[INFO] fetching crate yggdrasil-viewer 0.0.0...
[INFO] documenting yggdrasil-viewer-0.0.0 against 1.76.0 for beta-1.77-rustdoc-1
[INFO] extracting crate yggdrasil-viewer 0.0.0 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate yggdrasil-viewer 0.0.0 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 yggdrasil-viewer 0.0.0
[INFO] finished tweaking crates.io crate yggdrasil-viewer 0.0.0
[INFO] tweaked toml for crates.io crate yggdrasil-viewer 0.0.0 written to /workspace/builds/worker-3-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 daachorse v1.0.0
[INFO] [stderr]   Downloaded shape-core v0.1.17
[INFO] [stderr]   Downloaded svg v0.14.0
[INFO] [stderr]   Downloaded projective v0.3.0
[INFO] [stderr]   Downloaded shape-svg v0.0.9
[INFO] [stderr]   Downloaded yggdrasil-rt v0.0.16
[INFO] [stderr]   Downloaded yggdrasil-parser v0.1.0
[INFO] [stderr]   Downloaded tree-layout v0.0.2
[INFO] [stderr]   Downloaded distantia v0.0.0
[INFO] [stderr]   Downloaded color-core v0.1.6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] f7db145ed295e073483b116899d6e8d6486fbaf7f766c8b67316911ac10653fe
[INFO] running `Command { std: "docker" "start" "-a" "f7db145ed295e073483b116899d6e8d6486fbaf7f766c8b67316911ac10653fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f7db145ed295e073483b116899d6e8d6486fbaf7f766c8b67316911ac10653fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f7db145ed295e073483b116899d6e8d6486fbaf7f766c8b67316911ac10653fe", kill_on_drop: false }`
[INFO] [stdout] f7db145ed295e073483b116899d6e8d6486fbaf7f766c8b67316911ac10653fe
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] dcb41a455f936aca54ffb8edee542152e116eed00f5042890822799e4edfecd4
[INFO] running `Command { std: "docker" "start" "-a" "dcb41a455f936aca54ffb8edee542152e116eed00f5042890822799e4edfecd4", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]    Compiling ahash v0.8.8
[INFO] [stderr]     Checking either v1.10.0
[INFO] [stderr]     Checking zerocopy v0.7.32
[INFO] [stderr]     Checking once_cell v1.19.0
[INFO] [stderr]     Checking distantia v0.0.0
[INFO] [stderr]     Checking memchr v2.7.1
[INFO] [stderr]     Checking color-core v0.1.6
[INFO] [stderr]     Checking regex-syntax v0.8.2
[INFO] [stderr]     Checking daachorse v1.0.0
[INFO] [stderr]     Checking svg v0.14.0
[INFO] [stderr]     Checking itertools v0.12.1
[INFO] [stderr]     Checking hashbrown v0.14.3
[INFO] [stderr]     Checking aho-corasick v1.1.2
[INFO] [stderr]     Checking projective v0.3.0
[INFO] [stderr]     Checking shape-core v0.1.17
[INFO] [stderr]     Checking regex-automata v0.4.5
[INFO] [stderr]     Checking tree-layout v0.0.2
[INFO] [stderr]     Checking shape-svg v0.0.9
[INFO] [stderr]     Checking yggdrasil-rt v0.0.16
[INFO] [stderr]  Documenting yggdrasil-viewer v0.0.0 (/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(return_position_impl_trait_in_trait)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `return_position_impl_trait_in_trait` has been stable since `1.75.0` and no longer requires an attribute to enable
[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 `yggdrasil-viewer`
[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 yggdrasil_viewer src/lib.rs -o /opt/rustwide/target/doc --cfg 'feature="default"' --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=035244303e03dc42 -L dependency=/opt/rustwide/target/debug/deps --extern shape_svg=/opt/rustwide/target/debug/deps/libshape_svg-a145e24624b6a55e.rmeta --extern svg=/opt/rustwide/target/debug/deps/libsvg-ee66d4d099e6d642.rmeta --extern tree_layout=/opt/rustwide/target/debug/deps/libtree_layout-a370cf2044305d7c.rmeta --extern yggdrasil_rt=/opt/rustwide/target/debug/deps/libyggdrasil_rt-3ef7d998bfcef5fe.rmeta --cap-lints=warn --crate-version 0.0.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "dcb41a455f936aca54ffb8edee542152e116eed00f5042890822799e4edfecd4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dcb41a455f936aca54ffb8edee542152e116eed00f5042890822799e4edfecd4", kill_on_drop: false }`
[INFO] [stdout] dcb41a455f936aca54ffb8edee542152e116eed00f5042890822799e4edfecd4
