[INFO] fetching crate polars_arrow_rvsry99dx 0.17.1...
[INFO] documenting polars_arrow_rvsry99dx-0.17.1 against beta-2021-08-01 for beta-1.55-rustdoc-1
[INFO] extracting crate polars_arrow_rvsry99dx 0.17.1 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate polars_arrow_rvsry99dx 0.17.1 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 polars_arrow_rvsry99dx 0.17.1
[INFO] finished tweaking crates.io crate polars_arrow_rvsry99dx 0.17.1
[INFO] tweaked toml for crates.io crate polars_arrow_rvsry99dx 0.17.1 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate crates.io crate polars_arrow_rvsry99dx 0.17.1 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded flatbuffers v0.6.1
[INFO] [stderr]   Downloaded packed_simd v0.3.3
[INFO] [stderr]   Downloaded syn v1.0.33
[INFO] [stderr]   Downloaded indexmap v1.4.0
[INFO] [stderr]   Downloaded adler32 v1.1.0
[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] 9a6d9858a7e86d395b93ad60a72d25c52d18b17e46f926a4d4fc22502f2a3730
[INFO] running `Command { std: "docker" "start" "-a" "9a6d9858a7e86d395b93ad60a72d25c52d18b17e46f926a4d4fc22502f2a3730", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9a6d9858a7e86d395b93ad60a72d25c52d18b17e46f926a4d4fc22502f2a3730", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9a6d9858a7e86d395b93ad60a72d25c52d18b17e46f926a4d4fc22502f2a3730", kill_on_drop: false }`
[INFO] [stdout] 9a6d9858a7e86d395b93ad60a72d25c52d18b17e46f926a4d4fc22502f2a3730
[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] [stdout] f864304b08ed4b7753183b663f03061b8ed9872e19dea3f567a1f574ee518e9e
[INFO] running `Command { std: "docker" "start" "-a" "f864304b08ed4b7753183b663f03061b8ed9872e19dea3f567a1f574ee518e9e", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.114
[INFO] [stderr]    Compiling syn v1.0.33
[INFO] [stderr]    Compiling serde_json v1.0.55
[INFO] [stderr]     Checking encode_unicode v0.3.6
[INFO] [stderr]     Checking smallvec v1.4.0
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]    Compiling num-integer v0.1.43
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]    Compiling num-iter v0.1.41
[INFO] [stderr]    Compiling indexmap v1.4.0
[INFO] [stderr]     Checking dirs v1.0.5
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking time v0.1.43
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking flatbuffers v0.6.1
[INFO] [stderr]     Checking term v0.5.2
[INFO] [stderr]     Checking num-complex v0.2.4
[INFO] [stderr]     Checking chrono v0.4.11
[INFO] [stderr]     Checking num v0.2.1
[INFO] [stderr]     Checking bstr v0.2.13
[INFO] [stderr]     Checking csv v1.1.3
[INFO] [stderr]    Compiling serde_derive v1.0.114
[INFO] [stderr]     Checking prettytable-rs v0.8.0
[INFO] [stderr]  Documenting polars_arrow_rvsry99dx v0.17.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/lib.rs:24:1
[INFO] [stdout]    |
[INFO] [stdout] 24 | #![feature(specialization)]
[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 `polars_arrow_rvsry99dx`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name polars_arrow_rvsry99dx src/lib.rs -o /opt/rustwide/target/doc --cfg 'feature="default"' --cfg 'feature="prettyprint"' --cfg 'feature="prettytable-rs"' --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern chrono=/opt/rustwide/target/debug/deps/libchrono-0e4db45b054ab295.rmeta --extern csv=/opt/rustwide/target/debug/deps/libcsv-ef870946b0399912.rmeta --extern flatbuffers=/opt/rustwide/target/debug/deps/libflatbuffers-61347ffa1fbfd385.rmeta --extern hex=/opt/rustwide/target/debug/deps/libhex-701ef8df1d18df88.rmeta --extern indexmap=/opt/rustwide/target/debug/deps/libindexmap-44a6d57ed01c4afe.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-5e37eee3e84fafab.rmeta --extern num=/opt/rustwide/target/debug/deps/libnum-249635a30bf6be80.rmeta --extern prettytable=/opt/rustwide/target/debug/deps/libprettytable-ee13df313d1036ad.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-502b0308d50b67a5.rmeta --extern regex=/opt/rustwide/target/debug/deps/libregex-486c005b2bd184c9.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-aa9cd0da168bc0ce.rmeta --extern serde_derive=/opt/rustwide/target/debug/deps/libserde_derive-ca6ff58c2d0b1210.so --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-9d2098c1e3c66270.rmeta --cap-lints=warn --crate-version 0.17.1` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "f864304b08ed4b7753183b663f03061b8ed9872e19dea3f567a1f574ee518e9e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f864304b08ed4b7753183b663f03061b8ed9872e19dea3f567a1f574ee518e9e", kill_on_drop: false }`
[INFO] [stdout] f864304b08ed4b7753183b663f03061b8ed9872e19dea3f567a1f574ee518e9e
