[INFO] fetching crate serde-pickle 0.6.1...
[INFO] checking serde-pickle-0.6.1 against beta for pr-78714
[INFO] extracting crate serde-pickle 0.6.1 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate serde-pickle 0.6.1 on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate serde-pickle 0.6.1
[INFO] finished tweaking crates.io crate serde-pickle 0.6.1
[INFO] tweaked toml for crates.io crate serde-pickle 0.6.1 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate crates.io crate serde-pickle 0.6.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1eac24a3199dd1c8af18052a5cd766e9ca1ef30774d27c6b78088910fd7c013a
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "1eac24a3199dd1c8af18052a5cd766e9ca1ef30774d27c6b78088910fd7c013a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1eac24a3199dd1c8af18052a5cd766e9ca1ef30774d27c6b78088910fd7c013a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1eac24a3199dd1c8af18052a5cd766e9ca1ef30774d27c6b78088910fd7c013a", kill_on_drop: false }`
[INFO] [stdout] 1eac24a3199dd1c8af18052a5cd766e9ca1ef30774d27c6b78088910fd7c013a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a96720c9950eff3154fc3eb0cdd74a71230225e1e30b6b40276336f8cf280bd0
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "a96720c9950eff3154fc3eb0cdd74a71230225e1e30b6b40276336f8cf280bd0", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-integer v0.1.43
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking env_logger v0.6.2
[INFO] [stderr]     Checking rand v0.6.5
[INFO] [stderr]     Checking quickcheck v0.8.5
[INFO] [stderr]     Checking serde-pickle v0.6.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.88s
[INFO] running `Command { std: "docker" "inspect" "a96720c9950eff3154fc3eb0cdd74a71230225e1e30b6b40276336f8cf280bd0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a96720c9950eff3154fc3eb0cdd74a71230225e1e30b6b40276336f8cf280bd0", kill_on_drop: false }`
[INFO] [stdout] a96720c9950eff3154fc3eb0cdd74a71230225e1e30b6b40276336f8cf280bd0