[INFO] fetching crate rhythmc_macros 0.0.2...
[INFO] documenting rhythmc_macros-0.0.2 against 1.69.0 for beta-1.70-rustdoc-1
[INFO] extracting crate rhythmc_macros 0.0.2 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate rhythmc_macros 0.0.2 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 rhythmc_macros 0.0.2
[INFO] finished tweaking crates.io crate rhythmc_macros 0.0.2
[INFO] tweaked toml for crates.io crate rhythmc_macros 0.0.2 written to /workspace/builds/worker-1-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 glsl v6.0.2
[INFO] [stderr]   Downloaded rhythmc_compiler v0.0.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 6ba07981a30ae116f6c207700c54c3e1de6be5fc9018e6e38225971a2ad6077f
[INFO] running `Command { std: "docker" "start" "-a" "6ba07981a30ae116f6c207700c54c3e1de6be5fc9018e6e38225971a2ad6077f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6ba07981a30ae116f6c207700c54c3e1de6be5fc9018e6e38225971a2ad6077f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6ba07981a30ae116f6c207700c54c3e1de6be5fc9018e6e38225971a2ad6077f", kill_on_drop: false }`
[INFO] [stdout] 6ba07981a30ae116f6c207700c54c3e1de6be5fc9018e6e38225971a2ad6077f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] cc278555da16d1b590d5e0894919764ec45228cfd06e43133d09ab3c6000a53b
[INFO] running `Command { std: "docker" "start" "-a" "cc278555da16d1b590d5e0894919764ec45228cfd06e43133d09ab3c6000a53b", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.56
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]     Checking unicode-ident v1.0.8
[INFO] [stderr]    Compiling quote v1.0.26
[INFO] [stderr]     Checking minimal-lexical v0.2.1
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking nom v7.1.3
[INFO] [stderr]     Checking glsl v6.0.2
[INFO] [stderr]     Checking rhythmc_compiler v0.0.2
[INFO] [stderr]  Documenting rhythmc_macros v0.0.2 (/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 | |   custom_inner_attributes,
[INFO] [stdout] 3 | |   proc_macro_span,
[INFO] [stdout] 4 | |   proc_macro_diagnostic,
[INFO] [stdout] 5 | |   proc_macro_def_site
[INFO] [stdout] 6 | | )]
[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 `rhythmc_macros`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type proc-macro --crate-name rhythmc_macros src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=ed23e57341ac8c02 -L dependency=/opt/rustwide/target/debug/deps --extern glsl=/opt/rustwide/target/debug/deps/libglsl-62faea7fb004570a.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-0ca4fe4f432b61a2.rmeta --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-a230dfd92c211513.rmeta --extern rhythmc_compiler=/opt/rustwide/target/debug/deps/librhythmc_compiler-7ec23dd4abc00426.rmeta --extern syn=/opt/rustwide/target/debug/deps/libsyn-c87af2a49502e817.rmeta --extern proc_macro --cap-lints=warn --crate-version 0.0.2` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "cc278555da16d1b590d5e0894919764ec45228cfd06e43133d09ab3c6000a53b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cc278555da16d1b590d5e0894919764ec45228cfd06e43133d09ab3c6000a53b", kill_on_drop: false }`
[INFO] [stdout] cc278555da16d1b590d5e0894919764ec45228cfd06e43133d09ab3c6000a53b
