[INFO] fetching crate heartbeat 0.0.1...
[INFO] documenting heartbeat-0.0.1 against beta-2021-08-01 for beta-1.55-rustdoc-1
[INFO] extracting crate heartbeat 0.0.1 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate heartbeat 0.0.1 on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate heartbeat 0.0.1
[INFO] finished tweaking crates.io crate heartbeat 0.0.1
[INFO] tweaked toml for crates.io crate heartbeat 0.0.1 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 17c64b7b4d5e12d36dc27a96ce5355e46db9b4a756b8c6c16c0505c2b8b4a2be
[INFO] running `Command { std: "docker" "start" "-a" "17c64b7b4d5e12d36dc27a96ce5355e46db9b4a756b8c6c16c0505c2b8b4a2be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "17c64b7b4d5e12d36dc27a96ce5355e46db9b4a756b8c6c16c0505c2b8b4a2be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "17c64b7b4d5e12d36dc27a96ce5355e46db9b4a756b8c6c16c0505c2b8b4a2be", kill_on_drop: false }`
[INFO] [stdout] 17c64b7b4d5e12d36dc27a96ce5355e46db9b4a756b8c6c16c0505c2b8b4a2be
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "RUSTDOCFLAGS=--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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9f0c2d11d2e93d74978a1f54349a8aa7a362ca6a329a326e0155082fd3b4caac
[INFO] running `Command { std: "docker" "start" "-a" "9f0c2d11d2e93d74978a1f54349a8aa7a362ca6a329a326e0155082fd3b4caac", kill_on_drop: false }`
[INFO] [stderr]     Checking serde v1.0.127
[INFO] [stderr]     Checking toml v0.5.8
[INFO] [stderr]  Documenting heartbeat v0.0.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.96s
[INFO] running `Command { std: "docker" "inspect" "9f0c2d11d2e93d74978a1f54349a8aa7a362ca6a329a326e0155082fd3b4caac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9f0c2d11d2e93d74978a1f54349a8aa7a362ca6a329a326e0155082fd3b4caac", kill_on_drop: false }`
[INFO] [stdout] 9f0c2d11d2e93d74978a1f54349a8aa7a362ca6a329a326e0155082fd3b4caac
