[INFO] cloning repository https://github.com/olafurjohannsson/rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/olafurjohannsson/rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Folafurjohannsson%2Frust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Folafurjohannsson%2Frust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 929c7d73d08f34d69534ab3e6f6c6b50c1b49d15
[INFO] documenting olafurjohannsson/rust 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%2Folafurjohannsson%2Frust" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/olafurjohannsson/rust 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/olafurjohannsson/rust
[INFO] finished tweaking git repo https://github.com/olafurjohannsson/rust
[INFO] tweaked toml for git repo https://github.com/olafurjohannsson/rust written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/olafurjohannsson/rust 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] error: the lock file /workspace/builds/worker-2/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag.
[INFO] the lockfile is outdated, regenerating it
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded bitflags v0.4.0
[INFO] [stderr]   Downloaded mio v0.5.1
[INFO] [stderr]   Downloaded nix v0.5.1
[INFO] [stderr]   Downloaded miow v0.1.5
[INFO] [stderr]   Downloaded bytes v0.3.0
[INFO] [stderr]   Downloaded slab v0.1.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] f23c51245f90d4380f8a46bc5c21d83f56e096b2d8df7aa2af5a8f27edb650ed
[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" "f23c51245f90d4380f8a46bc5c21d83f56e096b2d8df7aa2af5a8f27edb650ed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f23c51245f90d4380f8a46bc5c21d83f56e096b2d8df7aa2af5a8f27edb650ed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f23c51245f90d4380f8a46bc5c21d83f56e096b2d8df7aa2af5a8f27edb650ed", kill_on_drop: false }`
[INFO] [stdout] f23c51245f90d4380f8a46bc5c21d83f56e096b2d8df7aa2af5a8f27edb650ed
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] f08be7516e85cc1a2df24897482e0dbd65d566b6f1abb90243c0f78d72c3244c
[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" "f08be7516e85cc1a2df24897482e0dbd65d566b6f1abb90243c0f78d72c3244c", kill_on_drop: false }`
[INFO] [stderr]     Checking bitflags v0.4.0
[INFO] [stderr]     Checking slab v0.1.3
[INFO] [stderr]     Checking bytes v0.3.0
[INFO] [stderr]    Compiling ws2_32-sys v0.2.1
[INFO] [stderr]     Checking net2 v0.2.34
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]     Checking nix v0.5.1
[INFO] [stderr]     Checking miow v0.1.5
[INFO] [stderr]     Checking mio v0.5.1
[INFO] [stderr]  Documenting main v0.0.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.85s
[INFO] running `Command { std: "docker" "inspect" "f08be7516e85cc1a2df24897482e0dbd65d566b6f1abb90243c0f78d72c3244c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f08be7516e85cc1a2df24897482e0dbd65d566b6f1abb90243c0f78d72c3244c", kill_on_drop: false }`
[INFO] [stdout] f08be7516e85cc1a2df24897482e0dbd65d566b6f1abb90243c0f78d72c3244c