[INFO] fetching crate deus-nqueens 0.4.2...
[INFO] documenting deus-nqueens-0.4.2 against beta-2023-04-20 for beta-1.70-rustdoc-1
[INFO] extracting crate deus-nqueens 0.4.2 into /workspace/builds/worker-7-tc2/source
[INFO] validating manifest of crates.io crate deus-nqueens 0.4.2 on toolchain beta-2023-04-20
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2023-04-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate deus-nqueens 0.4.2
[INFO] finished tweaking crates.io crate deus-nqueens 0.4.2
[INFO] tweaked toml for crates.io crate deus-nqueens 0.4.2 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" __CARGO_TEST_CHANNEL_OVERRIDE_DO_NOT_USE_THIS="nightly" "/workspace/cargo-home/bin/cargo" "+beta-2023-04-20" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2023-04-20" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded svg v0.13.1
[INFO] [stderr]   Downloaded matrixmultiply v0.3.5
[INFO] [stderr]   Downloaded ndarray v0.15.6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2023-04-20" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 46a23d227d00ad98eb7045a98f106140238f925f297e2b581226e9272b3ad411
[INFO] running `Command { std: "docker" "start" "-a" "46a23d227d00ad98eb7045a98f106140238f925f297e2b581226e9272b3ad411", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "46a23d227d00ad98eb7045a98f106140238f925f297e2b581226e9272b3ad411", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "46a23d227d00ad98eb7045a98f106140238f925f297e2b581226e9272b3ad411", kill_on_drop: false }`
[INFO] [stdout] 46a23d227d00ad98eb7045a98f106140238f925f297e2b581226e9272b3ad411
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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" "RUSTFLAGS=--cap-lints=warn" "-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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2023-04-20" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a3afc25fb9d21b1dcbac90cf8e376927f47b3304fdc717fdc135f4524411bfd7
[INFO] running `Command { std: "docker" "start" "-a" "a3afc25fb9d21b1dcbac90cf8e376927f47b3304fdc717fdc135f4524411bfd7", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling num-bigint v0.4.3
[INFO] [stderr]    Compiling num-rational v0.4.1
[INFO] [stderr]    Compiling num-iter v0.1.43
[INFO] [stderr]    Compiling matrixmultiply v0.3.5
[INFO] [stderr]     Checking either v1.8.1
[INFO] [stderr]     Checking svg v0.13.1
[INFO] [stderr]     Checking getrandom v0.2.9
[INFO] [stderr]     Checking itertools v0.10.5
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking num-complex v0.4.3
[INFO] [stderr]     Checking ndarray v0.15.6
[INFO] [stderr]     Checking num v0.4.0
[INFO] [stderr]  Documenting deus-nqueens v0.4.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(iter_from_generator)]
[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:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(generators)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^
[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 E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `deus-nqueens`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name deus_nqueens src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=7c3a259196d12216 -L dependency=/opt/rustwide/target/debug/deps --extern itertools=/opt/rustwide/target/debug/deps/libitertools-04de245827691a50.rmeta --extern ndarray=/opt/rustwide/target/debug/deps/libndarray-92bc2400ed212535.rmeta --extern num=/opt/rustwide/target/debug/deps/libnum-9c2af32b49f64921.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-3a4935e5913053bc.rmeta --extern svg=/opt/rustwide/target/debug/deps/libsvg-f83014c816f6f038.rmeta --cap-lints=warn --crate-version 0.4.2` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "a3afc25fb9d21b1dcbac90cf8e376927f47b3304fdc717fdc135f4524411bfd7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a3afc25fb9d21b1dcbac90cf8e376927f47b3304fdc717fdc135f4524411bfd7", kill_on_drop: false }`
[INFO] [stdout] a3afc25fb9d21b1dcbac90cf8e376927f47b3304fdc717fdc135f4524411bfd7
