[INFO] fetching crate vertigo-browserdriver 0.1.0-beta.3...
[INFO] documenting vertigo-browserdriver-0.1.0-beta.3 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] extracting crate vertigo-browserdriver 0.1.0-beta.3 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate vertigo-browserdriver 0.1.0-beta.3 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 vertigo-browserdriver 0.1.0-beta.3
[INFO] finished tweaking crates.io crate vertigo-browserdriver 0.1.0-beta.3
[INFO] tweaked toml for crates.io crate vertigo-browserdriver 0.1.0-beta.3 written to /workspace/builds/worker-7/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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "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-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] 5c8b7d58c88b5f7d1ad436ee0f841670cab52deadee68ad65b84772541fe0364
[INFO] running `Command { std: "docker" "start" "-a" "5c8b7d58c88b5f7d1ad436ee0f841670cab52deadee68ad65b84772541fe0364", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5c8b7d58c88b5f7d1ad436ee0f841670cab52deadee68ad65b84772541fe0364", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5c8b7d58c88b5f7d1ad436ee0f841670cab52deadee68ad65b84772541fe0364", kill_on_drop: false }`
[INFO] [stdout] 5c8b7d58c88b5f7d1ad436ee0f841670cab52deadee68ad65b84772541fe0364
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] d2eba03313c9424b5bf103daa627b2de0e74c29a445c35762bf5c95d474d6c13
[INFO] running `Command { std: "docker" "start" "-a" "d2eba03313c9424b5bf103daa627b2de0e74c29a445c35762bf5c95d474d6c13", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.39
[INFO] [stderr]    Compiling unicode-ident v1.0.0
[INFO] [stderr]    Compiling either v1.6.1
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling vertigo-browserdriver v0.1.0-beta.3 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling pest_meta v2.1.3
[INFO] [stderr]    Compiling itertools v0.10.3
[INFO] [stderr]    Compiling quote v1.0.18
[INFO] [stderr]    Compiling syn v1.0.95
[INFO] [stderr]    Compiling pest_generator v2.1.3
[INFO] [stderr]    Compiling pest_derive v2.1.0
[INFO] [stderr]    Compiling vertigo-macro v0.1.0-beta.3
[INFO] [stderr]     Checking vertigo v0.1.0-beta.3
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/vertigo-0.1.0-beta.3/src/lib.rs:53:1
[INFO] [stdout]    |
[INFO] [stdout] 53 | #![feature(trait_alias)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/vertigo-0.1.0-beta.3/src/lib.rs:54:1
[INFO] [stdout]    |
[INFO] [stdout] 54 | #![feature(try_trait_v2)] // https://github.com/rust-lang/rust/issues/84277
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/vertigo-0.1.0-beta.3/src/lib.rs:54:12
[INFO] [stdout]    |
[INFO] [stdout] 54 | #![feature(try_trait_v2)] // https://github.com/rust-lang/rust/issues/84277
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 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 compile `vertigo` due to 4 previous errors
[INFO] running `Command { std: "docker" "inspect" "d2eba03313c9424b5bf103daa627b2de0e74c29a445c35762bf5c95d474d6c13", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d2eba03313c9424b5bf103daa627b2de0e74c29a445c35762bf5c95d474d6c13", kill_on_drop: false }`
[INFO] [stdout] d2eba03313c9424b5bf103daa627b2de0e74c29a445c35762bf5c95d474d6c13