[INFO] fetching crate aoko 0.3.0-alpha.24...
[INFO] documenting aoko-0.3.0-alpha.24 against 1.69.0 for beta-1.70-rustdoc-1
[INFO] extracting crate aoko 0.3.0-alpha.24 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate aoko 0.3.0-alpha.24 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 aoko 0.3.0-alpha.24
[INFO] finished tweaking crates.io crate aoko 0.3.0-alpha.24
[INFO] tweaked toml for crates.io crate aoko 0.3.0-alpha.24 written to /workspace/builds/worker-0-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 wasi v0.7.0
[INFO] [stderr]   Downloaded minstant v0.1.2
[INFO] [stderr]   Downloaded no-std-compat v0.4.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 4cc8141d573da15e83fc08c11617009ab7a1393314fc173df11590b09c5d448f
[INFO] running `Command { std: "docker" "start" "-a" "4cc8141d573da15e83fc08c11617009ab7a1393314fc173df11590b09c5d448f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4cc8141d573da15e83fc08c11617009ab7a1393314fc173df11590b09c5d448f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4cc8141d573da15e83fc08c11617009ab7a1393314fc173df11590b09c5d448f", kill_on_drop: false }`
[INFO] [stdout] 4cc8141d573da15e83fc08c11617009ab7a1393314fc173df11590b09c5d448f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 0d4dea79b8b640026847b09621b6aded1aace64aaa1fcaf82aa0829d958588e2
[INFO] running `Command { std: "docker" "start" "-a" "0d4dea79b8b640026847b09621b6aded1aace64aaa1fcaf82aa0829d958588e2", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.56
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking either v1.8.1
[INFO] [stderr]     Checking no-std-compat v0.4.1
[INFO] [stderr]     Checking itertools v0.10.5
[INFO] [stderr]    Compiling quote v1.0.26
[INFO] [stderr]    Compiling ctor v0.1.26
[INFO] [stderr]     Checking minstant v0.1.2
[INFO] [stderr]  Documenting aoko v0.3.0-alpha.24 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(impl_trait_in_fn_trait_return)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(return_position_impl_trait_in_trait)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 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 `aoko`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2021 --crate-type lib --crate-name aoko src/lib.rs -o /opt/rustwide/target/doc --cfg 'feature="default"' --cfg 'feature="minstant"' --cfg 'feature="std"' --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=22b3d9d331bde06b -L dependency=/opt/rustwide/target/debug/deps --extern itertools=/opt/rustwide/target/debug/deps/libitertools-578991b5e0b8e761.rmeta --extern minstant=/opt/rustwide/target/debug/deps/libminstant-2e416e7a34264f8f.rmeta --extern no_std_compat=/opt/rustwide/target/debug/deps/libno_std_compat-aa75463bac388180.rmeta --cap-lints=warn --crate-version 0.3.0-alpha.24` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "0d4dea79b8b640026847b09621b6aded1aace64aaa1fcaf82aa0829d958588e2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0d4dea79b8b640026847b09621b6aded1aace64aaa1fcaf82aa0829d958588e2", kill_on_drop: false }`
[INFO] [stdout] 0d4dea79b8b640026847b09621b6aded1aace64aaa1fcaf82aa0829d958588e2
