[INFO] fetching crate bitfield-register 0.2.1...
[INFO] checking bitfield-register-0.2.1 against master#f609b7e0586f81fefb3523e3e17adf779ac416be for pr-129466-2
[INFO] extracting crate bitfield-register 0.2.1 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate bitfield-register 0.2.1 on toolchain f609b7e0586f81fefb3523e3e17adf779ac416be
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f609b7e0586f81fefb3523e3e17adf779ac416be" "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-4-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f609b7e0586f81fefb3523e3e17adf779ac416be" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 5 packages to latest compatible versions
[INFO] [stderr]       Adding quote v0.3.15 (available: v1.0.37)
[INFO] [stderr]       Adding syn v0.11.11 (available: v2.0.77)
[INFO] [stderr]       Adding unicode-xid v0.0.4 (available: v0.2.6)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f609b7e0586f81fefb3523e3e17adf779ac416be" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded unicode-xid v0.0.4
[INFO] [stderr]   Downloaded quote v0.3.15
[INFO] [stderr]   Downloaded bitfield-register-macro v0.2.1
[INFO] [stderr]   Downloaded syn v0.11.11
[INFO] [stderr]   Downloaded synom v0.11.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+f609b7e0586f81fefb3523e3e17adf779ac416be" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4a9701e51927adb6a4fb3a373a00c7574ca82108d0b5c8197aec61c8fca056de
[INFO] running `Command { std: "docker" "start" "-a" "4a9701e51927adb6a4fb3a373a00c7574ca82108d0b5c8197aec61c8fca056de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4a9701e51927adb6a4fb3a373a00c7574ca82108d0b5c8197aec61c8fca056de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4a9701e51927adb6a4fb3a373a00c7574ca82108d0b5c8197aec61c8fca056de", kill_on_drop: false }`
[INFO] [stdout] 4a9701e51927adb6a4fb3a373a00c7574ca82108d0b5c8197aec61c8fca056de
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "RUSTDOCFLAGS=--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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+f609b7e0586f81fefb3523e3e17adf779ac416be" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c52c3496800a4e6b58e00bf57aa5f355d85e15f31dcd2897669336a4009d2aad
[INFO] running `Command { std: "docker" "start" "-a" "c52c3496800a4e6b58e00bf57aa5f355d85e15f31dcd2897669336a4009d2aad", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021
[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/index.crates.io-6f17d22bba15001f/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 1 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` (lib) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "c52c3496800a4e6b58e00bf57aa5f355d85e15f31dcd2897669336a4009d2aad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c52c3496800a4e6b58e00bf57aa5f355d85e15f31dcd2897669336a4009d2aad", kill_on_drop: false }`
[INFO] [stdout] c52c3496800a4e6b58e00bf57aa5f355d85e15f31dcd2897669336a4009d2aad