[INFO] fetching crate image-decompose 0.4.1...
[INFO] documenting image-decompose-0.4.1 against beta-2021-08-01 for beta-1.55-rustdoc-1
[INFO] extracting crate image-decompose 0.4.1 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate image-decompose 0.4.1 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 image-decompose 0.4.1
[INFO] finished tweaking crates.io crate image-decompose 0.4.1
[INFO] tweaked toml for crates.io crate image-decompose 0.4.1 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate crates.io crate image-decompose 0.4.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded lab v0.9.0
[INFO] [stderr]   Downloaded srgb v0.2.0
[INFO] [stderr]   Downloaded rgb_derivation v0.1.2
[INFO] [stderr]   Downloaded srgb v0.1.4
[INFO] [stderr]   Downloaded rgb_derivation v0.2.0
[INFO] [stderr]   Downloaded luv v0.9.0
[INFO] [stderr]   Downloaded webp v0.1.1
[INFO] [stderr]   Downloaded libwebp-sys v0.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] [stdout] 4bd27e0e9b7c01ce50759026fc81684baa47878fac341cf647a5e88d6fb03e68
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "4bd27e0e9b7c01ce50759026fc81684baa47878fac341cf647a5e88d6fb03e68", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4bd27e0e9b7c01ce50759026fc81684baa47878fac341cf647a5e88d6fb03e68", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4bd27e0e9b7c01ce50759026fc81684baa47878fac341cf647a5e88d6fb03e68", kill_on_drop: false }`
[INFO] [stdout] 4bd27e0e9b7c01ce50759026fc81684baa47878fac341cf647a5e88d6fb03e68
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] 1d181770df063fe63c088bc0bf7613d830de2f503bf04b141023443356d80b07
[INFO] running `Command { std: "docker" "start" "-a" "1d181770df063fe63c088bc0bf7613d830de2f503bf04b141023443356d80b07", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.92
[INFO] [stderr]    Compiling syn v1.0.72
[INFO] [stderr]     Checking lab v0.9.0
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]    Compiling num-bigint v0.4.0
[INFO] [stderr]    Compiling num-rational v0.4.0
[INFO] [stderr]     Checking gif v0.11.2
[INFO] [stderr]    Compiling num-complex v0.4.0
[INFO] [stderr]    Compiling rgb_derivation v0.1.2
[INFO] [stderr]    Compiling rgb_derivation v0.2.0
[INFO] [stderr]     Checking crossbeam-epoch v0.9.3
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]     Checking crossbeam-deque v0.8.0
[INFO] [stderr]    Compiling jobserver v0.1.21
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]    Compiling cc v1.0.67
[INFO] [stderr]     Checking rayon-core v1.9.0
[INFO] [stderr]     Checking rayon v1.5.0
[INFO] [stderr]    Compiling libwebp-sys v0.2.0
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling num v0.4.0
[INFO] [stderr]    Compiling srgb v0.1.4
[INFO] [stderr]    Compiling srgb v0.2.0
[INFO] [stderr]     Checking jpeg-decoder v0.1.22
[INFO] [stderr]     Checking luv v0.9.0
[INFO] [stderr]     Checking tiff v0.6.1
[INFO] [stderr]    Compiling clap_derive v3.0.0-beta.2
[INFO] [stderr]     Checking image v0.23.14
[INFO] [stderr]     Checking clap v3.0.0-beta.2
[INFO] [stderr]     Checking webp v0.1.1
[INFO] [stderr]  Documenting image-decompose v0.4.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | / #![feature(
[INFO] [stdout] 2 | |     maybe_uninit_write_slice,
[INFO] [stdout] 3 | |     process_exitcode_placeholder,
[INFO] [stdout] 4 | |     result_into_ok_or_err,
[INFO] [stdout] ... |
[INFO] [stdout] 7 | |     vec_into_raw_parts
[INFO] [stdout] 8 | | )]
[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 `image-decompose`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name image_decompose src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern clap=/opt/rustwide/target/debug/deps/libclap-417f9c5948c481f2.rmeta --extern image=/opt/rustwide/target/debug/deps/libimage-bcb79e0539e94a16.rmeta --extern lab=/opt/rustwide/target/debug/deps/liblab-5e200db50298843f.rmeta --extern luv=/opt/rustwide/target/debug/deps/libluv-a94df22e74134d0e.rmeta --extern rayon=/opt/rustwide/target/debug/deps/librayon-12fce6a79ed5538a.rmeta --extern srgb=/opt/rustwide/target/debug/deps/libsrgb-b8c10775633cd7fc.rmeta --extern webp=/opt/rustwide/target/debug/deps/libwebp-ff5f3027e8bbab52.rmeta --cap-lints=warn --crate-version 0.4.1` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "1d181770df063fe63c088bc0bf7613d830de2f503bf04b141023443356d80b07", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1d181770df063fe63c088bc0bf7613d830de2f503bf04b141023443356d80b07", kill_on_drop: false }`
[INFO] [stdout] 1d181770df063fe63c088bc0bf7613d830de2f503bf04b141023443356d80b07
