[INFO] fetching crate autoproto 0.1.2...
[INFO] documenting autoproto-0.1.2 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] extracting crate autoproto 0.1.2 into /workspace/builds/worker-26/source
[INFO] validating manifest of crates.io crate autoproto 0.1.2 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 autoproto 0.1.2
[INFO] finished tweaking crates.io crate autoproto 0.1.2
[INFO] tweaked toml for crates.io crate autoproto 0.1.2 written to /workspace/builds/worker-26/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]  Downloading crates ...
[INFO] [stderr]   Downloaded prost v0.8.0
[INFO] [stderr]   Downloaded prost-derive v0.8.0
[INFO] [stderr]   Downloaded autoproto-derive v0.1.0
[INFO] [stderr]   Downloaded quickcheck v1.0.3
[INFO] [stderr]   Downloaded quickcheck_macros v1.0.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-26/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-26/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] 5ebca798de4dbe380e9d6dc26161325418d56a45c41f2baa3acb1dbb23b392e5
[INFO] running `Command { std: "docker" "start" "-a" "5ebca798de4dbe380e9d6dc26161325418d56a45c41f2baa3acb1dbb23b392e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5ebca798de4dbe380e9d6dc26161325418d56a45c41f2baa3acb1dbb23b392e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5ebca798de4dbe380e9d6dc26161325418d56a45c41f2baa3acb1dbb23b392e5", kill_on_drop: false }`
[INFO] [stdout] 5ebca798de4dbe380e9d6dc26161325418d56a45c41f2baa3acb1dbb23b392e5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-26/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-26/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] 29823818dd82dea8f7da5cfe7a424ebef50d14f6b2c62f1ede5e7ed5f5943f6f
[INFO] running `Command { std: "docker" "start" "-a" "29823818dd82dea8f7da5cfe7a424ebef50d14f6b2c62f1ede5e7ed5f5943f6f", kill_on_drop: false }`
[INFO] [stderr]    Compiling anyhow v1.0.57
[INFO] [stderr]    Compiling syn v1.0.95
[INFO] [stderr]    Compiling either v1.6.1
[INFO] [stderr]     Checking bytes v1.1.0
[INFO] [stderr]     Checking static_assertions v1.1.0
[INFO] [stderr]     Checking arrayvec v0.7.2
[INFO] [stderr]     Checking smallvec v1.8.0
[INFO] [stderr]    Compiling itertools v0.10.3
[INFO] [stderr]    Compiling prost-derive v0.8.0
[INFO] [stderr]    Compiling autoproto-derive v0.1.0
[INFO] [stderr]     Checking prost v0.8.0
[INFO] [stderr]  Documenting autoproto v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr] error: could not document `autoproto`
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(generic_associated_types)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] Caused by:
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name autoproto src/lib.rs -o /opt/rustwide/target/doc --cfg 'feature="arrayvec"' --cfg 'feature="default"' --cfg 'feature="smallvec"' --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=bb8d283bf42523a2 -L dependency=/opt/rustwide/target/debug/deps --extern arrayvec=/opt/rustwide/target/debug/deps/libarrayvec-1bd22f1176b54d7c.rmeta --extern autoproto_derive=/opt/rustwide/target/debug/deps/libautoproto_derive-64b89fffd802f9b9.so --extern prost=/opt/rustwide/target/debug/deps/libprost-d289d0042b8486f2.rmeta --extern smallvec=/opt/rustwide/target/debug/deps/libsmallvec-1d5297fdf9e8ed94.rmeta --extern static_assertions=/opt/rustwide/target/debug/deps/libstatic_assertions-df62a6794b74038e.rmeta --cap-lints=warn --crate-version 0.1.2` (exit status: 1)
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "29823818dd82dea8f7da5cfe7a424ebef50d14f6b2c62f1ede5e7ed5f5943f6f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "29823818dd82dea8f7da5cfe7a424ebef50d14f6b2c62f1ede5e7ed5f5943f6f", kill_on_drop: false }`
[INFO] [stdout] 29823818dd82dea8f7da5cfe7a424ebef50d14f6b2c62f1ede5e7ed5f5943f6f