn description(&self) -> &String {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 51 |     pub fn status(&self) -> &Status {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking ownership v0.1.0 (/opt/rustwide/workdir/exercises/03_ticket_v1/06_ownership)
[INFO] [stdout] warning: variants `InProgress` and `Done` are never constructed
[INFO] [stdout]   --> exercises/05_ticket_v2/07_unwrap/src/lib.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 25 | enum Status {
[INFO] [stdout]    |      ------ variants in this enum
[INFO] [stdout] 26 |     ToDo,
[INFO] [stdout] 27 |     InProgress { assigned_to: String },
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 28 |     Done,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Status` has derived impls for the traits `Clone` and `Debug`, but these are 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]     Checking encapsulation v0.1.0 (/opt/rustwide/workdir/exercises/03_ticket_v1/05_encapsulation)
[INFO] [stdout] warning: unused variable: `ticket`
[INFO] [stdout]   --> exercises/03_ticket_v1/04_visibility/src/lib.rs:71:13
[INFO] [stdout]    |
[INFO] [stdout] 71 |         let ticket = Ticket {
[INFO] [stdout]    |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_ticket`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Ticket` is never constructed
[INFO] [stdout]  --> exercises/03_ticket_v1/04_visibility/src/lib.rs:2:16
[INFO] [stdout]   |
[INFO] [stdout] 2 |     pub struct Ticket {
[INFO] [stdout]   |                ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]  --> exercises/03_ticket_v1/04_visibility/src/lib.rs:9:16
[INFO] [stdout]   |
[INFO] [stdout] 8 |     impl Ticket {
[INFO] [stdout]   |     ----------- associated function in this implementation
[INFO] [stdout] 9 |         pub fn new(title: String, description: String, status: String) -> Ticket {
[INFO] [stdout]   |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `should_not_be_possible` is never used
[INFO] [stdout]   --> exercises/03_ticket_v1/04_visibility/src/lib.rs:46:8
[INFO] [stdout]    |
[INFO] [stdout] 46 |     fn should_not_be_possible() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `encapsulation_cannot_be_violated` is never used
[INFO] [stdout]   --> exercises/03_ticket_v1/04_visibility/src/lib.rs:61:8
[INFO] [stdout]    |
[INFO] [stdout] 61 |     fn encapsulation_cannot_be_violated() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `InProgress` and `Done` are never constructed
[INFO] [stdout]   --> exercises/05_ticket_v2/06_fallibility/src/lib.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | enum Status {
[INFO] [stdout]    |      ------ variants in this enum
[INFO] [stdout] 13 |     ToDo,
[INFO] [stdout] 14 |     InProgress { assigned_to: String },
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 15 |     Done,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Status` 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]     Checking intro_02 v0.1.0 (/opt/rustwide/workdir/exercises/03_ticket_v1/00_intro)
[INFO] [stderr]     Checking intro_07 v0.1.0 (/opt/rustwide/workdir/exercises/07_threads/00_intro)
[INFO] [stderr]     Checking copy v0.1.0 (/opt/rustwide/workdir/exercises/04_traits/12_copy)
[INFO] [stderr]     Checking welcome_00 v0.1.0 (/opt/rustwide/workdir/exercises/01_intro/00_welcome)
[INFO] [stderr]     Checking assoc_vs_generic v0.1.0 (/opt/rustwide/workdir/exercises/04_traits/10_assoc_vs_generic)
[INFO] [stderr]     Checking orphan v0.1.0 (/opt/rustwide/workdir/exercises/04_traits/02_orphan_rule)
[INFO] [stderr]     Checking while_ v0.1.0 (/opt/rustwide/workdir/exercises/02_basic_calculator/06_while)
[INFO] [stderr]     Checking from v0.1.0 (/opt/rustwide/workdir/exercises/04_traits/09_from)
[INFO] [stdout] warning: unused import: `std::process::Output`
[INFO] [stdout]   --> exercises/04_traits/10_assoc_vs_generic/src/lib.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 | use std::process::Output;
[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 variable: `wrapping`
[INFO] [stdout]   --> exercises/04_traits/09_from/src/lib.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let wrapping: WrappingU32 = 42.into();
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_wrapping`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `wrapping`
[INFO] [stdout]   --> exercises/04_traits/09_from/src/lib.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let wrapping = WrappingU32::from(42);
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_wrapping`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `value` is never read
[INFO] [stdout]  --> exercises/04_traits/09_from/src/lib.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct WrappingU32 {
[INFO] [stdout]   |            ----------- field in this struct
[INFO] [stdout] 4 |     value: u32,
[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 `example` is never used
[INFO] [stdout]   --> exercises/04_traits/09_from/src/lib.rs:13:4
[INFO] [stdout]    |
[INFO] [stdout] 13 | fn example() {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking modules v0.1.0 (/opt/rustwide/workdir/exercises/03_ticket_v1/03_modules)
[INFO] [stderr]     Checking threads v0.1.0 (/opt/rustwide/workdir/exercises/07_threads/01_threads)
[INFO] [stderr]     Checking overloading v0.1.0 (/opt/rustwide/workdir/exercises/04_traits/03_operator_overloading)
[INFO] [stderr]     Checking derives v0.1.0 (/opt/rustwide/workdir/exercises/04_traits/04_derive)
[INFO] [stderr]     Checking match_ v0.1.0 (/opt/rustwide/workdir/exercises/05_ticket_v2/02_match)
[INFO] [stderr]     Checking panics v0.1.0 (/opt/rustwide/workdir/exercises/02_basic_calculator/04_panics)
[INFO] [stderr]     Checking intro_03 v0.1.0 (/opt/rustwide/workdir/exercises/04_traits/00_intro)
[INFO] [stderr]     Checking syntax v0.1.0 (/opt/rustwide/workdir/exercises/01_intro/01_syntax)
[INFO] [stdout] warning: function `easy_ticket` is never used
[INFO] [stdout]  --> exercises/05_ticket_v2/07_unwrap/src/lib.rs:4:4
[INFO] [stdout]   |
[INFO] [stdout] 4 | fn easy_ticket(title: String, description: String, status: Status) -> Ticket {
[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 `Ticket` is never constructed
[INFO] [stdout]   --> exercises/05_ticket_v2/07_unwrap/src/lib.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 18 | struct Ticket {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Status` is never used
[INFO] [stdout]   --> exercises/05_ticket_v2/07_unwrap/src/lib.rs:25:6
[INFO] [stdout]    |
[INFO] [stdout] 25 | enum Status {
[INFO] [stdout]    |      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> exercises/05_ticket_v2/07_unwrap/src/lib.rs:32:12
[INFO] [stdout]    |
[INFO] [stdout] 31 | impl Ticket {
[INFO] [stdout]    | ----------- associated function in this implementation
[INFO] [stdout] 32 |     pub fn new(title: String, description: String, status: Status) -> Result<Ticket, String> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Shape` is never used
[INFO] [stdout]  --> exercises/05_ticket_v2/02_match/src/lib.rs:1:6
[INFO] [stdout]   |
[INFO] [stdout] 1 | enum Shape {
[INFO] [stdout]   |      ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `n_sides` is never used
[INFO] [stdout]   --> exercises/05_ticket_v2/02_match/src/lib.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout]  9 | impl Shape {
[INFO] [stdout]    | ---------- method in this implementation
[INFO] [stdout] 10 |     // TODO: Implement the `n_sides` method using a `match`.
[INFO] [stdout] 11 |     pub fn n_sides(&self) -> u8 {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking slice v0.1.0 (/opt/rustwide/workdir/exercises/06_ticket_management/10_slices)
[INFO] [stdout] warning: struct `Ticket` is never constructed
[INFO] [stdout]   --> exercises/04_traits/04_derive/src/lib.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | struct Ticket {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking sync v0.1.0 (/opt/rustwide/workdir/exercises/07_threads/14_sync)
[INFO] [stderr]     Checking factorial v0.1.0 (/opt/rustwide/workdir/exercises/02_basic_calculator/05_factorial)
[INFO] [stderr]     Checking sized v0.1.0 (/opt/rustwide/workdir/exercises/04_traits/08_sized)
[INFO] [stderr]     Checking integers v0.1.0 (/opt/rustwide/workdir/exercises/02_basic_calculator/01_integers)
[INFO] [stderr]     Checking as_cast v0.1.0 (/opt/rustwide/workdir/exercises/02_basic_calculator/10_as_casting)
[INFO] [stderr]     Checking variables v0.1.0 (/opt/rustwide/workdir/exercises/02_basic_calculator/02_variables)
[INFO] [stdout] warning: unused variable: `wrapping`
[INFO] [stdout]   --> exercises/04_traits/09_from/src/lib.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let wrapping: WrappingU32 = 42.into();
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_wrapping`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `wrapping`
[INFO] [stdout]   --> exercises/04_traits/09_from/src/lib.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let wrapping = WrappingU32::from(42);
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_wrapping`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `value` is never read
[INFO] [stdout]  --> exercises/04_traits/09_from/src/lib.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct WrappingU32 {
[INFO] [stdout]   |            ----------- field in this struct
[INFO] [stdout] 4 |     value: u32,
[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 `example` is never used
[INFO] [stdout]   --> exercises/04_traits/09_from/src/lib.rs:13:4
[INFO] [stdout]    |
[INFO] [stdout] 13 | fn example() {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `sum` is never used
[INFO] [stdout]  --> exercises/06_ticket_management/10_slices/src/lib.rs:4:4
[INFO] [stdout]   |
[INFO] [stdout] 4 | fn sum(slice: &[u32]) -> u32 {
[INFO] [stdout]   |    ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking vec v0.1.0 (/opt/rustwide/workdir/exercises/06_ticket_management/02_vec)
[INFO] [stderr]     Checking overflow v0.1.0 (/opt/rustwide/workdir/exercises/02_basic_calculator/08_overflow)
[INFO] [stderr]     Checking intro_05 v0.1.0 (/opt/rustwide/workdir/exercises/06_ticket_management/00_intro)
[INFO] [stderr]     Checking deref v0.1.0 (/opt/rustwide/workdir/exercises/04_traits/07_deref)
[INFO] [stderr]     Checking trait_ v0.1.0 (/opt/rustwide/workdir/exercises/04_traits/01_trait)
[INFO] [stdout] error: struct `Ticket` is never constructed
[INFO] [stdout]  --> exercises/04_traits/07_deref/src/lib.rs:7:12
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub struct Ticket {
[INFO] [stdout]   |            ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout]   = note: `#[deny(unused_unconstructable_pub_struct)]` (part of `#[deny(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `status` is never read
[INFO] [stdout]   --> exercises/04_traits/07_deref/src/lib.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout]  7 | pub struct Ticket {
[INFO] [stdout]    |            ------ field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 10 |     status: String,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `deref` (lib) due to 1 previous error; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: function `intro` is never used
[INFO] [stdout]  --> exercises/06_ticket_management/00_intro/src/lib.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn intro() -> &'static str {
[INFO] [stdout]   |    ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "a6c9f241b01c8b6bed90ac0da11da43b29bdddc3cff8ceca5a1a0da611f126aa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a6c9f241b01c8b6bed90ac0da11da43b29bdddc3cff8ceca5a1a0da611f126aa", kill_on_drop: false }`
[INFO] [stdout] a6c9f241b01c8b6bed90ac0da11da43b29bdddc3cff8ceca5a1a0da611f126aa
