[INFO] crate nimiq-metrics-server 0.1.0 is already in cache
[INFO] checking nimiq-metrics-server-0.1.0 against try#8810c24b0958114d8dbb32d878444e8956fce80f for pr-66063
[INFO] extracting crate nimiq-metrics-server 0.1.0 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate nimiq-metrics-server 0.1.0 on toolchain 8810c24b0958114d8dbb32d878444e8956fce80f
[INFO] running `"/workspace/cargo-home/bin/cargo" "+8810c24b0958114d8dbb32d878444e8956fce80f" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate nimiq-metrics-server 0.1.0
[INFO] finished tweaking crates.io crate nimiq-metrics-server 0.1.0
[INFO] tweaked toml for crates.io crate nimiq-metrics-server 0.1.0 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+8810c24b0958114d8dbb32d878444e8956fce80f" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+8810c24b0958114d8dbb32d878444e8956fce80f" "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-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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=allow" "-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" "+8810c24b0958114d8dbb32d878444e8956fce80f" "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] 68b8d6ff9b422c667ee7620faa71253b685ca3551336faca8ea79e62970f8d25
[INFO] running `"docker" "start" "-a" "68b8d6ff9b422c667ee7620faa71253b685ca3551336faca8ea79e62970f8d25"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking nimiq-collections v0.1.0
[INFO] [stderr]     Checking weak-table v0.2.3
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]     Checking lmdb-zero v0.4.4
[INFO] [stderr]     Checking sha-1 v0.8.1
[INFO] [stderr]     Checking uuid v0.7.4
[INFO] [stderr]    Compiling beserial_derive v0.1.0
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/nimiq-collections-0.1.0/src/lib.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(box_into_raw_non_null)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/nimiq-collections-0.1.0/src/lib.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | #![feature(specialization)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/nimiq-collections-0.1.0/src/lib.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | #![feature(map_get_key_value)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[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: aborting due to 3 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: could not compile `nimiq-collections`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "68b8d6ff9b422c667ee7620faa71253b685ca3551336faca8ea79e62970f8d25"`
[INFO] running `"docker" "rm" "-f" "68b8d6ff9b422c667ee7620faa71253b685ca3551336faca8ea79e62970f8d25"`
[INFO] [stdout] 68b8d6ff9b422c667ee7620faa71253b685ca3551336faca8ea79e62970f8d25