[INFO] cloning repository https://github.com/wildonion/redis4
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/wildonion/redis4" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwildonion%2Fredis4", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwildonion%2Fredis4'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bbb1391d2efc7d1cc148dfe6d2e261e2de683909
[INFO] checking wildonion/redis4 against 1.95.0 for pr-155915
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwildonion%2Fredis4" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/wildonion/redis4
[INFO] finished tweaking git repo https://github.com/wildonion/redis4
[INFO] tweaked toml for git repo https://github.com/wildonion/redis4 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/wildonion/redis4 on toolchain 1.95.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/wildonion/redis4 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" "+1.95.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded quote v1.0.28
[INFO] [stderr]   Downloaded async-trait v0.1.68
[INFO] [stderr]   Downloaded log v0.4.18
[INFO] [stderr]   Downloaded proc-macro2 v1.0.59
[INFO] [stderr]   Downloaded unicode-ident v1.0.9
[INFO] [stderr]   Downloaded crc16 v0.4.0
[INFO] [stderr]   Downloaded redis v0.23.0
[INFO] [stderr]   Downloaded uuid v1.3.4
[INFO] [stderr]   Downloaded syn v2.0.18
[INFO] [stderr]   Downloaded rustix v0.37.20
[INFO] [stderr]   Downloaded regex-syntax v0.7.2
[INFO] [stderr]   Downloaded regex v1.8.4
[INFO] [stderr]   Downloaded tokio v1.28.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2728482f2c9de987f71086a05c4d1d19b1925b1f81babebbe564911d777f9df4
[INFO] running `Command { std: "docker" "start" "-a" "2728482f2c9de987f71086a05c4d1d19b1925b1f81babebbe564911d777f9df4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2728482f2c9de987f71086a05c4d1d19b1925b1f81babebbe564911d777f9df4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2728482f2c9de987f71086a05c4d1d19b1925b1f81babebbe564911d777f9df4", kill_on_drop: false }`
[INFO] [stdout] 2728482f2c9de987f71086a05c4d1d19b1925b1f81babebbe564911d777f9df4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a925fadce0e3439373dc66baa1db6d61f29c04a10dd6193472f66fbc813f58c9
[INFO] running `Command { std: "docker" "start" "-a" "a925fadce0e3439373dc66baa1db6d61f29c04a10dd6193472f66fbc813f58c9", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.144
[INFO] [stderr]    Compiling proc-macro2 v1.0.59
[INFO] [stderr]    Compiling unicode-ident v1.0.9
[INFO] [stderr]    Compiling quote v1.0.28
[INFO] [stderr]    Compiling parking_lot_core v0.9.7
[INFO] [stderr]     Checking smallvec v1.10.0
[INFO] [stderr]    Compiling log v0.4.18
[INFO] [stderr]    Compiling futures-channel v0.3.28
[INFO] [stderr]    Compiling tokio v1.28.2
[INFO] [stderr]    Compiling serde v1.0.163
[INFO] [stderr]    Compiling io-lifetimes v1.0.11
[INFO] [stderr]     Checking once_cell v1.17.2
[INFO] [stderr]     Checking aho-corasick v1.0.2
[INFO] [stderr]    Compiling rustix v0.37.20
[INFO] [stderr]     Checking regex-syntax v0.7.2
[INFO] [stderr]    Compiling serde_json v1.0.96
[INFO] [stderr]     Checking termcolor v1.2.0
[INFO] [stderr]    Compiling crc16 v0.4.0
[INFO] [stderr]    Compiling async-trait v0.1.68
[INFO] [stderr]     Checking humantime v1.3.0
[INFO] [stderr]     Checking itoa v1.0.6
[INFO] [stderr]     Checking ryu v1.0.13
[INFO] [stderr]     Checking tracing-core v0.1.31
[INFO] [stderr]     Checking sha1_smol v1.0.0
[INFO] [stderr]     Checking tracing v0.1.37
[INFO] [stderr]    Compiling syn v2.0.18
[INFO] [stderr]     Checking getrandom v0.2.9
[INFO] [stderr]     Checking mio v0.8.8
[INFO] [stderr]     Checking socket2 v0.4.9
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[INFO] [stderr]     Checking num_cpus v1.15.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking parking_lot v0.12.1
[INFO] [stderr]     Checking regex v1.8.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
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[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]     Checking env_logger v0.10.0
[INFO] [stderr]     Checking pretty_env_logger v0.4.0
[INFO] [stderr]    Compiling futures-macro v0.3.28
[INFO] [stderr]    Compiling tokio-macros v2.1.0
[INFO] [stderr]    Compiling serde_derive v1.0.163
[INFO] [stderr]     Checking futures-util v0.3.28
[INFO] [stderr]     Checking futures-executor v0.3.28
[INFO] [stderr]     Checking futures v0.3.28
[INFO] [stderr]     Checking tokio-util v0.7.8
[INFO] [stderr]     Checking combine v4.6.6
[INFO] [stderr]     Checking uuid v1.3.4
[INFO] [stderr]     Checking redis v0.23.0
[INFO] [stderr]     Checking s4 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `RngCore`
[INFO] [stdout]  --> src/main.rs:7:30
[INFO] [stdout]   |
[INFO] [stdout] 7 | use rand::{Rng, SeedableRng, RngCore};
[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: `rand_core`
[INFO] [stdout]  --> src/main.rs:8:19
[INFO] [stdout]   |
[INFO] [stdout] 8 | use rand_chacha::{rand_core, ChaCha12Rng};
[INFO] [stdout]   |                   ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `futures::StreamExt`
[INFO] [stdout]   --> src/main.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use futures::StreamExt;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::*`
[INFO] [stdout]  --> src/rca.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::*;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::rca::*`
[INFO] [stdout]   --> src/main.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 22 | use crate::rca::*;
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `RngCore`
[INFO] [stdout]  --> src/main.rs:7:30
[INFO] [stdout]   |
[INFO] [stdout] 7 | use rand::{Rng, SeedableRng, RngCore};
[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: `rand_core`
[INFO] [stdout]  --> src/main.rs:8:19
[INFO] [stdout]   |
[INFO] [stdout] 8 | use rand_chacha::{rand_core, ChaCha12Rng};
[INFO] [stdout]   |                   ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `futures::StreamExt`
[INFO] [stdout]   --> src/main.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use futures::StreamExt;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::*`
[INFO] [stdout]  --> src/rca.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::*;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::rca::*`
[INFO] [stdout]   --> src/main.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 22 | use crate::rca::*;
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/s4.rs:151:29
[INFO] [stdout]     |
[INFO] [stdout] 151 |                         let mut data_ = Arc::new(tokio::sync::Mutex::new(data));
[INFO] [stdout]     |                             ----^^^^^
[INFO] [stdout]     |                             |
[INFO] [stdout]     |                             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/s4.rs:57:33
[INFO] [stdout]    |
[INFO] [stdout] 57 | pub async fn start_server<F, A>(mut api: F, redis_pubsub_msg_sender: tokio::sync::mpsc::Sender<String>, redis_client: redis::Client)...
[INFO] [stdout]    |                                 ----^^^
[INFO] [stdout]    |                                 |
[INFO] [stdout]    |                                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/s4.rs:68:9
[INFO] [stdout]    |
[INFO] [stdout] 68 |     let mut rand_generator = Arc::new(tokio::sync::Mutex::new(ChaCha12Rng::from_entropy()));
[INFO] [stdout]    |         ----^^^^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/s4.rs:69:29
[INFO] [stdout]    |
[INFO] [stdout] 69 |     let (mutex_data_sender, mut mutex_data_receiver) = tokio::sync::mpsc::channel::<Db>(SHARDS as usize);
[INFO] [stdout]    |                             ----^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |                             |
[INFO] [stdout]    |                             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/s4.rs:70:10
[INFO] [stdout]    |
[INFO] [stdout] 70 |     let (mut map_shards_sender, mut map_shards_receiver) = tokio::sync::broadcast::channel::<Vec<Arc<tokio::sync::Mutex<Db>>>>(SHARD...
[INFO] [stdout]    |          ----^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |          |
[INFO] [stdout]    |          help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/s4.rs:70:33
[INFO] [stdout]    |
[INFO] [stdout] 70 |     let (mut map_shards_sender, mut map_shards_receiver) = tokio::sync::broadcast::channel::<Vec<Arc<tokio::sync::Mutex<Db>>>>(SHARD...
[INFO] [stdout]    |                                 ----^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |                                 |
[INFO] [stdout]    |                                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/s4.rs:74:9
[INFO] [stdout]    |
[INFO] [stdout] 74 |     let mut mutex_data_sender = mutex_data_sender.clone();      
[INFO] [stdout]    |         ----^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/s4.rs:190:25
[INFO] [stdout]     |
[INFO] [stdout] 190 |             if let Some(mut d) = data{
[INFO] [stdout]     |                         ----^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/s4.rs:151:29
[INFO] [stdout]     |
[INFO] [stdout] 151 |                         let mut data_ = Arc::new(tokio::sync::Mutex::new(data));
[INFO] [stdout]     |                             ----^^^^^
[INFO] [stdout]     |                             |
[INFO] [stdout]     |                             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/s4.rs:57:33
[INFO] [stdout]    |
[INFO] [stdout] 57 | pub async fn start_server<F, A>(mut api: F, redis_pubsub_msg_sender: tokio::sync::mpsc::Sender<String>, redis_client: redis::Client)...
[INFO] [stdout]    |                                 ----^^^
[INFO] [stdout]    |                                 |
[INFO] [stdout]    |                                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/s4.rs:68:9
[INFO] [stdout]    |
[INFO] [stdout] 68 |     let mut rand_generator = Arc::new(tokio::sync::Mutex::new(ChaCha12Rng::from_entropy()));
[INFO] [stdout]    |         ----^^^^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/s4.rs:69:29
[INFO] [stdout]    |
[INFO] [stdout] 69 |     let (mutex_data_sender, mut mutex_data_receiver) = tokio::sync::mpsc::channel::<Db>(SHARDS as usize);
[INFO] [stdout]    |                             ----^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |                             |
[INFO] [stdout]    |                             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/s4.rs:70:10
[INFO] [stdout]    |
[INFO] [stdout] 70 |     let (mut map_shards_sender, mut map_shards_receiver) = tokio::sync::broadcast::channel::<Vec<Arc<tokio::sync::Mutex<Db>>>>(SHARD...
[INFO] [stdout]    |          ----^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |          |
[INFO] [stdout]    |          help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/s4.rs:70:33
[INFO] [stdout]    |
[INFO] [stdout] 70 |     let (mut map_shards_sender, mut map_shards_receiver) = tokio::sync::broadcast::channel::<Vec<Arc<tokio::sync::Mutex<Db>>>>(SHARD...
[INFO] [stdout]    |                                 ----^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |                                 |
[INFO] [stdout]    |                                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/s4.rs:74:9
[INFO] [stdout]    |
[INFO] [stdout] 74 |     let mut mutex_data_sender = mutex_data_sender.clone();      
[INFO] [stdout]    |         ----^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/s4.rs:190:25
[INFO] [stdout]     |
[INFO] [stdout] 190 |             if let Some(mut d) = data{
[INFO] [stdout]     |                         ----^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/s4.rs:283:25
[INFO] [stdout]     |
[INFO] [stdout] 283 |                     let mut rng = generator.lock().await;
[INFO] [stdout]     |                         ----^^^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/rca.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |     let mut data_instance = Data::<ArcedMutexed>{
[INFO] [stdout]    |         ----^^^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/s4.rs:283:25
[INFO] [stdout]     |
[INFO] [stdout] 283 |                     let mut rng = generator.lock().await;
[INFO] [stdout]     |                         ----^^^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/rca.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |     let mut data_instance = Data::<ArcedMutexed>{
[INFO] [stdout]    |         ----^^^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]    --> src/s4.rs:169:25
[INFO] [stdout]     |
[INFO] [stdout] 169 |                     Err(e) => {
[INFO] [stdout]     |                         ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]    --> src/s4.rs:174:36
[INFO] [stdout]     |
[INFO] [stdout] 174 |                         if let Err(e) = stream.shutdown().await{
[INFO] [stdout]     |                                    ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `addr`
[INFO] [stdout]    --> src/s4.rs:100:35
[INFO] [stdout]     |
[INFO] [stdout] 100 |         while let Ok((mut stream, addr)) = listener.accept().await{ 
[INFO] [stdout]     |                                   ^^^^ help: if this is intentional, prefix it with an underscore: `_addr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]    --> src/s4.rs:295:21
[INFO] [stdout]     |
[INFO] [stdout] 295 |                 Err(e) => {
[INFO] [stdout]     |                     ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]    --> src/s4.rs:169:25
[INFO] [stdout]     |
[INFO] [stdout] 169 |                     Err(e) => {
[INFO] [stdout]     |                         ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]    --> src/s4.rs:174:36
[INFO] [stdout]     |
[INFO] [stdout] 174 |                         if let Err(e) = stream.shutdown().await{
[INFO] [stdout]     |                                    ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `addr`
[INFO] [stdout]    --> src/s4.rs:100:35
[INFO] [stdout]     |
[INFO] [stdout] 100 |         while let Ok((mut stream, addr)) = listener.accept().await{ 
[INFO] [stdout]     |                                   ^^^^ help: if this is intentional, prefix it with an underscore: `_addr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `req`
[INFO] [stdout]   --> src/main.rs:84:23
[INFO] [stdout]    |
[INFO] [stdout] 84 |         start_server(|req, res| async move{
[INFO] [stdout]    |                       ^^^ help: if this is intentional, prefix it with an underscore: `_req`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]    --> src/s4.rs:295:21
[INFO] [stdout]     |
[INFO] [stdout] 295 |                 Err(e) => {
[INFO] [stdout]     |                     ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `res`
[INFO] [stdout]   --> src/main.rs:84:28
[INFO] [stdout]    |
[INFO] [stdout] 84 |         start_server(|req, res| async move{
[INFO] [stdout]    |                            ^^^ help: if this is intentional, prefix it with an underscore: `_res`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `data`
[INFO] [stdout]   --> src/main.rs:53:24
[INFO] [stdout]    |
[INFO] [stdout] 53 |         while let Some(data) = redis_pubsubs_msg_receiver.recv().await{
[INFO] [stdout]    |                        ^^^^ help: if this is intentional, prefix it with an underscore: `_data`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `race_condition_avoidance` is never used
[INFO] [stdout]  --> src/rca.rs:5:14
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub async fn race_condition_avoidance(){
[INFO] [stdout]   |              ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `req`
[INFO] [stdout]   --> src/main.rs:84:23
[INFO] [stdout]    |
[INFO] [stdout] 84 |         start_server(|req, res| async move{
[INFO] [stdout]    |                       ^^^ help: if this is intentional, prefix it with an underscore: `_req`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `res`
[INFO] [stdout]   --> src/main.rs:84:28
[INFO] [stdout]    |
[INFO] [stdout] 84 |         start_server(|req, res| async move{
[INFO] [stdout]    |                            ^^^ help: if this is intentional, prefix it with an underscore: `_res`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `data`
[INFO] [stdout]   --> src/main.rs:53:24
[INFO] [stdout]    |
[INFO] [stdout] 53 |         while let Some(data) = redis_pubsubs_msg_receiver.recv().await{
[INFO] [stdout]    |                        ^^^^ help: if this is intentional, prefix it with an underscore: `_data`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/s4.rs:148:25
[INFO] [stdout]     |
[INFO] [stdout] 148 |                         redis_pubsub_msg_sender.send(string_data.clone()).await;
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 148 |                         let _ = redis_pubsub_msg_sender.send(string_data.clone()).await;
[INFO] [stdout]     |                         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `race_condition_avoidance` is never used
[INFO] [stdout]  --> src/rca.rs:5:14
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub async fn race_condition_avoidance(){
[INFO] [stdout]   |              ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/s4.rs:148:25
[INFO] [stdout]     |
[INFO] [stdout] 148 |                         redis_pubsub_msg_sender.send(string_data.clone()).await;
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 148 |                         let _ = redis_pubsub_msg_sender.send(string_data.clone()).await;
[INFO] [stdout]     |                         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 26.25s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: redis v0.23.0
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 2`
[INFO] running `Command { std: "docker" "inspect" "a925fadce0e3439373dc66baa1db6d61f29c04a10dd6193472f66fbc813f58c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a925fadce0e3439373dc66baa1db6d61f29c04a10dd6193472f66fbc813f58c9", kill_on_drop: false }`
[INFO] [stdout] a925fadce0e3439373dc66baa1db6d61f29c04a10dd6193472f66fbc813f58c9
