[INFO] fetching crate darling 0.13.0...
[INFO] testing darling-0.13.0 against 1.55.0 for beta-1.56-1
[INFO] extracting crate darling 0.13.0 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate darling 0.13.0 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate darling 0.13.0
[INFO] finished tweaking crates.io crate darling 0.13.0
[INFO] tweaked toml for crates.io crate darling 0.13.0 written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate crates.io crate darling 0.13.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6f9b4cc06e03462283fd6f5f9b939ad0c8e52f6e3b45ec756b7f30e583bba397
[INFO] running `Command { std: "docker" "start" "-a" "6f9b4cc06e03462283fd6f5f9b939ad0c8e52f6e3b45ec756b7f30e583bba397", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6f9b4cc06e03462283fd6f5f9b939ad0c8e52f6e3b45ec756b7f30e583bba397", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6f9b4cc06e03462283fd6f5f9b939ad0c8e52f6e3b45ec756b7f30e583bba397", kill_on_drop: false }`
[INFO] [stdout] 6f9b4cc06e03462283fd6f5f9b939ad0c8e52f6e3b45ec756b7f30e583bba397
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2b1f5505a4854c76bebd1b14cf95c0f26e7bd21fe9764760b34079c1988d6390
[INFO] running `Command { std: "docker" "start" "-a" "2b1f5505a4854c76bebd1b14cf95c0f26e7bd21fe9764760b34079c1988d6390", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.69
[INFO] [stderr]    Compiling proc-macro2 v1.0.26
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling darling_core v0.13.0
[INFO] [stderr]    Compiling darling_macro v0.13.0
[INFO] [stderr]    Compiling darling v0.13.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 15.51s
[INFO] running `Command { std: "docker" "inspect" "2b1f5505a4854c76bebd1b14cf95c0f26e7bd21fe9764760b34079c1988d6390", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2b1f5505a4854c76bebd1b14cf95c0f26e7bd21fe9764760b34079c1988d6390", kill_on_drop: false }`
[INFO] [stdout] 2b1f5505a4854c76bebd1b14cf95c0f26e7bd21fe9764760b34079c1988d6390
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 645a16f3fcf5934b9beb697971e3607ff8929ceac1afa1ce1237ba9e8ec6ec71
[INFO] running `Command { std: "docker" "start" "-a" "645a16f3fcf5934b9beb697971e3607ff8929ceac1afa1ce1237ba9e8ec6ec71", kill_on_drop: false }`
[INFO] [stderr]    Compiling darling v0.13.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `ident`
[INFO] [stdout]   --> tests/from_generics.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 |     pub ident: syn::Ident,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `darling`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name consume_fields --edition=2018 examples/consume_fields.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type bin --emit=dep-info,link -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="default"' --cfg 'feature="suggestions"' -C metadata=389245f88158c1a1 -C extra-filename=-389245f88158c1a1 --out-dir /opt/rustwide/target/debug/examples -L dependency=/opt/rustwide/target/debug/deps --extern darling=/opt/rustwide/target/debug/deps/libdarling-f13249ac41ed8832.rlib --extern darling_core=/opt/rustwide/target/debug/deps/libdarling_core-3fbb386d9bb46f7a.rlib --extern darling_macro=/opt/rustwide/target/debug/deps/libdarling_macro-4c0766e9018eb35d.so --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-0d4482de36fd9f09.rlib --extern quote=/opt/rustwide/target/debug/deps/libquote-bd2bf1812473246f.rlib --extern syn=/opt/rustwide/target/debug/deps/libsyn-fbee29721dd22826.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" "645a16f3fcf5934b9beb697971e3607ff8929ceac1afa1ce1237ba9e8ec6ec71", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "645a16f3fcf5934b9beb697971e3607ff8929ceac1afa1ce1237ba9e8ec6ec71", kill_on_drop: false }`
[INFO] [stdout] 645a16f3fcf5934b9beb697971e3607ff8929ceac1afa1ce1237ba9e8ec6ec71