[INFO] fetching crate ak-rt 0.1.1...
[INFO] documenting ak-rt-0.1.1 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] extracting crate ak-rt 0.1.1 into /workspace/builds/worker-93/source
[INFO] validating manifest of crates.io crate ak-rt 0.1.1 on toolchain 1.61.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ak-rt 0.1.1
[INFO] finished tweaking crates.io crate ak-rt 0.1.1
[INFO] tweaked toml for crates.io crate ak-rt 0.1.1 written to /workspace/builds/worker-93/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-93/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-93/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6e65eca339ae4bb98df99335132e2f4be44e3d2291efa1c3ed4a41a1d2f01e13
[INFO] running `Command { std: "docker" "start" "-a" "6e65eca339ae4bb98df99335132e2f4be44e3d2291efa1c3ed4a41a1d2f01e13", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6e65eca339ae4bb98df99335132e2f4be44e3d2291efa1c3ed4a41a1d2f01e13", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6e65eca339ae4bb98df99335132e2f4be44e3d2291efa1c3ed4a41a1d2f01e13", kill_on_drop: false }`
[INFO] [stdout] 6e65eca339ae4bb98df99335132e2f4be44e3d2291efa1c3ed4a41a1d2f01e13
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-93/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-93/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3b2ead78df06a8e68a1c0294776cbc4f95acd672e638df3171c51f365157e718
[INFO] running `Command { std: "docker" "start" "-a" "3b2ead78df06a8e68a1c0294776cbc4f95acd672e638df3171c51f365157e718", kill_on_drop: false }`
[INFO] [stderr]     Checking futures-core-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking slab v0.4.6
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]     Checking pin-project-lite v0.1.12
[INFO] [stderr]     Checking bytes v0.5.6
[INFO] [stderr]     Checking futures-channel-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking tokio v0.2.25
[INFO] [stderr]     Checking futures-util-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking tokio-executor v0.2.0-alpha.6
[INFO] [stderr]  Documenting ak-rt v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0432]: unresolved import `tokio::prelude::Future`
[INFO] [stdout]  --> src/lib.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use tokio::prelude::Future;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^ no `Future` in `prelude`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `tokio::spawn`
[INFO] [stdout]  --> src/lib.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use tokio::spawn;
[INFO] [stdout]   |     ^^^^^^^^^^^^ no `spawn` in the root
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 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 `ak-rt`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name ak_rt src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=460756cf9f7ac188 -L dependency=/opt/rustwide/target/debug/deps --extern tokio=/opt/rustwide/target/debug/deps/libtokio-b5048613fc5abb4c.rmeta --extern tokio_executor=/opt/rustwide/target/debug/deps/libtokio_executor-a40ca79fd27c0f1d.rmeta --cap-lints=warn --crate-version 0.1.1` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "3b2ead78df06a8e68a1c0294776cbc4f95acd672e638df3171c51f365157e718", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3b2ead78df06a8e68a1c0294776cbc4f95acd672e638df3171c51f365157e718", kill_on_drop: false }`
[INFO] [stdout] 3b2ead78df06a8e68a1c0294776cbc4f95acd672e638df3171c51f365157e718