[INFO] fetching crate darling 0.13.4...
[INFO] testing darling-0.13.4 against 1.60.0 for beta-1.61-1
[INFO] extracting crate darling 0.13.4 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate darling 0.13.4 on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate darling 0.13.4
[INFO] finished tweaking crates.io crate darling 0.13.4
[INFO] tweaked toml for crates.io crate darling 0.13.4 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate crates.io crate darling 0.13.4 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "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" "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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6002d552215cbcadc1b8e11a4fb9ba9115ce00f9be56b187baff73f17dd2525f
[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" "6002d552215cbcadc1b8e11a4fb9ba9115ce00f9be56b187baff73f17dd2525f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6002d552215cbcadc1b8e11a4fb9ba9115ce00f9be56b187baff73f17dd2525f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6002d552215cbcadc1b8e11a4fb9ba9115ce00f9be56b187baff73f17dd2525f", kill_on_drop: false }`
[INFO] [stdout] 6002d552215cbcadc1b8e11a4fb9ba9115ce00f9be56b187baff73f17dd2525f
[INFO] running `Command { std: "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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 53fc26d55b48ea23920d45692916bb00ca28877593533117ecc632e23d404c83
[INFO] running `Command { std: "docker" "start" "-a" "53fc26d55b48ea23920d45692916bb00ca28877593533117ecc632e23d404c83", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]    Compiling darling_core v0.13.4
[INFO] [stderr]    Compiling darling_macro v0.13.4
[INFO] [stderr]    Compiling darling v0.13.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 23.97s
[INFO] running `Command { std: "docker" "inspect" "53fc26d55b48ea23920d45692916bb00ca28877593533117ecc632e23d404c83", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "53fc26d55b48ea23920d45692916bb00ca28877593533117ecc632e23d404c83", kill_on_drop: false }`
[INFO] [stdout] 53fc26d55b48ea23920d45692916bb00ca28877593533117ecc632e23d404c83
[INFO] running `Command { std: "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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] f491e6001804c71c46814263b319a4ca4ed501f7b486c34bb7ce624a57f4d35e
[INFO] running `Command { std: "docker" "start" "-a" "f491e6001804c71c46814263b319a4ca4ed501f7b486c34bb7ce624a57f4d35e", kill_on_drop: false }`
[INFO] [stderr]    Compiling darling v0.13.4 (/opt/rustwide/workdir)
[INFO] [stderr] error: could not compile `darling`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name from_variant --edition=2018 tests/from_variant.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --emit=dep-info,link -C embed-bitcode=no -C debuginfo=2 --test --cfg 'feature="default"' --cfg 'feature="suggestions"' -C metadata=0b62843f742b1ae7 -C extra-filename=-0b62843f742b1ae7 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern darling=/opt/rustwide/target/debug/deps/libdarling-6f19ce6b42a96c19.rlib --extern darling_core=/opt/rustwide/target/debug/deps/libdarling_core-f49c3d0dc868eba7.rlib --extern darling_macro=/opt/rustwide/target/debug/deps/libdarling_macro-7ae7eb12e1f8e669.so --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-242efc09b7ec223c.rlib --extern quote=/opt/rustwide/target/debug/deps/libquote-8272c5f1de751f47.rlib --extern syn=/opt/rustwide/target/debug/deps/libsyn-9d1fc14092796c81.rlib --cap-lints=warn` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "f491e6001804c71c46814263b319a4ca4ed501f7b486c34bb7ce624a57f4d35e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f491e6001804c71c46814263b319a4ca4ed501f7b486c34bb7ce624a57f4d35e", kill_on_drop: false }`
[INFO] [stdout] f491e6001804c71c46814263b319a4ca4ed501f7b486c34bb7ce624a57f4d35e