[INFO] fetching crate powerset-enum 0.1.0...
[INFO] documenting powerset-enum-0.1.0 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate powerset-enum 0.1.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate powerset-enum 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 powerset-enum 0.1.0
[INFO] finished tweaking crates.io crate powerset-enum 0.1.0
[INFO] tweaked toml for crates.io crate powerset-enum 0.1.0 written to /workspace/builds/worker-4/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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded powerset-enum-traits v0.1.0
[INFO] [stderr]   Downloaded powerset-enum-attr v0.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] 6b208d36a6c654972bd44530f9bfa22cce68a5ff9222d6462b7d1b2bf61a1a97
[INFO] running `Command { std: "docker" "start" "-a" "6b208d36a6c654972bd44530f9bfa22cce68a5ff9222d6462b7d1b2bf61a1a97", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6b208d36a6c654972bd44530f9bfa22cce68a5ff9222d6462b7d1b2bf61a1a97", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6b208d36a6c654972bd44530f9bfa22cce68a5ff9222d6462b7d1b2bf61a1a97", kill_on_drop: false }`
[INFO] [stdout] 6b208d36a6c654972bd44530f9bfa22cce68a5ff9222d6462b7d1b2bf61a1a97
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] 01d58895330523769613c4988bbe47edb056eec625426a4b0137f08c453da022
[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" "01d58895330523769613c4988bbe47edb056eec625426a4b0137f08c453da022", kill_on_drop: false }`
[INFO] [stderr]     Checking powerset-enum-traits v0.1.0
[INFO] [stderr]    Compiling powerset-enum-attr v0.1.0
[INFO] [stderr]  Documenting powerset-enum v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: Rust code block is empty
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/powerset-enum-attr-0.1.0/src/lib.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 21 | /// ```
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout] help: mark blocks that do not contain Rust code as text
[INFO] [stdout]    |
[INFO] [stdout] 21 | /// ```text
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.38s
[INFO] running `Command { std: "docker" "inspect" "01d58895330523769613c4988bbe47edb056eec625426a4b0137f08c453da022", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "01d58895330523769613c4988bbe47edb056eec625426a4b0137f08c453da022", kill_on_drop: false }`
[INFO] [stdout] 01d58895330523769613c4988bbe47edb056eec625426a4b0137f08c453da022