[INFO] fetching crate ether-dream 0.2.5...
[INFO] documenting ether-dream-0.2.5 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate ether-dream 0.2.5 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate ether-dream 0.2.5 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 ether-dream 0.2.5
[INFO] finished tweaking crates.io crate ether-dream 0.2.5
[INFO] tweaked toml for crates.io crate ether-dream 0.2.5 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate ether-dream 0.2.5 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]     Blocking waiting for file lock on package cache
[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] [stdout] 5e0539ba894bb5efef9b04d88d210ef6408579bd7ff8f9a7101b41cb3008431a
[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" "5e0539ba894bb5efef9b04d88d210ef6408579bd7ff8f9a7101b41cb3008431a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5e0539ba894bb5efef9b04d88d210ef6408579bd7ff8f9a7101b41cb3008431a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5e0539ba894bb5efef9b04d88d210ef6408579bd7ff8f9a7101b41cb3008431a", kill_on_drop: false }`
[INFO] [stdout] 5e0539ba894bb5efef9b04d88d210ef6408579bd7ff8f9a7101b41cb3008431a
[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] 0879cf8014449b91215fa1b0b53e6a4ac1179730eb896372cb639ad60bbda3bb
[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" "0879cf8014449b91215fa1b0b53e6a4ac1179730eb896372cb639ad60bbda3bb", kill_on_drop: false }`
[INFO] [stderr]  Documenting ether-dream v0.2.5 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.13s
[INFO] running `Command { std: "docker" "inspect" "0879cf8014449b91215fa1b0b53e6a4ac1179730eb896372cb639ad60bbda3bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0879cf8014449b91215fa1b0b53e6a4ac1179730eb896372cb639ad60bbda3bb", kill_on_drop: false }`
[INFO] [stdout] 0879cf8014449b91215fa1b0b53e6a4ac1179730eb896372cb639ad60bbda3bb