[INFO] cloning repository https://github.com/roneesh/rust_book_exercises
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/roneesh/rust_book_exercises" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Froneesh%2Frust_book_exercises", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Froneesh%2Frust_book_exercises'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a36288522b8d9fecc1f4ab9b10180647c046aa2a
[INFO] documenting roneesh/rust_book_exercises 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%2Froneesh%2Frust_book_exercises" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/roneesh/rust_book_exercises 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/roneesh/rust_book_exercises
[INFO] finished tweaking git repo https://github.com/roneesh/rust_book_exercises
[INFO] tweaked toml for git repo https://github.com/roneesh/rust_book_exercises written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/roneesh/rust_book_exercises 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-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] 869a778a1decb9e260657b9d40a2233439d10532e877e605403e59f7976de845
[INFO] running `Command { std: "docker" "start" "-a" "869a778a1decb9e260657b9d40a2233439d10532e877e605403e59f7976de845", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "869a778a1decb9e260657b9d40a2233439d10532e877e605403e59f7976de845", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "869a778a1decb9e260657b9d40a2233439d10532e877e605403e59f7976de845", kill_on_drop: false }`
[INFO] [stdout] 869a778a1decb9e260657b9d40a2233439d10532e877e605403e59f7976de845
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] d9988ca72382a601d979a5a1cba2a7116834fab1daac66c7c5e78fc813e090db
[INFO] running `Command { std: "docker" "start" "-a" "d9988ca72382a601d979a5a1cba2a7116834fab1daac66c7c5e78fc813e090db", kill_on_drop: false }`
[INFO] [stderr]  Documenting rust_book_exercises v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.56s
[INFO] running `Command { std: "docker" "inspect" "d9988ca72382a601d979a5a1cba2a7116834fab1daac66c7c5e78fc813e090db", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d9988ca72382a601d979a5a1cba2a7116834fab1daac66c7c5e78fc813e090db", kill_on_drop: false }`
[INFO] [stdout] d9988ca72382a601d979a5a1cba2a7116834fab1daac66c7c5e78fc813e090db