[INFO] fetching crate weft 0.1.0...
[INFO] documenting weft-0.1.0 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate weft 0.1.0 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate weft 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 weft 0.1.0
[INFO] finished tweaking crates.io crate weft 0.1.0
[INFO] tweaked toml for crates.io crate weft 0.1.0 written to /workspace/builds/worker-2/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]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded weft_derive v0.1.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] [stdout] 20cec3042255c2e7f429775e6e8a0d0c8b5379820051a9e0a04c7405c458bd0f
[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" "20cec3042255c2e7f429775e6e8a0d0c8b5379820051a9e0a04c7405c458bd0f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "20cec3042255c2e7f429775e6e8a0d0c8b5379820051a9e0a04c7405c458bd0f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "20cec3042255c2e7f429775e6e8a0d0c8b5379820051a9e0a04c7405c458bd0f", kill_on_drop: false }`
[INFO] [stdout] 20cec3042255c2e7f429775e6e8a0d0c8b5379820051a9e0a04c7405c458bd0f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] f46b987c1f7f2a1ad5ab9075fb2491488ccdad713dd8c00067be01e0069b411d
[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" "f46b987c1f7f2a1ad5ab9075fb2491488ccdad713dd8c00067be01e0069b411d", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling mac v0.1.1
[INFO] [stderr]    Compiling utf-8 v0.7.5
[INFO] [stderr]    Compiling nodrop v0.1.14
[INFO] [stderr]    Compiling stable_deref_trait v1.2.0
[INFO] [stderr]    Compiling thin-slice v0.1.1
[INFO] [stderr]    Compiling dtoa-short v0.3.2
[INFO] [stderr]    Compiling fxhash v0.2.1
[INFO] [stderr]    Compiling synstructure v0.12.4
[INFO] [stderr]    Compiling markup5ever v0.8.1
[INFO] [stderr]    Compiling markup5ever v0.7.5
[INFO] [stderr]    Compiling html5ever v0.23.0
[INFO] [stderr]    Compiling futf v0.1.4
[INFO] [stderr]    Compiling string_cache v0.7.5
[INFO] [stderr]    Compiling servo_arc v0.1.1
[INFO] [stderr]    Compiling cssparser v0.25.9
[INFO] [stderr]    Compiling tendril v0.4.1
[INFO] [stderr]    Compiling markup5ever v0.9.0
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]    Compiling selectors v0.21.0
[INFO] [stderr]    Compiling html5ever v0.24.1
[INFO] [stderr]    Compiling failure v0.1.8
[INFO] [stderr]     Checking html5ever v0.22.5
[INFO] [stderr]    Compiling kuchiki v0.7.3
[INFO] [stderr]    Compiling weft_derive v0.1.1
[INFO] [stderr]  Documenting weft v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 28.83s
[INFO] running `Command { std: "docker" "inspect" "f46b987c1f7f2a1ad5ab9075fb2491488ccdad713dd8c00067be01e0069b411d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f46b987c1f7f2a1ad5ab9075fb2491488ccdad713dd8c00067be01e0069b411d", kill_on_drop: false }`
[INFO] [stdout] f46b987c1f7f2a1ad5ab9075fb2491488ccdad713dd8c00067be01e0069b411d