[INFO] fetching crate dyn-slice 3.2.0-alpha.2...
[INFO] documenting dyn-slice-3.2.0-alpha.2 against 1.76.0 for beta-1.77-rustdoc-1
[INFO] extracting crate dyn-slice 3.2.0-alpha.2 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate dyn-slice 3.2.0-alpha.2 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] removed /workspace/builds/worker-2-tc1/source/rust-toolchain.toml
[INFO] started tweaking crates.io crate dyn-slice 3.2.0-alpha.2
[INFO] finished tweaking crates.io crate dyn-slice 3.2.0-alpha.2
[INFO] tweaked toml for crates.io crate dyn-slice 3.2.0-alpha.2 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate crates.io crate dyn-slice 3.2.0-alpha.2 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 }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded dissimilar v1.0.7
[INFO] [stderr]   Downloaded basic-toml v0.1.4
[INFO] [stderr]   Downloaded trybuild v1.0.85
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 565b9f6a597c165a55a0d2b1da851816f5341836e3612db655446d8b468c9057
[INFO] running `Command { std: "docker" "start" "-a" "565b9f6a597c165a55a0d2b1da851816f5341836e3612db655446d8b468c9057", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "565b9f6a597c165a55a0d2b1da851816f5341836e3612db655446d8b468c9057", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "565b9f6a597c165a55a0d2b1da851816f5341836e3612db655446d8b468c9057", kill_on_drop: false }`
[INFO] [stdout] 565b9f6a597c165a55a0d2b1da851816f5341836e3612db655446d8b468c9057
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 5a18fcc5988555f9b0dd3ea17b46e5b4942b0e63269877e4f2c6cf9d631d4c4d
[INFO] running `Command { std: "docker" "start" "-a" "5a18fcc5988555f9b0dd3ea17b46e5b4942b0e63269877e4f2c6cf9d631d4c4d", kill_on_drop: false }`
[INFO] [stderr]  Documenting dyn-slice v3.2.0-alpha.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> lib/lib.rs:17:1
[INFO] [stdout]    |
[INFO] [stdout] 17 | #![feature(ptr_metadata, pointer_byte_offsets)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> lib/lib.rs:18:18
[INFO] [stdout]    |
[INFO] [stdout] 18 | #![cfg_attr(doc, feature(doc_cfg))]
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^^
[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 `dyn-slice`
[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=2021 --crate-type lib --crate-name dyn_slice lib/lib.rs -o /opt/rustwide/target/doc --cfg 'feature="alloc"' --cfg 'feature="default"' --cfg 'feature="std"' --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=8baa69cbe2269a21 -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 3.2.0-alpha.2` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "5a18fcc5988555f9b0dd3ea17b46e5b4942b0e63269877e4f2c6cf9d631d4c4d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5a18fcc5988555f9b0dd3ea17b46e5b4942b0e63269877e4f2c6cf9d631d4c4d", kill_on_drop: false }`
[INFO] [stdout] 5a18fcc5988555f9b0dd3ea17b46e5b4942b0e63269877e4f2c6cf9d631d4c4d
