[INFO] fetching crate ark-ff-optimized 0.4.1...
[INFO] documenting ark-ff-optimized-0.4.1 against 1.75.0 for beta-1.76-rustdoc-1
[INFO] extracting crate ark-ff-optimized 0.4.1 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate ark-ff-optimized 0.4.1 on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ark-ff-optimized 0.4.1
[INFO] finished tweaking crates.io crate ark-ff-optimized 0.4.1
[INFO] tweaked toml for crates.io crate ark-ff-optimized 0.4.1 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ark-std v0.4.0
[INFO] [stderr]   Downloaded ark-ff-asm v0.4.2
[INFO] [stderr]   Downloaded ark-ec v0.4.2
[INFO] [stderr]   Downloaded criterion v0.4.0
[INFO] [stderr]   Downloaded os_str_bytes v6.6.1
[INFO] [stderr]   Downloaded ark-ff v0.4.2
[INFO] [stderr]   Downloaded ark-poly v0.4.2
[INFO] [stderr]   Downloaded ark-algebra-test-templates v0.4.2
[INFO] [stderr]   Downloaded clap_lex v0.2.4
[INFO] [stderr]   Downloaded ark-serialize-derive v0.4.2
[INFO] [stderr]   Downloaded ark-ff-macros v0.4.2
[INFO] [stderr]   Downloaded clap v3.2.25
[INFO] [stderr]   Downloaded ark-serialize v0.4.2
[INFO] [stderr]   Downloaded ark-algebra-bench-templates v0.4.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5c5de721a94bb7a0ba9a76ce9b38398807f7e641d1fbc770c5cd939e099b83c9
[INFO] running `Command { std: "docker" "start" "-a" "5c5de721a94bb7a0ba9a76ce9b38398807f7e641d1fbc770c5cd939e099b83c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5c5de721a94bb7a0ba9a76ce9b38398807f7e641d1fbc770c5cd939e099b83c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5c5de721a94bb7a0ba9a76ce9b38398807f7e641d1fbc770c5cd939e099b83c9", kill_on_drop: false }`
[INFO] [stdout] 5c5de721a94bb7a0ba9a76ce9b38398807f7e641d1fbc770c5cd939e099b83c9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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" "+1.75.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9cbb67d081d36810e1ca07d1f8bb5da590b29fc8380eb6e86fa22c6b80bf55de
[INFO] running `Command { std: "docker" "start" "-a" "9cbb67d081d36810e1ca07d1f8bb5da590b29fc8380eb6e86fa22c6b80bf55de", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.17
[INFO] [stderr]    Compiling proc-macro2 v1.0.76
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking ppv-lite86 v0.2.17
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling num-bigint v0.4.4
[INFO] [stderr]     Checking crypto-common v0.1.6
[INFO] [stderr]     Checking either v1.9.0
[INFO] [stderr]     Checking digest v0.10.7
[INFO] [stderr]     Checking itertools v0.10.5
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]    Compiling syn v2.0.48
[INFO] [stderr]     Checking ark-std v0.4.0
[INFO] [stderr]     Checking ark-serialize v0.4.2
[INFO] [stderr]    Compiling ark-ff-asm v0.4.2
[INFO] [stderr]    Compiling derivative v2.2.0
[INFO] [stderr]    Compiling ark-ff-macros v0.4.2
[INFO] [stderr]    Compiling zeroize_derive v1.4.2
[INFO] [stderr]     Checking zeroize v1.7.0
[INFO] [stderr]     Checking ark-ff v0.4.2
[INFO] [stderr]  Documenting ark-ff-optimized v0.4.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(const_mut_refs, const_trait_impl)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `ark-ff-optimized`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/1.75.0-x86_64-unknown-linux-gnu/bin/rustdoc --edition=2021 --crate-type lib --crate-name ark_ff_optimized src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=bcc9a203e80e8695 -L dependency=/opt/rustwide/target/debug/deps --extern ark_ff=/opt/rustwide/target/debug/deps/libark_ff-89e3d891c5761563.rmeta --extern ark_serialize=/opt/rustwide/target/debug/deps/libark_serialize-b5320a2508cbabc8.rmeta --extern ark_std=/opt/rustwide/target/debug/deps/libark_std-5ee2059db9b04b7a.rmeta --extern num_bigint=/opt/rustwide/target/debug/deps/libnum_bigint-2b48a465df2c9e56.rmeta --extern zeroize=/opt/rustwide/target/debug/deps/libzeroize-59dd8054091846e8.rmeta --cap-lints=warn --crate-version 0.4.1` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "9cbb67d081d36810e1ca07d1f8bb5da590b29fc8380eb6e86fa22c6b80bf55de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9cbb67d081d36810e1ca07d1f8bb5da590b29fc8380eb6e86fa22c6b80bf55de", kill_on_drop: false }`
[INFO] [stdout] 9cbb67d081d36810e1ca07d1f8bb5da590b29fc8380eb6e86fa22c6b80bf55de
[INFO] documenting ark-ff-optimized-0.4.1 against beta-2023-12-22 for beta-1.76-rustdoc-1
[INFO] extracting crate ark-ff-optimized 0.4.1 into /workspace/builds/worker-7-tc2/source
[INFO] validating manifest of crates.io crate ark-ff-optimized 0.4.1 on toolchain beta-2023-12-22
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2023-12-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ark-ff-optimized 0.4.1
[INFO] finished tweaking crates.io crate ark-ff-optimized 0.4.1
[INFO] tweaked toml for crates.io crate ark-ff-optimized 0.4.1 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2023-12-22" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2023-12-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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" "+beta-2023-12-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fedbdcce145d4328f3e1948a8e95108983828eaf56bafab60b1e0dce8e15bc7a
[INFO] running `Command { std: "docker" "start" "-a" "fedbdcce145d4328f3e1948a8e95108983828eaf56bafab60b1e0dce8e15bc7a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fedbdcce145d4328f3e1948a8e95108983828eaf56bafab60b1e0dce8e15bc7a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fedbdcce145d4328f3e1948a8e95108983828eaf56bafab60b1e0dce8e15bc7a", kill_on_drop: false }`
[INFO] [stdout] fedbdcce145d4328f3e1948a8e95108983828eaf56bafab60b1e0dce8e15bc7a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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" "+beta-2023-12-22" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 93dc88b5c8f9afec7bf7fbc548a4c5d6c985bf97434ac3cc57dcceb29ba24ebb
[INFO] running `Command { std: "docker" "start" "-a" "93dc88b5c8f9afec7bf7fbc548a4c5d6c985bf97434ac3cc57dcceb29ba24ebb", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.17
[INFO] [stderr]    Compiling proc-macro2 v1.0.76
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking ppv-lite86 v0.2.17
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling num-bigint v0.4.4
[INFO] [stderr]     Checking crypto-common v0.1.6
[INFO] [stderr]     Checking either v1.9.0
[INFO] [stderr]     Checking digest v0.10.7
[INFO] [stderr]     Checking itertools v0.10.5
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]    Compiling syn v2.0.48
[INFO] [stderr]     Checking ark-std v0.4.0
[INFO] [stderr]     Checking ark-serialize v0.4.2
[INFO] [stderr]    Compiling zeroize_derive v1.4.2
[INFO] [stderr]    Compiling ark-ff-asm v0.4.2
[INFO] [stderr]    Compiling ark-ff-macros v0.4.2
[INFO] [stderr]    Compiling derivative v2.2.0
[INFO] [stderr]     Checking zeroize v1.7.0
[INFO] [stderr]     Checking ark-ff v0.4.2
[INFO] [stderr]  Documenting ark-ff-optimized v0.4.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(const_mut_refs, const_trait_impl)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `ark-ff-optimized`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/beta-2023-12-22-x86_64-unknown-linux-gnu/bin/rustdoc --edition=2021 --crate-type lib --crate-name ark_ff_optimized src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=e0cdc80b79257886 -L dependency=/opt/rustwide/target/debug/deps --extern ark_ff=/opt/rustwide/target/debug/deps/libark_ff-9731dc9f7c4275e1.rmeta --extern ark_serialize=/opt/rustwide/target/debug/deps/libark_serialize-cde6e4494f044380.rmeta --extern ark_std=/opt/rustwide/target/debug/deps/libark_std-0a7626ff5ef0f5fb.rmeta --extern num_bigint=/opt/rustwide/target/debug/deps/libnum_bigint-96fc13e7e50119c0.rmeta --extern zeroize=/opt/rustwide/target/debug/deps/libzeroize-03f59464acbb201d.rmeta --cap-lints=warn --crate-version 0.4.1` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "93dc88b5c8f9afec7bf7fbc548a4c5d6c985bf97434ac3cc57dcceb29ba24ebb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "93dc88b5c8f9afec7bf7fbc548a4c5d6c985bf97434ac3cc57dcceb29ba24ebb", kill_on_drop: false }`
[INFO] [stdout] 93dc88b5c8f9afec7bf7fbc548a4c5d6c985bf97434ac3cc57dcceb29ba24ebb
