[INFO] fetching crate nimiq-block 0.1.0...
[INFO] checking nimiq-block-0.1.0 against master#2748a9fd93dd1a00a4521f4f16de5befbf77f6cd for pr-62262-1
[INFO] extracting crate nimiq-block 0.1.0 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate nimiq-block 0.1.0 on toolchain 2748a9fd93dd1a00a4521f4f16de5befbf77f6cd
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate nimiq-block 0.1.0
[INFO] finished tweaking crates.io crate nimiq-block 0.1.0
[INFO] tweaked toml for crates.io crate nimiq-block 0.1.0 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 85868088c47462ae33d4abc403a109f99283d8991dd7d1c7d65d317622b4f922
[INFO] running `"docker" "start" "-a" "85868088c47462ae33d4abc403a109f99283d8991dd7d1c7d65d317622b4f922"`
[INFO] [stderr]     Checking ed25519-dalek v1.0.0-pre.2
[INFO] [stderr]    Compiling beserial_derive v0.1.0
[INFO] [stderr] error[E0277]: `syn::attr::Meta` doesn't implement `std::fmt::Debug`
[INFO] [stderr]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/beserial_derive-0.1.0/src/lib.rs:55:81
[INFO] [stderr]    |
[INFO] [stderr] 55 | ...                   _ => panic!("unknown attribute for beserial: {:?}", item)
[INFO] [stderr]    |                                                                           ^^^^ `syn::attr::Meta` cannot be formatted using `{:?}` because it doesn't implement `std::fmt::Debug`
[INFO] [stderr]    |
[INFO] [stderr]    = help: the trait `std::fmt::Debug` is not implemented for `syn::attr::Meta`
[INFO] [stderr]    = note: required because of the requirements on the impl of `std::fmt::Debug` for `&syn::attr::Meta`
[INFO] [stderr]    = note: required by `std::fmt::Debug::fmt`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0277`.
[INFO] [stderr] error: could not compile `beserial_derive`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "85868088c47462ae33d4abc403a109f99283d8991dd7d1c7d65d317622b4f922"`
[INFO] running `"docker" "rm" "-f" "85868088c47462ae33d4abc403a109f99283d8991dd7d1c7d65d317622b4f922"`
[INFO] [stdout] 85868088c47462ae33d4abc403a109f99283d8991dd7d1c7d65d317622b4f922