[INFO] fetching crate heng_rs 0.1.0...
[INFO] documenting heng_rs-0.1.0 against 1.46.0 for beta-1.47-rustdoc-1
[INFO] extracting crate heng_rs 0.1.0 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate heng_rs 0.1.0 on toolchain 1.46.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate heng_rs 0.1.0
[INFO] finished tweaking crates.io crate heng_rs 0.1.0
[INFO] tweaked toml for crates.io crate heng_rs 0.1.0 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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" "+1.46.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3c68917cb2e03fb7e0bb9d38a72d3d995c269e5dbda26450900c991cb6655cbd
[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" "3c68917cb2e03fb7e0bb9d38a72d3d995c269e5dbda26450900c991cb6655cbd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3c68917cb2e03fb7e0bb9d38a72d3d995c269e5dbda26450900c991cb6655cbd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3c68917cb2e03fb7e0bb9d38a72d3d995c269e5dbda26450900c991cb6655cbd", kill_on_drop: false }`
[INFO] [stdout] 3c68917cb2e03fb7e0bb9d38a72d3d995c269e5dbda26450900c991cb6655cbd
[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" "+1.46.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] d1a1ca83bcf91894fcdd4b474092c0e3a68c5607652800ce4b183885e4b03acc
[INFO] running `Command { std: "docker" "start" "-a" "d1a1ca83bcf91894fcdd4b474092c0e3a68c5607652800ce4b183885e4b03acc", kill_on_drop: false }`
[INFO] [stderr]     Checking futures-sink-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking futures-core-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking futures-channel-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking futures-util-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking tokio-executor v0.2.0-alpha.6
[INFO] [stderr]     Checking tokio-sync v0.2.0-alpha.6
[INFO] [stderr]     Checking tokio-timer v0.3.0-alpha.6
[INFO] [stderr]  Documenting heng_rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0432]: unresolved import `futures_util::SinkExt`
[INFO] [stdout]   --> src/lib.rs:51:20
[INFO] [stdout]    |
[INFO] [stdout] 51 | use futures_util::{SinkExt, StreamExt};
[INFO] [stdout]    |                    ^^^^^^^ no `SinkExt` in the root
[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 E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: Could not document `heng_rs`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name heng_rs 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 futures_channel=/opt/rustwide/target/debug/deps/libfutures_channel-b1fedbd494788a36.rmeta --extern futures_util=/opt/rustwide/target/debug/deps/libfutures_util-6d71f1ec0d87865a.rmeta --extern tokio_executor=/opt/rustwide/target/debug/deps/libtokio_executor-65778e486590c59a.rmeta --extern tokio_timer=/opt/rustwide/target/debug/deps/libtokio_timer-881a805937101c96.rmeta --cap-lints=warn` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "d1a1ca83bcf91894fcdd4b474092c0e3a68c5607652800ce4b183885e4b03acc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d1a1ca83bcf91894fcdd4b474092c0e3a68c5607652800ce4b183885e4b03acc", kill_on_drop: false }`
[INFO] [stdout] d1a1ca83bcf91894fcdd4b474092c0e3a68c5607652800ce4b183885e4b03acc