[INFO] cloning repository https://github.com/maxfer1221/load-balancer-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/maxfer1221/load-balancer-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmaxfer1221%2Fload-balancer-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmaxfer1221%2Fload-balancer-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c35a9521484ae4a2745c1e62ed2bc3a4e651503d
[INFO] testing maxfer1221/load-balancer-rs against beta-2022-04-10 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmaxfer1221%2Fload-balancer-rs" "/workspace/builds/worker-11/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-11/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/maxfer1221/load-balancer-rs on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/maxfer1221/load-balancer-rs
[INFO] finished tweaking git repo https://github.com/maxfer1221/load-balancer-rs
[INFO] tweaked toml for git repo https://github.com/maxfer1221/load-balancer-rs written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] crate git repo https://github.com/maxfer1221/load-balancer-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5fb305aa2832992b1e20795cedb551c0fee1888bf1c64a8184ff7b2d0e7a26c2
[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" "5fb305aa2832992b1e20795cedb551c0fee1888bf1c64a8184ff7b2d0e7a26c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5fb305aa2832992b1e20795cedb551c0fee1888bf1c64a8184ff7b2d0e7a26c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5fb305aa2832992b1e20795cedb551c0fee1888bf1c64a8184ff7b2d0e7a26c2", kill_on_drop: false }`
[INFO] [stdout] 5fb305aa2832992b1e20795cedb551c0fee1888bf1c64a8184ff7b2d0e7a26c2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4c3345b34718fedd73b09fbf96553d78ca5b8e4a2e6e5727dbaf7d7f4f36ad2b
[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" "4c3345b34718fedd73b09fbf96553d78ca5b8e4a2e6e5727dbaf7d7f4f36ad2b", kill_on_drop: false }`
[INFO] [stderr]    Compiling futures-core v0.3.21
[INFO] [stderr]    Compiling syn v1.0.81
[INFO] [stderr]    Compiling futures-task v0.3.21
[INFO] [stderr]    Compiling futures-util v0.3.21
[INFO] [stderr]    Compiling futures-channel v0.3.21
[INFO] [stderr]    Compiling native-tls v0.2.10
[INFO] [stderr]    Compiling httparse v1.6.0
[INFO] [stderr]    Compiling futures-io v0.3.21
[INFO] [stderr]    Compiling futures-sink v0.3.21
[INFO] [stderr]    Compiling chunked_transfer v1.4.0
[INFO] [stderr]    Compiling ascii v1.0.0
[INFO] [stderr]    Compiling ipnet v2.4.0
[INFO] [stderr]    Compiling textwrap v0.15.0
[INFO] [stderr]    Compiling json v0.12.4
[INFO] [stderr]    Compiling openssl-sys v0.9.72
[INFO] [stderr]    Compiling tinyvec v1.5.0
[INFO] [stderr]    Compiling tracing-core v0.1.23
[INFO] [stderr]    Compiling socket2 v0.4.4
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling combine v4.6.2
[INFO] [stderr]    Compiling mio v0.8.2
[INFO] [stderr]    Compiling chrono v0.4.19
[INFO] [stderr]    Compiling clap v3.1.6
[INFO] [stderr]    Compiling tracing v0.1.32
[INFO] [stderr]    Compiling unicode-normalization v0.1.19
[INFO] [stderr]    Compiling tokio v1.17.0
[INFO] [stderr]    Compiling idna v0.2.3
[INFO] [stderr]    Compiling openssl v0.10.38
[INFO] [stderr]    Compiling url v2.2.2
[INFO] [stderr]    Compiling tiny_http v0.9.0
[INFO] [stderr]    Compiling tokio-util v0.6.9
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]    Compiling async-trait v0.1.51
[INFO] [stderr]    Compiling tokio-native-tls v0.3.0
[INFO] [stderr]    Compiling h2 v0.3.12
[INFO] [stderr]    Compiling redis v0.21.4
[INFO] [stderr]    Compiling hyper v0.14.18
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]    Compiling hyper-tls v0.5.0
[INFO] [stderr]    Compiling serde_urlencoded v0.7.1
[INFO] [stderr]    Compiling reqwest v0.11.10
[INFO] [stderr]    Compiling redis-caching v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `Arc`, `Mutex`, `collections::HashMap`
[INFO] [stdout]  --> src/main.rs:1:33
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{sync::{mpsc::channel, Arc, Mutex},  io::Cursor, collections::HashMap};
[INFO] [stdout]   |                                 ^^^  ^^^^^                ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Method`, `Request`
[INFO] [stdout]  --> src/main.rs:4:35
[INFO] [stdout]   |
[INFO] [stdout] 4 | use tiny_http::{Server, Response, Request, Method, Header};
[INFO] [stdout]   |                                   ^^^^^^^  ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `clap`
[INFO] [stdout]  --> src/main.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use clap;
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `collections::HashMap`
[INFO] [stdout]  --> src/sync.rs:1:19
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{thread, collections::HashMap};
[INFO] [stdout]   |                   ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ip`
[INFO] [stdout]   --> src/sync.rs:73:32
[INFO] [stdout]    |
[INFO] [stdout] 73 |             Event::HealthCheck(ip) => {
[INFO] [stdout]    |                                ^^ help: if this is intentional, prefix it with an underscore: `_ip`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `res`
[INFO] [stdout]   --> src/maps.rs:45:24
[INFO] [stdout]    |
[INFO] [stdout] 45 | pub fn response_map<T>(res: &reqwest::Response) -> tiny_http::Response<T> {
[INFO] [stdout]    |                        ^^^ help: if this is intentional, prefix it with an underscore: `_res`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `response`
[INFO] [stdout]   --> src/balancer/robin.rs:21:13
[INFO] [stdout]    |
[INFO] [stdout] 21 |         let response = request.send();
[INFO] [stdout]    |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_response`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `index`
[INFO] [stdout]   --> src/balancer/robin.rs:45:18
[INFO] [stdout]    |
[INFO] [stdout] 45 |             Some(index) => Err(String::from("DUPLICATE")),
[INFO] [stdout]    |                  ^^^^^ help: if this is intentional, prefix it with an underscore: `_index`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ip`
[INFO] [stdout]   --> src/balancer/robin.rs:61:28
[INFO] [stdout]    |
[INFO] [stdout] 61 |     fn health_check(&self, ip: String) -> Result<bool, String> {
[INFO] [stdout]    |                            ^^ help: if this is intentional, prefix it with an underscore: `_ip`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Backend`
[INFO] [stdout]  --> src/sync.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct Backend;
[INFO] [stdout]   |            ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `msg`
[INFO] [stdout]  --> src/maps.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     msg: String,
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]  --> src/maps.rs:4:10
[INFO] [stdout]   |
[INFO] [stdout] 4 | #[derive(Debug)]
[INFO] [stdout]   |          ^^^^^
[INFO] [stdout]   = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `response_map`
[INFO] [stdout]   --> src/maps.rs:45:8
[INFO] [stdout]    |
[INFO] [stdout] 45 | pub fn response_map<T>(res: &reqwest::Response) -> tiny_http::Response<T> {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `current`
[INFO] [stdout]   --> src/balancer/robin.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 35 |     current: usize,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/sync.rs:63:25
[INFO] [stdout]    |
[INFO] [stdout] 63 |                         (*guard).add_backend(ip);
[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 `Result` that must be used
[INFO] [stdout]   --> src/sync.rs:67:25
[INFO] [stdout]    |
[INFO] [stdout] 67 |                         (*guard).remove_backend(ip);
[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: 15 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 55s
[INFO] running `Command { std: "docker" "inspect" "4c3345b34718fedd73b09fbf96553d78ca5b8e4a2e6e5727dbaf7d7f4f36ad2b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4c3345b34718fedd73b09fbf96553d78ca5b8e4a2e6e5727dbaf7d7f4f36ad2b", kill_on_drop: false }`
[INFO] [stdout] 4c3345b34718fedd73b09fbf96553d78ca5b8e4a2e6e5727dbaf7d7f4f36ad2b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen" "--no-run" "--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] 603a775ef5892c21162247857e7e1b55b72483447703a91668a85002b4247a0d
[INFO] running `Command { std: "docker" "start" "-a" "603a775ef5892c21162247857e7e1b55b72483447703a91668a85002b4247a0d", kill_on_drop: false }`
[INFO] [stderr]    Compiling redis-caching v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `Arc`, `Mutex`, `collections::HashMap`
[INFO] [stdout]  --> src/main.rs:1:33
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{sync::{mpsc::channel, Arc, Mutex},  io::Cursor, collections::HashMap};
[INFO] [stdout]   |                                 ^^^  ^^^^^                ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Method`, `Request`
[INFO] [stdout]  --> src/main.rs:4:35
[INFO] [stdout]   |
[INFO] [stdout] 4 | use tiny_http::{Server, Response, Request, Method, Header};
[INFO] [stdout]   |                                   ^^^^^^^  ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `clap`
[INFO] [stdout]  --> src/main.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use clap;
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `collections::HashMap`
[INFO] [stdout]  --> src/sync.rs:1:19
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{thread, collections::HashMap};
[INFO] [stdout]   |                   ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ip`
[INFO] [stdout]   --> src/sync.rs:73:32
[INFO] [stdout]    |
[INFO] [stdout] 73 |             Event::HealthCheck(ip) => {
[INFO] [stdout]    |                                ^^ help: if this is intentional, prefix it with an underscore: `_ip`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `res`
[INFO] [stdout]   --> src/maps.rs:45:24
[INFO] [stdout]    |
[INFO] [stdout] 45 | pub fn response_map<T>(res: &reqwest::Response) -> tiny_http::Response<T> {
[INFO] [stdout]    |                        ^^^ help: if this is intentional, prefix it with an underscore: `_res`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `response`
[INFO] [stdout]   --> src/balancer/robin.rs:21:13
[INFO] [stdout]    |
[INFO] [stdout] 21 |         let response = request.send();
[INFO] [stdout]    |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_response`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `index`
[INFO] [stdout]   --> src/balancer/robin.rs:45:18
[INFO] [stdout]    |
[INFO] [stdout] 45 |             Some(index) => Err(String::from("DUPLICATE")),
[INFO] [stdout]    |                  ^^^^^ help: if this is intentional, prefix it with an underscore: `_index`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ip`
[INFO] [stdout]   --> src/balancer/robin.rs:61:28
[INFO] [stdout]    |
[INFO] [stdout] 61 |     fn health_check(&self, ip: String) -> Result<bool, String> {
[INFO] [stdout]    |                            ^^ help: if this is intentional, prefix it with an underscore: `_ip`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Backend`
[INFO] [stdout]  --> src/sync.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct Backend;
[INFO] [stdout]   |            ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `msg`
[INFO] [stdout]  --> src/maps.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     msg: String,
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]  --> src/maps.rs:4:10
[INFO] [stdout]   |
[INFO] [stdout] 4 | #[derive(Debug)]
[INFO] [stdout]   |          ^^^^^
[INFO] [stdout]   = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `response_map`
[INFO] [stdout]   --> src/maps.rs:45:8
[INFO] [stdout]    |
[INFO] [stdout] 45 | pub fn response_map<T>(res: &reqwest::Response) -> tiny_http::Response<T> {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `current`
[INFO] [stdout]   --> src/balancer/robin.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 35 |     current: usize,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/sync.rs:63:25
[INFO] [stdout]    |
[INFO] [stdout] 63 |                         (*guard).add_backend(ip);
[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 `Result` that must be used
[INFO] [stdout]   --> src/sync.rs:67:25
[INFO] [stdout]    |
[INFO] [stdout] 67 |                         (*guard).remove_backend(ip);
[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: 15 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.45s
[INFO] [stderr]   Executable unittests src/main.rs (/opt/rustwide/target/debug/deps/redis_caching-ff5011831de738c7)
[INFO] running `Command { std: "docker" "inspect" "603a775ef5892c21162247857e7e1b55b72483447703a91668a85002b4247a0d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "603a775ef5892c21162247857e7e1b55b72483447703a91668a85002b4247a0d", kill_on_drop: false }`
[INFO] [stdout] 603a775ef5892c21162247857e7e1b55b72483447703a91668a85002b4247a0d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen", 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] 7765d0d8b634afa895b748fa21f4525adaec0743d5aaf7d619578b18c6545a11
[INFO] running `Command { std: "docker" "start" "-a" "7765d0d8b634afa895b748fa21f4525adaec0743d5aaf7d619578b18c6545a11", kill_on_drop: false }`
[INFO] [stderr] warning: unused imports: `Arc`, `Mutex`, `collections::HashMap`
[INFO] [stderr]  --> src/main.rs:1:33
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::{sync::{mpsc::channel, Arc, Mutex},  io::Cursor, collections::HashMap};
[INFO] [stderr]   |                                 ^^^  ^^^^^                ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Method`, `Request`
[INFO] [stderr]  --> src/main.rs:4:35
[INFO] [stderr]   |
[INFO] [stderr] 4 | use tiny_http::{Server, Response, Request, Method, Header};
[INFO] [stderr]   |                                   ^^^^^^^  ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `clap`
[INFO] [stderr]  --> src/main.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use clap;
[INFO] [stderr]   |     ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `collections::HashMap`
[INFO] [stderr]  --> src/sync.rs:1:19
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::{thread, collections::HashMap};
[INFO] [stderr]   |                   ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `ip`
[INFO] [stderr]   --> src/sync.rs:73:32
[INFO] [stderr]    |
[INFO] [stderr] 73 |             Event::HealthCheck(ip) => {
[INFO] [stderr]    |                                ^^ help: if this is intentional, prefix it with an underscore: `_ip`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `res`
[INFO] [stderr]   --> src/maps.rs:45:24
[INFO] [stderr]    |
[INFO] [stderr] 45 | pub fn response_map<T>(res: &reqwest::Response) -> tiny_http::Response<T> {
[INFO] [stderr]    |                        ^^^ help: if this is intentional, prefix it with an underscore: `_res`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `response`
[INFO] [stderr]   --> src/balancer/robin.rs:21:13
[INFO] [stderr]    |
[INFO] [stderr] 21 |         let response = request.send();
[INFO] [stderr]    |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_response`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `index`
[INFO] [stderr]   --> src/balancer/robin.rs:45:18
[INFO] [stderr]    |
[INFO] [stderr] 45 |             Some(index) => Err(String::from("DUPLICATE")),
[INFO] [stderr]    |                  ^^^^^ help: if this is intentional, prefix it with an underscore: `_index`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `ip`
[INFO] [stderr]   --> src/balancer/robin.rs:61:28
[INFO] [stderr]    |
[INFO] [stderr] 61 |     fn health_check(&self, ip: String) -> Result<bool, String> {
[INFO] [stderr]    |                            ^^ help: if this is intentional, prefix it with an underscore: `_ip`
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Backend`
[INFO] [stderr]  --> src/sync.rs:6:12
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub struct Backend;
[INFO] [stderr]   |            ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `msg`
[INFO] [stderr]  --> src/maps.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     msg: String,
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr] note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]  --> src/maps.rs:4:10
[INFO] [stderr]   |
[INFO] [stderr] 4 | #[derive(Debug)]
[INFO] [stderr]   |          ^^^^^
[INFO] [stderr]   = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `response_map`
[INFO] [stderr]   --> src/maps.rs:45:8
[INFO] [stderr]    |
[INFO] [stderr] 45 | pub fn response_map<T>(res: &reqwest::Response) -> tiny_http::Response<T> {
[INFO] [stderr]    |        ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `current`
[INFO] [stderr]   --> src/balancer/robin.rs:35:5
[INFO] [stderr]    |
[INFO] [stderr] 35 |     current: usize,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/sync.rs:63:25
[INFO] [stderr]    |
[INFO] [stderr] 63 |                         (*guard).add_backend(ip);
[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 `Result` that must be used
[INFO] [stderr]   --> src/sync.rs:67:25
[INFO] [stderr]    |
[INFO] [stderr] 67 |                         (*guard).remove_backend(ip);
[INFO] [stderr]    |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: `redis-caching` (bin "redis-caching" test) generated 15 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.18s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/redis_caching-ff5011831de738c7)
[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" "7765d0d8b634afa895b748fa21f4525adaec0743d5aaf7d619578b18c6545a11", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7765d0d8b634afa895b748fa21f4525adaec0743d5aaf7d619578b18c6545a11", kill_on_drop: false }`
[INFO] [stdout] 7765d0d8b634afa895b748fa21f4525adaec0743d5aaf7d619578b18c6545a11