[INFO] fetching crate engine_io_server 0.1.0...
[INFO] testing engine_io_server-0.1.0 against beta-2021-08-01 for beta-1.55-1
[INFO] extracting crate engine_io_server 0.1.0 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate engine_io_server 0.1.0 on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate engine_io_server 0.1.0
[INFO] finished tweaking crates.io crate engine_io_server 0.1.0
[INFO] tweaked toml for crates.io crate engine_io_server 0.1.0 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cd87cbf1418bd11d09fe18e4511adfe2729a435062aff2582a5fdd88255f5da6
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "cd87cbf1418bd11d09fe18e4511adfe2729a435062aff2582a5fdd88255f5da6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cd87cbf1418bd11d09fe18e4511adfe2729a435062aff2582a5fdd88255f5da6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cd87cbf1418bd11d09fe18e4511adfe2729a435062aff2582a5fdd88255f5da6", kill_on_drop: false }`
[INFO] [stdout] cd87cbf1418bd11d09fe18e4511adfe2729a435062aff2582a5fdd88255f5da6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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=warn" "-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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 66aa03ea70620de933ec8e99ebc0d3eb71c64c4efb88f036d40f2604809ce855
[INFO] running `Command { std: "docker" "start" "-a" "66aa03ea70620de933ec8e99ebc0d3eb71c64c4efb88f036d40f2604809ce855", kill_on_drop: false }`
[INFO] [stderr]    Compiling strum v0.18.0
[INFO] [stderr]    Compiling tokio v0.2.25
[INFO] [stderr]    Compiling serde_derive v1.0.127
[INFO] [stderr]    Compiling async-trait v0.1.51
[INFO] [stderr]    Compiling uuid v0.8.2
[INFO] [stderr]    Compiling strum_macros v0.18.0
[INFO] [stderr]    Compiling futures-util v0.3.16
[INFO] [stderr]    Compiling engine_io_parser v0.2.0
[INFO] [stderr]    Compiling futures-executor v0.3.16
[INFO] [stderr]    Compiling futures v0.3.16
[INFO] [stderr]    Compiling serde v1.0.127
[INFO] [stderr]    Compiling serde_json v1.0.66
[INFO] [stderr]    Compiling engine_io_server v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `reason`
[INFO] [stdout]    --> src/socket.rs:363:34
[INFO] [stdout]     |
[INFO] [stdout] 363 |     async fn on_close(&mut self, reason: SocketError, description: &str) {
[INFO] [stdout]     |                                  ^^^^^^ help: if this is intentional, prefix it with an underscore: `_reason`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `description`
[INFO] [stdout]    --> src/socket.rs:363:55
[INFO] [stdout]     |
[INFO] [stdout] 363 |     async fn on_close(&mut self, reason: SocketError, description: &str) {
[INFO] [stdout]     |                                                       ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_description`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/socket.rs:55:13
[INFO] [stdout]    |
[INFO] [stdout] 55 |         let mut holder = TransportHolder {
[INFO] [stdout]    |             ----^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `remote_address`
[INFO] [stdout]   --> src/socket.rs:33:5
[INFO] [stdout]    |
[INFO] [stdout] 33 |     remote_address: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `transport_event_sender`
[INFO] [stdout]   --> src/socket.rs:45:5
[INFO] [stdout]    |
[INFO] [stdout] 45 |     transport_event_sender: mpsc::Sender<TransportEvent>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/socket.rs:172:9
[INFO] [stdout]     |
[INFO] [stdout] 172 | /         self.event_sender
[INFO] [stdout] 173 | |             .send(SocketEvent::Open {
[INFO] [stdout] 174 | |                 socket_id: self.id.clone(),
[INFO] [stdout] 175 | |             })
[INFO] [stdout] 176 | |             .await;
[INFO] [stdout]     | |___________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `TransportImpl::close` that must be used
[INFO] [stdout]    --> src/socket.rs:187:17
[INFO] [stdout]     |
[INFO] [stdout] 187 |                 self.transport_holder.transport.close();
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/socket.rs:284:13
[INFO] [stdout]     |
[INFO] [stdout] 284 | /             self.event_sender
[INFO] [stdout] 285 | |                 .send(SocketEvent::Flush {
[INFO] [stdout] 286 | |                     socket_id: id.clone(),
[INFO] [stdout] 287 | |                 })
[INFO] [stdout] 288 | |                 .await;
[INFO] [stdout]     | |_______________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 21.22s
[INFO] running `Command { std: "docker" "inspect" "66aa03ea70620de933ec8e99ebc0d3eb71c64c4efb88f036d40f2604809ce855", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "66aa03ea70620de933ec8e99ebc0d3eb71c64c4efb88f036d40f2604809ce855", kill_on_drop: false }`
[INFO] [stdout] 66aa03ea70620de933ec8e99ebc0d3eb71c64c4efb88f036d40f2604809ce855
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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=warn" "-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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b28478721b10d8b1a588b6a73363c314bbd60cec4b1c1f53d1b64597962788ad
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "b28478721b10d8b1a588b6a73363c314bbd60cec4b1c1f53d1b64597962788ad", kill_on_drop: false }`
[INFO] [stderr]    Compiling engine_io_server v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `reason`
[INFO] [stdout]    --> src/socket.rs:363:34
[INFO] [stdout]     |
[INFO] [stdout] 363 |     async fn on_close(&mut self, reason: SocketError, description: &str) {
[INFO] [stdout]     |                                  ^^^^^^ help: if this is intentional, prefix it with an underscore: `_reason`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `description`
[INFO] [stdout]    --> src/socket.rs:363:55
[INFO] [stdout]     |
[INFO] [stdout] 363 |     async fn on_close(&mut self, reason: SocketError, description: &str) {
[INFO] [stdout]     |                                                       ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_description`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/socket.rs:55:13
[INFO] [stdout]    |
[INFO] [stdout] 55 |         let mut holder = TransportHolder {
[INFO] [stdout]    |             ----^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `remote_address`
[INFO] [stdout]   --> src/socket.rs:33:5
[INFO] [stdout]    |
[INFO] [stdout] 33 |     remote_address: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `transport_event_sender`
[INFO] [stdout]   --> src/socket.rs:45:5
[INFO] [stdout]    |
[INFO] [stdout] 45 |     transport_event_sender: mpsc::Sender<TransportEvent>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/socket.rs:172:9
[INFO] [stdout]     |
[INFO] [stdout] 172 | /         self.event_sender
[INFO] [stdout] 173 | |             .send(SocketEvent::Open {
[INFO] [stdout] 174 | |                 socket_id: self.id.clone(),
[INFO] [stdout] 175 | |             })
[INFO] [stdout] 176 | |             .await;
[INFO] [stdout]     | |___________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `TransportImpl::close` that must be used
[INFO] [stdout]    --> src/socket.rs:187:17
[INFO] [stdout]     |
[INFO] [stdout] 187 |                 self.transport_holder.transport.close();
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/socket.rs:284:13
[INFO] [stdout]     |
[INFO] [stdout] 284 | /             self.event_sender
[INFO] [stdout] 285 | |                 .send(SocketEvent::Flush {
[INFO] [stdout] 286 | |                     socket_id: id.clone(),
[INFO] [stdout] 287 | |                 })
[INFO] [stdout] 288 | |                 .await;
[INFO] [stdout]     | |_______________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `reason`
[INFO] [stdout]    --> src/socket.rs:363:34
[INFO] [stdout]     |
[INFO] [stdout] 363 |     async fn on_close(&mut self, reason: SocketError, description: &str) {
[INFO] [stdout]     |                                  ^^^^^^ help: if this is intentional, prefix it with an underscore: `_reason`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `description`
[INFO] [stdout]    --> src/socket.rs:363:55
[INFO] [stdout]     |
[INFO] [stdout] 363 |     async fn on_close(&mut self, reason: SocketError, description: &str) {
[INFO] [stdout]     |                                                       ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_description`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/socket.rs:55:13
[INFO] [stdout]    |
[INFO] [stdout] 55 |         let mut holder = TransportHolder {
[INFO] [stdout]    |             ----^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `remote_address`
[INFO] [stdout]   --> src/socket.rs:33:5
[INFO] [stdout]    |
[INFO] [stdout] 33 |     remote_address: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `transport_event_sender`
[INFO] [stdout]   --> src/socket.rs:45:5
[INFO] [stdout]    |
[INFO] [stdout] 45 |     transport_event_sender: mpsc::Sender<TransportEvent>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/socket.rs:172:9
[INFO] [stdout]     |
[INFO] [stdout] 172 | /         self.event_sender
[INFO] [stdout] 173 | |             .send(SocketEvent::Open {
[INFO] [stdout] 174 | |                 socket_id: self.id.clone(),
[INFO] [stdout] 175 | |             })
[INFO] [stdout] 176 | |             .await;
[INFO] [stdout]     | |___________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `TransportImpl::close` that must be used
[INFO] [stdout]    --> src/socket.rs:187:17
[INFO] [stdout]     |
[INFO] [stdout] 187 |                 self.transport_holder.transport.close();
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/socket.rs:284:13
[INFO] [stdout]     |
[INFO] [stdout] 284 | /             self.event_sender
[INFO] [stdout] 285 | |                 .send(SocketEvent::Flush {
[INFO] [stdout] 286 | |                     socket_id: id.clone(),
[INFO] [stdout] 287 | |                 })
[INFO] [stdout] 288 | |                 .await;
[INFO] [stdout]     | |_______________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.37s
[INFO] running `Command { std: "docker" "inspect" "b28478721b10d8b1a588b6a73363c314bbd60cec4b1c1f53d1b64597962788ad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b28478721b10d8b1a588b6a73363c314bbd60cec4b1c1f53d1b64597962788ad", kill_on_drop: false }`
[INFO] [stdout] b28478721b10d8b1a588b6a73363c314bbd60cec4b1c1f53d1b64597962788ad
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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=warn" "-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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 3be0228c9cc38d81c816370ba6a1338b1bd06365ba101906ebc1f0dfa7bc691d
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "3be0228c9cc38d81c816370ba6a1338b1bd06365ba101906ebc1f0dfa7bc691d", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stderr] warning: unused variable: `reason`
[INFO] [stderr]    --> src/socket.rs:363:34
[INFO] [stderr]     |
[INFO] [stderr] 363 |     async fn on_close(&mut self, reason: SocketError, description: &str) {
[INFO] [stderr]     |                                  ^^^^^^ help: if this is intentional, prefix it with an underscore: `_reason`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `description`
[INFO] [stderr]    --> src/socket.rs:363:55
[INFO] [stderr]     |
[INFO] [stderr] 363 |     async fn on_close(&mut self, reason: SocketError, description: &str) {
[INFO] [stderr]     |                                                       ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_description`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/socket.rs:55:13
[INFO] [stderr]    |
[INFO] [stderr] 55 |         let mut holder = TransportHolder {
[INFO] [stderr]    |             ----^^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `remote_address`
[INFO] [stderr]   --> src/socket.rs:33:5
[INFO] [stderr]    |
[INFO] [stderr] 33 |     remote_address: String,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `transport_event_sender`
[INFO] [stderr]   --> src/socket.rs:45:5
[INFO] [stderr]    |
[INFO] [stderr] 45 |     transport_event_sender: mpsc::Sender<TransportEvent>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/socket.rs:172:9
[INFO] [stderr]     |
[INFO] [stderr] 172 | /         self.event_sender
[INFO] [stderr] 173 | |             .send(SocketEvent::Open {
[INFO] [stderr] 174 | |                 socket_id: self.id.clone(),
[INFO] [stderr] 175 | |             })
[INFO] [stderr] 176 | |             .await;
[INFO] [stderr]     | |___________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `TransportImpl::close` that must be used
[INFO] [stderr]    --> src/socket.rs:187:17
[INFO] [stderr]     |
[INFO] [stderr] 187 |                 self.transport_holder.transport.close();
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/socket.rs:284:13
[INFO] [stderr]     |
[INFO] [stderr] 284 | /             self.event_sender
[INFO] [stderr] 285 | |                 .send(SocketEvent::Flush {
[INFO] [stderr] 286 | |                     socket_id: id.clone(),
[INFO] [stderr] 287 | |                 })
[INFO] [stderr] 288 | |                 .await;
[INFO] [stderr]     | |_______________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: `engine_io_server` (lib) generated 8 warnings
[INFO] [stderr] warning: `engine_io_server` (lib test) generated 8 warnings (8 duplicates)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/engine_io_server-fd5a0ddb70690b4b)
[INFO] [stdout] test tests::it_works ... ok
[INFO] [stderr]    Doc-tests engine_io_server
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[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] running `Command { std: "docker" "inspect" "3be0228c9cc38d81c816370ba6a1338b1bd06365ba101906ebc1f0dfa7bc691d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3be0228c9cc38d81c816370ba6a1338b1bd06365ba101906ebc1f0dfa7bc691d", kill_on_drop: false }`
[INFO] [stdout] 3be0228c9cc38d81c816370ba6a1338b1bd06365ba101906ebc1f0dfa7bc691d
