[INFO] cloning repository https://github.com/themultiplexer/rust-fft-spectrum
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/themultiplexer/rust-fft-spectrum" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fthemultiplexer%2Frust-fft-spectrum", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fthemultiplexer%2Frust-fft-spectrum'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c0872271d35a0de16eaca62af1fbcbd6c461aa7e
[INFO] documenting themultiplexer/rust-fft-spectrum 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%2Fthemultiplexer%2Frust-fft-spectrum" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/themultiplexer/rust-fft-spectrum 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/themultiplexer/rust-fft-spectrum
[INFO] finished tweaking git repo https://github.com/themultiplexer/rust-fft-spectrum
[INFO] tweaked toml for git repo https://github.com/themultiplexer/rust-fft-spectrum written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/themultiplexer/rust-fft-spectrum 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded nb v0.1.1
[INFO] [stderr]   Downloaded strength_reduce v0.2.1
[INFO] [stderr]   Downloaded i2cdev v0.4.1
[INFO] [stderr]   Downloaded rust_gpiozero v0.1.0
[INFO] [stderr]   Downloaded ads1x1x v0.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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] 1eacf0cee9398ebcafdf3dab3b4dc63d80e57808538f4dda863649ff0a5ceef4
[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" "1eacf0cee9398ebcafdf3dab3b4dc63d80e57808538f4dda863649ff0a5ceef4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1eacf0cee9398ebcafdf3dab3b4dc63d80e57808538f4dda863649ff0a5ceef4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1eacf0cee9398ebcafdf3dab3b4dc63d80e57808538f4dda863649ff0a5ceef4", kill_on_drop: false }`
[INFO] [stdout] 1eacf0cee9398ebcafdf3dab3b4dc63d80e57808538f4dda863649ff0a5ceef4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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] e553c239574450017e146d5f3ee2c683f0085ab06711d28a137b9fe84cb594fb
[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" "e553c239574450017e146d5f3ee2c683f0085ab06711d28a137b9fe84cb594fb", kill_on_drop: false }`
[INFO] [stderr]    Compiling nix v0.10.0
[INFO] [stderr]    Compiling nix v0.11.0
[INFO] [stderr]     Checking nb v0.1.1
[INFO] [stderr]    Compiling num-complex v0.2.1
[INFO] [stderr]     Checking cast v0.2.2
[INFO] [stderr]     Checking strength_reduce v0.2.1
[INFO] [stderr]    Compiling nix v0.6.0
[INFO] [stderr]     Checking iovec v0.1.2
[INFO] [stderr]     Checking num-integer v0.1.39
[INFO] [stderr]     Checking embedded-hal v0.2.2
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]     Checking ads1x1x v0.1.0
[INFO] [stderr]     Checking rustfft v3.0.0
[INFO] [stderr]     Checking spidev v0.3.0
[INFO] [stderr]     Checking i2cdev v0.4.1
[INFO] [stderr]     Checking sysfs_gpio v0.5.3
[INFO] [stderr]     Checking linux-embedded-hal v0.2.2
[INFO] [stderr]     Checking rust_gpiozero v0.1.0
[INFO] [stderr]  Documenting fft v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.77s
[INFO] running `Command { std: "docker" "inspect" "e553c239574450017e146d5f3ee2c683f0085ab06711d28a137b9fe84cb594fb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e553c239574450017e146d5f3ee2c683f0085ab06711d28a137b9fe84cb594fb", kill_on_drop: false }`
[INFO] [stdout] e553c239574450017e146d5f3ee2c683f0085ab06711d28a137b9fe84cb594fb