[INFO] fetching crate lcpc-brakedown-pc 0.1.1...
[INFO] documenting lcpc-brakedown-pc-0.1.1 against 1.76.0 for beta-1.77-rustdoc-1
[INFO] extracting crate lcpc-brakedown-pc 0.1.1 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate lcpc-brakedown-pc 0.1.1 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 lcpc-brakedown-pc 0.1.1
[INFO] finished tweaking crates.io crate lcpc-brakedown-pc 0.1.1
[INFO] tweaked toml for crates.io crate lcpc-brakedown-pc 0.1.1 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "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" "+1.76.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded lcpc-test-fields v0.1.1
[INFO] [stderr]   Downloaded lcpc-2d v0.1.1
[INFO] [stderr]   Downloaded ff-derive-num v0.2.0
[INFO] [stderr]   Downloaded sprs v0.10.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 37974ebb39970614c1d4ad7a2614415fab37dd14e4ece2777fc672a49f5c9afd
[INFO] running `Command { std: "docker" "start" "-a" "37974ebb39970614c1d4ad7a2614415fab37dd14e4ece2777fc672a49f5c9afd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "37974ebb39970614c1d4ad7a2614415fab37dd14e4ece2777fc672a49f5c9afd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "37974ebb39970614c1d4ad7a2614415fab37dd14e4ece2777fc672a49f5c9afd", kill_on_drop: false }`
[INFO] [stdout] 37974ebb39970614c1d4ad7a2614415fab37dd14e4ece2777fc672a49f5c9afd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 06ce1f78dddcd552bbdde7906376defa4a18795d2768f3b0a2819d51b58bce19
[INFO] running `Command { std: "docker" "start" "-a" "06ce1f78dddcd552bbdde7906376defa4a18795d2768f3b0a2819d51b58bce19", kill_on_drop: false }`
[INFO] [stderr]    Compiling libm v0.2.8
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling num-bigint v0.3.3
[INFO] [stderr]    Compiling rustversion v1.0.14
[INFO] [stderr]    Compiling radium v0.7.0
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling typenum v1.17.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking tap v1.0.1
[INFO] [stderr]     Checking either v1.10.0
[INFO] [stderr]    Compiling serde v1.0.196
[INFO] [stderr]     Checking getrandom v0.2.12
[INFO] [stderr]    Compiling syn v2.0.48
[INFO] [stderr]     Checking funty v2.0.0
[INFO] [stderr]     Checking wyz v0.5.1
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]    Compiling unicode-xid v0.2.4
[INFO] [stderr]    Compiling ndarray v0.14.0
[INFO] [stderr]     Checking rawpointer v0.2.1
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking matrixmultiply v0.2.4
[INFO] [stderr]     Checking rayon v1.8.1
[INFO] [stderr]     Checking subtle v2.5.0
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking keccak v0.1.5
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking bitvec v1.0.1
[INFO] [stderr]     Checking num_cpus v1.16.0
[INFO] [stderr]     Checking smallvec v1.13.1
[INFO] [stderr]     Checking itertools v0.10.5
[INFO] [stderr]    Compiling err-derive v0.2.4
[INFO] [stderr]     Checking num-complex v0.3.1
[INFO] [stderr]     Checking approx v0.3.2
[INFO] [stderr]     Checking num-complex v0.2.4
[INFO] [stderr]     Checking num-integer v0.1.46
[INFO] [stderr]     Checking generic-array v0.14.7
[INFO] [stderr]     Checking alga v0.9.3
[INFO] [stderr]     Checking digest v0.9.0
[INFO] [stderr]    Compiling addchain v0.2.0
[INFO] [stderr]    Compiling synstructure v0.12.6
[INFO] [stderr]     Checking sprs v0.10.0
[INFO] [stderr]    Compiling serde_derive v1.0.196
[INFO] [stderr]    Compiling zeroize_derive v1.4.2
[INFO] [stderr]    Compiling ff_derive v0.12.1
[INFO] [stderr]     Checking zeroize v1.7.0
[INFO] [stderr]     Checking merlin v2.0.1
[INFO] [stderr]     Checking ff v0.12.1
[INFO] [stderr]     Checking serde_bytes v0.11.14
[INFO] [stderr]     Checking lcpc-2d v0.1.1
[INFO] [stderr]  Documenting lcpc-brakedown-pc v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 15 | #![feature(test)]
[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 `lcpc-brakedown-pc`
[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 lcpc_brakedown_pc src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=98a0cc4fdd6e1748 -L dependency=/opt/rustwide/target/debug/deps --extern ff=/opt/rustwide/target/debug/deps/libff-9ef8d0ea12955f45.rmeta --extern itertools=/opt/rustwide/target/debug/deps/libitertools-d40f6d0edd1769a8.rmeta --extern lcpc_2d=/opt/rustwide/target/debug/deps/liblcpc_2d-3d6f713a22e1f416.rmeta --extern ndarray=/opt/rustwide/target/debug/deps/libndarray-99140e9f89e7b789.rmeta --extern num_traits=/opt/rustwide/target/debug/deps/libnum_traits-cc6292792a081792.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-f45303a378f18386.rmeta --extern rand_chacha=/opt/rustwide/target/debug/deps/librand_chacha-182999074dbefdce.rmeta --extern rayon=/opt/rustwide/target/debug/deps/librayon-5e7de7d575d63c6b.rmeta --extern sprs=/opt/rustwide/target/debug/deps/libsprs-1e0790731697b8a9.rmeta --extern typenum=/opt/rustwide/target/debug/deps/libtypenum-a22c9e237c9da55d.rmeta --cap-lints=warn --crate-version 0.1.1` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "06ce1f78dddcd552bbdde7906376defa4a18795d2768f3b0a2819d51b58bce19", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "06ce1f78dddcd552bbdde7906376defa4a18795d2768f3b0a2819d51b58bce19", kill_on_drop: false }`
[INFO] [stdout] 06ce1f78dddcd552bbdde7906376defa4a18795d2768f3b0a2819d51b58bce19
