[INFO] fetching crate polars_arrow_rvsry99dx 0.17.1...
[INFO] documenting polars_arrow_rvsry99dx-0.17.1 against 1.76.0 for beta-1.77-rustdoc-1
[INFO] extracting crate polars_arrow_rvsry99dx 0.17.1 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate polars_arrow_rvsry99dx 0.17.1 on toolchain 1.76.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "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-0-tc1/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: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.76.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f0cf6752b177bdfc41c886bfefe5d576de78c399596cc5b0c3d4b12303291c3e
[INFO] running `Command { std: "docker" "start" "-a" "f0cf6752b177bdfc41c886bfefe5d576de78c399596cc5b0c3d4b12303291c3e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f0cf6752b177bdfc41c886bfefe5d576de78c399596cc5b0c3d4b12303291c3e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f0cf6752b177bdfc41c886bfefe5d576de78c399596cc5b0c3d4b12303291c3e", kill_on_drop: false }`
[INFO] [stdout] f0cf6752b177bdfc41c886bfefe5d576de78c399596cc5b0c3d4b12303291c3e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.76.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ade57db3ea141e3ae70cb738a19b47ce10efdd6f388bf1ab769b143bd0b2eb1b
[INFO] running `Command { std: "docker" "start" "-a" "ade57db3ea141e3ae70cb738a19b47ce10efdd6f388bf1ab769b143bd0b2eb1b", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.71
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]    Compiling num-integer v0.1.43
[INFO] [stderr]    Compiling serde v1.0.114
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling proc-macro2 v1.0.18
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]    Compiling num-iter v0.1.41
[INFO] [stderr]    Compiling indexmap v1.4.0
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]    Compiling syn v1.0.33
[INFO] [stderr]     Checking itoa v0.4.6
[INFO] [stderr]     Checking ppv-lite86 v0.2.8
[INFO] [stderr]    Compiling serde_derive v1.0.114
[INFO] [stderr]    Compiling serde_json v1.0.55
[INFO] [stderr]     Checking aho-corasick v0.7.13
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking regex-syntax v0.6.18
[INFO] [stderr]     Checking encode_unicode v0.3.6
[INFO] [stderr]     Checking smallvec v1.4.0
[INFO] [stderr]     Checking hex v0.4.2
[INFO] [stderr]     Checking flatbuffers v0.6.1
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking dirs v1.0.5
[INFO] [stderr]     Checking time v0.1.43
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking term v0.5.2
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking chrono v0.4.11
[INFO] [stderr]     Checking regex v1.3.9
[INFO] [stderr]     Checking num v0.2.1
[INFO] [stderr]     Checking bstr v0.2.13
[INFO] [stderr]     Checking csv v1.1.3
[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 stable release channel
[INFO] [stdout]   --> src/lib.rs:24:1
[INFO] [stdout]    |
[INFO] [stdout] 24 | #![feature(specialization)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes
[INFO] [stdout]   --> src/lib.rs:24:12
[INFO] [stdout]    |
[INFO] [stdout] 24 | #![feature(specialization)]
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]    = help: consider using `min_specialization` instead, which is more stable and complete
[INFO] [stdout]    = note: `#[warn(incomplete_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error; 1 warning emitted
[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: `/opt/rustwide/rustup-home/toolchains/1.76.0-x86_64-unknown-linux-gnu/bin/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,artifacts,future-incompat --document-private-items -C metadata=84023c7af6fca2c8 -L dependency=/opt/rustwide/target/debug/deps --extern chrono=/opt/rustwide/target/debug/deps/libchrono-89919bfcc8307bd3.rmeta --extern csv=/opt/rustwide/target/debug/deps/libcsv-7732f5424c2b5475.rmeta --extern flatbuffers=/opt/rustwide/target/debug/deps/libflatbuffers-f2a16b4b4c3d4ca8.rmeta --extern hex=/opt/rustwide/target/debug/deps/libhex-874ac3988ea7bded.rmeta --extern indexmap=/opt/rustwide/target/debug/deps/libindexmap-f1cbc9c100fe1a58.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-900704033b235124.rmeta --extern num=/opt/rustwide/target/debug/deps/libnum-03fdf8279a8bfc7d.rmeta --extern prettytable=/opt/rustwide/target/debug/deps/libprettytable-ec718eaa3c20ff21.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-138d8da065e610db.rmeta --extern regex=/opt/rustwide/target/debug/deps/libregex-c5e9598db97d26cb.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-0a782dce344441f6.rmeta --extern serde_derive=/opt/rustwide/target/debug/deps/libserde_derive-59c6d5de5a1b5ad1.so --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-208e243478ee2504.rmeta --cap-lints=warn --crate-version 0.17.1` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "ade57db3ea141e3ae70cb738a19b47ce10efdd6f388bf1ab769b143bd0b2eb1b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ade57db3ea141e3ae70cb738a19b47ce10efdd6f388bf1ab769b143bd0b2eb1b", kill_on_drop: false }`
[INFO] [stdout] ade57db3ea141e3ae70cb738a19b47ce10efdd6f388bf1ab769b143bd0b2eb1b
