[INFO] cloning repository https://github.com/izissise/rustchat
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/izissise/rustchat" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fizissise%2Frustchat"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fizissise%2Frustchat'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] db94a8af0dd1d9df974a62a7d1ff4142d6e4729e
[INFO] checking izissise/rustchat against master#2748a9fd93dd1a00a4521f4f16de5befbf77f6cd for pr-62262-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fizissise%2Frustchat" "/workspace/builds/worker-8/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/izissise/rustchat on toolchain 2748a9fd93dd1a00a4521f4f16de5befbf77f6cd
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/izissise/rustchat
[INFO] finished tweaking git repo https://github.com/izissise/rustchat
[INFO] tweaked toml for git repo https://github.com/izissise/rustchat written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/izissise/rustchat already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "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] c19e902f316382ae40c911ab48472f80678efb4689741022830d63559b67aa18
[INFO] running `"docker" "start" "-a" "c19e902f316382ae40c911ab48472f80678efb4689741022830d63559b67aa18"`
[INFO] [stderr]     Checking log v0.4.1
[INFO] [stderr]     Checking net2 v0.2.32
[INFO] [stderr]     Checking crossbeam-epoch v0.4.1
[INFO] [stderr]     Checking tokio-timer v0.2.3
[INFO] [stderr]     Checking tokio-io v0.1.6
[INFO] [stderr]     Checking crossbeam-deque v0.3.1
[INFO] [stderr]     Checking mio v0.6.14
[INFO] [stderr]     Checking tokio-threadpool v0.1.3
[INFO] [stderr]     Checking tokio-reactor v0.1.1
[INFO] [stderr]     Checking tokio-fs v0.1.0
[INFO] [stderr]     Checking tokio-tcp v0.1.0
[INFO] [stderr]     Checking tokio-udp v0.1.0
[INFO] [stderr]     Checking tokio v0.1.6
[INFO] [stderr]     Checking rustchat v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: field is never used: `clients`
[INFO] [stderr]   --> src/main.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     clients: Vec<tokio::net::TcpStream>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `clients`
[INFO] [stderr]   --> src/main.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     clients: Vec<tokio::net::TcpStream>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.81s
[INFO] running `"docker" "inspect" "c19e902f316382ae40c911ab48472f80678efb4689741022830d63559b67aa18"`
[INFO] running `"docker" "rm" "-f" "c19e902f316382ae40c911ab48472f80678efb4689741022830d63559b67aa18"`
[INFO] [stdout] c19e902f316382ae40c911ab48472f80678efb4689741022830d63559b67aa18