[INFO] cloning repository https://github.com/clvx/ultimate-rust-foundations
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/clvx/ultimate-rust-foundations" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fclvx%2Fultimate-rust-foundations", kill_on_drop: false }`
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[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f5bad8e96126feab0785b7d4bc7f8926be91c823
[INFO] testing clvx/ultimate-rust-foundations against master#c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38 for pr-146098-7
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fclvx%2Fultimate-rust-foundations" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/clvx/ultimate-rust-foundations
[INFO] finished tweaking git repo https://github.com/clvx/ultimate-rust-foundations
[INFO] tweaked toml for git repo https://github.com/clvx/ultimate-rust-foundations written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/clvx/ultimate-rust-foundations on toolchain c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/clvx/ultimate-rust-foundations 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" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] [stderr]    Compiling tprio v0.1.0 (/opt/rustwide/workdir/foundations/session2/tprio)
[INFO] [stdout] warning: static `HIGH_COUNT` is never used
[INFO] [stdout]  --> foundations/session2/tprio/src/main.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | 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]    Compiling clap v4.5.27
[INFO] [stderr]    Compiling db v0.1.0 (/opt/rustwide/workdir/foundations/session4/db)
[INFO] [stderr]    Compiling login_manager v0.1.0 (/opt/rustwide/workdir/foundations/session1/login_manager)
[INFO] [stdout] warning: fields `id` and `message` are never read
[INFO] [stdout]  --> foundations/session4/db/src/main.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | struct Message {
[INFO] [stdout]   |        ------- fields in this struct
[INFO] [stdout] 7 |     id: i64,
[INFO] [stdout]   |     ^^
[INFO] [stdout] 8 |     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]    Compiling pinning v0.1.0 (/opt/rustwide/workdir/foundations/session3/pinning)
[INFO] [stdout] warning: function `one` is never used
[INFO] [stdout]   --> foundations/session3/pinning/src/main.rs:20:10
[INFO] [stdout]    |
[INFO] [stdout] 20 | async fn one() {
[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 `two` is never used
[INFO] [stdout]   --> foundations/session3/pinning/src/main.rs:24:10
[INFO] [stdout]    |
[INFO] [stdout] 24 | async fn two() {
[INFO] [stdout]    |          ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `call_one_of_them` is never used
[INFO] [stdout]   --> foundations/session3/pinning/src/main.rs:28:10
[INFO] [stdout]    |
[INFO] [stdout] 28 | async fn call_one_of_them(n:u32) -> Pin<Box<dyn Future<Output = ()>>> {
[INFO] [stdout]    |          ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling affinity v0.1.0 (/opt/rustwide/workdir/foundations/session2/affinity)
[INFO] [stderr]    Compiling save_bytes v0.1.0 (/opt/rustwide/workdir/foundations/session4/save_bytes)
[INFO] [stderr]    Compiling dashing v0.1.0 (/opt/rustwide/workdir/foundations/session2/dashing)
[INFO] [stderr]    Compiling restclient v0.1.0 (/opt/rustwide/workdir/foundations/session3/restclient)
[INFO] [stdout] warning: fields `latitude`, `longitude`, and `current_weather` are never read
[INFO] [stdout]  --> foundations/session3/restclient/src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Weather {
[INFO] [stdout]   |        ------- fields in this struct
[INFO] [stdout] 6 |     latitude: f64,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 7 |     longitude: f64,
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout] 8 |     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]   --> foundations/session3/restclient/src/main.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct CurrentWeather {
[INFO] [stdout]    |        -------------- fields in this struct
[INFO] [stdout] 13 |     temperature: f64,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 14 |     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] [stderr]    Compiling errors v0.1.0 (/opt/rustwide/workdir/foundations/session3/errors)
[INFO] [stderr]    Compiling login v0.1.0 (/opt/rustwide/workdir/foundations/session1/login)
[INFO] [stderr]    Compiling hello_async v0.1.0 (/opt/rustwide/workdir/foundations/session3/hello_async)
[INFO] [stderr]    Compiling fileio v0.1.0 (/opt/rustwide/workdir/foundations/session3/fileio)
[INFO] [stdout] warning: function `read_lines` is never used
[INFO] [stdout]  --> foundations/session3/fileio/src/main.rs:9:4
[INFO] [stdout]   |
[INFO] [stdout] 9 | 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]   --> foundations/session3/fileio/src/main.rs:40:10
[INFO] [stdout]    |
[INFO] [stdout] 40 | async fn line_count(filename: String) -> io::Result<usize> {
[INFO] [stdout]    |          ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling tcpserver v0.1.0 (/opt/rustwide/workdir/foundations/session3/tcpserver)
[INFO] [stderr]    Compiling tokio_select_broadcast v0.1.0 (/opt/rustwide/workdir/foundations/session3/tokio_select_broadcast)
[INFO] [stderr]    Compiling async_mutex v0.1.0 (/opt/rustwide/workdir/foundations/session3/async_mutex)
[INFO] [stderr]    Compiling collector v0.1.0 (/opt/rustwide/workdir/foundations/session5/collector)
[INFO] [stderr]    Compiling tokio_select v0.1.0 (/opt/rustwide/workdir/foundations/session3/tokio_select)
[INFO] [stderr]    Compiling hello_tokio v0.1.0 (/opt/rustwide/workdir/foundations/session3/hello_tokio)
[INFO] [stderr]    Compiling blocking v0.1.0 (/opt/rustwide/workdir/foundations/session3/blocking)
[INFO] [stderr]    Compiling async_channels v0.1.0 (/opt/rustwide/workdir/foundations/session3/async_channels)
[INFO] [stderr]    Compiling tokio_testing v0.1.0 (/opt/rustwide/workdir/foundations/session3/tokio_testing)
[INFO] [stderr]    Compiling threadpool v0.1.0 (/opt/rustwide/workdir/foundations/session2/threadpool)
[INFO] [stderr]    Compiling rwlocks v0.1.0 (/opt/rustwide/workdir/foundations/session2/rwlocks)
[INFO] [stderr]    Compiling dropping v0.1.0 (/opt/rustwide/workdir/foundations/session4/dropping)
[INFO] [stderr]    Compiling internal_arc_mutex v0.1.0 (/opt/rustwide/workdir/foundations/session4/internal_arc_mutex)
[INFO] [stderr]    Compiling footgun v0.1.0 (/opt/rustwide/workdir/foundations/session2/footgun)
[INFO] [stderr]    Compiling smart_pointer v0.1.0 (/opt/rustwide/workdir/foundations/session4/smart_pointer)
[INFO] [stderr]    Compiling channels v0.1.0 (/opt/rustwide/workdir/foundations/session2/channels)
[INFO] [stderr]    Compiling lifetimes v0.1.0 (/opt/rustwide/workdir/foundations/session4/lifetimes)
[INFO] [stderr]    Compiling hello v0.1.0 (/opt/rustwide/workdir/foundations/session2/hello)
[INFO] [stderr]    Compiling hello_world v0.1.0 (/opt/rustwide/workdir/foundations/session1/hello_world)
[INFO] [stderr]    Compiling deadlocks v0.1.0 (/opt/rustwide/workdir/foundations/session2/deadlocks)
[INFO] [stderr]    Compiling generics v0.1.0 (/opt/rustwide/workdir/foundations/session4/generics_and_iterators)
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> foundations/session4/generics_and_iterators/src/main.rs:32:13
[INFO] [stdout]    |
[INFO] [stdout] 32 |     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] 32 |     fn iter(&self) -> HashMapBucketIter<'_, K, V> {
[INFO] [stdout]    |                                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling parking v0.1.0 (/opt/rustwide/workdir/foundations/session2/parking)
[INFO] [stderr]    Compiling operator_overloading v0.1.0 (/opt/rustwide/workdir/foundations/session4/operator_overloading)
[INFO] [stderr]    Compiling workers v0.1.0 (/opt/rustwide/workdir/foundations/session2/workers)
[INFO] [stderr]    Compiling variables v0.1.0 (/opt/rustwide/workdir/foundations/session1/variables)
[INFO] [stderr]    Compiling scoped_threads v0.1.0 (/opt/rustwide/workdir/foundations/session2/scoped_threads)
[INFO] [stderr]    Compiling external_arc_mutex v0.1.0 (/opt/rustwide/workdir/foundations/session4/external_arc_mutex)
[INFO] [stderr]    Compiling mutexes v0.1.0 (/opt/rustwide/workdir/foundations/session2/mutexes)
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]  --> foundations/session2/mutexes/src/main.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     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] [stderr]    Compiling linked_list v0.1.0 (/opt/rustwide/workdir/foundations/session4/linked_list)
[INFO] [stderr]    Compiling thread_builder v0.1.0 (/opt/rustwide/workdir/foundations/session2/thread_builder)
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> foundations/session4/linked_list/src/main.rs:14:12
[INFO] [stdout]    |
[INFO] [stdout] 14 |     Strong(Rc<Node>), // Strong reference to the next node, which increases the 
[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] 14 -     Strong(Rc<Node>), // Strong reference to the next node, which increases the 
[INFO] [stdout] 14 +     Strong(()), // Strong reference to the next node, which increases the 
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> foundations/session4/linked_list/src/main.rs:16:10
[INFO] [stdout]    |
[INFO] [stdout] 16 |     Weak(Weak<Node>), // Weak reference to the next node, which does not increase the reference
[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] 16 -     Weak(Weak<Node>), // Weak reference to the next node, which does not increase the reference
[INFO] [stdout] 16 +     Weak(()), // Weak reference to the next node, which does not increase the reference
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling atomicrefcount v0.1.0 (/opt/rustwide/workdir/foundations/session4/atomicrefcount)
[INFO] [stderr]    Compiling save_dynamic_bytes v0.1.0 (/opt/rustwide/workdir/foundations/session4/save_dynamic_bytes)
[INFO] [stderr]    Compiling refcount v0.1.0 (/opt/rustwide/workdir/foundations/session4/refcount)
[INFO] [stderr]    Compiling divide_work v0.1.0 (/opt/rustwide/workdir/foundations/session2/divide_work)
[INFO] [stderr]    Compiling file_adapter v0.1.0 (/opt/rustwide/workdir/bonus/file_adapter)
[INFO] [stderr]    Compiling refcell v0.1.0 (/opt/rustwide/workdir/foundations/session4/refcell)
[INFO] [stderr]    Compiling traits v0.1.0 (/opt/rustwide/workdir/foundations/session4/traits)
[INFO] [stdout] warning: unused import: `rc::Rc`
[INFO] [stdout]  --> foundations/session4/traits/src/main.rs:1:23
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{fmt::Debug, rc::Rc};
[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: `animal`
[INFO] [stdout]   --> foundations/session4/traits/src/main.rs:78:9
[INFO] [stdout]    |
[INFO] [stdout] 78 |     let animal = get_animal(); // impl Animal for Cat
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_animal`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `DebuggableClonableAnimal` is never used
[INFO] [stdout]   --> foundations/session4/traits/src/main.rs:31:7
[INFO] [stdout]    |
[INFO] [stdout] 31 | trait DebuggableClonableAnimal: Animal+Debug+Clone {}
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling simple_http_server v0.1.0 (/opt/rustwide/workdir/services/http_server)
[INFO] [stderr]    Compiling collector_server v0.1.0 (/opt/rustwide/workdir/foundations/session5/collector_server)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3m 44s
[INFO] running `Command { std: "docker" "inspect" "aabd5ea310a3613b91a7b4028628f6d2767f95b7ae9764186bf00d5b257947af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aabd5ea310a3613b91a7b4028628f6d2767f95b7ae9764186bf00d5b257947af", kill_on_drop: false }`
[INFO] [stdout] aabd5ea310a3613b91a7b4028628f6d2767f95b7ae9764186bf00d5b257947af
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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_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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8ba57aade44eea4efea1e0e0118f581333b2bc199a2beb3228221c591e3a8718
[INFO] running `Command { std: "docker" "start" "-a" "8ba57aade44eea4efea1e0e0118f581333b2bc199a2beb3228221c591e3a8718", kill_on_drop: false }`
[INFO] [stderr]    Compiling collector_server v0.1.0 (/opt/rustwide/workdir/foundations/session5/collector_server)
[INFO] [stderr]    Compiling file_adapter v0.1.0 (/opt/rustwide/workdir/bonus/file_adapter)
[INFO] [stderr]    Compiling collector v0.1.0 (/opt/rustwide/workdir/foundations/session5/collector)
[INFO] [stderr]    Compiling simple_http_server v0.1.0 (/opt/rustwide/workdir/services/http_server)
[INFO] [stderr]    Compiling pinning v0.1.0 (/opt/rustwide/workdir/foundations/session3/pinning)
[INFO] [stderr]    Compiling tprio v0.1.0 (/opt/rustwide/workdir/foundations/session2/tprio)
[INFO] [stderr]    Compiling dashing v0.1.0 (/opt/rustwide/workdir/foundations/session2/dashing)
[INFO] [stderr]    Compiling save_bytes v0.1.0 (/opt/rustwide/workdir/foundations/session4/save_bytes)
[INFO] [stdout] warning: static `HIGH_COUNT` is never used
[INFO] [stdout]  --> foundations/session2/tprio/src/main.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | 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: function `one` is never used
[INFO] [stdout]   --> foundations/session3/pinning/src/main.rs:20:10
[INFO] [stdout]    |
[INFO] [stdout] 20 | async fn one() {
[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 `two` is never used
[INFO] [stdout]   --> foundations/session3/pinning/src/main.rs:24:10
[INFO] [stdout]    |
[INFO] [stdout] 24 | async fn two() {
[INFO] [stdout]    |          ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `call_one_of_them` is never used
[INFO] [stdout]   --> foundations/session3/pinning/src/main.rs:28:10
[INFO] [stdout]    |
[INFO] [stdout] 28 | async fn call_one_of_them(n:u32) -> Pin<Box<dyn Future<Output = ()>>> {
[INFO] [stdout]    |          ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling login_manager v0.1.0 (/opt/rustwide/workdir/foundations/session1/login_manager)
[INFO] [stderr]    Compiling affinity v0.1.0 (/opt/rustwide/workdir/foundations/session2/affinity)
[INFO] [stderr]    Compiling db v0.1.0 (/opt/rustwide/workdir/foundations/session4/db)
[INFO] [stderr]    Compiling restclient v0.1.0 (/opt/rustwide/workdir/foundations/session3/restclient)
[INFO] [stderr]    Compiling hello_async v0.1.0 (/opt/rustwide/workdir/foundations/session3/hello_async)
[INFO] [stderr]    Compiling errors v0.1.0 (/opt/rustwide/workdir/foundations/session3/errors)
[INFO] [stderr]    Compiling login v0.1.0 (/opt/rustwide/workdir/foundations/session1/login)
[INFO] [stdout] warning: fields `latitude`, `longitude`, and `current_weather` are never read
[INFO] [stdout]  --> foundations/session3/restclient/src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Weather {
[INFO] [stdout]   |        ------- fields in this struct
[INFO] [stdout] 6 |     latitude: f64,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 7 |     longitude: f64,
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout] 8 |     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]   --> foundations/session3/restclient/src/main.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct CurrentWeather {
[INFO] [stdout]    |        -------------- fields in this struct
[INFO] [stdout] 13 |     temperature: f64,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 14 |     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: fields `id` and `message` are never read
[INFO] [stdout]  --> foundations/session4/db/src/main.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | struct Message {
[INFO] [stdout]   |        ------- fields in this struct
[INFO] [stdout] 7 |     id: i64,
[INFO] [stdout]   |     ^^
[INFO] [stdout] 8 |     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]    Compiling shared_data v0.1.0 (/opt/rustwide/workdir/foundations/session5/shared_data)
[INFO] [stderr]    Compiling tcpserver v0.1.0 (/opt/rustwide/workdir/foundations/session3/tcpserver)
[INFO] [stderr]    Compiling fileio v0.1.0 (/opt/rustwide/workdir/foundations/session3/fileio)
[INFO] [stderr]    Compiling authentication v0.1.0 (/opt/rustwide/workdir/foundations/session1/authentication)
[INFO] [stderr]    Compiling tokio_select v0.1.0 (/opt/rustwide/workdir/foundations/session3/tokio_select)
[INFO] [stderr]    Compiling tokio_testing v0.1.0 (/opt/rustwide/workdir/foundations/session3/tokio_testing)
[INFO] [stdout] warning: function `read_lines` is never used
[INFO] [stdout]  --> foundations/session3/fileio/src/main.rs:9:4
[INFO] [stdout]   |
[INFO] [stdout] 9 | 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]   --> foundations/session3/fileio/src/main.rs:40:10
[INFO] [stdout]    |
[INFO] [stdout] 40 | async fn line_count(filename: String) -> io::Result<usize> {
[INFO] [stdout]    |          ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling async_channels v0.1.0 (/opt/rustwide/workdir/foundations/session3/async_channels)
[INFO] [stderr]    Compiling async_mutex v0.1.0 (/opt/rustwide/workdir/foundations/session3/async_mutex)
[INFO] [stderr]    Compiling tokio_select_broadcast v0.1.0 (/opt/rustwide/workdir/foundations/session3/tokio_select_broadcast)
[INFO] [stderr]    Compiling blocking v0.1.0 (/opt/rustwide/workdir/foundations/session3/blocking)
[INFO] [stderr]    Compiling hello_tokio v0.1.0 (/opt/rustwide/workdir/foundations/session3/hello_tokio)
[INFO] [stderr]    Compiling threadpool v0.1.0 (/opt/rustwide/workdir/foundations/session2/threadpool)
[INFO] [stderr]    Compiling rwlocks v0.1.0 (/opt/rustwide/workdir/foundations/session2/rwlocks)
[INFO] [stderr]    Compiling variables v0.1.0 (/opt/rustwide/workdir/foundations/session1/variables)
[INFO] [stderr]    Compiling external_arc_mutex v0.1.0 (/opt/rustwide/workdir/foundations/session4/external_arc_mutex)
[INFO] [stderr]    Compiling atomicrefcount v0.1.0 (/opt/rustwide/workdir/foundations/session4/atomicrefcount)
[INFO] [stderr]    Compiling channels v0.1.0 (/opt/rustwide/workdir/foundations/session2/channels)
[INFO] [stderr]    Compiling linked_list v0.1.0 (/opt/rustwide/workdir/foundations/session4/linked_list)
[INFO] [stderr]    Compiling mutexes v0.1.0 (/opt/rustwide/workdir/foundations/session2/mutexes)
[INFO] [stderr]    Compiling operator_overloading v0.1.0 (/opt/rustwide/workdir/foundations/session4/operator_overloading)
[INFO] [stderr]    Compiling save_dynamic_bytes v0.1.0 (/opt/rustwide/workdir/foundations/session4/save_dynamic_bytes)
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> foundations/session4/linked_list/src/main.rs:14:12
[INFO] [stdout]    |
[INFO] [stdout] 14 |     Strong(Rc<Node>), // Strong reference to the next node, which increases the 
[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] 14 -     Strong(Rc<Node>), // Strong reference to the next node, which increases the 
[INFO] [stdout] 14 +     Strong(()), // Strong reference to the next node, which increases the 
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> foundations/session4/linked_list/src/main.rs:16:10
[INFO] [stdout]    |
[INFO] [stdout] 16 |     Weak(Weak<Node>), // Weak reference to the next node, which does not increase the reference
[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] 16 -     Weak(Weak<Node>), // Weak reference to the next node, which does not increase the reference
[INFO] [stdout] 16 +     Weak(()), // Weak reference to the next node, which does not increase the reference
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling deadlocks v0.1.0 (/opt/rustwide/workdir/foundations/session2/deadlocks)
[INFO] [stderr]    Compiling footgun v0.1.0 (/opt/rustwide/workdir/foundations/session2/footgun)
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]  --> foundations/session2/mutexes/src/main.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     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] [stderr]    Compiling scoped_threads v0.1.0 (/opt/rustwide/workdir/foundations/session2/scoped_threads)
[INFO] [stderr]    Compiling thread_builder v0.1.0 (/opt/rustwide/workdir/foundations/session2/thread_builder)
[INFO] [stderr]    Compiling workers v0.1.0 (/opt/rustwide/workdir/foundations/session2/workers)
[INFO] [stderr]    Compiling generics v0.1.0 (/opt/rustwide/workdir/foundations/session4/generics_and_iterators)
[INFO] [stderr]    Compiling dropping v0.1.0 (/opt/rustwide/workdir/foundations/session4/dropping)
[INFO] [stderr]    Compiling refcell v0.1.0 (/opt/rustwide/workdir/foundations/session4/refcell)
[INFO] [stderr]    Compiling hello_world v0.1.0 (/opt/rustwide/workdir/foundations/session1/hello_world)
[INFO] [stderr]    Compiling refcount v0.1.0 (/opt/rustwide/workdir/foundations/session4/refcount)
[INFO] [stderr]    Compiling hello v0.1.0 (/opt/rustwide/workdir/foundations/session2/hello)
[INFO] [stderr]    Compiling smart_pointer v0.1.0 (/opt/rustwide/workdir/foundations/session4/smart_pointer)
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> foundations/session4/generics_and_iterators/src/main.rs:32:13
[INFO] [stdout]    |
[INFO] [stdout] 32 |     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] 32 |     fn iter(&self) -> HashMapBucketIter<'_, K, V> {
[INFO] [stdout]    |                                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling parking v0.1.0 (/opt/rustwide/workdir/foundations/session2/parking)
[INFO] [stderr]    Compiling traits v0.1.0 (/opt/rustwide/workdir/foundations/session4/traits)
[INFO] [stderr]    Compiling lifetimes v0.1.0 (/opt/rustwide/workdir/foundations/session4/lifetimes)
[INFO] [stderr]    Compiling divide_work v0.1.0 (/opt/rustwide/workdir/foundations/session2/divide_work)
[INFO] [stdout] warning: unused import: `rc::Rc`
[INFO] [stdout]  --> foundations/session4/traits/src/main.rs:1:23
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{fmt::Debug, rc::Rc};
[INFO] [stdout]   |                       ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling internal_arc_mutex v0.1.0 (/opt/rustwide/workdir/foundations/session4/internal_arc_mutex)
[INFO] [stdout] warning: unused variable: `animal`
[INFO] [stdout]   --> foundations/session4/traits/src/main.rs:78:9
[INFO] [stdout]    |
[INFO] [stdout] 78 |     let animal = get_animal(); // impl Animal for Cat
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_animal`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `DebuggableClonableAnimal` is never used
[INFO] [stdout]   --> foundations/session4/traits/src/main.rs:31:7
[INFO] [stdout]    |
[INFO] [stdout] 31 | trait DebuggableClonableAnimal: Animal+Debug+Clone {}
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 9.14s
[INFO] running `Command { std: "docker" "inspect" "8ba57aade44eea4efea1e0e0118f581333b2bc199a2beb3228221c591e3a8718", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8ba57aade44eea4efea1e0e0118f581333b2bc199a2beb3228221c591e3a8718", kill_on_drop: false }`
[INFO] [stdout] 8ba57aade44eea4efea1e0e0118f581333b2bc199a2beb3228221c591e3a8718
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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_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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 77b7a2f18f52af22b9a4ec42d39b1dc20a5f624620b9bfcd16ef76e53a7aedd4
[INFO] running `Command { std: "docker" "start" "-a" "77b7a2f18f52af22b9a4ec42d39b1dc20a5f624620b9bfcd16ef76e53a7aedd4", kill_on_drop: false }`
[INFO] [stderr] warning: function `one` is never used
[INFO] [stderr]   --> foundations/session3/pinning/src/main.rs:20:10
[INFO] [stderr]    |
[INFO] [stderr] 20 | async fn one() {
[INFO] [stderr]    |          ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function `two` is never used
[INFO] [stderr]   --> foundations/session3/pinning/src/main.rs:24:10
[INFO] [stderr]    |
[INFO] [stderr] 24 | async fn two() {
[INFO] [stderr]    |          ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `call_one_of_them` is never used
[INFO] [stderr]   --> foundations/session3/pinning/src/main.rs:28:10
[INFO] [stderr]    |
[INFO] [stderr] 28 | async fn call_one_of_them(n:u32) -> Pin<Box<dyn Future<Output = ()>>> {
[INFO] [stderr]    |          ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: static `HIGH_COUNT` is never used
[INFO] [stderr]  --> foundations/session2/tprio/src/main.rs:6:8
[INFO] [stderr]   |
[INFO] [stderr] 6 | static HIGH_COUNT: AtomicI32 = AtomicI32::new(0);
[INFO] [stderr]   |        ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `pinning` (bin "pinning" test) generated 3 warnings
[INFO] [stderr] warning: `tprio` (bin "tprio" test) generated 1 warning
[INFO] [stderr] warning: fields `id` and `message` are never read
[INFO] [stderr]  --> foundations/session4/db/src/main.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | struct Message {
[INFO] [stderr]   |        ------- fields in this struct
[INFO] [stderr] 7 |     id: i64,
[INFO] [stderr]   |     ^^
[INFO] [stderr] 8 |     message: String,
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `Message` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: fields `latitude`, `longitude`, and `current_weather` are never read
[INFO] [stderr]  --> foundations/session3/restclient/src/main.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | struct Weather {
[INFO] [stderr]   |        ------- fields in this struct
[INFO] [stderr] 6 |     latitude: f64,
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr] 7 |     longitude: f64,
[INFO] [stderr]   |     ^^^^^^^^^
[INFO] [stderr] 8 |     current_weather: CurrentWeather,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `Weather` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: fields `temperature` and `windspeed` are never read
[INFO] [stderr]   --> foundations/session3/restclient/src/main.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 12 | struct CurrentWeather {
[INFO] [stderr]    |        -------------- fields in this struct
[INFO] [stderr] 13 |     temperature: f64,
[INFO] [stderr]    |     ^^^^^^^^^^^
[INFO] [stderr] 14 |     windspeed: f64,
[INFO] [stderr]    |     ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `CurrentWeather` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: `db` (bin "db" test) generated 1 warning
[INFO] [stderr] warning: `restclient` (bin "restclient" test) generated 2 warnings
[INFO] [stderr] warning: function `read_lines` is never used
[INFO] [stderr]  --> foundations/session3/fileio/src/main.rs:9:4
[INFO] [stderr]   |
[INFO] [stderr] 9 | fn read_lines<P>(filename: P) -> io::Result<io::Lines<io::BufReader<File>>>
[INFO] [stderr]   |    ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function `line_count` is never used
[INFO] [stderr]   --> foundations/session3/fileio/src/main.rs:40:10
[INFO] [stderr]    |
[INFO] [stderr] 40 | async fn line_count(filename: String) -> io::Result<usize> {
[INFO] [stderr]    |          ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `fileio` (bin "fileio" test) generated 2 warnings
[INFO] [stderr] warning: unused import: `rc::Rc`
[INFO] [stderr]  --> foundations/session4/traits/src/main.rs:1:23
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::{fmt::Debug, rc::Rc};
[INFO] [stderr]   |                       ^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `animal`
[INFO] [stderr]   --> foundations/session4/traits/src/main.rs:78:9
[INFO] [stderr]    |
[INFO] [stderr] 78 |     let animal = get_animal(); // impl Animal for Cat
[INFO] [stderr]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_animal`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait `DebuggableClonableAnimal` is never used
[INFO] [stderr]   --> foundations/session4/traits/src/main.rs:31:7
[INFO] [stderr]    |
[INFO] [stderr] 31 | trait DebuggableClonableAnimal: Animal+Debug+Clone {}
[INFO] [stderr]    |       ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `traits` (bin "traits" test) generated 3 warnings (run `cargo fix --bin "traits" -p traits --tests` to apply 2 suggestions)
[INFO] [stderr] warning: field `0` is never read
[INFO] [stderr]   --> foundations/session4/linked_list/src/main.rs:14:12
[INFO] [stderr]    |
[INFO] [stderr] 14 |     Strong(Rc<Node>), // Strong reference to the next node, which increases the 
[INFO] [stderr]    |     ------ ^^^^^^^^
[INFO] [stderr]    |     |
[INFO] [stderr]    |     field in this variant
[INFO] [stderr]    |
[INFO] [stderr]    = note: `NextNode` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stderr]    |
[INFO] [stderr] 14 -     Strong(Rc<Node>), // Strong reference to the next node, which increases the 
[INFO] [stderr] 14 +     Strong(()), // Strong reference to the next node, which increases the 
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: field `0` is never read
[INFO] [stderr]   --> foundations/session4/linked_list/src/main.rs:16:10
[INFO] [stderr]    |
[INFO] [stderr] 16 |     Weak(Weak<Node>), // Weak reference to the next node, which does not increase the reference
[INFO] [stderr]    |     ---- ^^^^^^^^^^
[INFO] [stderr]    |     |
[INFO] [stderr]    |     field in this variant
[INFO] [stderr]    |
[INFO] [stderr]    = note: `NextNode` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stderr]    |
[INFO] [stderr] 16 -     Weak(Weak<Node>), // Weak reference to the next node, which does not increase the reference
[INFO] [stderr] 16 +     Weak(()), // Weak reference to the next node, which does not increase the reference
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]   --> foundations/session4/generics_and_iterators/src/main.rs:32:13
[INFO] [stderr]    |
[INFO] [stderr] 32 |     fn iter(&self) -> HashMapBucketIter<K, V> {
[INFO] [stderr]    |             ^^^^^     ^^^^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stderr]    |             |
[INFO] [stderr]    |             the lifetime is elided here
[INFO] [stderr]    |
[INFO] [stderr]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]    |
[INFO] [stderr] 32 |     fn iter(&self) -> HashMapBucketIter<'_, K, V> {
[INFO] [stderr]    |                                         +++
[INFO] [stderr] 
[INFO] [stderr] warning: `linked_list` (bin "linked_list" test) generated 2 warnings
[INFO] [stderr] warning: `generics` (bin "generics" test) generated 1 warning (run `cargo fix --bin "generics" -p generics --tests` to apply 1 suggestion)
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]  --> foundations/session2/mutexes/src/main.rs:8:9
[INFO] [stderr]   |
[INFO] [stderr] 8 |     for i in 0..10 {
[INFO] [stderr]   |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `mutexes` (bin "mutexes" test) generated 1 warning (run `cargo fix --bin "mutexes" -p mutexes --tests` to apply 1 suggestion)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.62s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/affinity-17047b5a1f8eac69)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/async_channels-d5f54b240b1ee94b)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/async_mutex-a2398efa6bbc0acf)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/atomicrefcount-7f80b5796b510aaa)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/authentication-b903c363acb52db5)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test tests::test_greet_user ... ok
[INFO] [stdout] test tests::test_login ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- tests::test_login stdout ----
[INFO] [stdout] 
[INFO] [stdout] thread 'tests::test_login' (21) panicked at foundations/session1/authentication/src/lib.rs:94:48:
[INFO] [stdout] called `Result::unwrap()` on an `Err` value: Os { code: 30, kind: ReadOnlyFilesystem, message: "Read-only file system" }
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x5b4205b1d282 - std::backtrace_rs::backtrace::libunwind::trace::ha50a1f28c7a10cf8
[INFO] [stdout]                                at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stdout]    1:     0x5b4205b1d282 - std::backtrace_rs::backtrace::trace_unsynchronized::h34f8c4ec82a320bc
[INFO] [stdout]                                at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stdout]    2:     0x5b4205b1d282 - std::sys::backtrace::_print_fmt::h2d23e84e13d343bc
[INFO] [stdout]                                at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/std/src/sys/backtrace.rs:66:9
[INFO] [stdout]    3:     0x5b4205b1d282 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::hde21067283f7e82e
[INFO] [stdout]                                at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/std/src/sys/backtrace.rs:39:26
[INFO] [stdout]    4:     0x5b4205b2e5af - core::fmt::rt::Argument::fmt::he65307037dca33c6
[INFO] [stdout]                                at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/core/src/fmt/rt.rs:173:76
[INFO] [stdout]    5:     0x5b4205b2e5af - core::fmt::write::h24186904251c31cb
[INFO] [stdout]                                at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/core/src/fmt/mod.rs:1469:25
[INFO] [stdout]    6:     0x5b4205aead73 - std::io::default_write_fmt::h4e8d11c5c4b9cafe
[INFO] [stdout]                                at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/std/src/io/mod.rs:639:11
[INFO] [stdout]    7:     0x5b4205aead73 - std::io::Write::write_fmt::ha849be0824d095ef
[INFO] [stdout]                                at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/std/src/io/mod.rs:1954:13
[INFO] [stdout]    8:     0x5b4205af69e2 - std::sys::backtrace::BacktraceLock::print::he038489aba5894a6
[INFO] [stdout]                                at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/std/src/sys/backtrace.rs:42:9
[INFO] [stdout]    9:     0x5b4205afb51f - std::panicking::default_hook::{{closure}}::h80a26d916c49679b
[INFO] [stdout]                                at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/std/src/panicking.rs:301:27
[INFO] [stdout]   10:     0x5b4205afb3b1 - std::panicking::default_hook::he2e9efee79b3dce9
[INFO] [stdout]                                at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/std/src/panicking.rs:325:9
[INFO] [stdout]   11:     0x5b4205aae33e - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h202f496763929329
[INFO] [stdout]                                at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/alloc/src/boxed.rs:2099:9
[INFO] [stdout]   12:     0x5b4205aae33e - test::test_main_with_exit_callback::{{closure}}::h805a6913adddaea3
[INFO] [stdout]                                at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/test/src/lib.rs:145:21
[INFO] [stdout]   13:     0x5b4205afbb2f - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h2883c9d2dbd4e81c
[INFO] [stdout]                                at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/alloc/src/boxed.rs:2099:9
[INFO] [stdout]   14:     0x5b4205afbb2f - std::panicking::panic_with_hook::hf5648b7cec6bc73e
[INFO] [stdout]                                at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/std/src/panicking.rs:842:13
[INFO] [stdout]   15:     0x5b4205afb98a - std::panicking::panic_handler::{{closure}}::h1b2ed3864ba94359
[INFO] [stdout]                                at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/std/src/panicking.rs:707:13
[INFO] [stdout]   16:     0x5b4205af6b29 - std::sys::backtrace::__rust_end_short_backtrace::hd0186b2b27f5aaa7
[INFO] [stdout]                                at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/std/src/sys/backtrace.rs:174:18
[INFO] [stdout]   17:     0x5b4205adeb1d - __rustc[f7dae8b92efe1d7a]::rust_begin_unwind
[INFO] [stdout]                                at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/std/src/panicking.rs:698:5
[INFO] [stdout]   18:     0x5b4205b363a0 - core::panicking::panic_fmt::hb5d6b83773432920
[INFO] [stdout]                                at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/core/src/panicking.rs:80:14
[INFO] [stdout]   19:     0x5b4205b35626 - core::result::unwrap_failed::h427ee4a8bb06d8af
[INFO] [stdout]                                at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/core/src/result.rs:1862:5
[INFO] [stdout]   20:     0x5b4205a60f95 - core::result::Result<T,E>::unwrap::h65361bd5c4505592
[INFO] [stdout]                                at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/core/src/result.rs:1233:23
[INFO] [stdout]   21:     0x5b4205a60f95 - authentication::get_users::h497eedb374147c93
[INFO] [stdout]                                at /opt/rustwide/workdir/foundations/session1/authentication/src/lib.rs:94:48
[INFO] [stdout]   22:     0x5b4205a60b11 - authentication::login::hc0c58aee54bf3b97
[INFO] [stdout]                                at /opt/rustwide/workdir/foundations/session1/authentication/src/lib.rs:108:40
[INFO] [stdout]   23:     0x5b4205a576e4 - authentication::tests::test_login::hf29e81a0c3f09f69
[INFO] [stdout]                                at /opt/rustwide/workdir/foundations/session1/authentication/src/lib.rs:164:66
[INFO] [stdout]   24:     0x5b4205a579a7 - authentication::tests::test_login::{{closure}}::h4a00ffdb96cf7974
[INFO] [stdout]                                at /opt/rustwide/workdir/foundations/session1/authentication/src/lib.rs:163:20
[INFO] [stdout]   25:     0x5b4205a58a36 - core::ops::function::FnOnce::call_once::he165b42ee94a9e9b
[INFO] [stdout]                                at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   26:     0x5b4205aae1ab - core::ops::function::FnOnce::call_once::h3a2d82edd1a9b770
[INFO] [stdout]                                at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   27:     0x5b4205aae1ab - test::__rust_begin_short_backtrace::h85d4fe5033219107
[INFO] [stdout]                                at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/test/src/lib.rs:663:18
[INFO] [stdout]   28:     0x5b4205ac219d - test::run_test_in_process::{{closure}}::h67b48a81b9c9d7b6
[INFO] [stdout]                                at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/test/src/lib.rs:686:74
[INFO] [stdout]   29:     0x5b4205ac219d - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h7680585480377cb5
[INFO] [stdout]                                at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/core/src/panic/unwind_safe.rs:274:9
[INFO] [stdout]   30:     0x5b4205ac219d - std::panicking::catch_unwind::do_call::hf71351b2657d4002
[INFO] [stdout]                                at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/std/src/panicking.rs:590:40
[INFO] [stdout]   31:     0x5b4205ac219d - std::panicking::catch_unwind::h7fcb5c0312d9e172
[INFO] [stdout]                                at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/std/src/panicking.rs:553:19
[INFO] [stdout]   32:     0x5b4205ac219d - std::panic::catch_unwind::h5cf3c9bdee894ebe
[INFO] [stdout]                                at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/std/src/panic.rs:359:14
[INFO] [stdout]   33:     0x5b4205ac219d - test::run_test_in_process::h1469cb85193a3a25
[INFO] [stdout]                                at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/test/src/lib.rs:686:27
[INFO] [stdout]   34:     0x5b4205ac219d - test::run_test::{{closure}}::h59d45b3cd6453d69
[INFO] [stdout]                                at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/test/src/lib.rs:607:43
[INFO] [stdout]   35:     0x5b4205a9b6e4 - test::run_test::{{closure}}::h9baa0c3d443f28c9
[INFO] [stdout]                                at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/test/src/lib.rs:637:41
[INFO] [stdout]   36:     0x5b4205a9b6e4 - std::sys::backtrace::__rust_begin_short_backtrace::h97ea8cee4828663e
[INFO] [stdout]                                at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/std/src/sys/backtrace.rs:158:18
[INFO] [stdout]   37:     0x5b4205a9ef3a - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::h5d7539d5f78cee61
[INFO] [stdout]                                at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/std/src/thread/mod.rs:562:17
[INFO] [stdout]   38:     0x5b4205a9ef3a - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::he4c551e23c5e9b22
[INFO] [stdout]                                at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/core/src/panic/unwind_safe.rs:274:9
[INFO] [stdout]   39:     0x5b4205a9ef3a - std::panicking::catch_unwind::do_call::h522b41a6c157aaba
[INFO] [stdout]                                at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/std/src/panicking.rs:590:40
[INFO] [stdout]   40:     0x5b4205a9ef3a - std::panicking::catch_unwind::h0efbf72006b8e365
[INFO] [stdout]                                at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/std/src/panicking.rs:553:19
[INFO] [stdout]   41:     0x5b4205a9ef3a - std::panic::catch_unwind::h3b081041e6c97066
[INFO] [stdout]                                at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/std/src/panic.rs:359:14
[INFO] [stdout]   42:     0x5b4205a9ef3a - std::thread::Builder::spawn_unchecked_::{{closure}}::ha751309815d5d8cf
[INFO] [stdout]                                at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/std/src/thread/mod.rs:560:30
[INFO] [stdout]   43:     0x5b4205a9ef3a - core::ops::function::FnOnce::call_once{{vtable.shim}}::h2084b887a5fe25a7
[INFO] [stdout]                                at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   44:     0x5b4205af1f1f - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h3adbd6ccf5f737af
[INFO] [stdout]                                at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/alloc/src/boxed.rs:2085:9
[INFO] [stdout]   45:     0x5b4205af1f1f - std::sys::thread::unix::Thread::new::thread_start::hb3dc6483caa1b987
[INFO] [stdout]                                at /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/std/src/sys/thread/unix.rs:124:17
[INFO] [stdout]   46:     0x7ad08fdc2aa4 - <unknown>
[INFO] [stdout]   47:     0x7ad08fe4fa64 - clone
[INFO] [stdout]   48:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     tests::test_login
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 1 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.04s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass `-p authentication --lib`
[INFO] running `Command { std: "docker" "inspect" "77b7a2f18f52af22b9a4ec42d39b1dc20a5f624620b9bfcd16ef76e53a7aedd4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "77b7a2f18f52af22b9a4ec42d39b1dc20a5f624620b9bfcd16ef76e53a7aedd4", kill_on_drop: false }`
[INFO] [stdout] 77b7a2f18f52af22b9a4ec42d39b1dc20a5f624620b9bfcd16ef76e53a7aedd4
