[INFO] fetching crate the_book 0.1.0...
[INFO] documenting the_book-0.1.0 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate the_book 0.1.0 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate the_book 0.1.0 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 the_book 0.1.0
[INFO] finished tweaking crates.io crate the_book 0.1.0
[INFO] tweaked toml for crates.io crate the_book 0.1.0 written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate crates.io crate the_book 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] fdf1cf183b1f143e92f16af8c89e3bdf4548a6a99ecb91e2ebd941c16c1f4784
[INFO] running `Command { std: "docker" "start" "-a" "fdf1cf183b1f143e92f16af8c89e3bdf4548a6a99ecb91e2ebd941c16c1f4784", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fdf1cf183b1f143e92f16af8c89e3bdf4548a6a99ecb91e2ebd941c16c1f4784", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fdf1cf183b1f143e92f16af8c89e3bdf4548a6a99ecb91e2ebd941c16c1f4784", kill_on_drop: false }`
[INFO] [stdout] fdf1cf183b1f143e92f16af8c89e3bdf4548a6a99ecb91e2ebd941c16c1f4784
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 7ecb48c380487e56fbca8ffe859739bf53773a13d1f99325bea5fa166937ba91
[INFO] running `Command { std: "docker" "start" "-a" "7ecb48c380487e56fbca8ffe859739bf53773a13d1f99325bea5fa166937ba91", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking rand v0.5.6
[INFO] [stderr]     Checking the_book v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]  Documenting the_book v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error: Could not document `the_book`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name ch_12_an_io_project_building_a_command_line_project src/bin/ch-12-an-io-project-building-a-command-line-project/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern rand=/opt/rustwide/target/debug/deps/librand-851fcecf2704ce44.rmeta --extern the_book=/opt/rustwide/target/debug/deps/libthe_book-0451bcfedd1ac1a1.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "7ecb48c380487e56fbca8ffe859739bf53773a13d1f99325bea5fa166937ba91", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7ecb48c380487e56fbca8ffe859739bf53773a13d1f99325bea5fa166937ba91", kill_on_drop: false }`
[INFO] [stdout] 7ecb48c380487e56fbca8ffe859739bf53773a13d1f99325bea5fa166937ba91