[INFO] crate pallet-elections-phragmen 2.0.0-alpha.5 is already in cache
[INFO] checking pallet-elections-phragmen-2.0.0-alpha.5 against master#bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc for pr-70917
[INFO] extracting crate pallet-elections-phragmen 2.0.0-alpha.5 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate pallet-elections-phragmen 2.0.0-alpha.5 on toolchain bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc
[INFO] running `"/workspace/cargo-home/bin/cargo" "+bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate pallet-elections-phragmen 2.0.0-alpha.5
[INFO] finished tweaking crates.io crate pallet-elections-phragmen 2.0.0-alpha.5
[INFO] tweaked toml for crates.io crate pallet-elections-phragmen 2.0.0-alpha.5 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "+bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc" "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] c32406018dbadd7a8f28d078066c310a0b84793c8105ae78d959128ec2f15532
[INFO] running `"docker" "start" "-a" "c32406018dbadd7a8f28d078066c310a0b84793c8105ae78d959128ec2f15532"`
[INFO] [stderr]     Checking sp-phragmen v2.0.0-alpha.5
[INFO] [stderr]     Checking pallet-elections-phragmen v2.0.0-alpha.5 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0463]: can't find crate for `serde`
[INFO] [stderr]    --> src/lib.rs:985:2
[INFO] [stderr]     |
[INFO] [stderr] 985 |       frame_support::construct_runtime!(
[INFO] [stderr]     |  _____^
[INFO] [stderr] 986 | |         pub enum Test where
[INFO] [stderr] 987 | |             Block = Block,
[INFO] [stderr] 988 | |             NodeBlock = Block,
[INFO] [stderr] ...   |
[INFO] [stderr] 994 | |         }
[INFO] [stderr] 995 | |     );
[INFO] [stderr]     | |______^ can't find crate
[INFO] [stderr]     |
[INFO] [stderr]     = note: this error originates in a derive macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0463`.
[INFO] [stderr] error: could not compile `pallet-elections-phragmen`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "c32406018dbadd7a8f28d078066c310a0b84793c8105ae78d959128ec2f15532"`
[INFO] running `"docker" "rm" "-f" "c32406018dbadd7a8f28d078066c310a0b84793c8105ae78d959128ec2f15532"`
[INFO] [stdout] c32406018dbadd7a8f28d078066c310a0b84793c8105ae78d959128ec2f15532