[INFO] fetching crate ak-codegen 0.1.1...
[INFO] documenting ak-codegen-0.1.1 against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] extracting crate ak-codegen 0.1.1 into /workspace/builds/worker-54/source
[INFO] validating manifest of crates.io crate ak-codegen 0.1.1 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 ak-codegen 0.1.1
[INFO] finished tweaking crates.io crate ak-codegen 0.1.1
[INFO] tweaked toml for crates.io crate ak-codegen 0.1.1 written to /workspace/builds/worker-54/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-54/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-54/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] 710af225dc644a2841cb0b05ce9d72fb101123e6ae788e8789d7bb259f4000e7
[INFO] running `Command { std: "docker" "start" "-a" "710af225dc644a2841cb0b05ce9d72fb101123e6ae788e8789d7bb259f4000e7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "710af225dc644a2841cb0b05ce9d72fb101123e6ae788e8789d7bb259f4000e7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "710af225dc644a2841cb0b05ce9d72fb101123e6ae788e8789d7bb259f4000e7", kill_on_drop: false }`
[INFO] [stdout] 710af225dc644a2841cb0b05ce9d72fb101123e6ae788e8789d7bb259f4000e7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-54/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-54/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] 8e8e671c5e107a8579310fbf40dfaf2b88ebb6e2c3655800760971704769e400
[INFO] running `Command { std: "docker" "start" "-a" "8e8e671c5e107a8579310fbf40dfaf2b88ebb6e2c3655800760971704769e400", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.39
[INFO] [stderr]    Compiling syn v1.0.95
[INFO] [stderr]    Compiling unicode-ident v1.0.0
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]    Compiling strsim v0.9.3
[INFO] [stderr]    Compiling ident_case v1.0.1
[INFO] [stderr]     Checking quote v1.0.18
[INFO] [stderr]     Checking darling_core v0.10.2
[INFO] [stderr]    Compiling darling_macro v0.10.2
[INFO] [stderr]     Checking darling v0.10.2
[INFO] [stderr]  Documenting ak-codegen v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(box_syntax)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[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 `ak-codegen`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type proc-macro --crate-name ak_codegen src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=5bec9973f2756368 -L dependency=/opt/rustwide/target/debug/deps --extern darling=/opt/rustwide/target/debug/deps/libdarling-78c66d7a81d34d50.rmeta --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-412f8ac4638e7e9b.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-c3252a44ced4e42f.rmeta --extern syn=/opt/rustwide/target/debug/deps/libsyn-8a8929428349aace.rmeta --extern proc_macro --cap-lints=warn --crate-version 0.1.1` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "8e8e671c5e107a8579310fbf40dfaf2b88ebb6e2c3655800760971704769e400", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8e8e671c5e107a8579310fbf40dfaf2b88ebb6e2c3655800760971704769e400", kill_on_drop: false }`
[INFO] [stdout] 8e8e671c5e107a8579310fbf40dfaf2b88ebb6e2c3655800760971704769e400