[INFO] fetching crate singularity 0.5.1...
[INFO] documenting singularity-0.5.1 against beta-2020-10-09 for beta-1.48-rustdoc-1
[INFO] extracting crate singularity 0.5.1 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate singularity 0.5.1 on toolchain beta-2020-10-09
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate singularity 0.5.1
[INFO] finished tweaking crates.io crate singularity 0.5.1
[INFO] tweaked toml for crates.io crate singularity 0.5.1 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate crates.io crate singularity 0.5.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "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-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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-2020-10-09" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 33300fc64b1c79bfd2858f48c18ccb36eb860bfeb7ccd008ad9b1bf03399ab8d
[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" "33300fc64b1c79bfd2858f48c18ccb36eb860bfeb7ccd008ad9b1bf03399ab8d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "33300fc64b1c79bfd2858f48c18ccb36eb860bfeb7ccd008ad9b1bf03399ab8d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "33300fc64b1c79bfd2858f48c18ccb36eb860bfeb7ccd008ad9b1bf03399ab8d", kill_on_drop: false }`
[INFO] [stdout] 33300fc64b1c79bfd2858f48c18ccb36eb860bfeb7ccd008ad9b1bf03399ab8d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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-2020-10-09" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 720c6c6685593cee37e4d68b4234c523c5d09430a18813ec8b9a893b645f5cfd
[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" "720c6c6685593cee37e4d68b4234c523c5d09430a18813ec8b9a893b645f5cfd", kill_on_drop: false }`
[INFO] [stderr]     Checking chunked_transfer v1.2.0
[INFO] [stderr]    Compiling time v0.2.20
[INFO] [stderr]     Checking qstring v0.7.2
[INFO] [stderr]     Checking ring v0.16.15
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]     Checking fern v0.6.0
[INFO] [stderr]    Compiling time-macros-impl v0.1.1
[INFO] [stderr]    Compiling thiserror-impl v1.0.20
[INFO] [stderr]     Checking directories v2.0.2
[INFO] [stderr]     Checking console v0.12.0
[INFO] [stderr]     Checking chrono v0.4.15
[INFO] [stderr]     Checking serde v1.0.116
[INFO] [stderr]     Checking indicatif v0.15.0
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking webpki v0.21.3
[INFO] [stderr]     Checking sct v0.6.0
[INFO] [stderr]    Compiling structopt-derive v0.4.10
[INFO] [stderr]     Checking webpki-roots v0.20.0
[INFO] [stderr]     Checking rustls v0.18.1
[INFO] [stderr]     Checking time-macros v0.1.0
[INFO] [stderr]     Checking thiserror v1.0.20
[INFO] [stderr]     Checking structopt v0.3.17
[INFO] [stderr]     Checking cookie v0.14.2
[INFO] [stderr]     Checking url v2.1.1
[INFO] [stderr]     Checking toml v0.5.6
[INFO] [stderr]     Checking ureq v1.4.1
[INFO] [stderr]     Checking confy v0.4.0
[INFO] [stderr]  Documenting singularity v0.5.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 14.89s
[INFO] running `Command { std: "docker" "inspect" "720c6c6685593cee37e4d68b4234c523c5d09430a18813ec8b9a893b645f5cfd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "720c6c6685593cee37e4d68b4234c523c5d09430a18813ec8b9a893b645f5cfd", kill_on_drop: false }`
[INFO] [stdout] 720c6c6685593cee37e4d68b4234c523c5d09430a18813ec8b9a893b645f5cfd
