[INFO] cloning repository https://github.com/mvlabat/ud2
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mvlabat/ud2" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmvlabat%2Fud2", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmvlabat%2Fud2'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d02f0111f078a6034d6caca8f1429a0b5713a297
[INFO] documenting mvlabat/ud2 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%2Fmvlabat%2Fud2" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mvlabat/ud2 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/mvlabat/ud2
[INFO] finished tweaking git repo https://github.com/mvlabat/ud2
[INFO] tweaked toml for git repo https://github.com/mvlabat/ud2 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/mvlabat/ud2 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] warning: the cargo feature `profile-overrides` is now stable and is no longer necessary to be listed in the manifest
[INFO] [stderr] warning: unused manifest key: profile.dev.overrides
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded shred v0.7.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] a7bb4025707050df29b7a0dd8325a839608e6ec87c43f3a4e4060afdf133425e
[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" "a7bb4025707050df29b7a0dd8325a839608e6ec87c43f3a4e4060afdf133425e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a7bb4025707050df29b7a0dd8325a839608e6ec87c43f3a4e4060afdf133425e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a7bb4025707050df29b7a0dd8325a839608e6ec87c43f3a4e4060afdf133425e", kill_on_drop: false }`
[INFO] [stdout] a7bb4025707050df29b7a0dd8325a839608e6ec87c43f3a4e4060afdf133425e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] e836475cad71c2fe0236e637301e051a1e0977d5275f4f003d08c7b03b9645b3
[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" "e836475cad71c2fe0236e637301e051a1e0977d5275f4f003d08c7b03b9645b3", kill_on_drop: false }`
[INFO] [stderr] warning: the cargo feature `profile-overrides` is now stable and is no longer necessary to be listed in the manifest
[INFO] [stderr] warning: unused manifest key: profile.dev.overrides
[INFO] [stderr]    Compiling arrayvec v0.4.11
[INFO] [stderr]    Compiling rayon-core v1.5.0
[INFO] [stderr]    Compiling syn v0.15.42
[INFO] [stderr]    Compiling nonzero_signed v1.0.3
[INFO] [stderr]     Checking atom v0.3.5
[INFO] [stderr]     Checking mopa v0.2.2
[INFO] [stderr]     Checking tuple_utils v0.2.0
[INFO] [stderr]     Checking futures v0.1.28
[INFO] [stderr]     Checking shrev v1.1.1
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking crossbeam-utils v0.6.6
[INFO] [stderr]     Checking rand v0.5.6
[INFO] [stderr]     Checking crossbeam-queue v0.1.2
[INFO] [stderr]     Checking crossbeam-epoch v0.7.2
[INFO] [stderr]     Checking crossbeam-epoch v0.5.2
[INFO] [stderr]     Checking crossbeam-epoch v0.6.1
[INFO] [stderr]     Checking crossbeam-deque v0.5.2
[INFO] [stderr]     Checking crossbeam-deque v0.6.3
[INFO] [stderr]     Checking parking_lot_core v0.3.1
[INFO] [stderr]     Checking parking_lot v0.6.4
[INFO] [stderr]     Checking rayon v1.1.0
[INFO] [stderr]     Checking crossbeam-channel v0.2.6
[INFO] [stderr]     Checking crossbeam v0.4.1
[INFO] [stderr]     Checking hibitset v0.5.4
[INFO] [stderr]     Checking shred v0.7.2
[INFO] [stderr]    Compiling derivative v1.0.2
[INFO] [stderr]    Compiling shred-derive v0.5.1
[INFO] [stderr]     Checking specs v0.14.3
[INFO] [stderr]  Documenting ud2 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 38.11s
[INFO] running `Command { std: "docker" "inspect" "e836475cad71c2fe0236e637301e051a1e0977d5275f4f003d08c7b03b9645b3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e836475cad71c2fe0236e637301e051a1e0977d5275f4f003d08c7b03b9645b3", kill_on_drop: false }`
[INFO] [stdout] e836475cad71c2fe0236e637301e051a1e0977d5275f4f003d08c7b03b9645b3