[INFO] fetching crate io-result-optional 0.1.2...
[INFO] checking io-result-optional-0.1.2 against beta-2021-10-15 for beta-1.56-3
[INFO] extracting crate io-result-optional 0.1.2 into /workspace/builds/worker-27/source
[INFO] validating manifest of crates.io crate io-result-optional 0.1.2 on toolchain beta-2021-10-15
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-10-15" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate io-result-optional 0.1.2
[INFO] finished tweaking crates.io crate io-result-optional 0.1.2
[INFO] tweaked toml for crates.io crate io-result-optional 0.1.2 written to /workspace/builds/worker-27/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-10-15" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-10-15" "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-27/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/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" "+beta-2021-10-15" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] da7d52fd1b4a8c4b0e894ab077594ea7788d66b081bc1cf9ceaaed060b5c30cd
[INFO] running `Command { std: "docker" "start" "-a" "da7d52fd1b4a8c4b0e894ab077594ea7788d66b081bc1cf9ceaaed060b5c30cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "da7d52fd1b4a8c4b0e894ab077594ea7788d66b081bc1cf9ceaaed060b5c30cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "da7d52fd1b4a8c4b0e894ab077594ea7788d66b081bc1cf9ceaaed060b5c30cd", kill_on_drop: false }`
[INFO] [stdout] da7d52fd1b4a8c4b0e894ab077594ea7788d66b081bc1cf9ceaaed060b5c30cd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/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" "+beta-2021-10-15" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 438c5b60b158d9d779b634ef71be253554659fac747cee05b7dd29b6b5ab6353
[INFO] running `Command { std: "docker" "start" "-a" "438c5b60b158d9d779b634ef71be253554659fac747cee05b7dd29b6b5ab6353", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking io-result-optional v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.44s
[INFO] running `Command { std: "docker" "inspect" "438c5b60b158d9d779b634ef71be253554659fac747cee05b7dd29b6b5ab6353", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "438c5b60b158d9d779b634ef71be253554659fac747cee05b7dd29b6b5ab6353", kill_on_drop: false }`
[INFO] [stdout] 438c5b60b158d9d779b634ef71be253554659fac747cee05b7dd29b6b5ab6353
