[INFO] cloning repository https://github.com/br34th3r/Rust-OS
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/br34th3r/Rust-OS" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbr34th3r%2FRust-OS", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbr34th3r%2FRust-OS'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 647e4d576f135107f5fd080714506bba20724edc
[INFO] documenting br34th3r/Rust-OS against 1.69.0 for beta-1.70-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbr34th3r%2FRust-OS" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/br34th3r/Rust-OS on toolchain 1.69.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.69.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-2-tc1/source/rust-toolchain
[INFO] started tweaking git repo https://github.com/br34th3r/Rust-OS
[INFO] finished tweaking git repo https://github.com/br34th3r/Rust-OS
[INFO] tweaked toml for git repo https://github.com/br34th3r/Rust-OS written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/br34th3r/Rust-OS 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" "+1.69.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded bootloader v0.9.19
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fe1960eb7e4a5f2c4d447fbee64ad44f25818cc11989867011102a9a36c66ed6
[INFO] running `Command { std: "docker" "start" "-a" "fe1960eb7e4a5f2c4d447fbee64ad44f25818cc11989867011102a9a36c66ed6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fe1960eb7e4a5f2c4d447fbee64ad44f25818cc11989867011102a9a36c66ed6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fe1960eb7e4a5f2c4d447fbee64ad44f25818cc11989867011102a9a36c66ed6", kill_on_drop: false }`
[INFO] [stdout] fe1960eb7e4a5f2c4d447fbee64ad44f25818cc11989867011102a9a36c66ed6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 15318fd618c379c50d45211519e97631b8d001a06c189f288cbe613f3ddda230
[INFO] running `Command { std: "docker" "start" "-a" "15318fd618c379c50d45211519e97631b8d001a06c189f288cbe613f3ddda230", kill_on_drop: false }`
[INFO] [stderr]    Compiling bootloader v0.9.19
[INFO] [stderr]     Checking spin v0.5.2
[INFO] [stderr]     Checking volatile v0.2.7
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]  Documenting blog_os v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(asm)]
[INFO] [stdout]   |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 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 `blog_os`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name blog_os src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items '-Arustdoc::private-intra-doc-links' -C metadata=d93fb6491a850388 -L dependency=/opt/rustwide/target/debug/deps --extern bootloader=/opt/rustwide/target/debug/deps/libbootloader-1818e1518858ca2a.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-1c291b2b98f91aa0.rmeta --extern spin=/opt/rustwide/target/debug/deps/libspin-209bb18f422b051a.rmeta --extern volatile=/opt/rustwide/target/debug/deps/libvolatile-e05b11dc38e17b0d.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "15318fd618c379c50d45211519e97631b8d001a06c189f288cbe613f3ddda230", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "15318fd618c379c50d45211519e97631b8d001a06c189f288cbe613f3ddda230", kill_on_drop: false }`
[INFO] [stdout] 15318fd618c379c50d45211519e97631b8d001a06c189f288cbe613f3ddda230
