[INFO] fetching crate tax 0.0.7...
[INFO] documenting tax-0.0.7 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate tax 0.0.7 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate tax 0.0.7 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 tax 0.0.7
[INFO] finished tweaking crates.io crate tax 0.0.7
[INFO] tweaked toml for crates.io crate tax 0.0.7 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate crates.io crate tax 0.0.7 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-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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] d3b856c932f1b3a686d485ee879d8b33ad2d591473cd345cd13953d524eb754f
[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" "d3b856c932f1b3a686d485ee879d8b33ad2d591473cd345cd13953d524eb754f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d3b856c932f1b3a686d485ee879d8b33ad2d591473cd345cd13953d524eb754f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d3b856c932f1b3a686d485ee879d8b33ad2d591473cd345cd13953d524eb754f", kill_on_drop: false }`
[INFO] [stdout] d3b856c932f1b3a686d485ee879d8b33ad2d591473cd345cd13953d524eb754f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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] 3f6320e5510684df5ec79b97ae4c46284c3d6dc84883f4f7b2f1acec42386581
[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" "3f6320e5510684df5ec79b97ae4c46284c3d6dc84883f4f7b2f1acec42386581", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.34
[INFO] [stderr]     Checking dirs v3.0.1
[INFO] [stderr]     Checking colored v2.0.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.20
[INFO] [stderr]     Checking thiserror v1.0.20
[INFO] [stderr]     Checking which v4.0.1
[INFO] [stderr]  Documenting tax v0.0.7 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 13.72s
[INFO] running `Command { std: "docker" "inspect" "3f6320e5510684df5ec79b97ae4c46284c3d6dc84883f4f7b2f1acec42386581", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3f6320e5510684df5ec79b97ae4c46284c3d6dc84883f4f7b2f1acec42386581", kill_on_drop: false }`
[INFO] [stdout] 3f6320e5510684df5ec79b97ae4c46284c3d6dc84883f4f7b2f1acec42386581