[INFO] fetching crate proc-macro-kwargs 0.1.5...
[INFO] documenting proc-macro-kwargs-0.1.5 against 1.69.0 for beta-1.70-rustdoc-1
[INFO] extracting crate proc-macro-kwargs 0.1.5 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate proc-macro-kwargs 0.1.5 on toolchain 1.69.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.69.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate proc-macro-kwargs 0.1.5
[INFO] finished tweaking crates.io crate proc-macro-kwargs 0.1.5
[INFO] tweaked toml for crates.io crate proc-macro-kwargs 0.1.5 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" __CARGO_TEST_CHANNEL_OVERRIDE_DO_NOT_USE_THIS="nightly" "/workspace/cargo-home/bin/cargo" "+1.69.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.69.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded proc-macro-kwargs-derive v0.1.5
[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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bffae7625d71b0363591dc97ed1f3a3d37948891e4bc7cbecb7ce6353f1327d7
[INFO] running `Command { std: "docker" "start" "-a" "bffae7625d71b0363591dc97ed1f3a3d37948891e4bc7cbecb7ce6353f1327d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bffae7625d71b0363591dc97ed1f3a3d37948891e4bc7cbecb7ce6353f1327d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bffae7625d71b0363591dc97ed1f3a3d37948891e4bc7cbecb7ce6353f1327d7", kill_on_drop: false }`
[INFO] [stdout] bffae7625d71b0363591dc97ed1f3a3d37948891e4bc7cbecb7ce6353f1327d7
[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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3c8e4854cd97e3740655d029aa8bf83b324ba654237c0c5b8ed39258638e781e
[INFO] running `Command { std: "docker" "start" "-a" "3c8e4854cd97e3740655d029aa8bf83b324ba654237c0c5b8ed39258638e781e", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling unicode-segmentation v1.10.1
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]    Compiling proc-macro-kwargs-derive v0.1.5
[INFO] [stderr]  Documenting proc-macro-kwargs v0.1.5 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(trait_alias)]
[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 `proc-macro-kwargs`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name proc_macro_kwargs src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=e497ed86a06d7b72 -L dependency=/opt/rustwide/target/debug/deps --extern indexmap=/opt/rustwide/target/debug/deps/libindexmap-c4694b1f37940f3c.rmeta --extern proc_macro_kwargs_derive=/opt/rustwide/target/debug/deps/libproc_macro_kwargs_derive-0691af2d56faa3a1.so --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-a4e671e7fcb6e2fd.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-3c5df073fef2eea2.rmeta --extern syn=/opt/rustwide/target/debug/deps/libsyn-a5c50df5f4f83e53.rmeta --cap-lints=warn --crate-version 0.1.5` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "3c8e4854cd97e3740655d029aa8bf83b324ba654237c0c5b8ed39258638e781e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3c8e4854cd97e3740655d029aa8bf83b324ba654237c0c5b8ed39258638e781e", kill_on_drop: false }`
[INFO] [stdout] 3c8e4854cd97e3740655d029aa8bf83b324ba654237c0c5b8ed39258638e781e
