[INFO] fetching crate rcommunity_core 0.0.3...
[INFO] documenting rcommunity_core-0.0.3 against 1.76.0 for beta-1.77-rustdoc-1
[INFO] extracting crate rcommunity_core 0.0.3 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate rcommunity_core 0.0.3 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] started tweaking crates.io crate rcommunity_core 0.0.3
[INFO] finished tweaking crates.io crate rcommunity_core 0.0.3
[INFO] tweaked toml for crates.io crate rcommunity_core 0.0.3 written to /workspace/builds/worker-5-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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 1e8df961adecf470ea2b03981159b9678541a35a8dcbc0c17bcb239e7d626236
[INFO] running `Command { std: "docker" "start" "-a" "1e8df961adecf470ea2b03981159b9678541a35a8dcbc0c17bcb239e7d626236", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1e8df961adecf470ea2b03981159b9678541a35a8dcbc0c17bcb239e7d626236", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1e8df961adecf470ea2b03981159b9678541a35a8dcbc0c17bcb239e7d626236", kill_on_drop: false }`
[INFO] [stdout] 1e8df961adecf470ea2b03981159b9678541a35a8dcbc0c17bcb239e7d626236
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 5b649589f90b3e0ed94c33a101bda7c0519d587de45fc1eb07033a07a48cc1da
[INFO] running `Command { std: "docker" "start" "-a" "5b649589f90b3e0ed94c33a101bda7c0519d587de45fc1eb07033a07a48cc1da", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.78
[INFO] [stderr]    Compiling async-trait v0.1.77
[INFO] [stderr]     Checking tracing-core v0.1.32
[INFO] [stderr]    Compiling thiserror v1.0.57
[INFO] [stderr]     Checking getrandom v0.2.12
[INFO] [stderr]     Checking uuid v1.7.0
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]    Compiling syn v2.0.48
[INFO] [stderr]    Compiling thiserror-impl v1.0.57
[INFO] [stderr]    Compiling tracing-attributes v0.1.27
[INFO] [stderr]     Checking tracing v0.1.40
[INFO] [stderr]  Documenting rcommunity_core v0.0.3 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:10:1
[INFO] [stdout]    |
[INFO] [stdout] 10 | #![feature(specialization)]
[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 `rcommunity_core`
[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 rcommunity_core src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=2a075265f9ee5958 -L dependency=/opt/rustwide/target/debug/deps --extern async_trait=/opt/rustwide/target/debug/deps/libasync_trait-801d17b80494f302.so --extern parking_lot=/opt/rustwide/target/debug/deps/libparking_lot-13f2a7f9ca60e4f4.rmeta --extern thiserror=/opt/rustwide/target/debug/deps/libthiserror-7e72e4ae40eb5f84.rmeta --extern tracing=/opt/rustwide/target/debug/deps/libtracing-ccebe927eb4b4677.rmeta --extern uuid=/opt/rustwide/target/debug/deps/libuuid-cd9d6428749ce3b4.rmeta --cap-lints=warn --crate-version 0.0.3` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "5b649589f90b3e0ed94c33a101bda7c0519d587de45fc1eb07033a07a48cc1da", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5b649589f90b3e0ed94c33a101bda7c0519d587de45fc1eb07033a07a48cc1da", kill_on_drop: false }`
[INFO] [stdout] 5b649589f90b3e0ed94c33a101bda7c0519d587de45fc1eb07033a07a48cc1da
