[INFO] cloning repository https://github.com/michal-hynek/ultimate-rust-fundations
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/michal-hynek/ultimate-rust-fundations" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmichal-hynek%2Fultimate-rust-fundations", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmichal-hynek%2Fultimate-rust-fundations'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1255415f1a30c79319eab266a400ce7cc7495505
[INFO] checking michal-hynek/ultimate-rust-fundations against master#779e19d8baa3e3625bd4fc5c85cbb2ad47b43155 for pr-147589-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmichal-hynek%2Fultimate-rust-fundations" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/michal-hynek/ultimate-rust-fundations
[INFO] finished tweaking git repo https://github.com/michal-hynek/ultimate-rust-fundations
[INFO] tweaked toml for git repo https://github.com/michal-hynek/ultimate-rust-fundations written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/michal-hynek/ultimate-rust-fundations on toolchain 779e19d8baa3e3625bd4fc5c85cbb2ad47b43155
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+779e19d8baa3e3625bd4fc5c85cbb2ad47b43155" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/michal-hynek/ultimate-rust-fundations 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" "+779e19d8baa3e3625bd4fc5c85cbb2ad47b43155" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+779e19d8baa3e3625bd4fc5c85cbb2ad47b43155" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
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[INFO] [stdout] warning: function `get_admin_usernames` is never used
[INFO] [stdout]   --> src/authentication/src/lib.rs:89:4
[INFO] [stdout]    |
[INFO] [stdout] 89 | fn get_admin_usernames() -> Vec<String> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
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[INFO] [stderr]     Checking recursion v0.1.0 (/opt/rustwide/workdir/src/recursion)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/recursion/src/main.rs:45:9
[INFO] [stdout]    |
[INFO] [stdout] 45 |     let mut future = async {
[INFO] [stdout]    |         ----^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `latitude`, `longitude`, and `current_weather` are never read
[INFO] [stdout]  --> src/restclient/src/main.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct Weather {
[INFO] [stdout]   |        ------- fields in this struct
[INFO] [stdout] 5 |     latitude: f64,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 6 |     longitude: f64,
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout] 7 |     current_weather: CurrentWeather,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Weather` 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] [stdout] warning: fields `temperature` and `windspeed` are never read
[INFO] [stdout]   --> src/restclient/src/main.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct CurrentWeather {
[INFO] [stdout]    |        -------------- fields in this struct
[INFO] [stdout] 12 |     temperature: f64,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 13 |     windspeed: f64,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `CurrentWeather` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused pinned boxed `Future` trait object that must be used
[INFO] [stdout]   --> src/recursion/src/main.rs:52:5
[INFO] [stdout]    |
[INFO] [stdout] 52 |     call_one_of_them(1).await;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: futures do nothing unless you `.await` or poll them
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused pinned boxed `Future` trait object that must be used
[INFO] [stdout]   --> src/recursion/src/main.rs:53:5
[INFO] [stdout]    |
[INFO] [stdout] 53 |     call_one_of_them(2).await;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: futures do nothing unless you `.await` or poll them
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking web_service v0.1.0 (/opt/rustwide/workdir/src/web_service)
[INFO] [stderr]     Checking dashing v0.1.0 (/opt/rustwide/workdir/src/dashing)
[INFO] [stderr]    Compiling sqlx-macros v0.8.6
[INFO] [stdout] warning: fields `latitude`, `longitude`, and `current_weather` are never read
[INFO] [stdout]  --> src/restclient/src/main.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct Weather {
[INFO] [stdout]   |        ------- fields in this struct
[INFO] [stdout] 5 |     latitude: f64,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 6 |     longitude: f64,
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout] 7 |     current_weather: CurrentWeather,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Weather` 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] [stdout] warning: fields `temperature` and `windspeed` are never read
[INFO] [stdout]   --> src/restclient/src/main.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct CurrentWeather {
[INFO] [stdout]    |        -------------- fields in this struct
[INFO] [stdout] 12 |     temperature: f64,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 13 |     windspeed: f64,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `CurrentWeather` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/recursion/src/main.rs:45:9
[INFO] [stdout]    |
[INFO] [stdout] 45 |     let mut future = async {
[INFO] [stdout]    |         ----^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused pinned boxed `Future` trait object that must be used
[INFO] [stdout]   --> src/recursion/src/main.rs:52:5
[INFO] [stdout]    |
[INFO] [stdout] 52 |     call_one_of_them(1).await;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: futures do nothing unless you `.await` or poll them
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused pinned boxed `Future` trait object that must be used
[INFO] [stdout]   --> src/recursion/src/main.rs:53:5
[INFO] [stdout]    |
[INFO] [stdout] 53 |     call_one_of_them(2).await;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: futures do nothing unless you `.await` or poll them
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking affinity v0.1.0 (/opt/rustwide/workdir/src/affinity)
[INFO] [stderr]     Checking logspan v0.1.0 (/opt/rustwide/workdir/src/logspan)
[INFO] [stderr]     Checking login v0.1.0 (/opt/rustwide/workdir/src/login)
[INFO] [stderr]     Checking workers2 v0.1.0 (/opt/rustwide/workdir/src/workers2)
[INFO] [stderr]     Checking bytes v0.1.0 (/opt/rustwide/workdir/src/bytes)
[INFO] [stderr]     Checking rayon_iters v0.1.0 (/opt/rustwide/workdir/src/rayon_iters)
[INFO] [stderr]     Checking rayon_scopes2 v0.1.0 (/opt/rustwide/workdir/src/rayon_scopes2)
[INFO] [stderr]     Checking rayon_iters2 v0.1.0 (/opt/rustwide/workdir/src/rayon_iters2)
[INFO] [stderr]     Checking rayon_scopes v0.1.0 (/opt/rustwide/workdir/src/rayon_scopes)
[INFO] [stderr]     Checking hello_async v0.1.0 (/opt/rustwide/workdir/src/hello_async)
[INFO] [stderr]     Checking errors4 v0.1.0 (/opt/rustwide/workdir/src/errors4)
[INFO] [stderr]     Checking errors5 v0.1.0 (/opt/rustwide/workdir/src/errors5)
[INFO] [stderr]     Checking errors3 v0.1.0 (/opt/rustwide/workdir/src/errors3)
[INFO] [stderr]     Checking collector v0.1.0 (/opt/rustwide/workdir/src/collector)
[INFO] [stdout] warning: variant `TooManyUsers` is never constructed
[INFO] [stdout]   --> src/errors5/src/main.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout]  8 | enum UsersError {
[INFO] [stdout]    |      ---------- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 12 |     TooManyUsers,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `UsersError` 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] [stdout] warning: function `send_command` is never used
[INFO] [stdout]   --> src/collector/src/sender.rs:39:8
[INFO] [stdout]    |
[INFO] [stdout] 39 | pub fn send_command(encoded_command: &[u8]) -> Result<(), CollectorError> {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking blocking3 v0.1.0 (/opt/rustwide/workdir/src/blocking3)
[INFO] [stderr]     Checking errors v0.1.0 (/opt/rustwide/workdir/src/errors)
[INFO] [stderr]     Checking hello_tokio4 v0.1.0 (/opt/rustwide/workdir/src/hello_tokio4)
[INFO] [stderr]     Checking broadcast v0.1.0 (/opt/rustwide/workdir/src/broadcast)
[INFO] [stderr]     Checking async_mutex v0.1.0 (/opt/rustwide/workdir/src/async_mutex)
[INFO] [stdout] warning: function `send_command` is never used
[INFO] [stdout]   --> src/collector/src/sender.rs:39:8
[INFO] [stdout]    |
[INFO] [stdout] 39 | pub fn send_command(encoded_command: &[u8]) -> Result<(), CollectorError> {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `TooManyUsers` is never constructed
[INFO] [stdout]   --> src/errors5/src/main.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout]  8 | enum UsersError {
[INFO] [stdout]    |      ---------- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 12 |     TooManyUsers,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `UsersError` 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 blocking v0.1.0 (/opt/rustwide/workdir/src/blocking)
[INFO] [stdout] warning: function `get_admin_usernames` is never used
[INFO] [stdout]   --> src/authentication/src/lib.rs:89:4
[INFO] [stdout]    |
[INFO] [stdout] 89 | fn get_admin_usernames() -> Vec<String> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking tcp_echo v0.1.0 (/opt/rustwide/workdir/src/tcp_echo)
[INFO] [stderr]     Checking hello_tokio v0.1.0 (/opt/rustwide/workdir/src/hello_tokio)
[INFO] [stderr]     Checking blocking2 v0.1.0 (/opt/rustwide/workdir/src/blocking2)
[INFO] [stderr]     Checking tokio_testing v0.1.0 (/opt/rustwide/workdir/src/tokio_testing)
[INFO] [stderr]     Checking errors2 v0.1.0 (/opt/rustwide/workdir/src/errors2)
[INFO] [stderr]     Checking fileio3 v0.1.0 (/opt/rustwide/workdir/src/fileio3)
[INFO] [stderr]     Checking fileio2 v0.1.0 (/opt/rustwide/workdir/src/fileio2)
[INFO] [stderr]     Checking hello_tokio2 v0.1.0 (/opt/rustwide/workdir/src/hello_tokio2)
[INFO] [stderr]     Checking tokio_select2 v0.1.0 (/opt/rustwide/workdir/src/tokio_select2)
[INFO] [stderr]     Checking sync_channel v0.1.0 (/opt/rustwide/workdir/src/sync_channel)
[INFO] [stderr]     Checking sqlx v0.8.6
[INFO] [stderr]     Checking tcp_echo_client v0.1.0 (/opt/rustwide/workdir/src/tcp_echo_client)
[INFO] [stderr]     Checking server v0.1.0 (/opt/rustwide/workdir/src/server)
[INFO] [stderr]     Checking db v0.1.0 (/opt/rustwide/workdir/src/db)
[INFO] [stderr]     Checking clap v4.5.38
[INFO] [stderr]     Checking login_manager v0.1.0 (/opt/rustwide/workdir/src/login_manager)
[INFO] [stderr]     Checking tokio_select v0.1.0 (/opt/rustwide/workdir/src/tokio_select)
[INFO] [stderr]     Checking hello_tokio3 v0.1.0 (/opt/rustwide/workdir/src/hello_tokio3)
[INFO] [stdout] warning: fields `id` and `message` are never read
[INFO] [stdout]  --> src/db/src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Message {
[INFO] [stdout]   |        ------- fields in this struct
[INFO] [stdout] 6 |     id: i64,
[INFO] [stdout]   |     ^^
[INFO] [stdout] 7 |     message: String,
[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] [stdout] warning: fields `id` and `message` are never read
[INFO] [stdout]  --> src/db/src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Message {
[INFO] [stdout]   |        ------- fields in this struct
[INFO] [stdout] 6 |     id: i64,
[INFO] [stdout]   |     ^^
[INFO] [stdout] 7 |     message: String,
[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]     Checking hello_tokio5 v0.1.0 (/opt/rustwide/workdir/src/hello_tokio5)
[INFO] [stderr]     Checking memory2 v0.1.0 (/opt/rustwide/workdir/src/memory2)
[INFO] [stderr]     Checking rwlocks v0.1.0 (/opt/rustwide/workdir/src/rwlocks)
[INFO] [stderr]     Checking mutexes v0.1.0 (/opt/rustwide/workdir/src/mutexes)
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]  --> src/memory2/src/main.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 2 |     let s = String::from("");
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking generics3 v0.1.0 (/opt/rustwide/workdir/src/generics3)
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]  --> src/memory2/src/main.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 2 |     let s = String::from("");
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking parking v0.1.0 (/opt/rustwide/workdir/src/parking)
[INFO] [stderr]     Checking hello_world v0.1.0 (/opt/rustwide/workdir/src/hello_world)
[INFO] [stderr]     Checking poisoning v0.1.0 (/opt/rustwide/workdir/src/poisoning)
[INFO] [stderr]     Checking hello_thread_return v0.1.0 (/opt/rustwide/workdir/src/hello_thread_return)
[INFO] [stderr]     Checking channels1 v0.1.0 (/opt/rustwide/workdir/src/channels1)
[INFO] [stderr]     Checking memory v0.1.0 (/opt/rustwide/workdir/src/memory)
[INFO] [stderr]     Checking hello_thread v0.1.0 (/opt/rustwide/workdir/src/hello_thread)
[INFO] [stderr]     Checking scoped_threads v0.1.0 (/opt/rustwide/workdir/src/scoped_threads)
[INFO] [stderr]     Checking thread_builder v0.1.0 (/opt/rustwide/workdir/src/thread_builder)
[INFO] [stderr]     Checking dropping v0.1.0 (/opt/rustwide/workdir/src/dropping)
[INFO] [stderr]     Checking generics2 v0.1.0 (/opt/rustwide/workdir/src/generics2)
[INFO] [stderr]     Checking fileio v0.1.0 (/opt/rustwide/workdir/src/fileio)
[INFO] [stderr]     Checking console_input v0.1.0 (/opt/rustwide/workdir/src/console_input)
[INFO] [stderr]     Checking deadlocks v0.1.0 (/opt/rustwide/workdir/src/deadlocks)
[INFO] [stderr]     Checking hello_thread_params v0.1.0 (/opt/rustwide/workdir/src/hello_thread_params)
[INFO] [stderr]     Checking traits2 v0.1.0 (/opt/rustwide/workdir/src/traits2)
[INFO] [stderr]     Checking generics v0.1.0 (/opt/rustwide/workdir/src/generics)
[INFO] [stderr]     Checking divide_work v0.1.0 (/opt/rustwide/workdir/src/divide_work)
[INFO] [stderr]     Checking dropping3 v0.1.0 (/opt/rustwide/workdir/src/dropping3)
[INFO] [stdout] warning: function `get_animal` is never used
[INFO] [stdout]   --> src/traits2/src/main.rs:30:4
[INFO] [stdout]    |
[INFO] [stdout] 30 | fn get_animal() -> impl Animal {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking cycles v0.1.0 (/opt/rustwide/workdir/src/cycles)
[INFO] [stderr]     Checking refc v0.1.0 (/opt/rustwide/workdir/src/refc)
[INFO] [stderr]     Checking dropping2 v0.1.0 (/opt/rustwide/workdir/src/dropping2)
[INFO] [stderr]     Checking ravif v0.11.20
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/cycles/src/main.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 12 |     Strong(Rc<Node>),
[INFO] [stdout]    |     ------ ^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `NextNode` 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] 12 -     Strong(Rc<Node>),
[INFO] [stdout] 12 +     Strong(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/cycles/src/main.rs:13:10
[INFO] [stdout]    |
[INFO] [stdout] 13 |     Weak(Weak<Node>),
[INFO] [stdout]    |     ---- ^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `NextNode` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 13 -     Weak(Weak<Node>),
[INFO] [stdout] 13 +     Weak(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking bytes2 v0.1.0 (/opt/rustwide/workdir/src/bytes2)
[INFO] [stderr]     Checking traits v0.1.0 (/opt/rustwide/workdir/src/traits)
[INFO] [stderr]     Checking greet v0.1.0 (/opt/rustwide/workdir/src/greet)
[INFO] [stderr]     Checking refc2 v0.1.0 (/opt/rustwide/workdir/src/refc2)
[INFO] [stdout] warning: fields `id` and `x` are never read
[INFO] [stdout]   --> src/dropping2/src/main.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 18 | struct HasDropables {
[INFO] [stdout]    |        ------------ fields in this struct
[INFO] [stdout] 19 |     id: i32,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 20 |     x: MyStruct,
[INFO] [stdout]    |     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking packing v0.1.0 (/opt/rustwide/workdir/src/packing)
[INFO] [stderr]     Checking footgun v0.1.0 (/opt/rustwide/workdir/src/footgun)
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/refc2/src/main.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |     for i in 0..10 {
[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: field `a` is never read
[INFO] [stdout]  --> src/packing/src/main.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct OneByte {
[INFO] [stdout]   |        ------- field in this struct
[INFO] [stdout] 2 |     a: u8,
[INFO] [stdout]   |     ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `a` is never read
[INFO] [stdout]  --> src/packing/src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct TwoBytes {
[INFO] [stdout]   |        -------- field in this struct
[INFO] [stdout] 6 |     a: u16,
[INFO] [stdout]   |     ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `a` is never read
[INFO] [stdout]   --> src/packing/src/main.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | struct FourBytes {
[INFO] [stdout]    |        --------- field in this struct
[INFO] [stdout] 16 |     a: u32,
[INFO] [stdout]    |     ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking traits3 v0.1.0 (/opt/rustwide/workdir/src/traits3)
[INFO] [stderr]     Checking traits4 v0.1.0 (/opt/rustwide/workdir/src/traits4)
[INFO] [stderr]     Checking atomics v0.1.0 (/opt/rustwide/workdir/src/atomics)
[INFO] [stderr]     Checking iterators2 v0.1.0 (/opt/rustwide/workdir/src/iterators2)
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/cycles/src/main.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 12 |     Strong(Rc<Node>),
[INFO] [stdout]    |     ------ ^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `NextNode` 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] 12 -     Strong(Rc<Node>),
[INFO] [stdout] 12 +     Strong(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/cycles/src/main.rs:13:10
[INFO] [stdout]    |
[INFO] [stdout] 13 |     Weak(Weak<Node>),
[INFO] [stdout]    |     ---- ^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `NextNode` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 13 -     Weak(Weak<Node>),
[INFO] [stdout] 13 +     Weak(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking refc4 v0.1.0 (/opt/rustwide/workdir/src/refc4)
[INFO] [stderr]     Checking top_level v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking lifetimes2 v0.1.0 (/opt/rustwide/workdir/src/lifetimes2)
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/iterators2/src/main.rs:23:13
[INFO] [stdout]    |
[INFO] [stdout] 23 |     fn iter(&self) -> HashMapBucketIter<K, V> {
[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] 23 |     fn iter(&self) -> HashMapBucketIter<'_, K, V> {
[INFO] [stdout]    |                                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking refc3 v0.1.0 (/opt/rustwide/workdir/src/refc3)
[INFO] [stderr]     Checking image v0.25.6
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/refc2/src/main.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |     for i in 0..10 {
[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: fields `id` and `x` are never read
[INFO] [stdout]   --> src/dropping2/src/main.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 18 | struct HasDropables {
[INFO] [stdout]    |        ------------ fields in this struct
[INFO] [stdout] 19 |     id: i32,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 20 |     x: MyStruct,
[INFO] [stdout]    |     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking lifetimes v0.1.0 (/opt/rustwide/workdir/src/lifetimes)
[INFO] [stderr]     Checking iterators v0.1.0 (/opt/rustwide/workdir/src/iterators)
[INFO] [stdout] warning: field `a` is never read
[INFO] [stdout]  --> src/packing/src/main.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct OneByte {
[INFO] [stdout]   |        ------- field in this struct
[INFO] [stdout] 2 |     a: u8,
[INFO] [stdout]   |     ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `a` is never read
[INFO] [stdout]  --> src/packing/src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct TwoBytes {
[INFO] [stdout]   |        -------- field in this struct
[INFO] [stdout] 6 |     a: u16,
[INFO] [stdout]   |     ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `a` is never read
[INFO] [stdout]   --> src/packing/src/main.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | struct FourBytes {
[INFO] [stdout]    |        --------- field in this struct
[INFO] [stdout] 16 |     a: u32,
[INFO] [stdout]    |     ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/iterators2/src/main.rs:23:13
[INFO] [stdout]    |
[INFO] [stdout] 23 |     fn iter(&self) -> HashMapBucketIter<K, V> {
[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] 23 |     fn iter(&self) -> HashMapBucketIter<'_, K, V> {
[INFO] [stdout]    |                                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking workers v0.1.0 (/opt/rustwide/workdir/src/workers)
[INFO] [stdout] warning: function `get_animal` is never used
[INFO] [stdout]   --> src/traits2/src/main.rs:30:4
[INFO] [stdout]    |
[INFO] [stdout] 30 | fn get_animal() -> impl Animal {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking refc5 v0.1.0 (/opt/rustwide/workdir/src/refc5)
[INFO] [stderr]     Checking thumbnail_server v0.1.0 (/opt/rustwide/workdir/src/thumbnail_server)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3m 11s
[INFO] running `Command { std: "docker" "inspect" "c33e68a862b1aa5f21902305f6251fe5336cf3b8406fd4421db948daacf0283a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c33e68a862b1aa5f21902305f6251fe5336cf3b8406fd4421db948daacf0283a", kill_on_drop: false }`
[INFO] [stdout] c33e68a862b1aa5f21902305f6251fe5336cf3b8406fd4421db948daacf0283a
