[INFO] fetching crate slaballoc 0.1.0...
[INFO] documenting slaballoc-0.1.0 against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] extracting crate slaballoc 0.1.0 into /workspace/builds/worker-36/source
[INFO] validating manifest of crates.io crate slaballoc 0.1.0 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 slaballoc 0.1.0
[INFO] finished tweaking crates.io crate slaballoc 0.1.0
[INFO] tweaked toml for crates.io crate slaballoc 0.1.0 written to /workspace/builds/worker-36/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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "fetch" "--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-36/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-36/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] [stdout] 5bf981daf615320118cc55a0c9aa5e66dda088b35e09175263a369bbdf9c325c
[INFO] running `Command { std: "docker" "start" "-a" "5bf981daf615320118cc55a0c9aa5e66dda088b35e09175263a369bbdf9c325c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5bf981daf615320118cc55a0c9aa5e66dda088b35e09175263a369bbdf9c325c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5bf981daf615320118cc55a0c9aa5e66dda088b35e09175263a369bbdf9c325c", kill_on_drop: false }`
[INFO] [stdout] 5bf981daf615320118cc55a0c9aa5e66dda088b35e09175263a369bbdf9c325c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-36/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-36/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] [stdout] 2042678eaaa6698ef4aa33374654f11b98fd121db63fe5d2d74e5cfd014c0ff6
[INFO] running `Command { std: "docker" "start" "-a" "2042678eaaa6698ef4aa33374654f11b98fd121db63fe5d2d74e5cfd014c0ff6", kill_on_drop: false }`
[INFO] [stderr]  Documenting slaballoc v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(allocator_api, maybe_uninit_slice)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:3:27
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(allocator_api, maybe_uninit_slice)]
[INFO] [stdout]   |                           ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: public documentation for `new` links to private item `SlabError`
[INFO] [stdout]   --> src/slab.rs:59:66
[INFO] [stdout]    |
[INFO] [stdout] 59 |     /// If the input parameters are invalid, this will return a [SlabError].
[INFO] [stdout]    |                                                                  ^^^^^^^^^ this item is private
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(rustdoc::private_intra_doc_links)]` on by default
[INFO] [stdout]    = note: this link resolves only because you passed `--document-private-items`, but will break without
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unresolved link to `core::alloc::Box`
[INFO] [stdout]    --> src/slab.rs:155:27
[INFO] [stdout]     |
[INFO] [stdout] 155 | /// This is similar to a [core::alloc::Box].
[INFO] [stdout]     |                           ^^^^^^^^^^^^^^^^ no item named `Box` in module `alloc`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(rustdoc::broken_intra_doc_links)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors; 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `slaballoc`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name slaballoc src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=392cde126de2dca7 -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "2042678eaaa6698ef4aa33374654f11b98fd121db63fe5d2d74e5cfd014c0ff6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2042678eaaa6698ef4aa33374654f11b98fd121db63fe5d2d74e5cfd014c0ff6", kill_on_drop: false }`
[INFO] [stdout] 2042678eaaa6698ef4aa33374654f11b98fd121db63fe5d2d74e5cfd014c0ff6