[INFO] fetching crate tower-async-bridge 0.2.0...
[INFO] documenting tower-async-bridge-0.2.0 against 1.75.0 for beta-1.76-rustdoc-1
[INFO] extracting crate tower-async-bridge 0.2.0 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate tower-async-bridge 0.2.0 on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate tower-async-bridge 0.2.0
[INFO] finished tweaking crates.io crate tower-async-bridge 0.2.0
[INFO] tweaked toml for crates.io crate tower-async-bridge 0.2.0 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded hyper v1.1.0
[INFO] [stderr]   Downloaded h2 v0.4.0
[INFO] [stderr]   Downloaded http-body v1.0.0
[INFO] [stderr]   Downloaded tower-async-layer v0.2.0
[INFO] [stderr]   Downloaded tower-async-service v0.2.0
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 23a054b83127353560c35565a45ef7a92d9b245d6c54ddaeeef7192616e9932e
[INFO] running `Command { std: "docker" "start" "-a" "23a054b83127353560c35565a45ef7a92d9b245d6c54ddaeeef7192616e9932e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "23a054b83127353560c35565a45ef7a92d9b245d6c54ddaeeef7192616e9932e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "23a054b83127353560c35565a45ef7a92d9b245d6c54ddaeeef7192616e9932e", kill_on_drop: false }`
[INFO] [stdout] 23a054b83127353560c35565a45ef7a92d9b245d6c54ddaeeef7192616e9932e
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ffe76da6a336acee1eb1257c06cfdfd8e9e32e2acebcab80bc2d2783d3f4adaa
[INFO] running `Command { std: "docker" "start" "-a" "ffe76da6a336acee1eb1257c06cfdfd8e9e32e2acebcab80bc2d2783d3f4adaa", kill_on_drop: false }`
[INFO] [stderr]    Compiling crossbeam-utils v0.8.18
[INFO] [stderr]     Checking tower-async-service v0.2.0
[INFO] [stderr]     Checking tower-async-layer v0.2.0
[INFO] [stderr]     Checking concurrent-queue v2.4.0
[INFO] [stderr]     Checking event-listener v4.0.3
[INFO] [stderr]     Checking event-listener-strategy v0.4.0
[INFO] [stderr]     Checking async-lock v3.2.0
[INFO] [stderr]  Documenting tower-async-bridge v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:9:1
[INFO] [stdout]   |
[INFO] [stdout] 9 | #![feature(associated_type_bounds)]
[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:10:1
[INFO] [stdout]    |
[INFO] [stdout] 10 | #![feature(return_type_notation)]
[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 `tower-async-bridge`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/1.75.0-x86_64-unknown-linux-gnu/bin/rustdoc --edition=2021 --crate-type lib --crate-name tower_async_bridge src/lib.rs -o /opt/rustwide/target/doc --cfg 'feature="default"' --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=0d38c89e049d8f13 -L dependency=/opt/rustwide/target/debug/deps --extern async_lock=/opt/rustwide/target/debug/deps/libasync_lock-2aa0c1f25949086d.rmeta --extern tower_async_layer=/opt/rustwide/target/debug/deps/libtower_async_layer-40bea12cd3f24928.rmeta --extern tower_async_service=/opt/rustwide/target/debug/deps/libtower_async_service-34a05b6c18cf4838.rmeta --extern tower_layer=/opt/rustwide/target/debug/deps/libtower_layer-e7e35fc455f5bf24.rmeta --extern tower_service=/opt/rustwide/target/debug/deps/libtower_service-f0feaf64c8970dba.rmeta --cap-lints=warn --crate-version 0.2.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "ffe76da6a336acee1eb1257c06cfdfd8e9e32e2acebcab80bc2d2783d3f4adaa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ffe76da6a336acee1eb1257c06cfdfd8e9e32e2acebcab80bc2d2783d3f4adaa", kill_on_drop: false }`
[INFO] [stdout] ffe76da6a336acee1eb1257c06cfdfd8e9e32e2acebcab80bc2d2783d3f4adaa
