[INFO] cloning repository https://github.com/AlexsJones/tackboard
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/AlexsJones/tackboard" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAlexsJones%2Ftackboard", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAlexsJones%2Ftackboard'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c46beadaa9c78de9360fec9fc93a22ea929b07bb
[INFO] checking AlexsJones/tackboard against master#ff647322379c48947c196639599067665ff9eb88 for pr-151539-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAlexsJones%2Ftackboard" "/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/AlexsJones/tackboard
[INFO] finished tweaking git repo https://github.com/AlexsJones/tackboard
[INFO] tweaked toml for git repo https://github.com/AlexsJones/tackboard written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/AlexsJones/tackboard on toolchain ff647322379c48947c196639599067665ff9eb88
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ff647322379c48947c196639599067665ff9eb88" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/AlexsJones/tackboard 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" "+ff647322379c48947c196639599067665ff9eb88" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2024 which implies `resolver = "3"`
[INFO] [stderr]   |
[INFO] [stderr]   = note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr]   = note: to use the edition 2024 resolver, specify `workspace.resolver = "3"` in the workspace root's manifest
[INFO] [stderr]   = note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded uuid v1.17.0
[INFO] [stderr]   Downloaded io-uring v0.7.8
[INFO] [stderr]   Downloaded tokio v1.46.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:3a6becf2bc8dde7f3fa57ede90e4f284e72d296796fc446bbb1e2c7cc0530151" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 9f65b2750f4e79b25568fa6591ae715bc8c28ae3d38e96977ce4845cbf68b0fb
[INFO] running `Command { std: "docker" "start" "9f65b2750f4e79b25568fa6591ae715bc8c28ae3d38e96977ce4845cbf68b0fb", 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" "9f65b2750f4e79b25568fa6591ae715bc8c28ae3d38e96977ce4845cbf68b0fb" "/opt/rustwide/cargo-home/bin/cargo" "+ff647322379c48947c196639599067665ff9eb88" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9f65b2750f4e79b25568fa6591ae715bc8c28ae3d38e96977ce4845cbf68b0fb", 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" "9f65b2750f4e79b25568fa6591ae715bc8c28ae3d38e96977ce4845cbf68b0fb" "/opt/rustwide/cargo-home/bin/cargo" "+ff647322379c48947c196639599067665ff9eb88" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2024 which implies `resolver = "3"`
[INFO] [stderr]   |
[INFO] [stderr]   = note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr]   = note: to use the edition 2024 resolver, specify `workspace.resolver = "3"` in the workspace root's manifest
[INFO] [stderr]   = note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] [stderr]    Compiling proc-macro2 v1.0.95
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[INFO] [stderr]     Checking tackboardlib v0.1.0 (/opt/rustwide/workdir/tackboardlib)
[INFO] [stdout] warning: unused import: `Topic`
[INFO] [stdout]  --> tackboardlib/src/connection_manager/mod.rs:4:51
[INFO] [stdout]   |
[INFO] [stdout] 4 | use crate::types::{ClientRequest, ServerResponse, Topic};
[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: `debug`
[INFO] [stdout]  --> tackboardlib/src/connection_manager/mod.rs:7:11
[INFO] [stdout]   |
[INFO] [stdout] 7 | use log::{debug, error};
[INFO] [stdout]   |           ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the `#![crate_name]` attribute can only be used at the crate root
[INFO] [stdout]  --> tackboardlib/src/connection_manager/mod.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![crate_name = "tackboardlib"]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: the crate root is at `tackboardlib/src/lib.rs`
[INFO] [stdout]   = note: `#[warn(unused_attributes)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Topic`
[INFO] [stdout]  --> tackboardlib/src/connection_manager/mod.rs:4:51
[INFO] [stdout]   |
[INFO] [stdout] 4 | use crate::types::{ClientRequest, ServerResponse, Topic};
[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: `debug`
[INFO] [stdout]  --> tackboardlib/src/connection_manager/mod.rs:7:11
[INFO] [stdout]   |
[INFO] [stdout] 7 | use log::{debug, error};
[INFO] [stdout]   |           ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the `#![crate_name]` attribute can only be used at the crate root
[INFO] [stdout]  --> tackboardlib/src/connection_manager/mod.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![crate_name = "tackboardlib"]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: the crate root is at `tackboardlib/src/lib.rs`
[INFO] [stdout]   = note: `#[warn(unused_attributes)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `path` is never read
[INFO] [stdout]    --> tackboardlib/src/connection_manager/mod.rs:141:5
[INFO] [stdout]     |
[INFO] [stdout] 140 | pub struct ConnectionManager {
[INFO] [stdout]     |            ----------------- field in this struct
[INFO] [stdout] 141 |     path: String,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `ConnectionManager` has a derived impl for the trait `Clone`, 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: use of `async fn` in public traits is discouraged as auto trait bounds cannot be specified
[INFO] [stdout]   --> tackboardlib/src/connection_manager/mod.rs:36:5
[INFO] [stdout]    |
[INFO] [stdout] 36 |     async fn send_sync(&self, request: ClientRequest) -> Result<ServerResponse, TackboardError>;
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: you can suppress this lint if you plan to use the trait only in your own code, or do not care about auto traits like `Send` on the `Future`
[INFO] [stdout]    = note: `#[warn(async_fn_in_trait)]` on by default
[INFO] [stdout] help: you can alternatively desugar to a normal `fn` that returns `impl Future` and add any desired bounds such as `Send`, but these cannot be relaxed without a breaking API change
[INFO] [stdout]    |
[INFO] [stdout] 36 -     async fn send_sync(&self, request: ClientRequest) -> Result<ServerResponse, TackboardError>;
[INFO] [stdout] 36 +     fn send_sync(&self, request: ClientRequest) -> impl std::future::Future<Output = Result<ServerResponse, TackboardError>> + Send;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of `async fn` in public traits is discouraged as auto trait bounds cannot be specified
[INFO] [stdout]   --> tackboardlib/src/connection_manager/mod.rs:57:5
[INFO] [stdout]    |
[INFO] [stdout] 57 |     async fn send_async<F, Fut>(&self, request: ClientRequest, callback: F)
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: you can suppress this lint if you plan to use the trait only in your own code, or do not care about auto traits like `Send` on the `Future`
[INFO] [stdout] help: you can alternatively desugar to a normal `fn` that returns `impl Future` and add any desired bounds such as `Send`, but these cannot be relaxed without a breaking API change
[INFO] [stdout]    |
[INFO] [stdout] 57 -     async fn send_async<F, Fut>(&self, request: ClientRequest, callback: F)
[INFO] [stdout] 57 +     fn send_async<F, Fut>(&self, request: ClientRequest, callback: F) -> impl std::future::Future<Output = ()> + Send
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of `async fn` in public traits is discouraged as auto trait bounds cannot be specified
[INFO] [stdout]   --> tackboardlib/src/connection_manager/mod.rs:79:5
[INFO] [stdout]    |
[INFO] [stdout] 79 |     async fn accept_connections<F, Fut>(&mut self, callback: F) -> Result<(), TackboardError>
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: you can suppress this lint if you plan to use the trait only in your own code, or do not care about auto traits like `Send` on the `Future`
[INFO] [stdout] help: you can alternatively desugar to a normal `fn` that returns `impl Future` and add any desired bounds such as `Send`, but these cannot be relaxed without a breaking API change
[INFO] [stdout]    |
[INFO] [stdout] 79 -     async fn accept_connections<F, Fut>(&mut self, callback: F) -> Result<(), TackboardError>
[INFO] [stdout] 79 +     fn accept_connections<F, Fut>(&mut self, callback: F) -> impl std::future::Future<Output = Result<(), TackboardError>> + Send
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of `async fn` in public traits is discouraged as auto trait bounds cannot be specified
[INFO] [stdout]    --> tackboardlib/src/connection_manager/mod.rs:99:5
[INFO] [stdout]     |
[INFO] [stdout]  99 |     async fn get_connected_clients(
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: you can suppress this lint if you plan to use the trait only in your own code, or do not care about auto traits like `Send` on the `Future`
[INFO] [stdout] help: you can alternatively desugar to a normal `fn` that returns `impl Future` and add any desired bounds such as `Send`, but these cannot be relaxed without a breaking API change
[INFO] [stdout]     |
[INFO] [stdout]  99 ~     fn get_connected_clients(
[INFO] [stdout] 100 |         &self,
[INFO] [stdout] 101 ~     ) -> impl std::future::Future<Output = Arc<Mutex<HashMap<String, Arc<Mutex<SplitSink<InConnection, ServerResponse>>>>>>> + Send;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking tackboardctl v0.1.0 (/opt/rustwide/workdir/tackboardctl)
[INFO] [stderr]     Checking tackboardsrv v0.1.0 (/opt/rustwide/workdir/tackboardsrv)
[INFO] [stdout] warning: unused import: `futures::SinkExt`
[INFO] [stdout]  --> tackboardctl/src/main.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use futures::SinkExt;
[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: `futures::SinkExt`
[INFO] [stdout]  --> tackboardctl/src/main.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use futures::SinkExt;
[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: `topic_id`
[INFO] [stdout]   --> tackboardctl/src/main.rs:80:61
[INFO] [stdout]    |
[INFO] [stdout] 80 |                         ServerResponse::TopicListenUpdate { topic_id, messages } => {
[INFO] [stdout]    |                                                             ^^^^^^^^ help: try ignoring the field: `topic_id: _`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `topic_id`
[INFO] [stdout]   --> tackboardctl/src/main.rs:69:13
[INFO] [stdout]    |
[INFO] [stdout] 69 |         let topic_id = "topic-1".to_string();
[INFO] [stdout]    |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_topic_id`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `response`
[INFO] [stdout]   --> tackboardsrv/src/main.rs:59:41
[INFO] [stdout]    |
[INFO] [stdout] 59 | ...                   let response =
[INFO] [stdout]    |                           ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_response`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `result`
[INFO] [stdout]   --> tackboardsrv/src/main.rs:38:13
[INFO] [stdout]    |
[INFO] [stdout] 38 |         let result = connection_manager.accept_connections({
[INFO] [stdout]    |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_result`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `topic_id`
[INFO] [stdout]   --> tackboardctl/src/main.rs:80:61
[INFO] [stdout]    |
[INFO] [stdout] 80 |                         ServerResponse::TopicListenUpdate { topic_id, messages } => {
[INFO] [stdout]    |                                                             ^^^^^^^^ help: try ignoring the field: `topic_id: _`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `topic_id`
[INFO] [stdout]   --> tackboardctl/src/main.rs:69:13
[INFO] [stdout]    |
[INFO] [stdout] 69 |         let topic_id = "topic-1".to_string();
[INFO] [stdout]    |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_topic_id`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `path` is never read
[INFO] [stdout]    --> tackboardlib/src/connection_manager/mod.rs:141:5
[INFO] [stdout]     |
[INFO] [stdout] 140 | pub struct ConnectionManager {
[INFO] [stdout]     |            ----------------- field in this struct
[INFO] [stdout] 141 |     path: String,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `ConnectionManager` has a derived impl for the trait `Clone`, 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: use of `async fn` in public traits is discouraged as auto trait bounds cannot be specified
[INFO] [stdout]   --> tackboardlib/src/connection_manager/mod.rs:36:5
[INFO] [stdout]    |
[INFO] [stdout] 36 |     async fn send_sync(&self, request: ClientRequest) -> Result<ServerResponse, TackboardError>;
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: you can suppress this lint if you plan to use the trait only in your own code, or do not care about auto traits like `Send` on the `Future`
[INFO] [stdout]    = note: `#[warn(async_fn_in_trait)]` on by default
[INFO] [stdout] help: you can alternatively desugar to a normal `fn` that returns `impl Future` and add any desired bounds such as `Send`, but these cannot be relaxed without a breaking API change
[INFO] [stdout]    |
[INFO] [stdout] 36 -     async fn send_sync(&self, request: ClientRequest) -> Result<ServerResponse, TackboardError>;
[INFO] [stdout] 36 +     fn send_sync(&self, request: ClientRequest) -> impl std::future::Future<Output = Result<ServerResponse, TackboardError>> + Send;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of `async fn` in public traits is discouraged as auto trait bounds cannot be specified
[INFO] [stdout]   --> tackboardlib/src/connection_manager/mod.rs:57:5
[INFO] [stdout]    |
[INFO] [stdout] 57 |     async fn send_async<F, Fut>(&self, request: ClientRequest, callback: F)
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: you can suppress this lint if you plan to use the trait only in your own code, or do not care about auto traits like `Send` on the `Future`
[INFO] [stdout] help: you can alternatively desugar to a normal `fn` that returns `impl Future` and add any desired bounds such as `Send`, but these cannot be relaxed without a breaking API change
[INFO] [stdout]    |
[INFO] [stdout] 57 -     async fn send_async<F, Fut>(&self, request: ClientRequest, callback: F)
[INFO] [stdout] 57 +     fn send_async<F, Fut>(&self, request: ClientRequest, callback: F) -> impl std::future::Future<Output = ()> + Send
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of `async fn` in public traits is discouraged as auto trait bounds cannot be specified
[INFO] [stdout]   --> tackboardlib/src/connection_manager/mod.rs:79:5
[INFO] [stdout]    |
[INFO] [stdout] 79 |     async fn accept_connections<F, Fut>(&mut self, callback: F) -> Result<(), TackboardError>
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: you can suppress this lint if you plan to use the trait only in your own code, or do not care about auto traits like `Send` on the `Future`
[INFO] [stdout] help: you can alternatively desugar to a normal `fn` that returns `impl Future` and add any desired bounds such as `Send`, but these cannot be relaxed without a breaking API change
[INFO] [stdout]    |
[INFO] [stdout] 79 -     async fn accept_connections<F, Fut>(&mut self, callback: F) -> Result<(), TackboardError>
[INFO] [stdout] 79 +     fn accept_connections<F, Fut>(&mut self, callback: F) -> impl std::future::Future<Output = Result<(), TackboardError>> + Send
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of `async fn` in public traits is discouraged as auto trait bounds cannot be specified
[INFO] [stdout]    --> tackboardlib/src/connection_manager/mod.rs:99:5
[INFO] [stdout]     |
[INFO] [stdout]  99 |     async fn get_connected_clients(
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: you can suppress this lint if you plan to use the trait only in your own code, or do not care about auto traits like `Send` on the `Future`
[INFO] [stdout] help: you can alternatively desugar to a normal `fn` that returns `impl Future` and add any desired bounds such as `Send`, but these cannot be relaxed without a breaking API change
[INFO] [stdout]     |
[INFO] [stdout]  99 ~     fn get_connected_clients(
[INFO] [stdout] 100 |         &self,
[INFO] [stdout] 101 ~     ) -> impl std::future::Future<Output = Arc<Mutex<HashMap<String, Arc<Mutex<SplitSink<InConnection, ServerResponse>>>>>>> + Send;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `response`
[INFO] [stdout]   --> tackboardsrv/src/main.rs:59:41
[INFO] [stdout]    |
[INFO] [stdout] 59 | ...                   let response =
[INFO] [stdout]    |                           ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_response`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `result`
[INFO] [stdout]   --> tackboardsrv/src/main.rs:38:13
[INFO] [stdout]    |
[INFO] [stdout] 38 |         let result = connection_manager.accept_connections({
[INFO] [stdout]    |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_result`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 24.44s
[INFO] running `Command { std: "docker" "inspect" "9f65b2750f4e79b25568fa6591ae715bc8c28ae3d38e96977ce4845cbf68b0fb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9f65b2750f4e79b25568fa6591ae715bc8c28ae3d38e96977ce4845cbf68b0fb", kill_on_drop: false }`
[INFO] [stdout] 9f65b2750f4e79b25568fa6591ae715bc8c28ae3d38e96977ce4845cbf68b0fb
