[INFO] cloning repository https://github.com/will-zegers/riscv-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/will-zegers/riscv-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwill-zegers%2Friscv-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwill-zegers%2Friscv-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e33a677422cfd8bb9af21715a093de87e22b7649
[INFO] documenting will-zegers/riscv-rust against beta-2026-04-21 for beta-1.96-rustdoc-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwill-zegers%2Friscv-rust" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] removed /workspace/builds/worker-6-tc2/source/.cargo/config.toml
[INFO] started tweaking git repo https://github.com/will-zegers/riscv-rust
[INFO] finished tweaking git repo https://github.com/will-zegers/riscv-rust
[INFO] tweaked toml for git repo https://github.com/will-zegers/riscv-rust written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/will-zegers/riscv-rust on toolchain beta-2026-04-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/will-zegers/riscv-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-2026-04-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2968ff258c8a9456ad4f96c6de8f3e33cdaf9f134a71a805e3443ff6eb621953
[INFO] running `Command { std: "docker" "start" "-a" "2968ff258c8a9456ad4f96c6de8f3e33cdaf9f134a71a805e3443ff6eb621953", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2968ff258c8a9456ad4f96c6de8f3e33cdaf9f134a71a805e3443ff6eb621953", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2968ff258c8a9456ad4f96c6de8f3e33cdaf9f134a71a805e3443ff6eb621953", kill_on_drop: false }`
[INFO] [stdout] 2968ff258c8a9456ad4f96c6de8f3e33cdaf9f134a71a805e3443ff6eb621953
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fdf5f9ab9e2cad3cadcc56d1cbd4f18b0cae0152bf420a8c3bcfc1fd15a11b87
[INFO] running `Command { std: "docker" "start" "-a" "fdf5f9ab9e2cad3cadcc56d1cbd4f18b0cae0152bf420a8c3bcfc1fd15a11b87", kill_on_drop: false }`
[INFO] [stderr]  Documenting riscv-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(alloc_error_handler)]
[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 `riscv-rust`
[INFO] running `Command { std: "docker" "inspect" "fdf5f9ab9e2cad3cadcc56d1cbd4f18b0cae0152bf420a8c3bcfc1fd15a11b87", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fdf5f9ab9e2cad3cadcc56d1cbd4f18b0cae0152bf420a8c3bcfc1fd15a11b87", kill_on_drop: false }`
[INFO] [stdout] fdf5f9ab9e2cad3cadcc56d1cbd4f18b0cae0152bf420a8c3bcfc1fd15a11b87
