[INFO] cloning repository https://github.com/oliverlee/capgains
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/oliverlee/capgains" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Foliverlee%2Fcapgains", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Foliverlee%2Fcapgains'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 53367d9dfc37a2c7da8fe61ccb91c09b6c504903
[INFO] documenting oliverlee/capgains 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%2Foliverlee%2Fcapgains" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/oliverlee/capgains 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/oliverlee/capgains
[INFO] finished tweaking git repo https://github.com/oliverlee/capgains
[INFO] tweaked toml for git repo https://github.com/oliverlee/capgains written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/oliverlee/capgains 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 quote v0.6.2
[INFO] [stderr]   Downloaded num-integer v0.1.38
[INFO] [stderr]   Downloaded serde v1.0.60
[INFO] [stderr]   Downloaded chrono v0.4.2
[INFO] [stderr]   Downloaded serde_derive v1.0.60
[INFO] [stderr]   Downloaded proc-macro2 v0.4.3
[INFO] [stderr]   Downloaded syn v0.14.0
[INFO] [stderr]   Downloaded num-traits v0.2.4
[INFO] [stderr]   Downloaded redox_syscall v0.1.38
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] e1a591ee4301a000172b94a8ba1f3579c3d5540ebd9164615c980e9acd28c872
[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" "e1a591ee4301a000172b94a8ba1f3579c3d5540ebd9164615c980e9acd28c872", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e1a591ee4301a000172b94a8ba1f3579c3d5540ebd9164615c980e9acd28c872", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e1a591ee4301a000172b94a8ba1f3579c3d5540ebd9164615c980e9acd28c872", kill_on_drop: false }`
[INFO] [stdout] e1a591ee4301a000172b94a8ba1f3579c3d5540ebd9164615c980e9acd28c872
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] db5283baa9b3b257063513dd0b97e81fa8b92c3441cf41b89c1ea0c0b1138eb4
[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" "db5283baa9b3b257063513dd0b97e81fa8b92c3441cf41b89c1ea0c0b1138eb4", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.41
[INFO] [stderr]    Compiling num-traits v0.2.4
[INFO] [stderr]    Compiling serde v1.0.60
[INFO] [stderr]    Compiling num-integer v0.1.38
[INFO] [stderr]    Compiling proc-macro2 v0.4.3
[INFO] [stderr]     Checking memchr v2.0.1
[INFO] [stderr]     Checking time v0.1.40
[INFO] [stderr]    Compiling quote v0.6.2
[INFO] [stderr]    Compiling syn v0.14.0
[INFO] [stderr]     Checking csv-core v0.1.4
[INFO] [stderr]     Checking chrono v0.4.2
[INFO] [stderr]    Compiling serde_derive v1.0.60
[INFO] [stderr]     Checking csv v1.0.0
[INFO] [stderr]  Documenting capgains v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(map_get_key_value)]
[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 `capgains`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name capgains src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern chrono=/opt/rustwide/target/debug/deps/libchrono-7633b82fcf9f99b7.rmeta --extern csv=/opt/rustwide/target/debug/deps/libcsv-689fd5ba273d13ed.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-1acfeeda9f13b804.rmeta --extern serde_derive=/opt/rustwide/target/debug/deps/libserde_derive-a49c605f84a52608.so --cap-lints=warn --crate-version 0.1.0` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "db5283baa9b3b257063513dd0b97e81fa8b92c3441cf41b89c1ea0c0b1138eb4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "db5283baa9b3b257063513dd0b97e81fa8b92c3441cf41b89c1ea0c0b1138eb4", kill_on_drop: false }`
[INFO] [stdout] db5283baa9b3b257063513dd0b97e81fa8b92c3441cf41b89c1ea0c0b1138eb4