[INFO] cloning repository https://github.com/NaokiLH/tokio_chat
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/NaokiLH/tokio_chat" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNaokiLH%2Ftokio_chat", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNaokiLH%2Ftokio_chat'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] dc0790203f090610d3ed856aa85be93093e4c369
[INFO] testing NaokiLH/tokio_chat against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNaokiLH%2Ftokio_chat" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/NaokiLH/tokio_chat on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/NaokiLH/tokio_chat
[INFO] finished tweaking git repo https://github.com/NaokiLH/tokio_chat
[INFO] tweaked toml for git repo https://github.com/NaokiLH/tokio_chat written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/NaokiLH/tokio_chat already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 519616a1e4f75e49b015bb6334e9d5c23c8c49cb156682d882896e98c6964a97
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "519616a1e4f75e49b015bb6334e9d5c23c8c49cb156682d882896e98c6964a97", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "519616a1e4f75e49b015bb6334e9d5c23c8c49cb156682d882896e98c6964a97", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "519616a1e4f75e49b015bb6334e9d5c23c8c49cb156682d882896e98c6964a97", kill_on_drop: false }`
[INFO] [stdout] 519616a1e4f75e49b015bb6334e9d5c23c8c49cb156682d882896e98c6964a97
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2c5906467cfd4857bad85c9ec24b4411c57fc6024306f3169c7993e8fb77a7ce
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "2c5906467cfd4857bad85c9ec24b4411c57fc6024306f3169c7993e8fb77a7ce", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.72
[INFO] [stderr]    Compiling futures-sink v0.3.15
[INFO] [stderr]    Compiling futures-util v0.3.15
[INFO] [stderr]    Compiling getrandom v0.2.3
[INFO] [stderr]    Compiling rand_core v0.6.2
[INFO] [stderr]    Compiling rand_chacha v0.3.0
[INFO] [stderr]    Compiling rand v0.8.3
[INFO] [stderr]    Compiling thiserror-impl v1.0.25
[INFO] [stderr]    Compiling tokio-macros v1.2.0
[INFO] [stderr]    Compiling pin-project-internal v1.0.7
[INFO] [stderr]    Compiling futures-macro v0.3.15
[INFO] [stderr]    Compiling tokio v1.6.1
[INFO] [stderr]    Compiling thiserror v1.0.25
[INFO] [stderr]    Compiling tungstenite v0.13.0
[INFO] [stderr]    Compiling pin-project v1.0.7
[INFO] [stderr]    Compiling tokio-tungstenite v0.14.0
[INFO] [stderr]    Compiling tokio_chat v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `receiver`
[INFO] [stdout]   --> src/main.rs:10:18
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let (sender, receiver) = broadcast::channel::<ChatMessage>(5000);
[INFO] [stdout]    |                  ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_receiver`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` 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 32.40s
[INFO] running `Command { std: "docker" "inspect" "2c5906467cfd4857bad85c9ec24b4411c57fc6024306f3169c7993e8fb77a7ce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2c5906467cfd4857bad85c9ec24b4411c57fc6024306f3169c7993e8fb77a7ce", kill_on_drop: false }`
[INFO] [stdout] 2c5906467cfd4857bad85c9ec24b4411c57fc6024306f3169c7993e8fb77a7ce
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--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] 080a9fda3711967d463d1ba52eafc93ed1a7880e6111b2efbac4a51a917a2d4d
[INFO] running `Command { std: "docker" "start" "-a" "080a9fda3711967d463d1ba52eafc93ed1a7880e6111b2efbac4a51a917a2d4d", kill_on_drop: false }`
[INFO] [stderr]    Compiling tokio_chat v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `receiver`
[INFO] [stdout]   --> src/main.rs:10:18
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let (sender, receiver) = broadcast::channel::<ChatMessage>(5000);
[INFO] [stdout]    |                  ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_receiver`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.38s
[INFO] running `Command { std: "docker" "inspect" "080a9fda3711967d463d1ba52eafc93ed1a7880e6111b2efbac4a51a917a2d4d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "080a9fda3711967d463d1ba52eafc93ed1a7880e6111b2efbac4a51a917a2d4d", kill_on_drop: false }`
[INFO] [stdout] 080a9fda3711967d463d1ba52eafc93ed1a7880e6111b2efbac4a51a917a2d4d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] aae14f6c3a866d2b31f6359356f977826765e1cfb808dbc0fefb9ca98ee9ab4e
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "aae14f6c3a866d2b31f6359356f977826765e1cfb808dbc0fefb9ca98ee9ab4e", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `receiver`
[INFO] [stderr]   --> src/main.rs:10:18
[INFO] [stderr]    |
[INFO] [stderr] 10 |     let (sender, receiver) = broadcast::channel::<ChatMessage>(5000);
[INFO] [stderr]    |                  ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_receiver`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `tokio_chat` (bin "tokio_chat" test) generated 1 warning
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.09s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/tokio_chat-e764f8d5a8444c09)
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "aae14f6c3a866d2b31f6359356f977826765e1cfb808dbc0fefb9ca98ee9ab4e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aae14f6c3a866d2b31f6359356f977826765e1cfb808dbc0fefb9ca98ee9ab4e", kill_on_drop: false }`
[INFO] [stdout] aae14f6c3a866d2b31f6359356f977826765e1cfb808dbc0fefb9ca98ee9ab4e