[INFO] fetching crate cargo-snippet 0.6.5...
[INFO] documenting cargo-snippet-0.6.5 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate cargo-snippet 0.6.5 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate cargo-snippet 0.6.5 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 cargo-snippet 0.6.5
[INFO] finished tweaking crates.io crate cargo-snippet 0.6.5
[INFO] tweaked toml for crates.io crate cargo-snippet 0.6.5 written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate crates.io crate cargo-snippet 0.6.5 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 psm v0.1.10
[INFO] [stderr]   Downloaded rustc-ap-rustc_graphviz v664.0.0
[INFO] [stderr]   Downloaded stacker v0.1.9
[INFO] [stderr]   Downloaded rustc-ap-rustc_feature v664.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_lexer v664.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_ast_passes v664.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_ast_pretty v664.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_attr v664.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_span v664.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_arena v664.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_data_structures v664.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_session v664.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_fs_util v664.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_index v664.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_macros v664.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_serialize v664.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_errors v664.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_parse v664.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_ast v664.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_expand v664.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_target v664.0.0
[INFO] [stderr]   Downloaded rustfmt-nightly v1.4.18
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] 19d20faa014cea308d831dbc630ee01ca872202d72cfab525038d6e1aa72e27e
[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" "19d20faa014cea308d831dbc630ee01ca872202d72cfab525038d6e1aa72e27e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "19d20faa014cea308d831dbc630ee01ca872202d72cfab525038d6e1aa72e27e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "19d20faa014cea308d831dbc630ee01ca872202d72cfab525038d6e1aa72e27e", kill_on_drop: false }`
[INFO] [stdout] 19d20faa014cea308d831dbc630ee01ca872202d72cfab525038d6e1aa72e27e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] 65712a7e3be1a321e0df1517a8959275fc6c35aa9e3d12ac640b29ecc94a58cd
[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" "65712a7e3be1a321e0df1517a8959275fc6c35aa9e3d12ac640b29ecc94a58cd", kill_on_drop: false }`
[INFO] [stderr]  Documenting cargo-snippet v0.6.5 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.56s
[INFO] running `Command { std: "docker" "inspect" "65712a7e3be1a321e0df1517a8959275fc6c35aa9e3d12ac640b29ecc94a58cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "65712a7e3be1a321e0df1517a8959275fc6c35aa9e3d12ac640b29ecc94a58cd", kill_on_drop: false }`
[INFO] [stdout] 65712a7e3be1a321e0df1517a8959275fc6c35aa9e3d12ac640b29ecc94a58cd