[INFO] fetching crate yarf-sys 0.0.2...
[INFO] checking yarf-sys-0.0.2 against beta for pr-78714
[INFO] extracting crate yarf-sys 0.0.2 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate yarf-sys 0.0.2 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 yarf-sys 0.0.2
[INFO] finished tweaking crates.io crate yarf-sys 0.0.2
[INFO] tweaked toml for crates.io crate yarf-sys 0.0.2 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] [stderr] warning: file found to be present in multiple build targets: /workspace/builds/worker-7/source/examples/null_sys.rs
[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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] eba00e9d60c5c8c9e4a174d1ecf192bf3f8dc5a383fd63a3f22604f2392d9758
[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" "eba00e9d60c5c8c9e4a174d1ecf192bf3f8dc5a383fd63a3f22604f2392d9758", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "eba00e9d60c5c8c9e4a174d1ecf192bf3f8dc5a383fd63a3f22604f2392d9758", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eba00e9d60c5c8c9e4a174d1ecf192bf3f8dc5a383fd63a3f22604f2392d9758", kill_on_drop: false }`
[INFO] [stdout] eba00e9d60c5c8c9e4a174d1ecf192bf3f8dc5a383fd63a3f22604f2392d9758
[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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] f3f271020ac57365b965bdc4d5f58df6eefbe205b7920d294c200f4a21a43703
[INFO] running `Command { std: "docker" "start" "-a" "f3f271020ac57365b965bdc4d5f58df6eefbe205b7920d294c200f4a21a43703", kill_on_drop: false }`
[INFO] [stderr] warning: file found to be present in multiple build targets: /opt/rustwide/workdir/examples/null_sys.rs
[INFO] [stderr]    Compiling yarf-sys v0.0.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.52s
[INFO] running `Command { std: "docker" "inspect" "f3f271020ac57365b965bdc4d5f58df6eefbe205b7920d294c200f4a21a43703", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f3f271020ac57365b965bdc4d5f58df6eefbe205b7920d294c200f4a21a43703", kill_on_drop: false }`
[INFO] [stdout] f3f271020ac57365b965bdc4d5f58df6eefbe205b7920d294c200f4a21a43703