[INFO] fetching crate at4_protocol 2.1.1...
[INFO] checking at4_protocol-2.1.1 against master#8007b506ac5da629f223b755f5a5391edd5f6d01 for pr-88041
[INFO] extracting crate at4_protocol 2.1.1 into /workspace/builds/worker-31/source
[INFO] validating manifest of crates.io crate at4_protocol 2.1.1 on toolchain 8007b506ac5da629f223b755f5a5391edd5f6d01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate at4_protocol 2.1.1
[INFO] finished tweaking crates.io crate at4_protocol 2.1.1
[INFO] tweaked toml for crates.io crate at4_protocol 2.1.1 written to /workspace/builds/worker-31/source/Cargo.toml
[INFO] crate crates.io crate at4_protocol 2.1.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded crc16 v0.4.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-31/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-31/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9ed471ed2f2dc7a8a663ae273495c75ed11b53e42c3c1e302c89238eb3580817
[INFO] running `Command { std: "docker" "start" "-a" "9ed471ed2f2dc7a8a663ae273495c75ed11b53e42c3c1e302c89238eb3580817", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9ed471ed2f2dc7a8a663ae273495c75ed11b53e42c3c1e302c89238eb3580817", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9ed471ed2f2dc7a8a663ae273495c75ed11b53e42c3c1e302c89238eb3580817", kill_on_drop: false }`
[INFO] [stdout] 9ed471ed2f2dc7a8a663ae273495c75ed11b53e42c3c1e302c89238eb3580817
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-31/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-31/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 48cf87c0ce5e4b489796c0bb0d7a36273e1fd6ac3d0b50d8daf7d9690faf9ed0
[INFO] running `Command { std: "docker" "start" "-a" "48cf87c0ce5e4b489796c0bb0d7a36273e1fd6ac3d0b50d8daf7d9690faf9ed0", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling crc16 v0.4.0
[INFO] [stderr]     Checking at4_protocol v2.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `message`
[INFO] [stdout]  --> examples/create_message.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let message = ACControlMessage::new(
[INFO] [stdout]   |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_message`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `m`
[INFO] [stdout]   --> examples/parse_example.rs:14:46
[INFO] [stdout]    |
[INFO] [stdout] 14 |             ReceivableMessage::GroupStatuses(m) => {
[INFO] [stdout]    |                                              ^ help: if this is intentional, prefix it with an underscore: `_m`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `m`
[INFO] [stdout]   --> examples/parse_example.rs:17:43
[INFO] [stdout]    |
[INFO] [stdout] 17 |             ReceivableMessage::ACStatuses(m) => {
[INFO] [stdout]    |                                           ^ help: if this is intentional, prefix it with an underscore: `_m`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 12.08s
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "48cf87c0ce5e4b489796c0bb0d7a36273e1fd6ac3d0b50d8daf7d9690faf9ed0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "48cf87c0ce5e4b489796c0bb0d7a36273e1fd6ac3d0b50d8daf7d9690faf9ed0", kill_on_drop: false }`
[INFO] [stdout] 48cf87c0ce5e4b489796c0bb0d7a36273e1fd6ac3d0b50d8daf7d9690faf9ed0