[INFO] fetching crate static-reflect 0.2.0-alpha.6...
[INFO] documenting static-reflect-0.2.0-alpha.6 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] extracting crate static-reflect 0.2.0-alpha.6 into /workspace/builds/worker-31/source
[INFO] validating manifest of crates.io crate static-reflect 0.2.0-alpha.6 on toolchain 1.61.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate static-reflect 0.2.0-alpha.6
[INFO] finished tweaking crates.io crate static-reflect 0.2.0-alpha.6
[INFO] tweaked toml for crates.io crate static-reflect 0.2.0-alpha.6 written to /workspace/builds/worker-31/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded proc-macro-kwargs-derive v0.1.5
[INFO] [stderr]   Downloaded inherent v1.0.1
[INFO] [stderr]   Downloaded proc-macro-kwargs v0.1.5
[INFO] [stderr]   Downloaded zerogc-derive v0.2.0-alpha.6
[INFO] [stderr]   Downloaded zerogc v0.2.0-alpha.7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-31/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-31/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8c8c19f099996672c5fc3dd05f207374a9794104ae57a92c64df9999c5e1613e
[INFO] running `Command { std: "docker" "start" "-a" "8c8c19f099996672c5fc3dd05f207374a9794104ae57a92c64df9999c5e1613e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8c8c19f099996672c5fc3dd05f207374a9794104ae57a92c64df9999c5e1613e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8c8c19f099996672c5fc3dd05f207374a9794104ae57a92c64df9999c5e1613e", kill_on_drop: false }`
[INFO] [stdout] 8c8c19f099996672c5fc3dd05f207374a9794104ae57a92c64df9999c5e1613e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-31/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-31/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" "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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 463d37fd3f079ab5d4a166bddfd773c796a225d4d6c13ab29c3e36f751957342
[INFO] running `Command { std: "docker" "start" "-a" "463d37fd3f079ab5d4a166bddfd773c796a225d4d6c13ab29c3e36f751957342", kill_on_drop: false }`
[INFO] [stderr]  Documenting static-reflect v0.2.0-alpha.6 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:13:1
[INFO] [stdout]    |
[INFO] [stdout] 13 | / #![feature(
[INFO] [stdout] 14 | |     const_option, // We use Option::unwrap
[INFO] [stdout] 15 | |     const_fn_fn_ptr_basics, // We use PhantomData<fn() -> T>
[INFO] [stdout] 16 | |     const_fn_trait_bound,
[INFO] [stdout] 17 | |     // Used for field_offset macro
[INFO] [stdout] 18 | |     const_ptr_offset_from,
[INFO] [stdout] 19 | | )]
[INFO] [stdout]    | |__^
[INFO] [stdout]    |
[INFO] [stdout]    = help: the feature `const_fn_fn_ptr_basics` has been stable since 1.61.0 and no longer requires an attribute to enable
[INFO] [stdout]    = help: the feature `const_fn_trait_bound` has been stable since 1.61.0 and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:20:32
[INFO] [stdout]    |
[INFO] [stdout] 20 | #![cfg_attr(feature = "never", feature(never_type))]
[INFO] [stdout]    |                                ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 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 `static-reflect`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name static_reflect src/lib.rs -o /opt/rustwide/target/doc --cfg 'feature="builtins"' --cfg 'feature="default"' --cfg 'feature="never"' --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=596cae9ba851114f -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.2.0-alpha.6` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "463d37fd3f079ab5d4a166bddfd773c796a225d4d6c13ab29c3e36f751957342", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "463d37fd3f079ab5d4a166bddfd773c796a225d4d6c13ab29c3e36f751957342", kill_on_drop: false }`
[INFO] [stdout] 463d37fd3f079ab5d4a166bddfd773c796a225d4d6c13ab29c3e36f751957342