[INFO] fetching crate generational-arena-tree 0.0.0-dev.2...
[INFO] documenting generational-arena-tree-0.0.0-dev.2 against 1.76.0 for beta-1.77-rustdoc-1
[INFO] extracting crate generational-arena-tree 0.0.0-dev.2 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate generational-arena-tree 0.0.0-dev.2 on toolchain 1.76.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-4-tc1/source/rust-toolchain.toml
[INFO] started tweaking crates.io crate generational-arena-tree 0.0.0-dev.2
[INFO] finished tweaking crates.io crate generational-arena-tree 0.0.0-dev.2
[INFO] tweaked toml for crates.io crate generational-arena-tree 0.0.0-dev.2 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded cfg_attrs v2.1.2
[INFO] [stderr]   Downloaded generational-arena v0.2.9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.76.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 40a8c2ce6437fa0e0d11800bfd18996b47562cc694ee01afc9aa120274f324ae
[INFO] running `Command { std: "docker" "start" "-a" "40a8c2ce6437fa0e0d11800bfd18996b47562cc694ee01afc9aa120274f324ae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "40a8c2ce6437fa0e0d11800bfd18996b47562cc694ee01afc9aa120274f324ae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "40a8c2ce6437fa0e0d11800bfd18996b47562cc694ee01afc9aa120274f324ae", kill_on_drop: false }`
[INFO] [stdout] 40a8c2ce6437fa0e0d11800bfd18996b47562cc694ee01afc9aa120274f324ae
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.76.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8774571f8306d2d973a6b8a064b1dfac308d026388a2993337206aad13f0abfc
[INFO] running `Command { std: "docker" "start" "-a" "8774571f8306d2d973a6b8a064b1dfac308d026388a2993337206aad13f0abfc", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.78
[INFO] [stderr]    Compiling cfg_attrs v2.1.2
[INFO] [stderr]     Checking generational-arena v0.2.9
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]    Compiling syn v2.0.48
[INFO] [stderr]    Compiling thiserror-impl v1.0.57
[INFO] [stderr]     Checking thiserror v1.0.57
[INFO] [stderr]  Documenting generational-arena-tree v0.0.0-dev.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![feature(doc_cfg)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `generational-arena-tree`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/1.76.0-x86_64-unknown-linux-gnu/bin/rustdoc --edition=2021 --crate-type lib --crate-name generational_arena_tree src/lib.rs -o /opt/rustwide/target/doc --cfg 'feature="default"' --cfg 'feature="deque"' --cfg 'feature="split"' --cfg 'feature="unified"' --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=b73f8884af39eb36 -L dependency=/opt/rustwide/target/debug/deps --extern cfg_attrs=/opt/rustwide/target/debug/deps/libcfg_attrs-a52629acaea02cff.so --extern generational_arena=/opt/rustwide/target/debug/deps/libgenerational_arena-6d9319a50efbd0c9.rmeta --extern thiserror=/opt/rustwide/target/debug/deps/libthiserror-b049f132ddfc695e.rmeta --cap-lints=warn --crate-version 0.0.0-dev.2` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "8774571f8306d2d973a6b8a064b1dfac308d026388a2993337206aad13f0abfc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8774571f8306d2d973a6b8a064b1dfac308d026388a2993337206aad13f0abfc", kill_on_drop: false }`
[INFO] [stdout] 8774571f8306d2d973a6b8a064b1dfac308d026388a2993337206aad13f0abfc
[INFO] documenting generational-arena-tree-0.0.0-dev.2 against beta-2024-02-10 for beta-1.77-rustdoc-1
[INFO] extracting crate generational-arena-tree 0.0.0-dev.2 into /workspace/builds/worker-4-tc2/source
[INFO] validating manifest of crates.io crate generational-arena-tree 0.0.0-dev.2 on toolchain beta-2024-02-10
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2024-02-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-4-tc2/source/rust-toolchain.toml
[INFO] started tweaking crates.io crate generational-arena-tree 0.0.0-dev.2
[INFO] finished tweaking crates.io crate generational-arena-tree 0.0.0-dev.2
[INFO] tweaked toml for crates.io crate generational-arena-tree 0.0.0-dev.2 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2024-02-10" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2024-02-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2024-02-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 563da6a14f6a846b71064d375f4684c4ba5391bdd3b53ef31a5eed48c835fd68
[INFO] running `Command { std: "docker" "start" "-a" "563da6a14f6a846b71064d375f4684c4ba5391bdd3b53ef31a5eed48c835fd68", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "563da6a14f6a846b71064d375f4684c4ba5391bdd3b53ef31a5eed48c835fd68", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "563da6a14f6a846b71064d375f4684c4ba5391bdd3b53ef31a5eed48c835fd68", kill_on_drop: false }`
[INFO] [stdout] 563da6a14f6a846b71064d375f4684c4ba5391bdd3b53ef31a5eed48c835fd68
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2024-02-10" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3f98479a0be1d0043a6667efebe5b00cc88dd3512e5716ec077a3424b0b97201
[INFO] running `Command { std: "docker" "start" "-a" "3f98479a0be1d0043a6667efebe5b00cc88dd3512e5716ec077a3424b0b97201", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.78
[INFO] [stderr]    Compiling cfg_attrs v2.1.2
[INFO] [stderr]     Checking generational-arena v0.2.9
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]    Compiling syn v2.0.48
[INFO] [stderr]    Compiling thiserror-impl v1.0.57
[INFO] [stderr]     Checking thiserror v1.0.57
[INFO] [stderr]  Documenting generational-arena-tree v0.0.0-dev.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![feature(doc_cfg)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `generational-arena-tree`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/beta-2024-02-10-x86_64-unknown-linux-gnu/bin/rustdoc --edition=2021 --crate-type lib --crate-name generational_arena_tree src/lib.rs -o /opt/rustwide/target/doc --cfg 'feature="default"' --cfg 'feature="deque"' --cfg 'feature="split"' --cfg 'feature="unified"' --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=1fea5a4ffb68b0ec -L dependency=/opt/rustwide/target/debug/deps --extern cfg_attrs=/opt/rustwide/target/debug/deps/libcfg_attrs-042ea537f57057d1.so --extern generational_arena=/opt/rustwide/target/debug/deps/libgenerational_arena-35a0b84e3017fa59.rmeta --extern thiserror=/opt/rustwide/target/debug/deps/libthiserror-59f3dd42ef6254e9.rmeta --cap-lints=warn --crate-version 0.0.0-dev.2` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "3f98479a0be1d0043a6667efebe5b00cc88dd3512e5716ec077a3424b0b97201", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3f98479a0be1d0043a6667efebe5b00cc88dd3512e5716ec077a3424b0b97201", kill_on_drop: false }`
[INFO] [stdout] 3f98479a0be1d0043a6667efebe5b00cc88dd3512e5716ec077a3424b0b97201
