[INFO] fetching crate unc-chain-configs 0.12.2...
[INFO] testing unc-chain-configs-0.12.2 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate unc-chain-configs 0.12.2 into /workspace/builds/worker-7-tc2/source
[INFO] started tweaking crates.io crate unc-chain-configs 0.12.2
[INFO] finished tweaking crates.io crate unc-chain-configs 0.12.2
[INFO] tweaked toml for crates.io crate unc-chain-configs 0.12.2 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate unc-chain-configs 0.12.2 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 522 packages to latest compatible versions
[INFO] [stderr]       Adding bytesize v1.3.3 (available: v2.3.1)
[INFO] [stderr]       Adding derive_more v0.99.20 (available: v2.1.1)
[INFO] [stderr]       Adding generic-array v0.14.7 (available: v0.14.9)
[INFO] [stderr]       Adding num-rational v0.3.2 (available: v0.4.2)
[INFO] [stderr]       Adding sha2 v0.10.9 (available: v0.11.0)
[INFO] [stderr]       Adding smart-default v0.6.0 (available: v0.7.1)
[INFO] [stderr]       Adding wasmprinter v0.2.57 (available: v0.2.80)
[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-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 9d1994676b6c669d7d3640fbe8e2c2ad8714c8e6a8da61b4c909fd64c277a3aa
[INFO] running `Command { std: "docker" "start" "-a" "9d1994676b6c669d7d3640fbe8e2c2ad8714c8e6a8da61b4c909fd64c277a3aa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9d1994676b6c669d7d3640fbe8e2c2ad8714c8e6a8da61b4c909fd64c277a3aa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9d1994676b6c669d7d3640fbe8e2c2ad8714c8e6a8da61b4c909fd64c277a3aa", kill_on_drop: false }`
[INFO] [stdout] 9d1994676b6c669d7d3640fbe8e2c2ad8714c8e6a8da61b4c909fd64c277a3aa
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 519f22d9d3bb0ffb93dbab6664ebd480ca219a29016ec11f7f94581df9e6ddce
[INFO] running `Command { std: "docker" "start" "-a" "519f22d9d3bb0ffb93dbab6664ebd480ca219a29016ec11f7f94581df9e6ddce", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde_core v1.0.228
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling smallvec v1.15.1
[INFO] [stderr]    Compiling indexmap v1.9.3
[INFO] [stderr]    Compiling syn v2.0.117
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling generic-array v0.14.7
[INFO] [stderr]    Compiling libm v0.2.16
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling ahash v0.7.8
[INFO] [stderr]    Compiling target-lexicon v0.12.16
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling socket2 v0.6.3
[INFO] [stderr]    Compiling mio v1.2.0
[INFO] [stderr]    Compiling indexmap v2.14.0
[INFO] [stderr]    Compiling ahash v0.8.12
[INFO] [stderr]    Compiling hashbrown v0.12.3
[INFO] [stderr]    Compiling parking_lot_core v0.9.12
[INFO] [stderr]    Compiling either v1.15.0
[INFO] [stderr]    Compiling futures-io v0.3.32
[INFO] [stderr]    Compiling rkyv v0.7.46
[INFO] [stderr]    Compiling rand v0.8.6
[INFO] [stderr]    Compiling futures-util v0.3.32
[INFO] [stderr]    Compiling rustix v1.1.4
[INFO] [stderr]    Compiling seahash v4.1.0
[INFO] [stderr]    Compiling parking_lot v0.12.5
[INFO] [stderr]    Compiling hashbrown v0.14.5
[INFO] [stderr]    Compiling winnow v1.0.2
[INFO] [stderr]    Compiling subtle v2.6.1
[INFO] [stderr]    Compiling cranelift-isle v0.101.4
[INFO] [stderr]    Compiling block-buffer v0.10.4
[INFO] [stderr]    Compiling crypto-common v0.1.7
[INFO] [stderr]    Compiling leb128 v0.2.6
[INFO] [stderr]    Compiling digest v0.10.7
[INFO] [stderr]    Compiling libc v0.2.186
[INFO] [stderr]    Compiling itertools v0.10.5
[INFO] [stderr]    Compiling cranelift-codegen-shared v0.101.4
[INFO] [stderr]    Compiling toml_datetime v1.1.1+spec-1.1.0
[INFO] [stderr]    Compiling cranelift-codegen-meta v0.101.4
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling region v3.0.2
[INFO] [stderr]    Compiling memmap2 v0.5.10
[INFO] [stderr]    Compiling crc32fast v1.5.0
[INFO] [stderr]    Compiling more-asserts v0.2.2
[INFO] [stderr]    Compiling borsh v1.6.1
[INFO] [stderr]    Compiling hashbrown v0.13.2
[INFO] [stderr]    Compiling toml_parser v1.1.2+spec-1.1.0
[INFO] [stderr]    Compiling blake3 v0.3.8
[INFO] [stderr]    Compiling byteorder v1.5.0
[INFO] [stderr]    Compiling rustc-hash v1.1.0
[INFO] [stderr]    Compiling base64ct v1.8.3
[INFO] [stderr]    Compiling slice-group-by v0.3.1
[INFO] [stderr]    Compiling toml_edit v0.25.11+spec-1.1.0
[INFO] [stderr]    Compiling which v4.4.2
[INFO] [stderr]    Compiling regalloc2 v0.9.3
[INFO] [stderr]    Compiling aho-corasick v1.1.4
[INFO] [stderr]    Compiling num-integer v0.1.46
[INFO] [stderr]    Compiling pem-rfc7468 v0.7.0
[INFO] [stderr]    Compiling sha2 v0.10.9
[INFO] [stderr]    Compiling crypto-mac v0.8.0
[INFO] [stderr]    Compiling digest v0.9.0
[INFO] [stderr]    Compiling proc-macro-crate v3.5.0
[INFO] [stderr]    Compiling num-bigint v0.3.3
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]    Compiling arrayvec v0.5.2
[INFO] [stderr]    Compiling regex-syntax v0.8.10
[INFO] [stderr]    Compiling bumpalo v3.20.2
[INFO] [stderr]    Compiling getrandom v0.4.2
[INFO] [stderr]    Compiling der v0.7.10
[INFO] [stderr]    Compiling prost-build v0.9.0
[INFO] [stderr]    Compiling rustc_version v0.4.1
[INFO] [stderr]    Compiling wasmer-vm-x v2.4.1
[INFO] [stderr]    Compiling memoffset v0.8.0
[INFO] [stderr]    Compiling num-rational v0.3.2
[INFO] [stderr]    Compiling finite-wasm v0.5.0
[INFO] [stderr]    Compiling tempfile v3.27.0
[INFO] [stderr]    Compiling petgraph v0.6.5
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling borsh-schema-derive-internal v0.9.3
[INFO] [stderr]    Compiling curve25519-dalek v4.1.3
[INFO] [stderr]    Compiling borsh-derive-internal v0.9.3
[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=2018 /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/syn-1.0.109/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no --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="quote"' --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values("clone-impls", "default", "derive", "extra-traits", "fold", "full", "parsing", "printing", "proc-macro", "quote", "test", "visit", "visit-mut"))' -C metadata=7da38405bcca0016 -C extra-filename=-a1f0c123522cb805 --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.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-544fd508281ca8af.rmeta --extern unicode_ident=/opt/rustwide/target/debug/deps/libunicode_ident-423507c85e36a25a.rmeta --cap-lints allow --cap-lints=warn --cfg syn_disable_nightly_tests` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "519f22d9d3bb0ffb93dbab6664ebd480ca219a29016ec11f7f94581df9e6ddce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "519f22d9d3bb0ffb93dbab6664ebd480ca219a29016ec11f7f94581df9e6ddce", kill_on_drop: false }`
[INFO] [stdout] 519f22d9d3bb0ffb93dbab6664ebd480ca219a29016ec11f7f94581df9e6ddce
