[INFO] fetching crate nyar_valkyrie 0.0.8...
[INFO] documenting nyar_valkyrie-0.0.8 against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] extracting crate nyar_valkyrie 0.0.8 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate nyar_valkyrie 0.0.8 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 nyar_valkyrie 0.0.8
[INFO] finished tweaking crates.io crate nyar_valkyrie 0.0.8
[INFO] tweaked toml for crates.io crate nyar_valkyrie 0.0.8 written to /workspace/builds/worker-13/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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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] 210bf6a4d36ae68e8b8e6c82e24aa83ce43e5cbeb67554c2fb6f5276ae3d4171
[INFO] running `Command { std: "docker" "start" "-a" "210bf6a4d36ae68e8b8e6c82e24aa83ce43e5cbeb67554c2fb6f5276ae3d4171", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "210bf6a4d36ae68e8b8e6c82e24aa83ce43e5cbeb67554c2fb6f5276ae3d4171", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "210bf6a4d36ae68e8b8e6c82e24aa83ce43e5cbeb67554c2fb6f5276ae3d4171", kill_on_drop: false }`
[INFO] [stdout] 210bf6a4d36ae68e8b8e6c82e24aa83ce43e5cbeb67554c2fb6f5276ae3d4171
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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] fe933febdb1e53e7c3bd2017670a712c81303c767b80bfcf4817f3153b03548a
[INFO] running `Command { std: "docker" "start" "-a" "fe933febdb1e53e7c3bd2017670a712c81303c767b80bfcf4817f3153b03548a", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.137
[INFO] [stderr]    Compiling proc-macro2 v1.0.39
[INFO] [stderr]    Compiling unicode-ident v1.0.0
[INFO] [stderr]    Compiling serde_json v1.0.81
[INFO] [stderr]     Checking ryu v1.0.10
[INFO] [stderr]     Checking itoa v1.0.2
[INFO] [stderr]     Checking ucd-trie v0.1.3
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]    Compiling num-iter v0.1.43
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]     Checking pest v2.1.3
[INFO] [stderr]    Compiling quote v1.0.18
[INFO] [stderr]    Compiling syn v1.0.95
[INFO] [stderr]    Compiling serde_derive v1.0.137
[INFO] [stderr]     Checking num v0.2.1
[INFO] [stderr]     Checking nyar_ast v0.0.8
[INFO] [stderr]  Documenting nyar_valkyrie v0.0.8 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(format_args_nl)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `nyar_valkyrie`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name nyar_valkyrie src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=378d71c07f38a2d7 -L dependency=/opt/rustwide/target/debug/deps --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-701e134f05ff346a.rmeta --extern nyar_ast=/opt/rustwide/target/debug/deps/libnyar_ast-abf13e825c993f37.rmeta --extern pest=/opt/rustwide/target/debug/deps/libpest-bd314b53b30bd25c.rmeta --cap-lints=warn --crate-version 0.0.8` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "fe933febdb1e53e7c3bd2017670a712c81303c767b80bfcf4817f3153b03548a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fe933febdb1e53e7c3bd2017670a712c81303c767b80bfcf4817f3153b03548a", kill_on_drop: false }`
[INFO] [stdout] fe933febdb1e53e7c3bd2017670a712c81303c767b80bfcf4817f3153b03548a