[INFO] fetching crate futures-await-async-macro 0.1.4...
[INFO] documenting futures-await-async-macro-0.1.4 against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] extracting crate futures-await-async-macro 0.1.4 into /workspace/builds/worker-32/source
[INFO] validating manifest of crates.io crate futures-await-async-macro 0.1.4 on toolchain beta-2022-05-20
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate futures-await-async-macro 0.1.4
[INFO] finished tweaking crates.io crate futures-await-async-macro 0.1.4
[INFO] tweaked toml for crates.io crate futures-await-async-macro 0.1.4 written to /workspace/builds/worker-32/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-32/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-32/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" "+beta-2022-05-20" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8e5cb64d76bc381378554ba3180023935783f37b84cc43f96bc2def247a3a12e
[INFO] running `Command { std: "docker" "start" "-a" "8e5cb64d76bc381378554ba3180023935783f37b84cc43f96bc2def247a3a12e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8e5cb64d76bc381378554ba3180023935783f37b84cc43f96bc2def247a3a12e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8e5cb64d76bc381378554ba3180023935783f37b84cc43f96bc2def247a3a12e", kill_on_drop: false }`
[INFO] [stdout] 8e5cb64d76bc381378554ba3180023935783f37b84cc43f96bc2def247a3a12e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-32/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-32/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" "+beta-2022-05-20" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1f8da47868e5d8c2fcee8473b565e2e2b8818d0c237bfaf6433ea56756d51ad4
[INFO] running `Command { std: "docker" "start" "-a" "1f8da47868e5d8c2fcee8473b565e2e2b8818d0c237bfaf6433ea56756d51ad4", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]     Checking unicode-xid v0.1.0
[INFO] [stderr]     Checking quote v0.6.13
[INFO] [stderr]     Checking syn v0.14.9
[INFO] [stderr]  Documenting futures-await-async-macro v0.1.4 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/lib.rs:12:1
[INFO] [stdout]    |
[INFO] [stdout] 12 | #![feature(proc_macro)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]    |
[INFO] [stdout]    = help: the feature `proc_macro` has been stable since 1.29.0 and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not document `futures-await-async-macro`
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] Caused by:
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type proc-macro --crate-name futures_await_async_macro src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=ea7e0921e34714f8 -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-f4e3ae3972dac938.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-5219a2dbe38fd68d.rmeta --extern syn=/opt/rustwide/target/debug/deps/libsyn-d5b85e1e163f9517.rmeta --extern proc_macro --cap-lints=warn --crate-version 0.1.4` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "1f8da47868e5d8c2fcee8473b565e2e2b8818d0c237bfaf6433ea56756d51ad4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1f8da47868e5d8c2fcee8473b565e2e2b8818d0c237bfaf6433ea56756d51ad4", kill_on_drop: false }`
[INFO] [stdout] 1f8da47868e5d8c2fcee8473b565e2e2b8818d0c237bfaf6433ea56756d51ad4