[INFO] cloning repository https://github.com/meeran03/rust-chat
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/meeran03/rust-chat" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmeeran03%2Frust-chat", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmeeran03%2Frust-chat'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 51a3d0dd766b47d76421e633b2296c85c192dd37
[INFO] checking meeran03/rust-chat against master#9d28fe39763974a96d61232e96ac856735e4cdd6 for pr-139624
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmeeran03%2Frust-chat" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/meeran03/rust-chat on toolchain 9d28fe39763974a96d61232e96ac856735e4cdd6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9d28fe39763974a96d61232e96ac856735e4cdd6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/meeran03/rust-chat
[INFO] finished tweaking git repo https://github.com/meeran03/rust-chat
[INFO] tweaked toml for git repo https://github.com/meeran03/rust-chat written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/meeran03/rust-chat 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" "+9d28fe39763974a96d61232e96ac856735e4cdd6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+9d28fe39763974a96d61232e96ac856735e4cdd6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 138a51f193d4fb6e40b6dbb7efd8890637de18756ae49788f3b8166f6675ab28
[INFO] running `Command { std: "docker" "start" "-a" "138a51f193d4fb6e40b6dbb7efd8890637de18756ae49788f3b8166f6675ab28", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "138a51f193d4fb6e40b6dbb7efd8890637de18756ae49788f3b8166f6675ab28", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "138a51f193d4fb6e40b6dbb7efd8890637de18756ae49788f3b8166f6675ab28", kill_on_drop: false }`
[INFO] [stdout] 138a51f193d4fb6e40b6dbb7efd8890637de18756ae49788f3b8166f6675ab28
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+9d28fe39763974a96d61232e96ac856735e4cdd6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 67083282d82eee2d62f6cde7a9ae2e50bfb06011fd552ab6065821662b484321
[INFO] running `Command { std: "docker" "start" "-a" "67083282d82eee2d62f6cde7a9ae2e50bfb06011fd552ab6065821662b484321", kill_on_drop: false }`
[INFO] [stderr]     Checking chat_app v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Write`
[INFO] [stdout]  --> src/main.rs:2:21
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::io::{Read, Write};
[INFO] [stdout]   |                     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Write`
[INFO] [stdout]  --> src/main.rs:2:21
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::io::{Read, Write};
[INFO] [stdout]   |                     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `client`
[INFO] [stdout]   --> src/chat_room.rs:50:24
[INFO] [stdout]    |
[INFO] [stdout] 50 |         for (nickname, client) in clients.iter() {
[INFO] [stdout]    |                        ^^^^^^ help: if this is intentional, prefix it with an underscore: `_client`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `client`
[INFO] [stdout]   --> src/chat_room.rs:50:24
[INFO] [stdout]    |
[INFO] [stdout] 50 |         for (nickname, client) in clients.iter() {
[INFO] [stdout]    |                        ^^^^^^ help: if this is intentional, prefix it with an underscore: `_client`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `message`
[INFO] [stdout]   --> src/chat_room.rs:48:39
[INFO] [stdout]    |
[INFO] [stdout] 48 |     fn broadcast(&self, sender: &str, message: &str) {
[INFO] [stdout]    |                                       ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_message`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `message`
[INFO] [stdout]   --> src/chat_room.rs:48:39
[INFO] [stdout]    |
[INFO] [stdout] 48 |     fn broadcast(&self, sender: &str, message: &str) {
[INFO] [stdout]    |                                       ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_message`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `handle_client` is never used
[INFO] [stdout]   --> src/chat_room.rs:58:4
[INFO] [stdout]    |
[INFO] [stdout] 58 | fn handle_client(mut stream: TcpStream, chat_room: Arc<ChatRoom>) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `handle_client` is never used
[INFO] [stdout]   --> src/chat_room.rs:58:4
[INFO] [stdout]    |
[INFO] [stdout] 58 | fn handle_client(mut stream: TcpStream, chat_room: Arc<ChatRoom>) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.10s
[INFO] running `Command { std: "docker" "inspect" "67083282d82eee2d62f6cde7a9ae2e50bfb06011fd552ab6065821662b484321", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "67083282d82eee2d62f6cde7a9ae2e50bfb06011fd552ab6065821662b484321", kill_on_drop: false }`
[INFO] [stdout] 67083282d82eee2d62f6cde7a9ae2e50bfb06011fd552ab6065821662b484321