[INFO] cloning repository https://github.com/golddranks/kadouchi
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/golddranks/kadouchi" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgolddranks%2Fkadouchi", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgolddranks%2Fkadouchi'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3b230bae30f046fc427ef4cac3f919cb7c0bc1a9
[INFO] documenting golddranks/kadouchi 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%2Fgolddranks%2Fkadouchi" "/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/golddranks/kadouchi 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/golddranks/kadouchi
[INFO] finished tweaking git repo https://github.com/golddranks/kadouchi
[INFO] tweaked toml for git repo https://github.com/golddranks/kadouchi written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/golddranks/kadouchi 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]     Updating git repository `https://github.com/golddranks/scoped_stack`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded termcolor v0.3.6
[INFO] [stderr]   Downloaded failure_derive v0.1.1
[INFO] [stderr]   Downloaded failure v0.1.1
[INFO] [stderr]   Downloaded backtrace v0.3.8
[INFO] [stderr]   Downloaded atty v0.2.10
[INFO] [stderr]   Downloaded nom v4.0.0
[INFO] [stderr]   Downloaded regex v1.0.0
[INFO] [stderr]   Downloaded backtrace-sys v0.1.23
[INFO] [stderr]   Downloaded lazy_static v1.0.1
[INFO] [stderr]   Downloaded rustc-demangle v0.1.8
[INFO] [stderr]   Downloaded synstructure v0.6.1
[INFO] [stderr]   Downloaded wincolor v0.1.6
[INFO] [stderr]   Downloaded cc v1.0.17
[INFO] [stderr]   Downloaded regex-syntax v0.6.0
[INFO] [stderr]   Downloaded env_logger v0.5.10
[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] 3b2779843f7436741b2e67b8820454864c8e21858cbab36ca50fdc837755af39
[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" "3b2779843f7436741b2e67b8820454864c8e21858cbab36ca50fdc837755af39", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3b2779843f7436741b2e67b8820454864c8e21858cbab36ca50fdc837755af39", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3b2779843f7436741b2e67b8820454864c8e21858cbab36ca50fdc837755af39", kill_on_drop: false }`
[INFO] [stdout] 3b2779843f7436741b2e67b8820454864c8e21858cbab36ca50fdc837755af39
[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] bbbdae1eafe99f7dcb3cc9e2553a7a71b945af4092c3fdf6f15c32a934b3e9c9
[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" "bbbdae1eafe99f7dcb3cc9e2553a7a71b945af4092c3fdf6f15c32a934b3e9c9", 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]     Checking libc v0.2.42
[INFO] [stderr]    Compiling cc v1.0.17
[INFO] [stderr]     Checking cfg-if v0.1.3
[INFO] [stderr]    Compiling regex v1.0.0
[INFO] [stderr]     Checking lazy_static v1.0.1
[INFO] [stderr]     Checking rustc-demangle v0.1.8
[INFO] [stderr]     Checking termcolor v0.3.6
[INFO] [stderr]     Checking scoped_stack v0.1.0 (https://github.com/golddranks/scoped_stack#0cbf7808)
[INFO] [stderr]     Checking humantime v1.1.1
[INFO] [stderr]     Checking regex-syntax v0.6.0
[INFO] [stderr]    Compiling synstructure v0.6.1
[INFO] [stderr]     Checking log v0.4.1
[INFO] [stderr]     Checking thread_local v0.3.5
[INFO] [stderr]     Checking memchr v2.0.1
[INFO] [stderr]     Checking atty v0.2.10
[INFO] [stderr]    Compiling failure_derive v0.1.1
[INFO] [stderr]     Checking aho-corasick v0.6.4
[INFO] [stderr]     Checking nom v4.0.0
[INFO] [stderr]    Compiling backtrace-sys v0.1.23
[INFO] [stderr]    Compiling libloading v0.5.0
[INFO] [stderr]     Checking backtrace v0.3.8
[INFO] [stderr]     Checking failure v0.1.1
[INFO] [stderr]     Checking env_logger v0.5.10
[INFO] [stderr]  Documenting kadouchi v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(nll)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: Could not document `kadouchi`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type lib --crate-name kadouchi src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern env_logger=/opt/rustwide/target/debug/deps/libenv_logger-58a765a79c81e518.rmeta --extern failure=/opt/rustwide/target/debug/deps/libfailure-6eb0a03e858dc70c.rmeta --extern libloading=/opt/rustwide/target/debug/deps/liblibloading-f1f21b4aee97a1d6.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-5cddd01409ed33c7.rmeta --extern nom=/opt/rustwide/target/debug/deps/libnom-1fb1795c76a43c2e.rmeta --extern regex=/opt/rustwide/target/debug/deps/libregex-e03c180e59e34a8b.rmeta --extern scoped_stack=/opt/rustwide/target/debug/deps/libscoped_stack-e1e3ddf36cedfde2.rmeta --cap-lints=warn --crate-version 0.1.0` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "bbbdae1eafe99f7dcb3cc9e2553a7a71b945af4092c3fdf6f15c32a934b3e9c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bbbdae1eafe99f7dcb3cc9e2553a7a71b945af4092c3fdf6f15c32a934b3e9c9", kill_on_drop: false }`
[INFO] [stdout] bbbdae1eafe99f7dcb3cc9e2553a7a71b945af4092c3fdf6f15c32a934b3e9c9