[INFO] fetching crate cargo-playground 0.1.0...
[INFO] checking cargo-playground-0.1.0 against master#0599f3403366d9c57f0625e6de3af214b5042a90 for pr-87710
[INFO] extracting crate cargo-playground 0.1.0 into /workspace/builds/worker-81/source
[INFO] validating manifest of crates.io crate cargo-playground 0.1.0 on toolchain 0599f3403366d9c57f0625e6de3af214b5042a90
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0599f3403366d9c57f0625e6de3af214b5042a90" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate cargo-playground 0.1.0
[INFO] finished tweaking crates.io crate cargo-playground 0.1.0
[INFO] tweaked toml for crates.io crate cargo-playground 0.1.0 written to /workspace/builds/worker-81/source/Cargo.toml
[INFO] crate crates.io crate cargo-playground 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0599f3403366d9c57f0625e6de3af214b5042a90" "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-81/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-81/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" "+0599f3403366d9c57f0625e6de3af214b5042a90" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b94c92192a52827d8e19a7d3e1d280c32408cbe155803b3801fcb2a3fc76a49a
[INFO] running `Command { std: "docker" "start" "-a" "b94c92192a52827d8e19a7d3e1d280c32408cbe155803b3801fcb2a3fc76a49a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b94c92192a52827d8e19a7d3e1d280c32408cbe155803b3801fcb2a3fc76a49a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b94c92192a52827d8e19a7d3e1d280c32408cbe155803b3801fcb2a3fc76a49a", kill_on_drop: false }`
[INFO] [stdout] b94c92192a52827d8e19a7d3e1d280c32408cbe155803b3801fcb2a3fc76a49a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-81/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-81/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" "+0599f3403366d9c57f0625e6de3af214b5042a90" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5e4ccdc0b8db41c2e29778630a1aa624036663885588bf7720e9b92646d0b3ed
[INFO] running `Command { std: "docker" "start" "-a" "5e4ccdc0b8db41c2e29778630a1aa624036663885588bf7720e9b92646d0b3ed", kill_on_drop: false }`
[INFO] [stderr]     Checking cargo-playground v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.43s
[INFO] running `Command { std: "docker" "inspect" "5e4ccdc0b8db41c2e29778630a1aa624036663885588bf7720e9b92646d0b3ed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5e4ccdc0b8db41c2e29778630a1aa624036663885588bf7720e9b92646d0b3ed", kill_on_drop: false }`
[INFO] [stdout] 5e4ccdc0b8db41c2e29778630a1aa624036663885588bf7720e9b92646d0b3ed