[INFO] cloning repository https://github.com/apstone/tiny_cli_chat
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/apstone/tiny_cli_chat" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fapstone%2Ftiny_cli_chat", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fapstone%2Ftiny_cli_chat'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9c7eed256b447773d2672408a47a5a76550b2dc7
[INFO] checking apstone/tiny_cli_chat against try#099af82bc034c1e4895c90e5407fafdd61976cdb for pr-145457
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fapstone%2Ftiny_cli_chat" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/apstone/tiny_cli_chat
[INFO] finished tweaking git repo https://github.com/apstone/tiny_cli_chat
[INFO] tweaked toml for git repo https://github.com/apstone/tiny_cli_chat written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/apstone/tiny_cli_chat on toolchain 099af82bc034c1e4895c90e5407fafdd61976cdb
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+099af82bc034c1e4895c90e5407fafdd61976cdb" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/apstone/tiny_cli_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" "+099af82bc034c1e4895c90e5407fafdd61976cdb" "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-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+099af82bc034c1e4895c90e5407fafdd61976cdb" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d91e2202d40ae116443aa590a0011c847efb6514a6a231f23c8b9d1669910949
[INFO] running `Command { std: "docker" "start" "-a" "d91e2202d40ae116443aa590a0011c847efb6514a6a231f23c8b9d1669910949", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d91e2202d40ae116443aa590a0011c847efb6514a6a231f23c8b9d1669910949", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d91e2202d40ae116443aa590a0011c847efb6514a6a231f23c8b9d1669910949", kill_on_drop: false }`
[INFO] [stdout] d91e2202d40ae116443aa590a0011c847efb6514a6a231f23c8b9d1669910949
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+099af82bc034c1e4895c90e5407fafdd61976cdb" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 15cb4ec77e705ee10b50d7514bfb7089ab3c33841e24b755a6282a11e50066a7
[INFO] running `Command { std: "docker" "start" "-a" "15cb4ec77e705ee10b50d7514bfb7089ab3c33841e24b755a6282a11e50066a7", kill_on_drop: false }`
[INFO] [stderr]     Checking tiny_cli_chat v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `rx`
[INFO] [stdout]   --> src/client.rs:15:14
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let (tx, rx) = mpsc::channel::<String>();
[INFO] [stdout]    |              ^^ help: if this is intentional, prefix it with an underscore: `_rx`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rx`
[INFO] [stdout]   --> src/client.rs:15:14
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let (tx, rx) = mpsc::channel::<String>();
[INFO] [stdout]    |              ^^ help: if this is intentional, prefix it with an underscore: `_rx`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tx`
[INFO] [stdout]   --> src/client.rs:37:45
[INFO] [stdout]    |
[INFO] [stdout] 37 | fn handle_user_input(mut stream: TcpStream, tx: Sender<String>) {
[INFO] [stdout]    |                                             ^^ help: if this is intentional, prefix it with an underscore: `_tx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tx`
[INFO] [stdout]   --> src/client.rs:37:45
[INFO] [stdout]    |
[INFO] [stdout] 37 | fn handle_user_input(mut stream: TcpStream, tx: Sender<String>) {
[INFO] [stdout]    |                                             ^^ help: if this is intentional, prefix it with an underscore: `_tx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.08s
[INFO] running `Command { std: "docker" "inspect" "15cb4ec77e705ee10b50d7514bfb7089ab3c33841e24b755a6282a11e50066a7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "15cb4ec77e705ee10b50d7514bfb7089ab3c33841e24b755a6282a11e50066a7", kill_on_drop: false }`
[INFO] [stdout] 15cb4ec77e705ee10b50d7514bfb7089ab3c33841e24b755a6282a11e50066a7