[INFO] cloning repository https://github.com/vedranvinko/emma
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/vedranvinko/emma" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvedranvinko%2Femma"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvedranvinko%2Femma'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 9e2290966f434fcd2fa110ad219ab483ea7b47ab
[INFO] checking vedranvinko/emma against master#6250d56355d72264ece721e8d0dc95b16a6824b1 for pr-68350
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvedranvinko%2Femma" "/workspace/builds/worker-3/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/vedranvinko/emma on toolchain 6250d56355d72264ece721e8d0dc95b16a6824b1
[INFO] running `"/workspace/cargo-home/bin/cargo" "+6250d56355d72264ece721e8d0dc95b16a6824b1" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/vedranvinko/emma
[INFO] finished tweaking git repo https://github.com/vedranvinko/emma
[INFO] tweaked toml for git repo https://github.com/vedranvinko/emma written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/vedranvinko/emma already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+6250d56355d72264ece721e8d0dc95b16a6824b1" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+6250d56355d72264ece721e8d0dc95b16a6824b1" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 6d2787977f38d0e2a7f23978cd504596c07df53d0677e5f7c37a70be06d83576
[INFO] running `"docker" "start" "-a" "6d2787977f38d0e2a7f23978cd504596c07df53d0677e5f7c37a70be06d83576"`
[INFO] [stderr]    Compiling serde_derive v1.0.103
[INFO] [stderr]     Checking ws v0.9.1
[INFO] [stderr]     Checking serde v1.0.103
[INFO] [stderr]     Checking serde_json v1.0.42
[INFO] [stderr]     Checking notify v5.0.0-pre.1
[INFO] [stderr]     Checking emma v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `connect`
[INFO] [stderr]   --> src/main.rs:12:10
[INFO] [stderr]    |
[INFO] [stderr] 12 | use ws::{connect, listen, CloseCode, Sender, Handler, Message, Result as OtherResult};
[INFO] [stderr]    |          ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]   --> src/main.rs:73:5
[INFO] [stderr]    |
[INFO] [stderr] 66 | /     loop {
[INFO] [stderr] 67 | |         match rx.recv() {
[INFO] [stderr] 68 | |             Ok(event) => println!("Changed: {:?}", event),
[INFO] [stderr] 69 | |             Err(err)  => println!("Error: {:?}", err),
[INFO] [stderr] 70 | |         };
[INFO] [stderr] 71 | |     }
[INFO] [stderr]    | |_____- any code following this expression is unreachable
[INFO] [stderr] 72 |       
[INFO] [stderr] 73 |       Ok(())
[INFO] [stderr]    |       ^^^^^^ unreachable expression
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `code`
[INFO] [stderr]   --> src/main.rs:28:32
[INFO] [stderr]    |
[INFO] [stderr] 28 |         fn on_close(&mut self, code: CloseCode, reason: &str) {
[INFO] [stderr]    |                                ^^^^ help: consider prefixing with an underscore: `_code`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `reason`
[INFO] [stderr]   --> src/main.rs:28:49
[INFO] [stderr]    |
[INFO] [stderr] 28 |         fn on_close(&mut self, code: CloseCode, reason: &str) {
[INFO] [stderr]    |                                                 ^^^^^^ help: consider prefixing with an underscore: `_reason`
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `connect`
[INFO] [stderr]   --> src/main.rs:12:10
[INFO] [stderr]    |
[INFO] [stderr] 12 | use ws::{connect, listen, CloseCode, Sender, Handler, Message, Result as OtherResult};
[INFO] [stderr]    |          ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]   --> src/main.rs:73:5
[INFO] [stderr]    |
[INFO] [stderr] 66 | /     loop {
[INFO] [stderr] 67 | |         match rx.recv() {
[INFO] [stderr] 68 | |             Ok(event) => println!("Changed: {:?}", event),
[INFO] [stderr] 69 | |             Err(err)  => println!("Error: {:?}", err),
[INFO] [stderr] 70 | |         };
[INFO] [stderr] 71 | |     }
[INFO] [stderr]    | |_____- any code following this expression is unreachable
[INFO] [stderr] 72 |       
[INFO] [stderr] 73 |       Ok(())
[INFO] [stderr]    |       ^^^^^^ unreachable expression
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `code`
[INFO] [stderr]   --> src/main.rs:28:32
[INFO] [stderr]    |
[INFO] [stderr] 28 |         fn on_close(&mut self, code: CloseCode, reason: &str) {
[INFO] [stderr]    |                                ^^^^ help: consider prefixing with an underscore: `_code`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `reason`
[INFO] [stderr]   --> src/main.rs:28:49
[INFO] [stderr]    |
[INFO] [stderr] 28 |         fn on_close(&mut self, code: CloseCode, reason: &str) {
[INFO] [stderr]    |                                                 ^^^^^^ help: consider prefixing with an underscore: `_reason`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 34.30s
[INFO] running `"docker" "inspect" "6d2787977f38d0e2a7f23978cd504596c07df53d0677e5f7c37a70be06d83576"`
[INFO] running `"docker" "rm" "-f" "6d2787977f38d0e2a7f23978cd504596c07df53d0677e5f7c37a70be06d83576"`
[INFO] [stdout] 6d2787977f38d0e2a7f23978cd504596c07df53d0677e5f7c37a70be06d83576