[INFO] fetching crate rust_icu_unum 1.0.0...
[INFO] documenting rust_icu_unum-1.0.0 against beta-2021-08-01 for beta-1.55-rustdoc-1
[INFO] extracting crate rust_icu_unum 1.0.0 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate rust_icu_unum 1.0.0 on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rust_icu_unum 1.0.0
[INFO] finished tweaking crates.io crate rust_icu_unum 1.0.0
[INFO] tweaked toml for crates.io crate rust_icu_unum 1.0.0 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] d3d88d02ebdbd4284c7b831aa9778fb48097fa5af341a955d8021f7600c28d63
[INFO] running `Command { std: "docker" "start" "-a" "d3d88d02ebdbd4284c7b831aa9778fb48097fa5af341a955d8021f7600c28d63", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d3d88d02ebdbd4284c7b831aa9778fb48097fa5af341a955d8021f7600c28d63", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d3d88d02ebdbd4284c7b831aa9778fb48097fa5af341a955d8021f7600c28d63", kill_on_drop: false }`
[INFO] [stdout] d3d88d02ebdbd4284c7b831aa9778fb48097fa5af341a955d8021f7600c28d63
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 05d45c6abd2010070959905935c174fdb56fc2cc1a700ddffa2b32515846db8c
[INFO] running `Command { std: "docker" "start" "-a" "05d45c6abd2010070959905935c174fdb56fc2cc1a700ddffa2b32515846db8c", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust_icu_uloc v1.0.0
[INFO] [stderr]    Compiling bindgen v0.53.3
[INFO] [stderr]    Compiling rust_icu_sys v1.0.0
[INFO] [stderr]     Checking rust_icu_common v1.0.0
[INFO] [stderr]     Checking rust_icu_ustring v1.0.0
[INFO] [stderr]     Checking rust_icu_uenum v1.0.0
[INFO] [stderr]     Checking rust_icu_uformattable v1.0.0
[INFO] [stderr]  Documenting rust_icu_unum v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/lib.rs:14:1
[INFO] [stdout]    |
[INFO] [stdout] 14 | #![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 `rust_icu_unum`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name rust_icu_unum src/lib.rs -o /opt/rustwide/target/doc --cfg 'feature="default"' --cfg 'feature="icu_config"' --cfg 'feature="renaming"' --cfg 'feature="use-bindgen"' --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern anyhow=/opt/rustwide/target/debug/deps/libanyhow-e0c590a61c268547.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-56a705720bafac8d.rmeta --extern paste=/opt/rustwide/target/debug/deps/libpaste-b728f708ddfc0fa7.so --extern rust_icu_common=/opt/rustwide/target/debug/deps/librust_icu_common-e9b128c5466c0bbc.rmeta --extern rust_icu_sys=/opt/rustwide/target/debug/deps/librust_icu_sys-0eb5ad5edf91b198.rmeta --extern rust_icu_uformattable=/opt/rustwide/target/debug/deps/librust_icu_uformattable-fea3291fe355ec3c.rmeta --extern rust_icu_uloc=/opt/rustwide/target/debug/deps/librust_icu_uloc-e05660b34f4a8cb6.rmeta --extern rust_icu_ustring=/opt/rustwide/target/debug/deps/librust_icu_ustring-552ee28be057b921.rmeta --cap-lints=warn --crate-version 1.0.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "05d45c6abd2010070959905935c174fdb56fc2cc1a700ddffa2b32515846db8c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "05d45c6abd2010070959905935c174fdb56fc2cc1a700ddffa2b32515846db8c", kill_on_drop: false }`
[INFO] [stdout] 05d45c6abd2010070959905935c174fdb56fc2cc1a700ddffa2b32515846db8c
