[INFO] fetching crate rebels 1.6.0...
[INFO] testing rebels-1.6.0 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate rebels 1.6.0 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate rebels 1.6.0
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate rebels 1.6.0
[INFO] tweaked toml for crates.io crate rebels 1.6.0 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate rebels 1.6.0 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] crate crates.io crate rebels 1.6.0 already has a lockfile, it will not be regenerated
[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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 8fa61f37693c3e94548457c6333dbc64eed20f546e97582005aab8c43779d82e
[INFO] running `Command { std: "docker" "start" "-a" "8fa61f37693c3e94548457c6333dbc64eed20f546e97582005aab8c43779d82e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8fa61f37693c3e94548457c6333dbc64eed20f546e97582005aab8c43779d82e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8fa61f37693c3e94548457c6333dbc64eed20f546e97582005aab8c43779d82e", kill_on_drop: false }`
[INFO] [stdout] 8fa61f37693c3e94548457c6333dbc64eed20f546e97582005aab8c43779d82e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 53a488cab7014e940c8fca3b533159491f70f0003416c824291052db6d68eb95
[INFO] running `Command { std: "docker" "start" "-a" "53a488cab7014e940c8fca3b533159491f70f0003416c824291052db6d68eb95", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.106
[INFO] [stderr]    Compiling unicode-ident v1.0.24
[INFO] [stderr]    Compiling quote v1.0.45
[INFO] [stderr]    Compiling libc v0.2.183
[INFO] [stderr]    Compiling cfg-if v1.0.4
[INFO] [stderr]    Compiling serde_core v1.0.228
[INFO] [stderr]    Compiling memchr v2.8.0
[INFO] [stderr]    Compiling pin-project-lite v0.2.17
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling futures-core v0.3.32
[INFO] [stderr]    Compiling futures-sink v0.3.32
[INFO] [stderr]    Compiling smallvec v1.15.1
[INFO] [stderr]    Compiling stable_deref_trait v1.2.1
[INFO] [stderr]    Compiling slab v0.4.12
[INFO] [stderr]    Compiling portable-atomic v1.13.1
[INFO] [stderr]    Compiling zerocopy v0.8.47
[INFO] [stderr]    Compiling futures-io v0.3.32
[INFO] [stderr]    Compiling futures-task v0.3.32
[INFO] [stderr]    Compiling autocfg v1.5.0
[INFO] [stderr]    Compiling futures-channel v0.3.32
[INFO] [stderr]    Compiling critical-section v1.2.0
[INFO] [stderr]    Compiling version_check v0.9.5
[INFO] [stderr]    Compiling shlex v1.3.0
[INFO] [stderr]    Compiling find-msvc-tools v0.1.9
[INFO] [stderr]    Compiling libm v0.2.16
[INFO] [stderr]    Compiling typenum v1.19.0
[INFO] [stderr]    Compiling subtle v2.6.1
[INFO] [stderr]    Compiling thiserror v2.0.18
[INFO] [stderr]    Compiling litemap v0.8.1
[INFO] [stderr]    Compiling parking_lot_core v0.9.12
[INFO] [stderr]    Compiling equivalent v1.0.2
[INFO] [stderr]    Compiling either v1.15.0
[INFO] [stderr]    Compiling writeable v0.6.2
[INFO] [stderr]    Compiling icu_normalizer_data v2.1.1
[INFO] [stderr]    Compiling crossbeam-utils v0.8.21
[INFO] [stderr]    Compiling scopeguard v1.2.0
[INFO] [stderr]    Compiling icu_properties_data v2.1.2
[INFO] [stderr]    Compiling semver v1.0.27
[INFO] [stderr]    Compiling lock_api v0.4.14
[INFO] [stderr]    Compiling bitflags v2.11.0
[INFO] [stderr]    Compiling rustc_version v0.4.1
[INFO] [stderr]    Compiling syn v2.0.117
[INFO] [stderr]    Compiling generic-array v0.14.7
[INFO] [stderr]    Compiling percent-encoding v2.3.2
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling core2 v0.4.0
[INFO] [stderr]    Compiling byteorder v1.5.0
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]    Compiling static_assertions v1.1.0
[INFO] [stderr]    Compiling heck v0.5.0
[INFO] [stderr]    Compiling once_cell v1.21.4
[INFO] [stderr]    Compiling jobserver v0.1.34
[INFO] [stderr]    Compiling utf8_iter v1.0.4
[INFO] [stderr]    Compiling form_urlencoded v1.2.2
[INFO] [stderr]    Compiling cc v1.2.57
[INFO] [stderr]    Compiling cpufeatures v0.2.17
[INFO] [stderr]    Compiling data-encoding v2.10.0
[INFO] [stderr]    Compiling curve25519-dalek v4.1.3
[INFO] [stderr]    Compiling paste v1.0.15
[INFO] [stderr]    Compiling tracing-core v0.1.36
[INFO] [stderr]    Compiling block-buffer v0.10.4
[INFO] [stderr]    Compiling crypto-common v0.1.7
[INFO] [stderr]    Compiling unsigned-varint v0.8.0
[INFO] [stderr]    Compiling signature v2.2.0
[INFO] [stderr]    Compiling itoa v1.0.18
[INFO] [stderr]    Compiling digest v0.10.7
[INFO] [stderr]    Compiling ed25519 v2.2.3
[INFO] [stderr]    Compiling num-integer v0.1.46
[INFO] [stderr]    Compiling hmac v0.12.1
[INFO] [stderr]    Compiling sha2 v0.10.9
[INFO] [stderr]    Compiling quick-protobuf v0.8.1
[INFO] [stderr]    Compiling socket2 v0.6.3
[INFO] [stderr]    Compiling cmake v0.1.57
[INFO] [stderr]    Compiling getrandom v0.2.17
[INFO] [stderr]    Compiling const-str v0.4.3
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling parking_lot v0.12.5
[INFO] [stderr]    Compiling hkdf v0.12.4
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.18
[INFO] [stderr]    Compiling getrandom v0.3.4
[INFO] [stderr]    Compiling base-x v0.2.11
[INFO] [stderr]    Compiling bs58 v0.5.1
[INFO] [stderr]    Compiling web-time v1.1.0
[INFO] [stderr]    Compiling unsigned-varint v0.7.2
[INFO] [stderr]    Compiling dunce v1.0.5
[INFO] [stderr]    Compiling fs_extra v1.3.0
[INFO] [stderr]    Compiling futures-timer v3.0.3
[INFO] [stderr]    Compiling arrayref v0.3.9
[INFO] [stderr]    Compiling arrayvec v0.7.6
[INFO] [stderr]    Compiling allocator-api2 v0.2.21
[INFO] [stderr]    Compiling bytemuck v1.25.0
[INFO] [stderr]    Compiling log v0.4.29
[INFO] [stderr]    Compiling foldhash v0.1.5
[INFO] [stderr]    Compiling mio v1.1.1
[INFO] [stderr]    Compiling untrusted v0.9.0
[INFO] [stderr]    Compiling aws-lc-rs v1.16.2
[INFO] [stderr]    Compiling rayon-core v1.13.0
[INFO] [stderr]    Compiling rustversion v1.0.22
[INFO] [stderr]    Compiling thiserror v1.0.69
[INFO] [stderr]    Compiling ipnet v2.12.0
[INFO] [stderr]    Compiling hashbrown v0.15.5
[INFO] [stderr]    Compiling rand_core v0.9.5
[INFO] [stderr]    Compiling crossbeam-deque v0.8.6
[INFO] [stderr]    Compiling num-bigint v0.4.6
[INFO] [stderr]    Compiling anyhow v1.0.102
[INFO] [stderr]    Compiling getrandom v0.4.2
[INFO] [stderr]    Compiling hashbrown v0.16.1
[INFO] [stderr]    Compiling simd-adler32 v0.3.8
[INFO] [stderr]    Compiling synstructure v0.13.2
[INFO] [stderr]    Compiling strsim v0.11.1
[INFO] [stderr]    Compiling hashlink v0.10.0
[INFO] [stderr]    Compiling crc32fast v1.5.0
[INFO] [stderr]    Compiling rustls v0.23.37
[INFO] [stderr]    Compiling httparse v1.10.1
[INFO] [stderr]    Compiling tinyvec_macros v0.1.1
[INFO] [stderr]    Compiling adler2 v2.0.1
[INFO] [stderr]    Compiling cfg_aliases v0.2.1
[INFO] [stderr]    Compiling miniz_oxide v0.8.9
[INFO] [stderr]    Compiling nix v0.30.1
[INFO] [stderr]    Compiling indexmap v2.13.0
[INFO] [stderr]    Compiling rayon v1.11.0
[INFO] [stderr]    Compiling tinyvec v1.11.0
[INFO] [stderr]    Compiling netlink-packet-core v0.8.1
[INFO] [stderr]    Compiling errno v0.3.14
[INFO] [stderr]    Compiling num-complex v0.4.6
[INFO] [stderr]    Compiling ahash v0.8.12
[INFO] [stderr]    Compiling as-slice v0.2.1
[INFO] [stderr]    Compiling encoding_rs v0.8.35
[INFO] [stderr]    Compiling pkg-config v0.3.32
[INFO] [stderr]    Compiling num-rational v0.4.2
[INFO] [stderr]    Compiling base64 v0.22.1
[INFO] [stderr]    Compiling try-lock v0.2.5
[INFO] [stderr]    Compiling ident_case v1.0.1
[INFO] [stderr]    Compiling built v0.8.0
[INFO] [stderr]    Compiling av-scenechange v0.14.1
[INFO] [stderr]    Compiling atomic-waker v1.1.2
[INFO] [stderr]    Compiling signal-hook v0.3.18
[INFO] [stderr]    Compiling tower-service v0.3.3
[INFO] [stderr]    Compiling darling_core v0.23.0
[INFO] [stderr]    Compiling want v0.3.1
[INFO] [stderr]    Compiling aligned v0.4.3
[INFO] [stderr]    Compiling signal-hook-registry v1.4.8
[INFO] [stderr]    Compiling concurrent-queue v2.5.0
[INFO] [stderr]    Compiling nom v8.0.0
[INFO] [stderr]    Compiling y4m v0.8.0
[INFO] [stderr]    Compiling bitflags v1.3.2
[INFO] [stderr]    Compiling quick-error v2.0.1
[INFO] [stderr]    Compiling parking v2.2.1
[INFO] [stderr]    Compiling ryu v1.0.23
[INFO] [stderr]    Compiling lazy_static v1.5.0
[INFO] [stderr]    Compiling pin-utils v0.1.0
[INFO] [stderr]    Compiling crunchy v0.2.4
[INFO] [stderr]    Compiling pastey v0.1.1
[INFO] [stderr]    Compiling rustix v0.38.44
[INFO] [stderr]    Compiling maybe-rayon v0.1.1
[INFO] [stderr]    Compiling symphonia-core v0.5.5
[INFO] [stderr]    Compiling event-listener v5.4.1
[INFO] [stderr]    Compiling netlink-packet-route v0.28.0
[INFO] [stderr]    Compiling uuid v1.22.0
[INFO] [stderr]    Compiling alsa-sys v0.3.1
[INFO] [stderr]    Compiling safe_arch v0.7.4
[INFO] [stderr]    Compiling simd_helpers v0.1.0
[INFO] [stderr]    Compiling snow v0.9.6
[INFO] [stderr]    Compiling bitstream-io v4.9.0
[INFO] [stderr]    Compiling rav1e v0.8.1
[INFO] [stderr]    Compiling aws-lc-sys v0.39.0
[INFO] [stderr]    Compiling libz-ng-sys v1.1.25
[INFO] [stderr]    Compiling ring v0.17.14
[INFO] [stderr]    Compiling matrixmultiply v0.3.10
[INFO] [stderr]    Compiling crossbeam-channel v0.5.15
[INFO] [stderr]    Compiling itertools v0.14.0
[INFO] [stderr]    Compiling aho-corasick v1.1.4
[INFO] [stderr] error: could not compile `syn` (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 syn --edition=2021 /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/syn-2.0.117/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata,link -C opt-level=3 -C embed-bitcode=no -C debug-assertions=on --cfg 'feature="clone-impls"' --cfg 'feature="default"' --cfg 'feature="derive"' --cfg 'feature="extra-traits"' --cfg 'feature="fold"' --cfg 'feature="full"' --cfg 'feature="parsing"' --cfg 'feature="printing"' --cfg 'feature="proc-macro"' --cfg 'feature="visit"' --cfg 'feature="visit-mut"' --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values("clone-impls", "default", "derive", "extra-traits", "fold", "full", "parsing", "printing", "proc-macro", "test", "visit", "visit-mut"))' -C metadata=0d55cfdc0dc376fe -C extra-filename=-01d29a0e2069ce31 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-89e2dfbb7280ca4a.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-3432548e54bfa6ba.rmeta --extern unicode_ident=/opt/rustwide/target/debug/deps/libunicode_ident-5e48103ec0e0f1b7.rmeta --cap-lints allow --cap-lints=warn` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `darling_core` (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 darling_core --edition=2021 /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/darling_core-0.23.0/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata,link -C opt-level=3 -C embed-bitcode=no -C debug-assertions=on --cfg 'feature="strsim"' --cfg 'feature="suggestions"' --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values("diagnostics", "serde", "strsim", "suggestions"))' -C metadata=8f85f751dc8e2490 -C extra-filename=-ae6f672b7d2f4207 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern ident_case=/opt/rustwide/target/debug/deps/libident_case-bd4c09def44121d0.rmeta --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-89e2dfbb7280ca4a.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-3432548e54bfa6ba.rmeta --extern strsim=/opt/rustwide/target/debug/deps/libstrsim-bfc18b1e68d7406d.rmeta --extern syn=/opt/rustwide/target/debug/deps/libsyn-01d29a0e2069ce31.rmeta --cap-lints allow --cap-lints=warn` (signal: 9, SIGKILL: kill)
[INFO] running `Command { std: "docker" "inspect" "53a488cab7014e940c8fca3b533159491f70f0003416c824291052db6d68eb95", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "53a488cab7014e940c8fca3b533159491f70f0003416c824291052db6d68eb95", kill_on_drop: false }`
[INFO] [stdout] 53a488cab7014e940c8fca3b533159491f70f0003416c824291052db6d68eb95
