[INFO] fetching crate bulwark 0.1.0...
[INFO] testing bulwark-0.1.0 against beta-2021-09-08 for beta-1.56-1
[INFO] extracting crate bulwark 0.1.0 into /workspace/builds/worker-21/source
[INFO] validating manifest of crates.io crate bulwark 0.1.0 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 bulwark 0.1.0
[INFO] finished tweaking crates.io crate bulwark 0.1.0
[INFO] tweaked toml for crates.io crate bulwark 0.1.0 written to /workspace/builds/worker-21/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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded nodrop-union v0.1.11
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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] 09d91c26ca7503b554e283b19b9a94a2e283cce6225f5ae68637f46f080436d7
[INFO] running `Command { std: "docker" "start" "-a" "09d91c26ca7503b554e283b19b9a94a2e283cce6225f5ae68637f46f080436d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "09d91c26ca7503b554e283b19b9a94a2e283cce6225f5ae68637f46f080436d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "09d91c26ca7503b554e283b19b9a94a2e283cce6225f5ae68637f46f080436d7", kill_on_drop: false }`
[INFO] [stdout] 09d91c26ca7503b554e283b19b9a94a2e283cce6225f5ae68637f46f080436d7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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] 4311d6e4833b77e1d9039183c43321ac33b75012008d062bca3cd1d41b27e584
[INFO] running `Command { std: "docker" "start" "-a" "4311d6e4833b77e1d9039183c43321ac33b75012008d062bca3cd1d41b27e584", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling nodrop-union v0.1.11
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/nodrop-union-0.1.11/src/lib.rs:24:1
[INFO] [stdout]    |
[INFO] [stdout] 24 | #![feature(untagged_unions)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0740]: unions may not contain fields that need dropping
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/nodrop-union-0.1.11/src/lib.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 35 |     value: T,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `std::mem::ManuallyDrop` can be used to wrap the type
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/nodrop-union-0.1.11/src/lib.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 35 |     value: T,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0740.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `nodrop-union` due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "4311d6e4833b77e1d9039183c43321ac33b75012008d062bca3cd1d41b27e584", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4311d6e4833b77e1d9039183c43321ac33b75012008d062bca3cd1d41b27e584", kill_on_drop: false }`
[INFO] [stdout] 4311d6e4833b77e1d9039183c43321ac33b75012008d062bca3cd1d41b27e584