[INFO] cloning repository https://github.com/eltondornelas/alabs-live
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/eltondornelas/alabs-live" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Feltondornelas%2Falabs-live", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Feltondornelas%2Falabs-live'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f8d85fb87d6194a088729fefa0751cb80b3d4353
[INFO] checking eltondornelas/alabs-live against dfbea5bc945a9d7ff017d3d4bfbd1af9295fe5b8 for pr-133502-26
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Feltondornelas%2Falabs-live" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/eltondornelas/alabs-live
[INFO] finished tweaking git repo https://github.com/eltondornelas/alabs-live
[INFO] tweaked toml for git repo https://github.com/eltondornelas/alabs-live written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/eltondornelas/alabs-live on toolchain dfbea5bc945a9d7ff017d3d4bfbd1af9295fe5b8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dfbea5bc945a9d7ff017d3d4bfbd1af9295fe5b8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/eltondornelas/alabs-live 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" "+dfbea5bc945a9d7ff017d3d4bfbd1af9295fe5b8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded bytemuck_derive v1.10.1
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[INFO] [stderr]   Downloaded openssl-src v300.5.1+3.5.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:1fa6594d87c8fa7b311925a7a77a16f539833322d9dfba4ce891f211db2f90b1" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] e3900189e502c85cc299263aa94ce3019cca6c3b0e9dcb1ece76c096ccb4a7a5
[INFO] running `Command { std: "docker" "start" "e3900189e502c85cc299263aa94ce3019cca6c3b0e9dcb1ece76c096ccb4a7a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e3900189e502c85cc299263aa94ce3019cca6c3b0e9dcb1ece76c096ccb4a7a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "e3900189e502c85cc299263aa94ce3019cca6c3b0e9dcb1ece76c096ccb4a7a5" "/opt/rustwide/cargo-home/bin/cargo" "+dfbea5bc945a9d7ff017d3d4bfbd1af9295fe5b8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e3900189e502c85cc299263aa94ce3019cca6c3b0e9dcb1ece76c096ccb4a7a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "e3900189e502c85cc299263aa94ce3019cca6c3b0e9dcb1ece76c096ccb4a7a5" "/opt/rustwide/cargo-home/bin/cargo" "+dfbea5bc945a9d7ff017d3d4bfbd1af9295fe5b8" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]     Checking smallvec v1.15.0
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[INFO] [stderr]    Compiling libc v0.2.174
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[INFO] [stderr]    Compiling thiserror v2.0.15
[INFO] [stderr]    Compiling thiserror-impl v2.0.15
[INFO] [stderr]    Compiling openssl v0.10.73
[INFO] [stderr]    Compiling crossbeam-utils v0.8.21
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[INFO] [stderr]    Compiling crossbeam-queue v0.3.12
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[INFO] [stderr]     Checking half v2.6.0
[INFO] [stderr]     Checking uuid v1.18.0
[INFO] [stderr]     Checking clap_builder v4.5.37
[INFO] [stderr]     Checking tiff v0.9.1
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[INFO] [stderr]     Checking thiserror v1.0.69
[INFO] [stderr]     Checking bytemuck v1.23.2
[INFO] [stderr]    Compiling clap_derive v4.5.32
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[INFO] [stderr]     Checking thread_local v1.1.9
[INFO] [stderr]     Checking shared_data v0.1.0 (/opt/rustwide/workdir/session6/shared_data)
[INFO] [stderr]     Checking exr v1.73.0
[INFO] [stderr]     Checking qoi v0.4.1
[INFO] [stderr]     Checking dashmap v6.1.0
[INFO] [stderr]     Checking tracing-subscriber v0.3.19
[INFO] [stderr]     Checking core_affinity v0.8.3
[INFO] [stderr]     Checking tokio-util v0.7.16
[INFO] [stderr]     Checking tower v0.5.2
[INFO] [stderr]     Checking thread-priority v1.2.0
[INFO] [stderr]    Compiling async-recursion v1.1.1
[INFO] [stderr]     Checking memmap2 v0.9.7
[INFO] [stderr]     Checking sysinfo v0.36.1
[INFO] [stderr]     Checking priority v0.1.0 (/opt/rustwide/workdir/session2/priority)
[INFO] [stdout] warning: static `HIGH_COUNT` is never used
[INFO] [stdout]  --> session2/priority/src/main.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | static HIGH_COUNT: AtomicI32 = AtomicI32::new(0);
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static `HIGH_COUNT` is never used
[INFO] [stdout]  --> session2/priority/src/main.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | static HIGH_COUNT: AtomicI32 = AtomicI32::new(0);
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking file_read v0.1.0 (/opt/rustwide/workdir/bonus/file_read)
[INFO] [stderr]     Checking dashing v0.1.0 (/opt/rustwide/workdir/session2/dashing)
[INFO] [stderr]     Checking h2 v0.4.11
[INFO] [stdout] warning: unused import: `std::fs::read_to_string`
[INFO] [stdout]  --> bonus/file_read/src/main.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fs::read_to_string;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking tokio-stream v0.1.17
[INFO] [stderr]     Checking tower-http v0.6.6
[INFO] [stderr]     Checking affinity v0.1.0 (/opt/rustwide/workdir/session2/affinity)
[INFO] [stdout] warning: unused import: `std::fs::read_to_string`
[INFO] [stdout]  --> bonus/file_read/src/main.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fs::read_to_string;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking channels v0.1.0 (/opt/rustwide/workdir/session3/channels)
[INFO] [stderr]     Checking tokio_select2 v0.1.0 (/opt/rustwide/workdir/session3/tokio_select2)
[INFO] [stderr]     Checking recursion v0.1.0 (/opt/rustwide/workdir/session3/recursion)
[INFO] [stderr]     Checking collector v0.1.0 (/opt/rustwide/workdir/session6/collector)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> session3/recursion/src/main.rs:56:9
[INFO] [stdout]    |
[INFO] [stdout] 56 |     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] [stderr]     Checking hello_tokio v0.1.0 (/opt/rustwide/workdir/session3/hello_tokio)
[INFO] [stderr]     Checking fileio v0.1.0 (/opt/rustwide/workdir/session3/fileio)
[INFO] [stderr]     Checking tokio_testing v0.1.0 (/opt/rustwide/workdir/session3/tokio_testing)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> session3/recursion/src/main.rs:56:9
[INFO] [stdout]    |
[INFO] [stdout] 56 |     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: function `double` is never used
[INFO] [stdout]  --> session3/tokio_testing/src/lib.rs:1:10
[INFO] [stdout]   |
[INFO] [stdout] 1 | async fn double(n: 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 tokio_select v0.1.0 (/opt/rustwide/workdir/session3/tokio_select)
[INFO] [stderr]     Checking tcp_server v0.1.0 (/opt/rustwide/workdir/session3/tcp_server)
[INFO] [stdout] warning: function `read_lines` is never used
[INFO] [stdout]   --> session3/fileio/src/main.rs:34:4
[INFO] [stdout]    |
[INFO] [stdout] 34 | fn read_lines<P>(filename: P) -> io::Result<io::Lines<io::BufReader<File>>>
[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 `line_count` is never used
[INFO] [stdout]   --> session3/fileio/src/main.rs:42:10
[INFO] [stdout]    |
[INFO] [stdout] 42 | async fn line_count(filename: String) -> anyhow::Result<usize> {
[INFO] [stdout]    |          ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking blocking v0.1.0 (/opt/rustwide/workdir/session3/blocking)
[INFO] [stderr]     Checking logspan v0.1.0 (/opt/rustwide/workdir/session4/logspan)
[INFO] [stderr]     Checking rav1e v0.7.1
[INFO] [stderr]     Checking hello_tokio2 v0.1.0 (/opt/rustwide/workdir/session3/hello_tokio2)
[INFO] [stderr]     Checking errors v0.1.0 (/opt/rustwide/workdir/session3/errors)
[INFO] [stdout] warning: function `hello2` is never used
[INFO] [stdout]  --> session3/hello_tokio2/src/main.rs:6:10
[INFO] [stdout]   |
[INFO] [stdout] 6 | async fn hello2() -> 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 async_mutex v0.1.0 (/opt/rustwide/workdir/session3/async_mutex)
[INFO] [stdout] warning: enum `UsersError` is never used
[INFO] [stdout]  --> session3/errors/src/main.rs:6:6
[INFO] [stdout]   |
[INFO] [stdout] 6 | enum UsersError {
[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 `User` is never constructed
[INFO] [stdout]   --> session3/errors/src/main.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 24 | struct User {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `GenericResult` is never used
[INFO] [stdout]   --> session3/errors/src/main.rs:28:6
[INFO] [stdout]    |
[INFO] [stdout] 28 | type GenericResult<T> = std::result::Result<T, Box<dyn std::error::Error>>;
[INFO] [stdout]    |      ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `load_users` is never used
[INFO] [stdout]   --> session3/errors/src/main.rs:33:4
[INFO] [stdout]    |
[INFO] [stdout] 33 | fn load_users() -> Result<Vec<User>, UsersError> {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `UsersError` is never used
[INFO] [stdout]  --> session3/errors/src/main.rs:6:6
[INFO] [stdout]   |
[INFO] [stdout] 6 | enum UsersError {
[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 `User` is never constructed
[INFO] [stdout]   --> session3/errors/src/main.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 24 | struct User {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `GenericResult` is never used
[INFO] [stdout]   --> session3/errors/src/main.rs:28:6
[INFO] [stdout]    |
[INFO] [stdout] 28 | type GenericResult<T> = std::result::Result<T, Box<dyn std::error::Error>>;
[INFO] [stdout]    |      ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `load_users` is never used
[INFO] [stdout]   --> session3/errors/src/main.rs:33:4
[INFO] [stdout]    |
[INFO] [stdout] 33 | fn load_users() -> Result<Vec<User>, UsersError> {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking bytes v0.1.0 (/opt/rustwide/workdir/session5/bytes)
[INFO] [stdout] warning: function `hello2` is never used
[INFO] [stdout]  --> session3/hello_tokio2/src/main.rs:6:10
[INFO] [stdout]   |
[INFO] [stdout] 6 | async fn hello2() -> 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 `read_lines` is never used
[INFO] [stdout]   --> session3/fileio/src/main.rs:34:4
[INFO] [stdout]    |
[INFO] [stdout] 34 | fn read_lines<P>(filename: P) -> io::Result<io::Lines<io::BufReader<File>>>
[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 `line_count` is never used
[INFO] [stdout]   --> session3/fileio/src/main.rs:42:10
[INFO] [stdout]    |
[INFO] [stdout] 42 | async fn line_count(filename: String) -> anyhow::Result<usize> {
[INFO] [stdout]    |          ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking login v0.1.0 (/opt/rustwide/workdir/session1/login)
[INFO] [stderr]     Checking workers2 v0.1.0 (/opt/rustwide/workdir/session2/workers2)
[INFO] [stderr]     Checking hello_async v0.1.0 (/opt/rustwide/workdir/session3/hello_async)
[INFO] [stderr]     Checking rayon_iters v0.1.0 (/opt/rustwide/workdir/session2/rayon_iters)
[INFO] [stderr]     Checking favor_iterators v0.1.0 (/opt/rustwide/workdir/bonus/favor_iterators)
[INFO] [stderr]     Checking rayon_scopes v0.1.0 (/opt/rustwide/workdir/session2/rayon_scopes)
[INFO] [stderr]     Checking memory v0.1.0 (/opt/rustwide/workdir/session5/memory)
[INFO] [stderr]     Checking rwlocks v0.1.0 (/opt/rustwide/workdir/session2/rwlocks)
[INFO] [stdout] warning: unused import: `std::ops::Index`
[INFO] [stdout]  --> bonus/favor_iterators/src/main.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::ops::Index;
[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 `test` is never used
[INFO] [stdout]  --> session2/rayon_scopes/src/main.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn test() {
[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 `test` is never used
[INFO] [stdout]  --> session2/rayon_scopes/src/main.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn test() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Index`
[INFO] [stdout]  --> bonus/favor_iterators/src/main.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::ops::Index;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> bonus/favor_iterators/src/main.rs:94:9
[INFO] [stdout]    |
[INFO] [stdout] 94 |     let mut v = vec!["one".to_string(), "two".to_string()];
[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: variable does not need to be mutable
[INFO] [stdout]   --> bonus/favor_iterators/src/main.rs:98:9
[INFO] [stdout]    |
[INFO] [stdout] 98 |     let mut v = vec!["one".to_string(), "two".to_string()];
[INFO] [stdout]    |         ----^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking dropping v0.1.0 (/opt/rustwide/workdir/session5/dropping)
[INFO] [stderr]     Checking iterators v0.1.0 (/opt/rustwide/workdir/session5/iterators)
[INFO] [stderr]     Checking traits v0.1.0 (/opt/rustwide/workdir/session5/traits)
[INFO] [stderr]     Checking parking v0.1.0 (/opt/rustwide/workdir/session2/parking)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> bonus/favor_iterators/src/main.rs:94:9
[INFO] [stdout]    |
[INFO] [stdout] 94 |     let mut v = vec!["one".to_string(), "two".to_string()];
[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: variable does not need to be mutable
[INFO] [stdout]   --> bonus/favor_iterators/src/main.rs:98:9
[INFO] [stdout]    |
[INFO] [stdout] 98 |     let mut v = vec!["one".to_string(), "two".to_string()];
[INFO] [stdout]    |         ----^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking hello v0.1.0 (/opt/rustwide/workdir/session2/hello)
[INFO] [stderr]     Checking workers v0.1.0 (/opt/rustwide/workdir/session2/workers)
[INFO] [stdout] warning: unused variable: `my_num`
[INFO] [stdout]   --> session5/dropping/src/main.rs:53:9
[INFO] [stdout]    |
[INFO] [stdout] 53 |     let my_num = Box::new(12); // does samething of the "SmartPointer"
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_my_num`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking ffi v0.1.0 (/opt/rustwide/workdir/session5/ffi)
[INFO] [stderr]     Checking lifetimes v0.1.0 (/opt/rustwide/workdir/session5/lifetimes)
[INFO] [stdout] warning: function `hello_thread` is never used
[INFO] [stdout]  --> session2/hello/src/main.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn hello_thread(n: 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: unused variable: `j`
[INFO] [stdout]  --> session5/lifetimes/src/main.rs:1:27
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn borrow<'a>(i: &'a i32, j: &'a i32) -> &'a i32 {
[INFO] [stdout]   |                           ^ help: if this is intentional, prefix it with an underscore: `_j`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `borrow` is never used
[INFO] [stdout]  --> session5/lifetimes/src/main.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn borrow<'a>(i: &'a i32, j: &'a i32) -> &'a i32 {
[INFO] [stdout]   |    ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking variables v0.1.0 (/opt/rustwide/workdir/session1/variables)
[INFO] [stderr]     Checking deadlocks v0.1.0 (/opt/rustwide/workdir/session2/deadlocks)
[INFO] [stderr]     Checking memory_fragmentation v0.1.0 (/opt/rustwide/workdir/session5/memory_fragmentation)
[INFO] [stderr]     Checking divide_work v0.1.0 (/opt/rustwide/workdir/session2/divide_work)
[INFO] [stderr]     Checking hello_world v0.1.0 (/opt/rustwide/workdir/session1/hello_world)
[INFO] [stderr]     Checking cycles v0.1.0 (/opt/rustwide/workdir/session5/cycles)
[INFO] [stdout] warning: trait `DowncastableAnimal` is never used
[INFO] [stdout]   --> session5/traits/src/main.rs:36:11
[INFO] [stdout]    |
[INFO] [stdout] 36 |     trait DowncastableAnimal {
[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 `Tortoise` is never constructed
[INFO] [stdout]   --> session5/traits/src/main.rs:43:12
[INFO] [stdout]    |
[INFO] [stdout] 43 |     struct Tortoise;
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fmt::format`
[INFO] [stdout]  --> session1/variables/src/main.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fmt::format;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking alab-live v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `double_or_nothing` is never used
[INFO] [stdout]  --> session1/variables/src/main.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn double_or_nothing(n: i32) -> i32 {
[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 `greet` is never used
[INFO] [stdout]   --> session1/variables/src/main.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn greet(s: String) {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `greet_borrow` is never used
[INFO] [stdout]   --> session1/variables/src/main.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn greet_borrow(s: &String) {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `greet_borrow_mut` is never used
[INFO] [stdout]   --> session1/variables/src/main.rs:19:4
[INFO] [stdout]    |
[INFO] [stdout] 19 | fn greet_borrow_mut(s: &mut String) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking scope_threads v0.1.0 (/opt/rustwide/workdir/session2/scope_threads)
[INFO] [stdout] warning: unused variable: `my_shared`
[INFO] [stdout]  --> session2/deadlocks/src/main.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let my_shared = Mutex::new(0);
[INFO] [stdout]   |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_my_shared`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking packing v0.1.0 (/opt/rustwide/workdir/session5/packing)
[INFO] [stderr]     Checking best v0.1.0 (/opt/rustwide/workdir/bonus/best)
[INFO] [stderr]     Checking thread_builder v0.1.0 (/opt/rustwide/workdir/session2/thread_builder)
[INFO] [stderr]     Checking generics v0.1.0 (/opt/rustwide/workdir/session5/generics)
[INFO] [stdout] warning: function `cycle_problem_example` is never used
[INFO] [stdout]  --> session5/cycles/src/main.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn cycle_problem_example() {
[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 `0` is never read
[INFO] [stdout]   --> session5/cycles/src/main.rs:48:12
[INFO] [stdout]    |
[INFO] [stdout] 48 |     Strong(Rc<Node>), // strong reference/pointer
[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] 48 -     Strong(Rc<Node>), // strong reference/pointer
[INFO] [stdout] 48 +     Strong(()), // strong reference/pointer
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> session5/cycles/src/main.rs:49:10
[INFO] [stdout]    |
[INFO] [stdout] 49 |     Weak(Weak<Node>), // creating a weak link
[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] 49 -     Weak(Weak<Node>), // creating a weak link
[INFO] [stdout] 49 +     Weak(()), // creating a weak link
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking dropping_raii v0.1.0 (/opt/rustwide/workdir/session5/dropping_raii)
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> session5/dropping_raii/src/main.rs:24:12
[INFO] [stdout]    |
[INFO] [stdout] 24 | fn move_me(x: MyStruct) {
[INFO] [stdout]    |            ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking channels1 v0.1.0 (/opt/rustwide/workdir/session2/channels1)
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]   --> session5/dropping_raii/src/main.rs:31:13
[INFO] [stdout]    |
[INFO] [stdout] 31 |         let y = MyStruct::new(2);
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `has_drop`
[INFO] [stdout]   --> session5/dropping_raii/src/main.rs:37:9
[INFO] [stdout]    |
[INFO] [stdout] 37 |     let has_drop = HasDroppables { x: MyStruct::new(4) };
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_has_drop`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `x` is never read
[INFO] [stdout]  --> session5/dropping_raii/src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct HasDroppables {
[INFO] [stdout]   |        ------------- field in this struct
[INFO] [stdout] 6 |     x: MyStruct,
[INFO] [stdout]   |     ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> bonus/best/src/main.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     for i in 0..17 {
[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: constant `N` is never used
[INFO] [stdout]   --> bonus/best/src/main.rs:17:15
[INFO] [stdout]    |
[INFO] [stdout] 17 |         const N:i32 = 1;
[INFO] [stdout]    |               ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `DowncastableAnimal` is never used
[INFO] [stdout]   --> session5/traits/src/main.rs:36:11
[INFO] [stdout]    |
[INFO] [stdout] 36 |     trait DowncastableAnimal {
[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 `Tortoise` is never constructed
[INFO] [stdout]   --> session5/traits/src/main.rs:43:12
[INFO] [stdout]    |
[INFO] [stdout] 43 |     struct Tortoise;
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `a` is never read
[INFO] [stdout]  --> session5/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]  --> session5/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]   --> session5/packing/src/main.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 18 | struct FourBytes {
[INFO] [stdout]    |        --------- field in this struct
[INFO] [stdout] 19 |     a: u32,
[INFO] [stdout]    |     ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking mutexes v0.1.0 (/opt/rustwide/workdir/session2/mutexes)
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]  --> session5/generics/src/main.rs:3:34
[INFO] [stdout]   |
[INFO] [stdout] 3 |     fn just_print_it<T, U>(x: T, y: U)
[INFO] [stdout]   |                                  ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `behind_you_radians`
[INFO] [stdout]   --> session5/generics/src/main.rs:37:9
[INFO] [stdout]    |
[INFO] [stdout] 37 |     let behind_you_radians = Radians::from(behind_you);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_behind_you_radians`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `behind_you_radians2`
[INFO] [stdout]   --> session5/generics/src/main.rs:38:9
[INFO] [stdout]    |
[INFO] [stdout] 38 |     let behind_you_radians2: Radians = Degrees(180.0).into();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_behind_you_radians2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `generics_example_1` is never used
[INFO] [stdout]  --> session5/generics/src/main.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn generics_example_1() {
[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 `generics_example_2` is never used
[INFO] [stdout]   --> session5/generics/src/main.rs:15:4
[INFO] [stdout]    |
[INFO] [stdout] 15 | fn generics_example_2() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> session5/generics/src/main.rs:85:17
[INFO] [stdout]    |
[INFO] [stdout] 85 |         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] 85 |         fn iter(&self) -> HashMapBucketIter<'_, K, V> {
[INFO] [stdout]    |                                             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking refc v0.1.0 (/opt/rustwide/workdir/session5/refc)
[INFO] [stderr]     Checking footgun v0.1.0 (/opt/rustwide/workdir/session2/footgun)
[INFO] [stdout] warning: function `hello_thread` is never used
[INFO] [stdout]  --> session2/hello/src/main.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn hello_thread(n: 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: unused variable: `my_num`
[INFO] [stdout]   --> session5/dropping/src/main.rs:53:9
[INFO] [stdout]    |
[INFO] [stdout] 53 |     let my_num = Box::new(12); // does samething of the "SmartPointer"
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_my_num`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `my_shared`
[INFO] [stdout]  --> session2/deadlocks/src/main.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let my_shared = Mutex::new(0);
[INFO] [stdout]   |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_my_shared`
[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]   --> session5/dropping_raii/src/main.rs:24:12
[INFO] [stdout]    |
[INFO] [stdout] 24 | fn move_me(x: MyStruct) {
[INFO] [stdout]    |            ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]   --> session5/dropping_raii/src/main.rs:31:13
[INFO] [stdout]    |
[INFO] [stdout] 31 |         let y = MyStruct::new(2);
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `has_drop`
[INFO] [stdout]   --> session5/dropping_raii/src/main.rs:37:9
[INFO] [stdout]    |
[INFO] [stdout] 37 |     let has_drop = HasDroppables { x: MyStruct::new(4) };
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_has_drop`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `x` is never read
[INFO] [stdout]  --> session5/dropping_raii/src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct HasDroppables {
[INFO] [stdout]   |        ------------- field in this struct
[INFO] [stdout] 6 |     x: MyStruct,
[INFO] [stdout]   |     ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `j`
[INFO] [stdout]  --> session5/lifetimes/src/main.rs:1:27
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn borrow<'a>(i: &'a i32, j: &'a i32) -> &'a i32 {
[INFO] [stdout]   |                           ^ help: if this is intentional, prefix it with an underscore: `_j`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `borrow` is never used
[INFO] [stdout]  --> session5/lifetimes/src/main.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn borrow<'a>(i: &'a i32, j: &'a i32) -> &'a i32 {
[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]  --> session5/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]  --> session5/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]   --> session5/packing/src/main.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 18 | struct FourBytes {
[INFO] [stdout]    |        --------- field in this struct
[INFO] [stdout] 19 |     a: u32,
[INFO] [stdout]    |     ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `arc_example_3` is never used
[INFO] [stdout]  --> session5/refc/src/main.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn arc_example_3() {
[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]  --> session5/refc/src/main.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 8 |     impl SharedData {
[INFO] [stdout]   |     --------------- associated function in this implementation
[INFO] [stdout] 9 |         fn new(s: &str) -> Self {
[INFO] [stdout]   |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `arc_example_2` is never used
[INFO] [stdout]   --> session5/refc/src/main.rs:32:4
[INFO] [stdout]    |
[INFO] [stdout] 32 | fn arc_example_2() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `arc_example_1` is never used
[INFO] [stdout]   --> session5/refc/src/main.rs:55:4
[INFO] [stdout]    |
[INFO] [stdout] 55 | fn arc_example_1() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> session5/refc/src/main.rs:60:12
[INFO] [stdout]    |
[INFO] [stdout] 59 |     impl Droppable {
[INFO] [stdout]    |     -------------- associated function in this implementation
[INFO] [stdout] 60 |         fn new(n: i32) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `rc_example` is never used
[INFO] [stdout]    --> session5/refc/src/main.rs:100:4
[INFO] [stdout]     |
[INFO] [stdout] 100 | fn rc_example() {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> session5/refc/src/main.rs:107:12
[INFO] [stdout]     |
[INFO] [stdout] 106 |     impl Droppable {
[INFO] [stdout]     |     -------------- associated function in this implementation
[INFO] [stdout] 107 |         fn new(n: i32) -> Self {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]  --> session5/generics/src/main.rs:3:34
[INFO] [stdout]   |
[INFO] [stdout] 3 |     fn just_print_it<T, U>(x: T, y: U)
[INFO] [stdout]   |                                  ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `behind_you_radians`
[INFO] [stdout]   --> session5/generics/src/main.rs:37:9
[INFO] [stdout]    |
[INFO] [stdout] 37 |     let behind_you_radians = Radians::from(behind_you);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_behind_you_radians`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `behind_you_radians2`
[INFO] [stdout]   --> session5/generics/src/main.rs:38:9
[INFO] [stdout]    |
[INFO] [stdout] 38 |     let behind_you_radians2: Radians = Degrees(180.0).into();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_behind_you_radians2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `generics_example_1` is never used
[INFO] [stdout]  --> session5/generics/src/main.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn generics_example_1() {
[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 `generics_example_2` is never used
[INFO] [stdout]   --> session5/generics/src/main.rs:15:4
[INFO] [stdout]    |
[INFO] [stdout] 15 | fn generics_example_2() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> session5/generics/src/main.rs:85:17
[INFO] [stdout]    |
[INFO] [stdout] 85 |         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] 85 |         fn iter(&self) -> HashMapBucketIter<'_, K, V> {
[INFO] [stdout]    |                                             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fmt::format`
[INFO] [stdout]  --> session1/variables/src/main.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fmt::format;
[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 `double_or_nothing` is never used
[INFO] [stdout]  --> session1/variables/src/main.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn double_or_nothing(n: i32) -> i32 {
[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 `greet` is never used
[INFO] [stdout]   --> session1/variables/src/main.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn greet(s: String) {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `greet_borrow` is never used
[INFO] [stdout]   --> session1/variables/src/main.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn greet_borrow(s: &String) {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `greet_borrow_mut` is never used
[INFO] [stdout]   --> session1/variables/src/main.rs:19:4
[INFO] [stdout]    |
[INFO] [stdout] 19 | fn greet_borrow_mut(s: &mut String) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `cycle_problem_example` is never used
[INFO] [stdout]  --> session5/cycles/src/main.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn cycle_problem_example() {
[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 `0` is never read
[INFO] [stdout]   --> session5/cycles/src/main.rs:48:12
[INFO] [stdout]    |
[INFO] [stdout] 48 |     Strong(Rc<Node>), // strong reference/pointer
[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] 48 -     Strong(Rc<Node>), // strong reference/pointer
[INFO] [stdout] 48 +     Strong(()), // strong reference/pointer
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> session5/cycles/src/main.rs:49:10
[INFO] [stdout]    |
[INFO] [stdout] 49 |     Weak(Weak<Node>), // creating a weak link
[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] 49 -     Weak(Weak<Node>), // creating a weak link
[INFO] [stdout] 49 +     Weak(()), // creating a weak link
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> bonus/best/src/main.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     for i in 0..17 {
[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: constant `N` is never used
[INFO] [stdout]   --> bonus/best/src/main.rs:17:15
[INFO] [stdout]    |
[INFO] [stdout] 17 |         const N:i32 = 1;
[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 `arc_example_3` is never used
[INFO] [stdout]  --> session5/refc/src/main.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn arc_example_3() {
[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]  --> session5/refc/src/main.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 8 |     impl SharedData {
[INFO] [stdout]   |     --------------- associated function in this implementation
[INFO] [stdout] 9 |         fn new(s: &str) -> Self {
[INFO] [stdout]   |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `arc_example_2` is never used
[INFO] [stdout]   --> session5/refc/src/main.rs:32:4
[INFO] [stdout]    |
[INFO] [stdout] 32 | fn arc_example_2() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `arc_example_1` is never used
[INFO] [stdout]   --> session5/refc/src/main.rs:55:4
[INFO] [stdout]    |
[INFO] [stdout] 55 | fn arc_example_1() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> session5/refc/src/main.rs:60:12
[INFO] [stdout]    |
[INFO] [stdout] 59 |     impl Droppable {
[INFO] [stdout]    |     -------------- associated function in this implementation
[INFO] [stdout] 60 |         fn new(n: i32) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `rc_example` is never used
[INFO] [stdout]    --> session5/refc/src/main.rs:100:4
[INFO] [stdout]     |
[INFO] [stdout] 100 | fn rc_example() {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> session5/refc/src/main.rs:107:12
[INFO] [stdout]     |
[INFO] [stdout] 106 |     impl Droppable {
[INFO] [stdout]     |     -------------- associated function in this implementation
[INFO] [stdout] 107 |         fn new(n: i32) -> Self {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking clap v4.5.37
[INFO] [stderr]     Checking login_manager v0.1.0 (/opt/rustwide/workdir/session1/login_manager)
[INFO] [stderr]    Compiling sqlx-core v0.8.6
[INFO] [stderr]     Checking hyper v1.6.0
[INFO] [stderr]     Checking hyper-util v0.1.16
[INFO] [stderr]    Compiling sqlx-sqlite v0.8.6
[INFO] [stderr]     Checking ravif v0.11.20
[INFO] [stderr]     Checking image v0.25.6
[INFO] [stderr]     Checking axum v0.8.4
[INFO] [stderr]    Compiling sqlx-macros-core v0.8.6
[INFO] [stderr]    Compiling sqlx-macros v0.8.6
[INFO] [stderr]     Checking file_adapt v0.1.0 (/opt/rustwide/workdir/bonus/file_adapt)
[INFO] [stderr]     Checking web_service v0.1.0 (/opt/rustwide/workdir/session4/web_service)
[INFO] [stderr]     Checking tokio-native-tls v0.3.1
[INFO] [stderr]     Checking hyper-tls v0.6.0
[INFO] [stderr]     Checking reqwest v0.12.22
[INFO] [stderr]     Checking rest_client v0.1.0 (/opt/rustwide/workdir/session3/rest_client)
[INFO] [stdout] warning: struct `Weather` is never constructed
[INFO] [stdout]  --> session3/rest_client/src/main.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct Weather {
[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 `CurrentWeather` is never constructed
[INFO] [stdout]   --> session3/rest_client/src/main.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct CurrentWeather {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Weather` is never constructed
[INFO] [stdout]  --> session3/rest_client/src/main.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct Weather {
[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 `CurrentWeather` is never constructed
[INFO] [stdout]   --> session3/rest_client/src/main.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct CurrentWeather {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking sqlx v0.8.6
[INFO] [stderr]     Checking thumbs v0.1.0 (/opt/rustwide/workdir/session4/thumbs)
[INFO] [stderr]     Checking server v0.1.0 (/opt/rustwide/workdir/session6/server)
[INFO] [stderr]     Checking db v0.1.0 (/opt/rustwide/workdir/session4/db)
[INFO] [stdout] warning: unused import: `Row`
[INFO] [stdout]  --> session4/db/src/main.rs:2:21
[INFO] [stdout]   |
[INFO] [stdout] 2 | use sqlx::{FromRow, Row};
[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: `Row`
[INFO] [stdout]  --> session4/db/src/main.rs:2:21
[INFO] [stdout]   |
[INFO] [stdout] 2 | use sqlx::{FromRow, Row};
[INFO] [stdout]   |                     ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `id` and `message` are never read
[INFO] [stdout]  --> session4/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]  --> session4/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]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3m 20s
[INFO] running `Command { std: "docker" "inspect" "e3900189e502c85cc299263aa94ce3019cca6c3b0e9dcb1ece76c096ccb4a7a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e3900189e502c85cc299263aa94ce3019cca6c3b0e9dcb1ece76c096ccb4a7a5", kill_on_drop: false }`
[INFO] [stdout] e3900189e502c85cc299263aa94ce3019cca6c3b0e9dcb1ece76c096ccb4a7a5
