[INFO] cloning repository https://github.com/dylhack/tcpchat
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dylhack/tcpchat" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdylhack%2Ftcpchat", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdylhack%2Ftcpchat'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 40b79f92bcb46236be8fd801eea6c98bcf88c73a
[INFO] checking dylhack/tcpchat against try#575650af7d7ca88602df28e39d27bf3e456c306e for pr-80579
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdylhack%2Ftcpchat" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/dylhack/tcpchat on toolchain 575650af7d7ca88602df28e39d27bf3e456c306e
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+575650af7d7ca88602df28e39d27bf3e456c306e" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/dylhack/tcpchat
[INFO] finished tweaking git repo https://github.com/dylhack/tcpchat
[INFO] tweaked toml for git repo https://github.com/dylhack/tcpchat written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/dylhack/tcpchat already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+575650af7d7ca88602df28e39d27bf3e456c306e" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded mio v0.7.5
[INFO] [stderr]   Downloaded tokio v0.3.3
[INFO] [stderr]   Downloaded tokio-macros v0.3.1
[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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+575650af7d7ca88602df28e39d27bf3e456c306e" "metadata" "--no-deps" "--format-version=1", 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] 7b324315901b7df6e2058f27c597bf231122418d81346a485bf1aae952783298
[INFO] running `Command { std: "docker" "start" "-a" "7b324315901b7df6e2058f27c597bf231122418d81346a485bf1aae952783298", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7b324315901b7df6e2058f27c597bf231122418d81346a485bf1aae952783298", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7b324315901b7df6e2058f27c597bf231122418d81346a485bf1aae952783298", kill_on_drop: false }`
[INFO] [stdout] 7b324315901b7df6e2058f27c597bf231122418d81346a485bf1aae952783298
[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=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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+575650af7d7ca88602df28e39d27bf3e456c306e" "check" "--frozen" "--all" "--all-targets" "--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] fe4bad7a576d0ff63e5de487594dd5fa153e938e02ed1c3cf4e18037d76a6dd7
[INFO] running `Command { std: "docker" "start" "-a" "fe4bad7a576d0ff63e5de487594dd5fa153e938e02ed1c3cf4e18037d76a6dd7", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.48
[INFO] [stderr]     Checking bytes v0.6.0
[INFO] [stderr]     Checking instant v0.1.8
[INFO] [stderr]     Checking lock_api v0.4.1
[INFO] [stderr]    Compiling tokio v0.3.3
[INFO] [stderr]     Checking signal-hook-registry v1.2.2
[INFO] [stderr]     Checking mio v0.7.5
[INFO] [stderr]     Checking parking_lot_core v0.8.0
[INFO] [stderr]     Checking parking_lot v0.11.0
[INFO] [stderr]    Compiling tokio-macros v0.3.1
[INFO] [stderr]     Checking tcpchat v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `send_err`
[INFO] [stdout]   --> src/client/mod.rs:71:18
[INFO] [stdout]    |
[INFO] [stdout] 71 |     pub async fn send_err(&self, socket: TcpStream, packet: Packet) {
[INFO] [stdout]    |                  ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `send_err`
[INFO] [stdout]   --> src/client/mod.rs:71:18
[INFO] [stdout]    |
[INFO] [stdout] 71 |     pub async fn send_err(&self, socket: TcpStream, packet: Packet) {
[INFO] [stdout]    |                  ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 24.72s
[INFO] running `Command { std: "docker" "inspect" "fe4bad7a576d0ff63e5de487594dd5fa153e938e02ed1c3cf4e18037d76a6dd7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fe4bad7a576d0ff63e5de487594dd5fa153e938e02ed1c3cf4e18037d76a6dd7", kill_on_drop: false }`
[INFO] [stdout] fe4bad7a576d0ff63e5de487594dd5fa153e938e02ed1c3cf4e18037d76a6dd7