[INFO] fetching crate promptune 0.1.2...
[INFO] testing promptune-0.1.2 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate promptune 0.1.2 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate promptune 0.1.2
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate promptune 0.1.2
[INFO] tweaked toml for crates.io crate promptune 0.1.2 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate promptune 0.1.2 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] crate crates.io crate promptune 0.1.2 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 6e0d67054aae44e53347757ee9c878db02d85711067ab7dcb20d30984481c0d4
[INFO] running `Command { std: "docker" "start" "-a" "6e0d67054aae44e53347757ee9c878db02d85711067ab7dcb20d30984481c0d4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6e0d67054aae44e53347757ee9c878db02d85711067ab7dcb20d30984481c0d4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6e0d67054aae44e53347757ee9c878db02d85711067ab7dcb20d30984481c0d4", kill_on_drop: false }`
[INFO] [stdout] 6e0d67054aae44e53347757ee9c878db02d85711067ab7dcb20d30984481c0d4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] af32068dc68537d6a234e58a8dab54019944132948ae6ec451bd432b58b9c7df
[INFO] running `Command { std: "docker" "start" "-a" "af32068dc68537d6a234e58a8dab54019944132948ae6ec451bd432b58b9c7df", kill_on_drop: false }`
[INFO] [stderr]    Compiling quote v1.0.42
[INFO] [stderr]    Compiling memchr v2.7.6
[INFO] [stderr]    Compiling bytes v1.11.0
[INFO] [stderr]    Compiling hashbrown v0.16.1
[INFO] [stderr]    Compiling find-msvc-tools v0.1.5
[INFO] [stderr]    Compiling slab v0.4.11
[INFO] [stderr]    Compiling vcpkg v0.2.15
[INFO] [stderr]    Compiling futures-task v0.3.31
[INFO] [stderr]    Compiling writeable v0.6.2
[INFO] [stderr]    Compiling litemap v0.8.1
[INFO] [stderr]    Compiling generic-array v0.14.7
[INFO] [stderr]    Compiling parking_lot_core v0.9.12
[INFO] [stderr]    Compiling mio v1.1.1
[INFO] [stderr]    Compiling signal-hook-registry v1.4.7
[INFO] [stderr]    Compiling socket2 v0.6.1
[INFO] [stderr]    Compiling tracing-core v0.1.35
[INFO] [stderr]    Compiling icu_properties_data v2.1.1
[INFO] [stderr]    Compiling syn v2.0.111
[INFO] [stderr]    Compiling cc v1.2.48
[INFO] [stderr]    Compiling icu_normalizer_data v2.1.1
[INFO] [stderr]    Compiling zerocopy v0.8.31
[INFO] [stderr]    Compiling openssl v0.10.75
[INFO] [stderr]    Compiling parking_lot v0.12.5
[INFO] [stderr]    Compiling indexmap v2.12.1
[INFO] [stderr]    Compiling percent-encoding v2.3.2
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling native-tls v0.2.14
[INFO] [stderr]    Compiling winnow v0.5.40
[INFO] [stderr]    Compiling getrandom v0.3.4
[INFO] [stderr]    Compiling serde_core v1.0.228
[INFO] [stderr]    Compiling http v1.4.0
[INFO] [stderr]    Compiling strsim v0.10.0
[INFO] [stderr]    Compiling arrayvec v0.7.6
[INFO] [stderr]    Compiling serde_json v1.0.145
[INFO] [stderr]    Compiling unicase v2.8.1
[INFO] [stderr]    Compiling openssl-probe v0.1.6
[INFO] [stderr]    Compiling tinyvec v1.10.0
[INFO] [stderr]    Compiling rand_core v0.9.3
[INFO] [stderr]    Compiling mime_guess v2.0.5
[INFO] [stderr]    Compiling form_urlencoded v1.2.2
[INFO] [stderr]    Compiling if_chain v1.0.3
[INFO] [stderr]    Compiling simd-adler32 v0.3.7
[INFO] [stderr]    Compiling heck v0.4.1
[INFO] [stderr]    Compiling ipnet v2.11.0
[INFO] [stderr]    Compiling ref-cast v1.0.25
[INFO] [stderr]    Compiling deranged v0.5.5
[INFO] [stderr]    Compiling crypto-common v0.1.7
[INFO] [stderr]    Compiling block-padding v0.3.3
[INFO] [stderr]    Compiling block-buffer v0.10.4
[INFO] [stderr]    Compiling miniz_oxide v0.8.9
[INFO] [stderr]    Compiling inout v0.1.4
[INFO] [stderr]    Compiling digest v0.10.7
[INFO] [stderr]    Compiling nom v8.0.0
[INFO] [stderr]    Compiling encoding_rs v0.8.35
[INFO] [stderr]    Compiling unicode-normalization v0.1.25
[INFO] [stderr]    Compiling cipher v0.4.4
[INFO] [stderr]    Compiling unicode-properties v0.1.4
[INFO] [stderr]    Compiling http-body v1.0.1
[INFO] [stderr]    Compiling http-body-util v0.1.3
[INFO] [stderr]    Compiling either v1.15.0
[INFO] [stderr]    Compiling minimal-lexical v0.2.1
[INFO] [stderr]    Compiling time-core v0.1.6
[INFO] [stderr]    Compiling bytecount v0.6.9
[INFO] [stderr]    Compiling iri-string v0.7.9
[INFO] [stderr]    Compiling openssl-sys v0.9.111
[INFO] [stderr]    Compiling ppv-lite86 v0.2.21
[INFO] [stderr]    Compiling chrono v0.4.42
[INFO] [stderr]    Compiling stringprep v0.1.5
[INFO] [stderr]    Compiling nom v7.1.3
[INFO] [stderr]    Compiling rayon v1.11.0
[INFO] [stderr]    Compiling toml_edit v0.19.15
[INFO] [stderr]    Compiling rand_chacha v0.9.0
[INFO] [stderr]    Compiling time v0.3.44
[INFO] [stderr]    Compiling rand v0.9.2
[INFO] [stderr]    Compiling convert_case v0.8.0
[INFO] [stderr]    Compiling ecb v0.1.2
[INFO] [stderr]    Compiling cbc v0.1.2
[INFO] [stderr]    Compiling aes v0.8.4
[INFO] [stderr]    Compiling flate2 v1.1.7
[INFO] [stderr]    Compiling rustls-pki-types v1.13.1
[INFO] [stderr]    Compiling sha2 v0.10.9
[INFO] [stderr]    Compiling md-5 v0.10.6
[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-2.0.111/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="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=d63903882855da81 -C extra-filename=-fd47c49796d750fc --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-2f6ea505ff82ebb0.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-39de46f98adae129.rmeta --extern unicode_ident=/opt/rustwide/target/debug/deps/libunicode_ident-78d3da9d81f84e3e.rmeta --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" "af32068dc68537d6a234e58a8dab54019944132948ae6ec451bd432b58b9c7df", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "af32068dc68537d6a234e58a8dab54019944132948ae6ec451bd432b58b9c7df", kill_on_drop: false }`
[INFO] [stdout] af32068dc68537d6a234e58a8dab54019944132948ae6ec451bd432b58b9c7df
