[INFO] fetching crate genref 0.8.0...
[INFO] documenting genref-0.8.0 against 1.69.0 for beta-1.70-rustdoc-1
[INFO] extracting crate genref 0.8.0 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate genref 0.8.0 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 genref 0.8.0
[INFO] finished tweaking crates.io crate genref 0.8.0
[INFO] tweaked toml for crates.io crate genref 0.8.0 written to /workspace/builds/worker-6-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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 9776fd304c4a6d6b0dd55ed3d62a12ec45150b7272c1be5345819f1cd7cc78a5
[INFO] running `Command { std: "docker" "start" "-a" "9776fd304c4a6d6b0dd55ed3d62a12ec45150b7272c1be5345819f1cd7cc78a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9776fd304c4a6d6b0dd55ed3d62a12ec45150b7272c1be5345819f1cd7cc78a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9776fd304c4a6d6b0dd55ed3d62a12ec45150b7272c1be5345819f1cd7cc78a5", kill_on_drop: false }`
[INFO] [stdout] 9776fd304c4a6d6b0dd55ed3d62a12ec45150b7272c1be5345819f1cd7cc78a5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] fb575da49dfe213607139dab02b2181b9d7d8799610a41148890a0c3078ecb56
[INFO] running `Command { std: "docker" "start" "-a" "fb575da49dfe213607139dab02b2181b9d7d8799610a41148890a0c3078ecb56", kill_on_drop: false }`
[INFO] [stderr]  Documenting genref v0.8.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(assert_matches)]
[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 `genref`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2021 --crate-type lib --crate-name genref src/lib.rs -o /opt/rustwide/target/doc --cfg 'feature="default"' --cfg 'feature="global"' --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=5b786d3208cba9bd -L dependency=/opt/rustwide/target/debug/deps --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-9c7d51f549cf58b7.rmeta --extern lock_api=/opt/rustwide/target/debug/deps/liblock_api-d98438a2e09d5c17.rmeta --extern parking_lot=/opt/rustwide/target/debug/deps/libparking_lot-0e5e0a8cc8b91e3b.rmeta --cap-lints=warn --crate-version 0.8.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "fb575da49dfe213607139dab02b2181b9d7d8799610a41148890a0c3078ecb56", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fb575da49dfe213607139dab02b2181b9d7d8799610a41148890a0c3078ecb56", kill_on_drop: false }`
[INFO] [stdout] fb575da49dfe213607139dab02b2181b9d7d8799610a41148890a0c3078ecb56
