[INFO] fetching crate spork 0.0.5...
[INFO] checking spork-0.0.5 against beta for pr-78714
[INFO] extracting crate spork 0.0.5 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate spork 0.0.5 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 spork 0.0.5
[INFO] finished tweaking crates.io crate spork 0.0.5
[INFO] tweaked toml for crates.io crate spork 0.0.5 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[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-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] 8774f1d2664ca43d5ffe8efcdc0ab1987abb9a77e9d5274e97ac01dae8ab57eb
[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" "8774f1d2664ca43d5ffe8efcdc0ab1987abb9a77e9d5274e97ac01dae8ab57eb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8774f1d2664ca43d5ffe8efcdc0ab1987abb9a77e9d5274e97ac01dae8ab57eb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8774f1d2664ca43d5ffe8efcdc0ab1987abb9a77e9d5274e97ac01dae8ab57eb", kill_on_drop: false }`
[INFO] [stdout] 8774f1d2664ca43d5ffe8efcdc0ab1987abb9a77e9d5274e97ac01dae8ab57eb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] 751562dc0bc839999a63a1a3bd8bf39cfdcbeafeae8c994ee373d103043af255
[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" "751562dc0bc839999a63a1a3bd8bf39cfdcbeafeae8c994ee373d103043af255", kill_on_drop: false }`
[INFO] [stderr]     Checking spork v0.0.5 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.33s
[INFO] running `Command { std: "docker" "inspect" "751562dc0bc839999a63a1a3bd8bf39cfdcbeafeae8c994ee373d103043af255", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "751562dc0bc839999a63a1a3bd8bf39cfdcbeafeae8c994ee373d103043af255", kill_on_drop: false }`
[INFO] [stdout] 751562dc0bc839999a63a1a3bd8bf39cfdcbeafeae8c994ee373d103043af255