[INFO] fetching crate metrics-exporter-tcp 0.1.0-alpha.2...
[INFO] documenting metrics-exporter-tcp-0.1.0-alpha.2 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate metrics-exporter-tcp 0.1.0-alpha.2 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate metrics-exporter-tcp 0.1.0-alpha.2 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 crates.io crate metrics-exporter-tcp 0.1.0-alpha.2
[INFO] finished tweaking crates.io crate metrics-exporter-tcp 0.1.0-alpha.2
[INFO] tweaked toml for crates.io crate metrics-exporter-tcp 0.1.0-alpha.2 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate metrics-exporter-tcp 0.1.0-alpha.2 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 quanta v0.5.2
[INFO] [stderr]   Downloaded metrics-util v0.4.0-alpha.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] d67138d87263fc3dabcf284e67d74b4e84dff68ed8aa3dfdc16fa562dc775e0a
[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" "d67138d87263fc3dabcf284e67d74b4e84dff68ed8aa3dfdc16fa562dc775e0a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d67138d87263fc3dabcf284e67d74b4e84dff68ed8aa3dfdc16fa562dc775e0a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d67138d87263fc3dabcf284e67d74b4e84dff68ed8aa3dfdc16fa562dc775e0a", kill_on_drop: false }`
[INFO] [stdout] d67138d87263fc3dabcf284e67d74b4e84dff68ed8aa3dfdc16fa562dc775e0a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] 49622e6acfde5e0063561afe6002e4d045631684d93a9601c6f4af625966cb11
[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" "49622e6acfde5e0063561afe6002e4d045631684d93a9601c6f4af625966cb11", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v1.0.35
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling tinyvec v0.3.3
[INFO] [stderr]    Compiling fixedbitset v0.1.9
[INFO] [stderr]    Compiling metrics v0.13.0-alpha.3
[INFO] [stderr]    Compiling multimap v0.4.0
[INFO] [stderr]    Compiling miniz_oxide v0.4.0
[INFO] [stderr]    Compiling im v14.3.0
[INFO] [stderr]    Compiling iovec v0.1.4
[INFO] [stderr]    Compiling time v0.1.43
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling serde v1.0.114
[INFO] [stderr]     Checking bitmaps v2.1.0
[INFO] [stderr]     Checking parking_lot_core v0.7.2
[INFO] [stderr]     Checking mio v0.7.0
[INFO] [stderr]    Compiling libz-sys v1.0.25
[INFO] [stderr]    Compiling libgit2-sys v0.9.2
[INFO] [stderr]    Compiling bytes v0.4.12
[INFO] [stderr]     Checking rand_xoshiro v0.4.0
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling petgraph v0.4.13
[INFO] [stderr]    Compiling unicode-normalization v0.1.13
[INFO] [stderr]    Compiling chrono v0.4.13
[INFO] [stderr]     Checking parking_lot v0.10.2
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling backtrace v0.3.50
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling idna v0.2.0
[INFO] [stderr]    Compiling failure v0.1.8
[INFO] [stderr]    Compiling url v2.1.1
[INFO] [stderr]    Compiling which v2.0.1
[INFO] [stderr]    Compiling prost-build v0.5.0
[INFO] [stderr]     Checking sized-chunks v0.5.3
[INFO] [stderr]    Compiling tempfile v3.1.0
[INFO] [stderr]    Compiling git2 v0.10.2
[INFO] [stderr]    Compiling prost-derive v0.5.0
[INFO] [stderr]    Compiling toml v0.5.6
[INFO] [stderr]    Compiling built v0.3.2
[INFO] [stderr]    Compiling rustversion v1.0.3
[INFO] [stderr]    Compiling prost-derive v0.6.1
[INFO] [stderr]    Compiling tracing-attributes v0.1.9
[INFO] [stderr]    Compiling prost v0.5.0
[INFO] [stderr]    Compiling prost-types v0.5.0
[INFO] [stderr]    Compiling metrics-macros v0.1.0-alpha.2
[INFO] [stderr]     Checking tracing v0.1.17
[INFO] [stderr]     Checking prost v0.6.1
[INFO] [stderr]     Checking metrics-util v0.4.0-alpha.2
[INFO] [stderr]    Compiling metrics-exporter-tcp v0.1.0-alpha.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking prost-types v0.6.1
[INFO] [stderr]  Documenting metrics-exporter-tcp v0.1.0-alpha.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 27s
[INFO] running `Command { std: "docker" "inspect" "49622e6acfde5e0063561afe6002e4d045631684d93a9601c6f4af625966cb11", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "49622e6acfde5e0063561afe6002e4d045631684d93a9601c6f4af625966cb11", kill_on_drop: false }`
[INFO] [stdout] 49622e6acfde5e0063561afe6002e4d045631684d93a9601c6f4af625966cb11