[INFO] cloning repository https://github.com/alexkirsz/dvirt
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/alexkirsz/dvirt" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falexkirsz%2Fdvirt", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falexkirsz%2Fdvirt'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 884f81be8470947fa81f3fcc830a9a192819a080
[INFO] documenting alexkirsz/dvirt against 1.46.0 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falexkirsz%2Fdvirt" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/alexkirsz/dvirt 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 git repo https://github.com/alexkirsz/dvirt
[INFO] finished tweaking git repo https://github.com/alexkirsz/dvirt
[INFO] tweaked toml for git repo https://github.com/alexkirsz/dvirt written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/alexkirsz/dvirt 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-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] 5c5674378db61cee2c2f3439cb63797a72da48b8f2d0f7c3573f61fbfd0f9f18
[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" "5c5674378db61cee2c2f3439cb63797a72da48b8f2d0f7c3573f61fbfd0f9f18", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5c5674378db61cee2c2f3439cb63797a72da48b8f2d0f7c3573f61fbfd0f9f18", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5c5674378db61cee2c2f3439cb63797a72da48b8f2d0f7c3573f61fbfd0f9f18", kill_on_drop: false }`
[INFO] [stdout] 5c5674378db61cee2c2f3439cb63797a72da48b8f2d0f7c3573f61fbfd0f9f18
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] 3b1f246975a270e25c48c405e98c95916b4e988d2907c5da868b574bb8ef72fb
[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" "3b1f246975a270e25c48c405e98c95916b4e988d2907c5da868b574bb8ef72fb", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking arrayvec v0.5.0
[INFO] [stderr]     Checking groupable v0.2.0
[INFO] [stderr]     Checking route-recognizer v0.1.13
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]     Checking itertools v0.7.11
[INFO] [stderr]     Checking getrandom v0.1.12
[INFO] [stderr]     Checking serde_json v1.0.41
[INFO] [stderr]     Checking mustache v0.9.0
[INFO] [stderr]     Checking png v0.15.0
[INFO] [stderr]     Checking hyper v0.10.16
[INFO] [stderr]     Checking crossbeam-epoch v0.7.2
[INFO] [stderr]     Checking mime_guess v1.8.7
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rusttype v0.8.1
[INFO] [stderr]     Checking crossbeam-deque v0.7.1
[INFO] [stderr]     Checking rand_chacha v0.2.1
[INFO] [stderr]     Checking rand v0.7.2
[INFO] [stderr]     Checking num-iter v0.1.39
[INFO] [stderr]     Checking num-bigint v0.2.3
[INFO] [stderr]     Checking chrono v0.4.9
[INFO] [stderr]     Checking rayon-core v1.6.0
[INFO] [stderr]     Checking num v0.1.42
[INFO] [stderr]     Checking rusttype v0.7.9
[INFO] [stderr]     Checking rulinalg v0.4.2
[INFO] [stderr]     Checking rayon v1.2.0
[INFO] [stderr]     Checking tiny_http v0.6.2
[INFO] [stderr]     Checking iron v0.6.1
[INFO] [stderr]     Checking nickel v0.11.0
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr]     Checking num-rational v0.2.2
[INFO] [stderr]     Checking iron-json-response v0.6.0
[INFO] [stderr]     Checking router v0.6.0
[INFO] [stderr]     Checking num v0.2.0
[INFO] [stderr]     Checking multipart v0.16.1
[INFO] [stderr]     Checking jpeg-decoder v0.1.16
[INFO] [stderr]     Checking image v0.22.3
[INFO] [stderr]     Checking imageproc v0.19.2
[INFO] [stderr]  Documenting dvirt v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 44.57s
[INFO] running `Command { std: "docker" "inspect" "3b1f246975a270e25c48c405e98c95916b4e988d2907c5da868b574bb8ef72fb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3b1f246975a270e25c48c405e98c95916b4e988d2907c5da868b574bb8ef72fb", kill_on_drop: false }`
[INFO] [stdout] 3b1f246975a270e25c48c405e98c95916b4e988d2907c5da868b574bb8ef72fb