[INFO] fetching crate darling 0.10.2...
[INFO] documenting darling-0.10.2 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate darling 0.10.2 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate darling 0.10.2 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 darling 0.10.2
[INFO] finished tweaking crates.io crate darling 0.10.2
[INFO] tweaked toml for crates.io crate darling 0.10.2 written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate crates.io crate darling 0.10.2 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]  Downloading crates ...
[INFO] [stderr]   Downloaded ident_case v1.0.0
[INFO] [stderr]   Downloaded quote v1.0.0
[INFO] [stderr]   Downloaded proc-macro2 v1.0.0
[INFO] [stderr]   Downloaded syn v1.0.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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] 76f72995ac17bc4c4a52cb574112c7a2395cf6abb6df2145db3a8d9f6a737961
[INFO] running `Command { std: "docker" "start" "-a" "76f72995ac17bc4c4a52cb574112c7a2395cf6abb6df2145db3a8d9f6a737961", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "76f72995ac17bc4c4a52cb574112c7a2395cf6abb6df2145db3a8d9f6a737961", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "76f72995ac17bc4c4a52cb574112c7a2395cf6abb6df2145db3a8d9f6a737961", kill_on_drop: false }`
[INFO] [stdout] 76f72995ac17bc4c4a52cb574112c7a2395cf6abb6df2145db3a8d9f6a737961
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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] 3b97b4d8e5f8c26c73c144cd91b8ba9f4c1b221be3d11394f1747ca763a675b0
[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" "3b97b4d8e5f8c26c73c144cd91b8ba9f4c1b221be3d11394f1747ca763a675b0", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.0
[INFO] [stderr]    Compiling syn v1.0.1
[INFO] [stderr]    Compiling ident_case v1.0.0
[INFO] [stderr]    Compiling strsim v0.9.2
[INFO] [stderr]     Checking quote v1.0.0
[INFO] [stderr]     Checking darling_core v0.10.2
[INFO] [stderr]    Compiling darling_macro v0.10.2
[INFO] [stderr]  Documenting darling v0.10.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 31.30s
[INFO] running `Command { std: "docker" "inspect" "3b97b4d8e5f8c26c73c144cd91b8ba9f4c1b221be3d11394f1747ca763a675b0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3b97b4d8e5f8c26c73c144cd91b8ba9f4c1b221be3d11394f1747ca763a675b0", kill_on_drop: false }`
[INFO] [stdout] 3b97b4d8e5f8c26c73c144cd91b8ba9f4c1b221be3d11394f1747ca763a675b0