[INFO] fetching crate artbull 0.1.1...
[INFO] checking artbull-0.1.1 against try#2b39fe756f52bc2825bf5b2bfc385cab922dae10 for pr-143011
[INFO] extracting crate artbull 0.1.1 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate artbull 0.1.1
[INFO] finished tweaking crates.io crate artbull 0.1.1
[INFO] tweaked toml for crates.io crate artbull 0.1.1 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate artbull 0.1.1 on toolchain 2b39fe756f52bc2825bf5b2bfc385cab922dae10
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2b39fe756f52bc2825bf5b2bfc385cab922dae10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate artbull 0.1.1 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" "+2b39fe756f52bc2825bf5b2bfc385cab922dae10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] checking artbull-0.1.1 against try#2b39fe756f52bc2825bf5b2bfc385cab922dae10 for pr-143011
[INFO] extracting crate artbull 0.1.1 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate artbull 0.1.1
[INFO] finished tweaking crates.io crate artbull 0.1.1
[INFO] tweaked toml for crates.io crate artbull 0.1.1 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate artbull 0.1.1 on toolchain 2b39fe756f52bc2825bf5b2bfc385cab922dae10
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2b39fe756f52bc2825bf5b2bfc385cab922dae10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate artbull 0.1.1 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" "+2b39fe756f52bc2825bf5b2bfc385cab922dae10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] checking artbull-0.1.1 against try#2b39fe756f52bc2825bf5b2bfc385cab922dae10 for pr-143011
[INFO] extracting crate artbull 0.1.1 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate artbull 0.1.1
[INFO] finished tweaking crates.io crate artbull 0.1.1
[INFO] tweaked toml for crates.io crate artbull 0.1.1 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate artbull 0.1.1 on toolchain 2b39fe756f52bc2825bf5b2bfc385cab922dae10
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2b39fe756f52bc2825bf5b2bfc385cab922dae10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate artbull 0.1.1 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" "+2b39fe756f52bc2825bf5b2bfc385cab922dae10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] checking artbull-0.1.1 against try#2b39fe756f52bc2825bf5b2bfc385cab922dae10 for pr-143011
[INFO] extracting crate artbull 0.1.1 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate artbull 0.1.1
[INFO] finished tweaking crates.io crate artbull 0.1.1
[INFO] tweaked toml for crates.io crate artbull 0.1.1 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate artbull 0.1.1 on toolchain 2b39fe756f52bc2825bf5b2bfc385cab922dae10
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2b39fe756f52bc2825bf5b2bfc385cab922dae10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate artbull 0.1.1 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" "+2b39fe756f52bc2825bf5b2bfc385cab922dae10" "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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+2b39fe756f52bc2825bf5b2bfc385cab922dae10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2374a44a2de141ca167ffad22f5f279f82108d73001af5651b7f42eda47eb84b
[INFO] running `Command { std: "docker" "start" "-a" "2374a44a2de141ca167ffad22f5f279f82108d73001af5651b7f42eda47eb84b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2374a44a2de141ca167ffad22f5f279f82108d73001af5651b7f42eda47eb84b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2374a44a2de141ca167ffad22f5f279f82108d73001af5651b7f42eda47eb84b", kill_on_drop: false }`
[INFO] [stdout] 2374a44a2de141ca167ffad22f5f279f82108d73001af5651b7f42eda47eb84b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+2b39fe756f52bc2825bf5b2bfc385cab922dae10" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1eee2a5e00c09098b667a3016332cf4a7b608aa97c0e7fe4bac8b7fda6ae2ab8
[INFO] running `Command { std: "docker" "start" "-a" "1eee2a5e00c09098b667a3016332cf4a7b608aa97c0e7fe4bac8b7fda6ae2ab8", kill_on_drop: false }`
[INFO] [stderr]     Checking artbull v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `mixed`
[INFO] [stdout]  --> src/main.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let mixed = mix(red, blue);
[INFO] [stdout]   |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_mixed`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `mixed`
[INFO] [stdout]  --> src/main.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let mixed = mix(red, blue);
[INFO] [stdout]   |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_mixed`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.06s
[INFO] running `Command { std: "docker" "inspect" "1eee2a5e00c09098b667a3016332cf4a7b608aa97c0e7fe4bac8b7fda6ae2ab8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1eee2a5e00c09098b667a3016332cf4a7b608aa97c0e7fe4bac8b7fda6ae2ab8", kill_on_drop: false }`
[INFO] [stdout] 1eee2a5e00c09098b667a3016332cf4a7b608aa97c0e7fe4bac8b7fda6ae2ab8