[INFO] fetching crate ranking 0.0.1...
[INFO] documenting ranking-0.0.1 against master#394e1b40d264aa6928811919c1124fa248e7d802 for pr-73566
[INFO] extracting crate ranking 0.0.1 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate ranking 0.0.1 on toolchain 394e1b40d264aa6928811919c1124fa248e7d802
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+394e1b40d264aa6928811919c1124fa248e7d802" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ranking 0.0.1
[INFO] finished tweaking crates.io crate ranking 0.0.1
[INFO] tweaked toml for crates.io crate ranking 0.0.1 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate crates.io crate ranking 0.0.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+394e1b40d264aa6928811919c1124fa248e7d802" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:819119df93c0f5eca3f29186f14981ef29945a311854d7222af07488600a2584" "/opt/rustwide/cargo-home/bin/cargo" "+394e1b40d264aa6928811919c1124fa248e7d802" "metadata" "--no-deps" "--format-version=1", 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] 0f6a0aaf5a963e36586aa46faab3e12420dc175e6ba4d40f07de795887ff2e20
[INFO] running `Command { std: "docker" "start" "-a" "0f6a0aaf5a963e36586aa46faab3e12420dc175e6ba4d40f07de795887ff2e20", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0f6a0aaf5a963e36586aa46faab3e12420dc175e6ba4d40f07de795887ff2e20", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0f6a0aaf5a963e36586aa46faab3e12420dc175e6ba4d40f07de795887ff2e20", kill_on_drop: false }`
[INFO] [stdout] 0f6a0aaf5a963e36586aa46faab3e12420dc175e6ba4d40f07de795887ff2e20
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:819119df93c0f5eca3f29186f14981ef29945a311854d7222af07488600a2584" "/opt/rustwide/cargo-home/bin/cargo" "+394e1b40d264aa6928811919c1124fa248e7d802" "doc" "--frozen" "--no-deps" "--document-private-items" "--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] 5f9551df474c0ae8df3aa639be4aae21bfc8e5fa7595f250488bc5fa32516285
[INFO] running `Command { std: "docker" "start" "-a" "5f9551df474c0ae8df3aa639be4aae21bfc8e5fa7595f250488bc5fa32516285", kill_on_drop: false }`
[INFO] [stderr]  Documenting ranking v0.0.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.36s
[INFO] running `Command { std: "docker" "inspect" "5f9551df474c0ae8df3aa639be4aae21bfc8e5fa7595f250488bc5fa32516285", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5f9551df474c0ae8df3aa639be4aae21bfc8e5fa7595f250488bc5fa32516285", kill_on_drop: false }`
[INFO] [stdout] 5f9551df474c0ae8df3aa639be4aae21bfc8e5fa7595f250488bc5fa32516285