[INFO] cloning repository https://github.com/blt/mmap_comm
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/blt/mmap_comm" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fblt%2Fmmap_comm", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fblt%2Fmmap_comm'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d0a505789d7e9ba8da6d04b2bf3f1b7e4617e897
[INFO] documenting blt/mmap_comm against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fblt%2Fmmap_comm" "/workspace/builds/worker-10/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-10/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/blt/mmap_comm 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 git repo https://github.com/blt/mmap_comm
[INFO] finished tweaking git repo https://github.com/blt/mmap_comm
[INFO] tweaked toml for git repo https://github.com/blt/mmap_comm written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate git repo https://github.com/blt/mmap_comm 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 stable_deref_trait v1.0.0
[INFO] [stderr]   Downloaded memmap v0.6.2
[INFO] [stderr]   Downloaded smallvec v0.6.0
[INFO] [stderr]   Downloaded clap v2.29.1
[INFO] [stderr]   Downloaded rand v0.3.20
[INFO] [stderr]   Downloaded winapi-i686-pc-windows-gnu v0.3.2
[INFO] [stderr]   Downloaded winapi v0.3.3
[INFO] [stderr]   Downloaded parking_lot_core v0.2.10
[INFO] [stderr]   Downloaded winapi-x86_64-pc-windows-gnu v0.3.2
[INFO] [stderr]   Downloaded parking_lot v0.5.3
[INFO] [stderr]   Downloaded quantiles v0.7.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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] 9028c70e64003f57fe8d5a9bd46f30b8567e41a66805a2fa53ad210a279b1f64
[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" "9028c70e64003f57fe8d5a9bd46f30b8567e41a66805a2fa53ad210a279b1f64", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9028c70e64003f57fe8d5a9bd46f30b8567e41a66805a2fa53ad210a279b1f64", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9028c70e64003f57fe8d5a9bd46f30b8567e41a66805a2fa53ad210a279b1f64", kill_on_drop: false }`
[INFO] [stdout] 9028c70e64003f57fe8d5a9bd46f30b8567e41a66805a2fa53ad210a279b1f64
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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] a714c41f8a11aa6fa821eba88671c10f64012fb8068869df08a818176f7044dd
[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" "a714c41f8a11aa6fa821eba88671c10f64012fb8068869df08a818176f7044dd", kill_on_drop: false }`
[INFO] [stderr]     Checking smallvec v0.6.0
[INFO] [stderr]     Checking quantiles v0.7.0
[INFO] [stderr]     Checking rand v0.3.20
[INFO] [stderr]     Checking memmap v0.6.2
[INFO] [stderr]     Checking owning_ref v0.3.3
[INFO] [stderr]     Checking clap v2.29.1
[INFO] [stderr]     Checking parking_lot_core v0.2.10
[INFO] [stderr]     Checking parking_lot v0.5.3
[INFO] [stderr]  Documenting mmap_comm v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/main.rs:126:58
[INFO] [stdout]     |
[INFO] [stdout] 126 |             total_written += (*control).unflushed_writes;;
[INFO] [stdout]     |                                                          ^ help: remove this semicolon
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.19s
[INFO] running `Command { std: "docker" "inspect" "a714c41f8a11aa6fa821eba88671c10f64012fb8068869df08a818176f7044dd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a714c41f8a11aa6fa821eba88671c10f64012fb8068869df08a818176f7044dd", kill_on_drop: false }`
[INFO] [stdout] a714c41f8a11aa6fa821eba88671c10f64012fb8068869df08a818176f7044dd