[INFO] cloning repository https://github.com/tomoyat1/an-os-in-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tomoyat1/an-os-in-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftomoyat1%2Fan-os-in-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftomoyat1%2Fan-os-in-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] af66de76d8346b8f7fb4ebaf7c33d39574030644
[INFO] documenting tomoyat1/an-os-in-rust against beta-2025-10-28 for beta-1.92-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftomoyat1%2Fan-os-in-rust" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] removed /workspace/builds/worker-3-tc2/source/.cargo/config.toml
[INFO] started tweaking git repo https://github.com/tomoyat1/an-os-in-rust
[INFO] finished tweaking git repo https://github.com/tomoyat1/an-os-in-rust
[INFO] tweaked toml for git repo https://github.com/tomoyat1/an-os-in-rust written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/tomoyat1/an-os-in-rust on toolchain beta-2025-10-28
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-10-28" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/tomoyat1/an-os-in-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-10-28" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ptr_meta_derive v0.2.0
[INFO] [stderr]   Downloaded ptr_meta v0.2.0
[INFO] [stderr]   Downloaded rlibc v1.0.0
[INFO] [stderr]   Downloaded uguid v2.2.1
[INFO] [stderr]   Downloaded array-macro v2.1.8
[INFO] [stderr]   Downloaded proc-macro2 v1.0.61
[INFO] [stderr]   Downloaded bit_field v0.10.0
[INFO] [stderr]   Downloaded ucs2 v0.3.3
[INFO] [stderr]   Downloaded uefi-macros v0.14.0
[INFO] [stderr]   Downloaded syn v2.0.16
[INFO] [stderr]   Downloaded uefi v0.29.0
[INFO] [stderr]   Downloaded uefi-raw v0.6.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] aa65654293e1e243a02b596a13ee8ff2aeb8f83b3eff902cad70b4a801358397
[INFO] running `Command { std: "docker" "start" "-a" "aa65654293e1e243a02b596a13ee8ff2aeb8f83b3eff902cad70b4a801358397", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "aa65654293e1e243a02b596a13ee8ff2aeb8f83b3eff902cad70b4a801358397", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aa65654293e1e243a02b596a13ee8ff2aeb8f83b3eff902cad70b4a801358397", kill_on_drop: false }`
[INFO] [stdout] aa65654293e1e243a02b596a13ee8ff2aeb8f83b3eff902cad70b4a801358397
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4d5bb62e1af1fe1594394c71bd28296752013f093a06063140067ca360db9c0f
[INFO] running `Command { std: "docker" "start" "-a" "4d5bb62e1af1fe1594394c71bd28296752013f093a06063140067ca360db9c0f", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.61
[INFO] [stderr]    Compiling unicode-ident v1.0.8
[INFO] [stderr]    Compiling quote v1.0.27
[INFO] [stderr]     Checking bitflags v2.9.4
[INFO] [stderr]     Checking bit_field v0.10.0
[INFO] [stderr]     Checking uguid v2.2.1
[INFO] [stderr]    Compiling an-operating-system-in-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking rlibc v1.0.0
[INFO] [stderr]     Checking spin v0.10.0
[INFO] [stderr]     Checking ucs2 v0.3.3
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling syn v2.0.16
[INFO] [stderr]    Compiling ptr_meta_derive v0.2.0
[INFO] [stderr]    Compiling uefi-macros v0.14.0
[INFO] [stderr]     Checking ptr_meta v0.2.0
[INFO] [stderr]     Checking uefi-raw v0.6.0
[INFO] [stderr]     Checking uefi v0.29.0
[INFO] [stderr]     Checking bootlib v0.1.0 (/opt/rustwide/workdir/bootlib)
[INFO] [stderr]  Documenting an-operating-system-in-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(alloc_error_handler)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:7:1
[INFO] [stdout]   |
[INFO] [stdout] 7 | #![feature(extract_if)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:8:1
[INFO] [stdout]   |
[INFO] [stdout] 8 | #![feature(sync_unsafe_cell)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `an-operating-system-in-rust`
[INFO] running `Command { std: "docker" "inspect" "4d5bb62e1af1fe1594394c71bd28296752013f093a06063140067ca360db9c0f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4d5bb62e1af1fe1594394c71bd28296752013f093a06063140067ca360db9c0f", kill_on_drop: false }`
[INFO] [stdout] 4d5bb62e1af1fe1594394c71bd28296752013f093a06063140067ca360db9c0f