[INFO] fetching crate fuse3 0.1.0-beta1.3...
[INFO] documenting fuse3-0.1.0-beta1.3 against 1.46.0 for beta-1.47-rustdoc-1
[INFO] extracting crate fuse3 0.1.0-beta1.3 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate fuse3 0.1.0-beta1.3 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 fuse3 0.1.0-beta1.3
[INFO] finished tweaking crates.io crate fuse3 0.1.0-beta1.3
[INFO] tweaked toml for crates.io crate fuse3 0.1.0-beta1.3 written to /workspace/builds/worker-8/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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] 1d611806a7645e904102dffb06950947cef55d0121cbde91c1bd86d7c40aeab0
[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" "1d611806a7645e904102dffb06950947cef55d0121cbde91c1bd86d7c40aeab0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1d611806a7645e904102dffb06950947cef55d0121cbde91c1bd86d7c40aeab0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1d611806a7645e904102dffb06950947cef55d0121cbde91c1bd86d7c40aeab0", kill_on_drop: false }`
[INFO] [stdout] 1d611806a7645e904102dffb06950947cef55d0121cbde91c1bd86d7c40aeab0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] [stdout] 40bbf4ee1da5bd0c50fa4e843c74eb2de41ec1ad131642c59e0273cf18052ad7
[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" "40bbf4ee1da5bd0c50fa4e843c74eb2de41ec1ad131642c59e0273cf18052ad7", 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v1.0.39
[INFO] [stderr]    Compiling libc v0.2.76
[INFO] [stderr]    Compiling nix v0.17.0
[INFO] [stderr]     Checking futures-sink v0.3.5
[INFO] [stderr]     Checking futures-channel v0.3.5
[INFO] [stderr]    Compiling serde_derive v1.0.115
[INFO] [stderr]    Compiling pin-project-internal v0.4.23
[INFO] [stderr]    Compiling futures-macro v0.3.5
[INFO] [stderr]    Compiling async-trait v0.1.40
[INFO] [stderr]     Checking pin-project v0.4.23
[INFO] [stderr]     Checking futures-util v0.3.5
[INFO] [stderr]     Checking serde v1.0.115
[INFO] [stderr]     Checking bincode v1.3.1
[INFO] [stderr]  Documenting fuse3 v0.1.0-beta1.3 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0277]: `()` is not a future
[INFO] [stdout]   --> src/spawn.rs:16:38
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub fn spawn_blocking<F, T>(f: F) -> impl Future<Output = T>
[INFO] [stdout]    |                                      ^^^^^^^^^^^^^^^^^^^^^^^ `()` is not a future
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `std::future::Future` is not implemented for `()`
[INFO] [stdout]    = note: the return type of a function must have a statically known size
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: Could not document `fuse3`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name fuse3 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 async_trait=/opt/rustwide/target/debug/deps/libasync_trait-502a93331209db90.so --extern bincode=/opt/rustwide/target/debug/deps/libbincode-4bdddaee6eabc356.rmeta --extern futures_channel=/opt/rustwide/target/debug/deps/libfutures_channel-4463640c960c27ca.rmeta --extern futures_util=/opt/rustwide/target/debug/deps/libfutures_util-5c7d7dabfbdda224.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-57a7edc7f441d44c.rmeta --extern libc=/opt/rustwide/target/debug/deps/liblibc-4282d97f04dc73a8.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-75d540134d633bf3.rmeta --extern nix=/opt/rustwide/target/debug/deps/libnix-2200f0c2219320b4.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-99af53deeeec9972.rmeta --cap-lints=warn` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "40bbf4ee1da5bd0c50fa4e843c74eb2de41ec1ad131642c59e0273cf18052ad7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "40bbf4ee1da5bd0c50fa4e843c74eb2de41ec1ad131642c59e0273cf18052ad7", kill_on_drop: false }`
[INFO] [stdout] 40bbf4ee1da5bd0c50fa4e843c74eb2de41ec1ad131642c59e0273cf18052ad7