[INFO] fetching crate cactusref 0.4.0...
[INFO] documenting cactusref-0.4.0 against 1.75.0 for beta-1.76-rustdoc-1
[INFO] extracting crate cactusref 0.4.0 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate cactusref 0.4.0 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 cactusref 0.4.0
[INFO] finished tweaking crates.io crate cactusref 0.4.0
[INFO] tweaked toml for crates.io crate cactusref 0.4.0 written to /workspace/builds/worker-0-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 toml v0.7.8
[INFO] [stderr]   Downloaded env_logger v0.10.1
[INFO] [stderr]   Downloaded version-sync v0.9.5
[INFO] [stderr]   Downloaded pulldown-cmark v0.9.3
[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" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 47644ef475f47211e40e9646d892c13e71eceafcbf0fcb4a05bae689d03281a6
[INFO] running `Command { std: "docker" "start" "-a" "47644ef475f47211e40e9646d892c13e71eceafcbf0fcb4a05bae689d03281a6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "47644ef475f47211e40e9646d892c13e71eceafcbf0fcb4a05bae689d03281a6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "47644ef475f47211e40e9646d892c13e71eceafcbf0fcb4a05bae689d03281a6", kill_on_drop: false }`
[INFO] [stdout] 47644ef475f47211e40e9646d892c13e71eceafcbf0fcb4a05bae689d03281a6
[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" "+1.75.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 239af6ccc226353813494ac8b4ffe92bb126279aa651db9b65f219822eeda8aa
[INFO] running `Command { std: "docker" "start" "-a" "239af6ccc226353813494ac8b4ffe92bb126279aa651db9b65f219822eeda8aa", kill_on_drop: false }`
[INFO] [stderr]     Checking hashbrown v0.14.3
[INFO] [stderr]     Checking rustc-hash v1.1.0
[INFO] [stderr]  Documenting cactusref v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | / #![feature(
[INFO] [stdout] 2 | |     allocator_api,
[INFO] [stdout] 3 | |     core_intrinsics,
[INFO] [stdout] 4 | |     dropck_eyepatch,
[INFO] [stdout] ... |
[INFO] [stdout] 7 | |     slice_ptr_get
[INFO] [stdout] 8 | | )]
[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 `cactusref`
[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 cactusref src/lib.rs -o /opt/rustwide/target/doc --cfg 'feature="default"' --cfg 'feature="std"' --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=98d6934acf09371f -L dependency=/opt/rustwide/target/debug/deps --extern hashbrown=/opt/rustwide/target/debug/deps/libhashbrown-04ec22927c15ef34.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-91e42ebaf8a62e54.rmeta --extern rustc_hash=/opt/rustwide/target/debug/deps/librustc_hash-cb4f3756b9c4dcfa.rmeta --cap-lints=warn --crate-version 0.4.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "239af6ccc226353813494ac8b4ffe92bb126279aa651db9b65f219822eeda8aa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "239af6ccc226353813494ac8b4ffe92bb126279aa651db9b65f219822eeda8aa", kill_on_drop: false }`
[INFO] [stdout] 239af6ccc226353813494ac8b4ffe92bb126279aa651db9b65f219822eeda8aa
