[INFO] fetching crate doublify-toolkit 0.1.1...
[INFO] testing doublify-toolkit-0.1.1 against beta-2021-09-08 for beta-1.56-1
[INFO] extracting crate doublify-toolkit 0.1.1 into /workspace/builds/worker-33/source
[INFO] validating manifest of crates.io crate doublify-toolkit 0.1.1 on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate doublify-toolkit 0.1.1
[INFO] finished tweaking crates.io crate doublify-toolkit 0.1.1
[INFO] tweaked toml for crates.io crate doublify-toolkit 0.1.1 written to /workspace/builds/worker-33/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "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-2021-09-08" "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-33/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-33/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] de01785908eb577ddd07a25851c9c2e8b7a6b13e89713ab1b7d5fcd472eddd62
[INFO] running `Command { std: "docker" "start" "-a" "de01785908eb577ddd07a25851c9c2e8b7a6b13e89713ab1b7d5fcd472eddd62", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "de01785908eb577ddd07a25851c9c2e8b7a6b13e89713ab1b7d5fcd472eddd62", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "de01785908eb577ddd07a25851c9c2e8b7a6b13e89713ab1b7d5fcd472eddd62", kill_on_drop: false }`
[INFO] [stdout] de01785908eb577ddd07a25851c9c2e8b7a6b13e89713ab1b7d5fcd472eddd62
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-33/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-33/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 34ad496cbf28ce0b904d221e14458aa5c2418d729ec0db4e0b6e25d04b66ecc8
[INFO] running `Command { std: "docker" "start" "-a" "34ad496cbf28ce0b904d221e14458aa5c2418d729ec0db4e0b6e25d04b66ecc8", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling doublify-toolkit 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:22:1
[INFO] [stdout]    |
[INFO] [stdout] 22 | #![feature(box_patterns)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `doublify-toolkit` due to 2 previous errors
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "34ad496cbf28ce0b904d221e14458aa5c2418d729ec0db4e0b6e25d04b66ecc8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "34ad496cbf28ce0b904d221e14458aa5c2418d729ec0db4e0b6e25d04b66ecc8", kill_on_drop: false }`
[INFO] [stdout] 34ad496cbf28ce0b904d221e14458aa5c2418d729ec0db4e0b6e25d04b66ecc8