[INFO] fetching crate xorstring 0.1.0...
[INFO] documenting xorstring-0.1.0 against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] extracting crate xorstring 0.1.0 into /workspace/builds/worker-36/source
[INFO] validating manifest of crates.io crate xorstring 0.1.0 on toolchain beta-2022-05-20
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate xorstring 0.1.0
[INFO] finished tweaking crates.io crate xorstring 0.1.0
[INFO] tweaked toml for crates.io crate xorstring 0.1.0 written to /workspace/builds/worker-36/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-36/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-36/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] dd5d72f17e8aeed4af0cfeea0eafcbaa3147b863b94af442d456242cfa08c4d6
[INFO] running `Command { std: "docker" "start" "-a" "dd5d72f17e8aeed4af0cfeea0eafcbaa3147b863b94af442d456242cfa08c4d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dd5d72f17e8aeed4af0cfeea0eafcbaa3147b863b94af442d456242cfa08c4d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dd5d72f17e8aeed4af0cfeea0eafcbaa3147b863b94af442d456242cfa08c4d6", kill_on_drop: false }`
[INFO] [stdout] dd5d72f17e8aeed4af0cfeea0eafcbaa3147b863b94af442d456242cfa08c4d6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-36/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-36/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" "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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-05-20" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b5a2458baa2ee8d0a8f6ac9e43c57c783b9e76f74b3a3b144d533c9893abdbd7
[INFO] running `Command { std: "docker" "start" "-a" "b5a2458baa2ee8d0a8f6ac9e43c57c783b9e76f74b3a3b144d533c9893abdbd7", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling xorstring-procmacro v0.1.0
[INFO] [stderr]  Documenting xorstring 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:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![feature(proc_macro_hygiene)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 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 `xorstring`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name xorstring src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=c6b9d0b62c48b191 -L dependency=/opt/rustwide/target/debug/deps --extern xorstring_procmacro=/opt/rustwide/target/debug/deps/libxorstring_procmacro-db6bf940a994e2fb.so --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "b5a2458baa2ee8d0a8f6ac9e43c57c783b9e76f74b3a3b144d533c9893abdbd7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b5a2458baa2ee8d0a8f6ac9e43c57c783b9e76f74b3a3b144d533c9893abdbd7", kill_on_drop: false }`
[INFO] [stdout] b5a2458baa2ee8d0a8f6ac9e43c57c783b9e76f74b3a3b144d533c9893abdbd7