[INFO] cloning repository https://github.com/Hermitter/rust-book-2018-notes
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Hermitter/rust-book-2018-notes" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FHermitter%2Frust-book-2018-notes", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FHermitter%2Frust-book-2018-notes'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] fcfe4313c342ffaac8443ccb84403c37e23cc419
[INFO] documenting Hermitter/rust-book-2018-notes against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FHermitter%2Frust-book-2018-notes" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Hermitter/rust-book-2018-notes 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 git repo https://github.com/Hermitter/rust-book-2018-notes
[INFO] finished tweaking git repo https://github.com/Hermitter/rust-book-2018-notes
[INFO] tweaked toml for git repo https://github.com/Hermitter/rust-book-2018-notes written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/Hermitter/rust-book-2018-notes 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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] 26d83fb3cfc0ce7486dc53f5e9d5e0886a74721c9352bcf2cca066e76b9a7af2
[INFO] running `Command { std: "docker" "start" "-a" "26d83fb3cfc0ce7486dc53f5e9d5e0886a74721c9352bcf2cca066e76b9a7af2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "26d83fb3cfc0ce7486dc53f5e9d5e0886a74721c9352bcf2cca066e76b9a7af2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "26d83fb3cfc0ce7486dc53f5e9d5e0886a74721c9352bcf2cca066e76b9a7af2", kill_on_drop: false }`
[INFO] [stdout] 26d83fb3cfc0ce7486dc53f5e9d5e0886a74721c9352bcf2cca066e76b9a7af2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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] b87bfaf9cdf180deba251ef0af64128ccb6526e954c2b3aa34d2bc8802cca8e5
[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" "b87bfaf9cdf180deba251ef0af64128ccb6526e954c2b3aa34d2bc8802cca8e5", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]  Documenting book v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variant `ice_cream` should have an upper camel case name
[INFO] [stdout]   --> src/bin/ch7_modules/main.rs:85:9
[INFO] [stdout]    |
[INFO] [stdout] 85 |         ice_cream,
[INFO] [stdout]    |         ^^^^^^^^^ help: convert the identifier to upper camel case: `IceCream`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `cake` should have an upper camel case name
[INFO] [stdout]   --> src/bin/ch7_modules/main.rs:86:9
[INFO] [stdout]    |
[INFO] [stdout] 86 |         cake,
[INFO] [stdout]    |         ^^^^ help: convert the identifier to upper camel case (notice the capitalization): `Cake`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: Could not document `book`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name ch12_building_a_cli_tool src/bin/ch12_building_a_cli_tool/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-b490c5b9afcfa764.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" "b87bfaf9cdf180deba251ef0af64128ccb6526e954c2b3aa34d2bc8802cca8e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b87bfaf9cdf180deba251ef0af64128ccb6526e954c2b3aa34d2bc8802cca8e5", kill_on_drop: false }`
[INFO] [stdout] b87bfaf9cdf180deba251ef0af64128ccb6526e954c2b3aa34d2bc8802cca8e5