[INFO] fetching crate yummy-delta 0.0.8...
[INFO] testing yummy-delta-0.0.8 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate yummy-delta 0.0.8 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate yummy-delta 0.0.8
[INFO] finished tweaking crates.io crate yummy-delta 0.0.8
[INFO] tweaked toml for crates.io crate yummy-delta 0.0.8 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate yummy-delta 0.0.8 on toolchain beta-2026-04-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 428 packages to latest compatible versions
[INFO] [stderr]       Adding arrow v28.0.0 (available: v58.1.0)
[INFO] [stderr]       Adding datafusion v19.0.0 (available: v53.1.0)
[INFO] [stderr]       Adding deltalake v0.8.0 (available: v0.32.0)
[INFO] [stderr]       Adding derive_more v0.99.20 (available: v2.1.1)
[INFO] [stderr]       Adding env_logger v0.9.3 (available: v0.11.10)
[INFO] [stderr]       Adding flatbuffers v22.9.29 (available: v22.12.6)
[INFO] [stderr]       Adding generic-array v0.14.7 (available: v0.14.9)
[INFO] [stderr]       Adding itertools v0.10.5 (available: v0.14.0)
[INFO] [stderr]       Adding prost-build v0.11.6 (available: v0.11.9)
[INFO] [stderr]       Adding pyo3 v0.16.6 (available: v0.28.3)
[INFO] [stderr]       Adding reqwest v0.11.27 (available: v0.13.2)
[INFO] [stderr]       Adding thiserror v1.0.69 (available: v2.0.18)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0a9505598d841bef556504c56c17ff2bb15417fd1b4131f11b3bfa77213f0e81
[INFO] running `Command { std: "docker" "start" "-a" "0a9505598d841bef556504c56c17ff2bb15417fd1b4131f11b3bfa77213f0e81", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0a9505598d841bef556504c56c17ff2bb15417fd1b4131f11b3bfa77213f0e81", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0a9505598d841bef556504c56c17ff2bb15417fd1b4131f11b3bfa77213f0e81", kill_on_drop: false }`
[INFO] [stdout] 0a9505598d841bef556504c56c17ff2bb15417fd1b4131f11b3bfa77213f0e81
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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" "RUSTDOCFLAGS=--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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5b915cfca2b34475640976bb618dd1af22018718db5f4e9da7622ff2762f4ab0
[INFO] running `Command { std: "docker" "start" "-a" "5b915cfca2b34475640976bb618dd1af22018718db5f4e9da7622ff2762f4ab0", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.186
[INFO] [stderr]    Compiling libm v0.2.16
[INFO] [stderr]    Compiling serde_core v1.0.228
[INFO] [stderr]    Compiling zerocopy v0.8.48
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling smallvec v1.15.1
[INFO] [stderr]    Compiling crunchy v0.2.4
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling tiny-keccak v2.0.2
[INFO] [stderr]    Compiling ahash v0.8.12
[INFO] [stderr]    Compiling static_assertions v1.1.0
[INFO] [stderr]    Compiling aho-corasick v1.1.4
[INFO] [stderr]    Compiling zerocopy-derive v0.8.48
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]    Compiling tracing v0.1.44
[INFO] [stderr]    Compiling futures-macro v0.3.32
[INFO] [stderr]    Compiling lexical-util v0.8.5
[INFO] [stderr]    Compiling arrow-schema v33.0.0
[INFO] [stderr]    Compiling either v1.15.0
[INFO] [stderr]    Compiling typenum v1.20.0
[INFO] [stderr]    Compiling icu_normalizer v2.2.0
[INFO] [stderr]    Compiling rustls v0.21.12
[INFO] [stderr]    Compiling indexmap v1.9.3
[INFO] [stderr]    Compiling itertools v0.10.5
[INFO] [stderr]    Compiling getrandom v0.4.2
[INFO] [stderr]    Compiling simd-adler32 v0.3.9
[INFO] [stderr]    Compiling lexical-parse-integer v0.8.6
[INFO] [stderr]    Compiling lexical-write-integer v0.8.5
[INFO] [stderr]    Compiling rand_core v0.10.1
[INFO] [stderr]    Compiling lexical-parse-float v0.8.5
[INFO] [stderr]    Compiling idna_adapter v1.2.1
[INFO] [stderr]    Compiling lexical-write-float v0.8.5
[INFO] [stderr]    Compiling idna v1.1.0
[INFO] [stderr]    Compiling miniz_oxide v0.8.9
[INFO] [stderr]    Compiling flatbuffers v23.5.26
[INFO] [stderr]    Compiling futures-util v0.3.32
[INFO] [stderr]    Compiling csv-core v0.1.13
[INFO] [stderr]    Compiling regex-automata v0.4.14
[INFO] [stderr]    Compiling lexical-core v0.8.5
[INFO] [stderr]    Compiling doc-comment v0.3.4
[INFO] [stderr]    Compiling url v2.5.8
[INFO] [stderr]    Compiling flate2 v1.1.9
[INFO] [stderr]    Compiling zstd-safe v6.0.6
[INFO] [stderr] error: could not compile `serde_derive` (lib)
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/beta-2026-04-21-x86_64-unknown-linux-gnu/bin/rustc --crate-name serde_derive --edition=2021 /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/serde_derive-1.0.228/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type proc-macro --emit=dep-info,link -C prefer-dynamic -C embed-bitcode=no --cfg 'feature="default"' --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values("default", "deserialize_in_place"))' -C metadata=c65e5b2c0d561074 -C extra-filename=-e566dc65f9b76f1b --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-0fa97b1aa44f5fda.rlib --extern quote=/opt/rustwide/target/debug/deps/libquote-544fd508281ca8af.rlib --extern syn=/opt/rustwide/target/debug/deps/libsyn-db35dfc171bce774.rlib --extern proc_macro --cap-lints allow --cap-lints=warn` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "5b915cfca2b34475640976bb618dd1af22018718db5f4e9da7622ff2762f4ab0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5b915cfca2b34475640976bb618dd1af22018718db5f4e9da7622ff2762f4ab0", kill_on_drop: false }`
[INFO] [stdout] 5b915cfca2b34475640976bb618dd1af22018718db5f4e9da7622ff2762f4ab0
