[INFO] fetching crate backoff-rs 0.1.0...
[INFO] checking backoff-rs-0.1.0 against 1.55.0 for beta-1.56-3
[INFO] extracting crate backoff-rs 0.1.0 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate backoff-rs 0.1.0 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate backoff-rs 0.1.0
[INFO] finished tweaking crates.io crate backoff-rs 0.1.0
[INFO] tweaked toml for crates.io crate backoff-rs 0.1.0 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "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" "+1.55.0" "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-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 16536acd2910c675b436aa66495b5277e709c8d24c5799c96e7d58d7a3ec6a07
[INFO] running `Command { std: "docker" "start" "-a" "16536acd2910c675b436aa66495b5277e709c8d24c5799c96e7d58d7a3ec6a07", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "16536acd2910c675b436aa66495b5277e709c8d24c5799c96e7d58d7a3ec6a07", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "16536acd2910c675b436aa66495b5277e709c8d24c5799c96e7d58d7a3ec6a07", kill_on_drop: false }`
[INFO] [stdout] 16536acd2910c675b436aa66495b5277e709c8d24c5799c96e7d58d7a3ec6a07
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+1.55.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e84e809e3682d6d922cf28e9b4956fa07fa90182a9f8a11c54a37d51177c224f
[INFO] running `Command { std: "docker" "start" "-a" "e84e809e3682d6d922cf28e9b4956fa07fa90182a9f8a11c54a37d51177c224f", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.4
[INFO] [stderr]     Checking backoff-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.03s
[INFO] running `Command { std: "docker" "inspect" "e84e809e3682d6d922cf28e9b4956fa07fa90182a9f8a11c54a37d51177c224f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e84e809e3682d6d922cf28e9b4956fa07fa90182a9f8a11c54a37d51177c224f", kill_on_drop: false }`
[INFO] [stdout] e84e809e3682d6d922cf28e9b4956fa07fa90182a9f8a11c54a37d51177c224f
