[INFO] fetching crate maildir 0.4.2...
[INFO] documenting maildir-0.4.2 against 1.46.0 for beta-1.47-rustdoc-1
[INFO] extracting crate maildir 0.4.2 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate maildir 0.4.2 on toolchain 1.46.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate maildir 0.4.2
[INFO] finished tweaking crates.io crate maildir 0.4.2
[INFO] tweaked toml for crates.io crate maildir 0.4.2 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate maildir 0.4.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "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" "+1.46.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fc3df14c0096f9625ad08fc91d97746073efff8dcf0decddf546f45e2e8135bb
[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" "fc3df14c0096f9625ad08fc91d97746073efff8dcf0decddf546f45e2e8135bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fc3df14c0096f9625ad08fc91d97746073efff8dcf0decddf546f45e2e8135bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fc3df14c0096f9625ad08fc91d97746073efff8dcf0decddf546f45e2e8135bb", kill_on_drop: false }`
[INFO] [stdout] fc3df14c0096f9625ad08fc91d97746073efff8dcf0decddf546f45e2e8135bb
[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" "+1.46.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 845fddb8cd4fe9365f1eb8042f59290cfb73d0f8be6f6a9c9c30f2014e1e59b0
[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" "845fddb8cd4fe9365f1eb8042f59290cfb73d0f8be6f6a9c9c30f2014e1e59b0", 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 encoding_rs v0.8.20
[INFO] [stderr]     Checking byteorder v1.2.6
[INFO] [stderr]     Checking gethostname v0.2.1
[INFO] [stderr]     Checking base64 v0.10.1
[INFO] [stderr]     Checking charset v0.1.2
[INFO] [stderr]     Checking mailparse v0.12.0
[INFO] [stderr]  Documenting maildir v0.4.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.11s
[INFO] running `Command { std: "docker" "inspect" "845fddb8cd4fe9365f1eb8042f59290cfb73d0f8be6f6a9c9c30f2014e1e59b0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "845fddb8cd4fe9365f1eb8042f59290cfb73d0f8be6f6a9c9c30f2014e1e59b0", kill_on_drop: false }`
[INFO] [stdout] 845fddb8cd4fe9365f1eb8042f59290cfb73d0f8be6f6a9c9c30f2014e1e59b0