[INFO] fetching crate billion 0.1.7...
[INFO] documenting billion-0.1.7 against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] extracting crate billion 0.1.7 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate billion 0.1.7 on toolchain beta-2022-05-20
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate billion 0.1.7
[INFO] finished tweaking crates.io crate billion 0.1.7
[INFO] tweaked toml for crates.io crate billion 0.1.7 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate billion 0.1.7 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 984eb7d37abed438680e06ff71bc3fdce3d13f636f6fc964d7dff2a3a24ff6a2
[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" "984eb7d37abed438680e06ff71bc3fdce3d13f636f6fc964d7dff2a3a24ff6a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "984eb7d37abed438680e06ff71bc3fdce3d13f636f6fc964d7dff2a3a24ff6a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "984eb7d37abed438680e06ff71bc3fdce3d13f636f6fc964d7dff2a3a24ff6a2", kill_on_drop: false }`
[INFO] [stdout] 984eb7d37abed438680e06ff71bc3fdce3d13f636f6fc964d7dff2a3a24ff6a2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "RUSTDOCFLAGS=--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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-05-20" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 799d40b02392e41fb7745065f7f817d514cf5953004dd6d2a3e35a87dc923c9e
[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" "799d40b02392e41fb7745065f7f817d514cf5953004dd6d2a3e35a87dc923c9e", kill_on_drop: false }`
[INFO] [stderr]  Documenting billion v0.1.7 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.43s
[INFO] running `Command { std: "docker" "inspect" "799d40b02392e41fb7745065f7f817d514cf5953004dd6d2a3e35a87dc923c9e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "799d40b02392e41fb7745065f7f817d514cf5953004dd6d2a3e35a87dc923c9e", kill_on_drop: false }`
[INFO] [stdout] 799d40b02392e41fb7745065f7f817d514cf5953004dd6d2a3e35a87dc923c9e