[INFO] fetching crate riscv_emu_rust 0.2.0...
[INFO] documenting riscv_emu_rust-0.2.0 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate riscv_emu_rust 0.2.0 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate riscv_emu_rust 0.2.0 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 riscv_emu_rust 0.2.0
[INFO] finished tweaking crates.io crate riscv_emu_rust 0.2.0
[INFO] tweaked toml for crates.io crate riscv_emu_rust 0.2.0 written to /workspace/builds/worker-9/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] [stderr]     Blocking waiting for file lock on package cache
[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-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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] 31936902923dd29987e1d50820c37ae6902d9afbdf3f8d7afc5cc097119c35fc
[INFO] running `Command { std: "docker" "start" "-a" "31936902923dd29987e1d50820c37ae6902d9afbdf3f8d7afc5cc097119c35fc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "31936902923dd29987e1d50820c37ae6902d9afbdf3f8d7afc5cc097119c35fc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "31936902923dd29987e1d50820c37ae6902d9afbdf3f8d7afc5cc097119c35fc", kill_on_drop: false }`
[INFO] [stdout] 31936902923dd29987e1d50820c37ae6902d9afbdf3f8d7afc5cc097119c35fc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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] 90769d2695c54819ca278f7ffaa8506067432a6fdba267e383d0a63d66ce80ea
[INFO] running `Command { std: "docker" "start" "-a" "90769d2695c54819ca278f7ffaa8506067432a6fdba267e383d0a63d66ce80ea", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Documenting riscv_emu_rust v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.70s
[INFO] running `Command { std: "docker" "inspect" "90769d2695c54819ca278f7ffaa8506067432a6fdba267e383d0a63d66ce80ea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "90769d2695c54819ca278f7ffaa8506067432a6fdba267e383d0a63d66ce80ea", kill_on_drop: false }`
[INFO] [stdout] 90769d2695c54819ca278f7ffaa8506067432a6fdba267e383d0a63d66ce80ea