[INFO] fetching crate image-core 0.0.0...
[INFO] documenting image-core-0.0.0 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate image-core 0.0.0 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate image-core 0.0.0 on toolchain beta-2020-08-29
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate image-core 0.0.0
[INFO] finished tweaking crates.io crate image-core 0.0.0
[INFO] tweaked toml for crates.io crate image-core 0.0.0 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-08-29" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1e6470e01c1cb240521f3acda72f1457ff2a8fde4e1798315c1860f4e71a9e03
[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" "1e6470e01c1cb240521f3acda72f1457ff2a8fde4e1798315c1860f4e71a9e03", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1e6470e01c1cb240521f3acda72f1457ff2a8fde4e1798315c1860f4e71a9e03", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1e6470e01c1cb240521f3acda72f1457ff2a8fde4e1798315c1860f4e71a9e03", kill_on_drop: false }`
[INFO] [stdout] 1e6470e01c1cb240521f3acda72f1457ff2a8fde4e1798315c1860f4e71a9e03
[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" "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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-08-29" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 997990bfd20ca979f7b217fbc1629bb205f0ea88fbd611135cffc4ace4ed67d1
[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" "997990bfd20ca979f7b217fbc1629bb205f0ea88fbd611135cffc4ace4ed67d1", kill_on_drop: false }`
[INFO] [stderr]  Documenting image-core v0.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.46s
[INFO] running `Command { std: "docker" "inspect" "997990bfd20ca979f7b217fbc1629bb205f0ea88fbd611135cffc4ace4ed67d1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "997990bfd20ca979f7b217fbc1629bb205f0ea88fbd611135cffc4ace4ed67d1", kill_on_drop: false }`
[INFO] [stdout] 997990bfd20ca979f7b217fbc1629bb205f0ea88fbd611135cffc4ace4ed67d1