[INFO] fetching crate ia 0.1.2...
[INFO] documenting ia-0.1.2 against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] extracting crate ia 0.1.2 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate ia 0.1.2 on toolchain beta-2022-05-20
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ia 0.1.2
[INFO] finished tweaking crates.io crate ia 0.1.2
[INFO] tweaked toml for crates.io crate ia 0.1.2 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+beta-2022-05-20" "metadata" "--no-deps" "--format-version=1", 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] 2f4a6e130d0f3f4761fd55d0b346b84dec6293868a3a1ac7a3819d1d2d001b3c
[INFO] running `Command { std: "docker" "start" "-a" "2f4a6e130d0f3f4761fd55d0b346b84dec6293868a3a1ac7a3819d1d2d001b3c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2f4a6e130d0f3f4761fd55d0b346b84dec6293868a3a1ac7a3819d1d2d001b3c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2f4a6e130d0f3f4761fd55d0b346b84dec6293868a3a1ac7a3819d1d2d001b3c", kill_on_drop: false }`
[INFO] [stdout] 2f4a6e130d0f3f4761fd55d0b346b84dec6293868a3a1ac7a3819d1d2d001b3c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+beta-2022-05-20" "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] d1f534f8d58f9882b33e61a3af56de84d355418dbe1d1a9b04bf6bc4ae603917
[INFO] running `Command { std: "docker" "start" "-a" "d1f534f8d58f9882b33e61a3af56de84d355418dbe1d1a9b04bf6bc4ae603917", kill_on_drop: false }`
[INFO] [stderr]  Documenting ia v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0432]: unresolved import `std::boxed::FnBox`
[INFO] [stdout]   --> src/raw.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | use std::boxed::FnBox;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^ no `FnBox` in `boxed`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: the `!` type is experimental
[INFO] [stdout]  --> src/executor.rs:7:51
[INFO] [stdout]   |
[INFO] [stdout] 7 |     fut: UnsafeCell<Box<Future<Item = (), Error = !> + 'static>>
[INFO] [stdout]   |                                                   ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: see issue #35121 <https://github.com/rust-lang/rust/issues/35121> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: the `!` type is experimental
[INFO] [stdout]   --> src/executor.rs:11:47
[INFO] [stdout]    |
[INFO] [stdout] 11 |     fn new(fut: Box<Future<Item = (), Error = !> + 'static>) -> TaskInfo {
[INFO] [stdout]    |                                               ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #35121 <https://github.com/rust-lang/rust/issues/35121> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: the `!` type is experimental
[INFO] [stdout]   --> src/executor.rs:17:64
[INFO] [stdout]    |
[INFO] [stdout] 17 |     fn get_future(&self) -> &mut Box<Future<Item = (), Error = !> + 'static> {
[INFO] [stdout]    |                                                                ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #35121 <https://github.com/rust-lang/rust/issues/35121> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: the `!` type is experimental
[INFO] [stdout]   --> src/utils.rs:14:18
[INFO] [stdout]    |
[INFO] [stdout] 14 |     type Error = !;
[INFO] [stdout]    |                  ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #35121 <https://github.com/rust-lang/rust/issues/35121> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: the `!` type is experimental
[INFO] [stdout]   --> src/utils.rs:18:28
[INFO] [stdout]    |
[INFO] [stdout] 18 |     ) -> Result<Async<()>, !> {
[INFO] [stdout]    |                            ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #35121 <https://github.com/rust-lang/rust/issues/35121> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: the `!` type is experimental
[INFO] [stdout]   --> src/net.rs:18:18
[INFO] [stdout]    |
[INFO] [stdout] 18 |     type Error = !;
[INFO] [stdout]    |                  ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #35121 <https://github.com/rust-lang/rust/issues/35121> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: the `!` type is experimental
[INFO] [stdout]   --> src/net.rs:22:47
[INFO] [stdout]    |
[INFO] [stdout] 22 |     ) -> Result<Async<Option<TcpConnection>>, !> {
[INFO] [stdout]    |                                               ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #35121 <https://github.com/rust-lang/rust/issues/35121> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 9 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0432, E0658.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `ia`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type lib --crate-name ia src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=b39cb7e2c285d372 -L dependency=/opt/rustwide/target/debug/deps --extern futures=/opt/rustwide/target/debug/deps/libfutures-5fb8330047908de9.rmeta --cap-lints=warn --crate-version 0.1.2` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "d1f534f8d58f9882b33e61a3af56de84d355418dbe1d1a9b04bf6bc4ae603917", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d1f534f8d58f9882b33e61a3af56de84d355418dbe1d1a9b04bf6bc4ae603917", kill_on_drop: false }`
[INFO] [stdout] d1f534f8d58f9882b33e61a3af56de84d355418dbe1d1a9b04bf6bc4ae603917