[INFO] fetching crate bitfield-register 0.2.1...
[INFO] checking bitfield-register-0.2.1 against master#936f2600b6c903b04387f74ed5cbce88bb06d243 for pr-91141
[INFO] extracting crate bitfield-register 0.2.1 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate bitfield-register 0.2.1 on toolchain 936f2600b6c903b04387f74ed5cbce88bb06d243
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate bitfield-register 0.2.1
[INFO] finished tweaking crates.io crate bitfield-register 0.2.1
[INFO] tweaked toml for crates.io crate bitfield-register 0.2.1 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "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-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0bb08e78c0f3b492d25f74892b235a3ebb2d51f67f6f64b93f00eff265c600a0
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "0bb08e78c0f3b492d25f74892b235a3ebb2d51f67f6f64b93f00eff265c600a0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0bb08e78c0f3b492d25f74892b235a3ebb2d51f67f6f64b93f00eff265c600a0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0bb08e78c0f3b492d25f74892b235a3ebb2d51f67f6f64b93f00eff265c600a0", kill_on_drop: false }`
[INFO] [stdout] 0bb08e78c0f3b492d25f74892b235a3ebb2d51f67f6f64b93f00eff265c600a0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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=forbid" "-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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7358920ba510433c45495dc035edaad9c38b3836d983ff92671afd148b0c4164
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "7358920ba510433c45495dc035edaad9c38b3836d983ff92671afd148b0c4164", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-xid v0.0.4
[INFO] [stderr]    Compiling quote v0.3.15
[INFO] [stderr]    Compiling synom v0.11.3
[INFO] [stderr]    Compiling syn v0.11.11
[INFO] [stderr]    Compiling bitfield-register-macro v0.2.1
[INFO] [stdout] error[E0774]: `derive` may only be applied to `struct`s, `enum`s and `union`s
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/bitfield-register-macro-0.2.1/src/lib.rs:337:5
[INFO] [stdout]     |
[INFO] [stdout] 337 |     #[derive(Debug)]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^ not applicable here
[INFO] [stdout] 338 |     let mut bitfields: Vec<BitField> = vec![];
[INFO] [stdout]     |     ------------------------------------------ not a `struct`, `enum` or `union`
[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 E0774`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `bitfield-register-macro` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "7358920ba510433c45495dc035edaad9c38b3836d983ff92671afd148b0c4164", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7358920ba510433c45495dc035edaad9c38b3836d983ff92671afd148b0c4164", kill_on_drop: false }`
[INFO] [stdout] 7358920ba510433c45495dc035edaad9c38b3836d983ff92671afd148b0c4164