[INFO] cloning repository https://github.com/backtozero/sensors
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/backtozero/sensors" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbacktozero%2Fsensors", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbacktozero%2Fsensors'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c9921f3425698ad2a19a08e60186476d52c85103
[INFO] documenting backtozero/sensors 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%2Fbacktozero%2Fsensors" "/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/backtozero/sensors 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/backtozero/sensors
[INFO] finished tweaking git repo https://github.com/backtozero/sensors
[INFO] tweaked toml for git repo https://github.com/backtozero/sensors written to /workspace/builds/worker-12/source/Cargo.toml
[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] [stderr]     Updating git repository `https://github.com/martindeegan/i2cdev-sensors.git`
[INFO] [stderr]     Updating git repository `https://github.com/backtozero/i2cdev-sensors.git`
[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 i2csensors v0.1.3
[INFO] [stderr]   Downloaded i2cdev v0.3.2
[INFO] [stderr]   Downloaded nix v0.10.0
[INFO] [stderr]   Downloaded i2cdev v0.4.4
[INFO] [stderr]   Downloaded pca9685 v0.1.0
[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" "+beta-2020-08-29" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4844be9d5f76ac7b4ebdd4b4c5983d08df9e124627a7293aaef806ac20fe274b
[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" "4844be9d5f76ac7b4ebdd4b4c5983d08df9e124627a7293aaef806ac20fe274b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4844be9d5f76ac7b4ebdd4b4c5983d08df9e124627a7293aaef806ac20fe274b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4844be9d5f76ac7b4ebdd4b4c5983d08df9e124627a7293aaef806ac20fe274b", kill_on_drop: false }`
[INFO] [stdout] 4844be9d5f76ac7b4ebdd4b4c5983d08df9e124627a7293aaef806ac20fe274b
[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" "+beta-2020-08-29" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e9b07158da1a28c8267b242424a6eca6e004bbc28f170e86f4058c971b1de396
[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" "e9b07158da1a28c8267b242424a6eca6e004bbc28f170e86f4058c971b1de396", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking i2csensors v0.1.3
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling error-chain v0.12.4
[INFO] [stderr]     Checking nix v0.10.0
[INFO] [stderr]     Checking i2cdev v0.4.4
[INFO] [stderr]    Compiling cargo_metadata v0.6.4
[INFO] [stderr]     Checking i2cdev-bmp280 v0.1.4 (https://github.com/martindeegan/i2cdev-sensors.git?branch=master#eb5c759a)
[INFO] [stderr]     Checking i2cdev-l3gd20 v0.1.3 (https://github.com/martindeegan/i2cdev-sensors.git?branch=master#eb5c759a)
[INFO] [stderr]    Compiling tempdir v0.3.7
[INFO] [stderr]    Compiling skeptic v0.13.4
[INFO] [stderr]    Compiling i2cdev v0.3.2
[INFO] [stderr]     Checking pca9685 v0.1.0
[INFO] [stderr]     Checking i2cdev-lsm9ds0 v0.1.3 (https://github.com/backtozero/i2cdev-sensors.git?branch=master#47928c36)
[INFO] [stderr]  Documenting bmp v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 20.57s
[INFO] running `Command { std: "docker" "inspect" "e9b07158da1a28c8267b242424a6eca6e004bbc28f170e86f4058c971b1de396", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e9b07158da1a28c8267b242424a6eca6e004bbc28f170e86f4058c971b1de396", kill_on_drop: false }`
[INFO] [stdout] e9b07158da1a28c8267b242424a6eca6e004bbc28f170e86f4058c971b1de396