[INFO] fetching crate prometheus_exporter_base 0.31.0...
[INFO] documenting prometheus_exporter_base-0.31.0 against 1.46.0 for beta-1.47-rustdoc-1
[INFO] extracting crate prometheus_exporter_base 0.31.0 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate prometheus_exporter_base 0.31.0 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 crates.io crate prometheus_exporter_base 0.31.0
[INFO] finished tweaking crates.io crate prometheus_exporter_base 0.31.0
[INFO] tweaked toml for crates.io crate prometheus_exporter_base 0.31.0 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate crates.io crate prometheus_exporter_base 0.31.0 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] 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" "+1.46.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 064632140a905e1d1419a45ab45da50010d7e9a19d8d7dbcb519b5f5ca30a845
[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" "064632140a905e1d1419a45ab45da50010d7e9a19d8d7dbcb519b5f5ca30a845", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "064632140a905e1d1419a45ab45da50010d7e9a19d8d7dbcb519b5f5ca30a845", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "064632140a905e1d1419a45ab45da50010d7e9a19d8d7dbcb519b5f5ca30a845", kill_on_drop: false }`
[INFO] [stdout] 064632140a905e1d1419a45ab45da50010d7e9a19d8d7dbcb519b5f5ca30a845
[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" "+1.46.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3f0c3843fb55db823e4a34013110f82370fdf7096a2c955802de0672b9189447
[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" "3f0c3843fb55db823e4a34013110f82370fdf7096a2c955802de0672b9189447", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.19
[INFO] [stderr]    Compiling backtrace-sys v0.1.37
[INFO] [stderr]     Checking futures-task v0.3.5
[INFO] [stderr]     Checking mio v0.6.22
[INFO] [stderr]     Checking rustls v0.17.0
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]     Checking backtrace v0.3.46
[INFO] [stderr]     Checking rustls-native-certs v0.3.0
[INFO] [stderr]    Compiling synstructure v0.12.3
[INFO] [stderr]    Compiling tokio-macros v0.2.5
[INFO] [stderr]    Compiling pin-project-internal v0.4.15
[INFO] [stderr]    Compiling futures-macro v0.3.5
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]     Checking tokio v0.2.20
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking pin-project v0.4.15
[INFO] [stderr]     Checking futures-util v0.3.5
[INFO] [stderr]     Checking tokio-util v0.3.1
[INFO] [stderr]     Checking tokio-rustls v0.13.0
[INFO] [stderr]     Checking h2 v0.2.5
[INFO] [stderr]     Checking hyper v0.13.5
[INFO] [stderr]     Checking hyper-rustls v0.20.0
[INFO] [stderr]  Documenting prometheus_exporter_base v0.31.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 00s
[INFO] running `Command { std: "docker" "inspect" "3f0c3843fb55db823e4a34013110f82370fdf7096a2c955802de0672b9189447", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3f0c3843fb55db823e4a34013110f82370fdf7096a2c955802de0672b9189447", kill_on_drop: false }`
[INFO] [stdout] 3f0c3843fb55db823e4a34013110f82370fdf7096a2c955802de0672b9189447