[INFO] fetching crate colorpal 0.0.1...
[INFO] checking colorpal-0.0.1 against master#dfd7b8d03fb93d0e03147d28b3be6d93260fa94d for pr-87050
[INFO] extracting crate colorpal 0.0.1 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate colorpal 0.0.1 on toolchain dfd7b8d03fb93d0e03147d28b3be6d93260fa94d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate colorpal 0.0.1
[INFO] finished tweaking crates.io crate colorpal 0.0.1
[INFO] tweaked toml for crates.io crate colorpal 0.0.1 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate colorpal 0.0.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "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/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1b4b54fc0dbe0cad0571ccca7a35d5de29bfc9fe720f4a78bc997e792ba3b733
[INFO] running `Command { std: "docker" "start" "-a" "1b4b54fc0dbe0cad0571ccca7a35d5de29bfc9fe720f4a78bc997e792ba3b733", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1b4b54fc0dbe0cad0571ccca7a35d5de29bfc9fe720f4a78bc997e792ba3b733", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1b4b54fc0dbe0cad0571ccca7a35d5de29bfc9fe720f4a78bc997e792ba3b733", kill_on_drop: false }`
[INFO] [stdout] 1b4b54fc0dbe0cad0571ccca7a35d5de29bfc9fe720f4a78bc997e792ba3b733
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 47d16357ada24339afafeaef749b16e970139470f47ce0709c9c2a2ec1a246bf
[INFO] running `Command { std: "docker" "start" "-a" "47d16357ada24339afafeaef749b16e970139470f47ce0709c9c2a2ec1a246bf", kill_on_drop: false }`
[INFO] [stderr]     Checking dominant_color v0.3.0
[INFO] [stderr]     Checking colorpal v0.0.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.28s
[INFO] running `Command { std: "docker" "inspect" "47d16357ada24339afafeaef749b16e970139470f47ce0709c9c2a2ec1a246bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "47d16357ada24339afafeaef749b16e970139470f47ce0709c9c2a2ec1a246bf", kill_on_drop: false }`
[INFO] [stdout] 47d16357ada24339afafeaef749b16e970139470f47ce0709c9c2a2ec1a246bf