[INFO] fetching crate vertigo-browserdriver 0.1.0-beta.3...
[INFO] testing vertigo-browserdriver-0.1.0-beta.3 against 1.60.0 for beta-1.61-1
[INFO] extracting crate vertigo-browserdriver 0.1.0-beta.3 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate vertigo-browserdriver 0.1.0-beta.3 on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "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-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "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" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1f6f7192bcdb695b6731aadf89ccf4fd43c1c025a29bb7b9aed7739c9826e225
[INFO] running `Command { std: "docker" "start" "-a" "1f6f7192bcdb695b6731aadf89ccf4fd43c1c025a29bb7b9aed7739c9826e225", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1f6f7192bcdb695b6731aadf89ccf4fd43c1c025a29bb7b9aed7739c9826e225", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1f6f7192bcdb695b6731aadf89ccf4fd43c1c025a29bb7b9aed7739c9826e225", kill_on_drop: false }`
[INFO] [stdout] 1f6f7192bcdb695b6731aadf89ccf4fd43c1c025a29bb7b9aed7739c9826e225
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "RUSTFLAGS=--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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6e1357d13514adb2205a655deb27d2c8825f3a37c40ad6c775ae70bd6fe31cf1
[INFO] running `Command { std: "docker" "start" "-a" "6e1357d13514adb2205a655deb27d2c8825f3a37c40ad6c775ae70bd6fe31cf1", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.91
[INFO] [stderr]    Compiling ucd-trie v0.1.3
[INFO] [stderr]    Compiling maplit v1.0.2
[INFO] [stderr]    Compiling log v0.4.16
[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 itertools v0.10.3
[INFO] [stderr]    Compiling pest v2.1.3
[INFO] [stderr]    Compiling pest_meta v2.1.3
[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]    Compiling 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: 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 compile `vertigo` due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "6e1357d13514adb2205a655deb27d2c8825f3a37c40ad6c775ae70bd6fe31cf1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6e1357d13514adb2205a655deb27d2c8825f3a37c40ad6c775ae70bd6fe31cf1", kill_on_drop: false }`
[INFO] [stdout] 6e1357d13514adb2205a655deb27d2c8825f3a37c40ad6c775ae70bd6fe31cf1