[INFO] fetching crate x86_64 0.14.11...
[INFO] documenting x86_64-0.14.11 against 1.76.0 for beta-1.77-rustdoc-1
[INFO] extracting crate x86_64 0.14.11 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate x86_64 0.14.11 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-5-tc1/source/rust-toolchain
[INFO] started tweaking crates.io crate x86_64 0.14.11
[INFO] finished tweaking crates.io crate x86_64 0.14.11
[INFO] tweaked toml for crates.io crate x86_64 0.14.11 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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded volatile v0.4.6
[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] 77ce019898a2386420740fb4050258bfc9c1d00d46db20ec43af07c03720f51d
[INFO] running `Command { std: "docker" "start" "-a" "77ce019898a2386420740fb4050258bfc9c1d00d46db20ec43af07c03720f51d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "77ce019898a2386420740fb4050258bfc9c1d00d46db20ec43af07c03720f51d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "77ce019898a2386420740fb4050258bfc9c1d00d46db20ec43af07c03720f51d", kill_on_drop: false }`
[INFO] [stdout] 77ce019898a2386420740fb4050258bfc9c1d00d46db20ec43af07c03720f51d
[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] 8939180a62759f7d0d14cbc9348434c417409dbc99df69c74d349595429fa035
[INFO] running `Command { std: "docker" "start" "-a" "8939180a62759f7d0d14cbc9348434c417409dbc99df69c74d349595429fa035", kill_on_drop: false }`
[INFO] [stderr]    Compiling rustversion v1.0.14
[INFO] [stderr]     Checking volatile v0.4.6
[INFO] [stderr]  Documenting x86_64 v0.14.11 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:5:35
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![cfg_attr(feature = "const_fn", feature(const_mut_refs))] // GDT add_entry()
[INFO] [stdout]   |                                   ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:6:44
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![cfg_attr(feature = "abi_x86_interrupt", feature(abi_x86_interrupt))]
[INFO] [stdout]   |                                            ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:7:37
[INFO] [stdout]   |
[INFO] [stdout] 7 | #![cfg_attr(feature = "step_trait", feature(step_trait))]
[INFO] [stdout]   |                                     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 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 `x86_64`
[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=2018 --crate-type lib --crate-name x86_64 src/lib.rs -o /opt/rustwide/target/doc --cfg 'feature="abi_x86_interrupt"' --cfg 'feature="const_fn"' --cfg 'feature="default"' --cfg 'feature="instructions"' --cfg 'feature="nightly"' --cfg 'feature="step_trait"' --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=e95afc171fb341e4 -L dependency=/opt/rustwide/target/debug/deps --extern bit_field=/opt/rustwide/target/debug/deps/libbit_field-b0a7aadd9cb9eb90.rmeta --extern bitflags=/opt/rustwide/target/debug/deps/libbitflags-ec19d6b2a53154e2.rmeta --extern rustversion=/opt/rustwide/target/debug/deps/librustversion-19e6b0c9f3a890e0.so --extern volatile=/opt/rustwide/target/debug/deps/libvolatile-baad057a8325b5b8.rmeta --cap-lints=warn --crate-version 0.14.11` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "8939180a62759f7d0d14cbc9348434c417409dbc99df69c74d349595429fa035", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8939180a62759f7d0d14cbc9348434c417409dbc99df69c74d349595429fa035", kill_on_drop: false }`
[INFO] [stdout] 8939180a62759f7d0d14cbc9348434c417409dbc99df69c74d349595429fa035
