[INFO] fetching crate polars-mongo 0.2.0...
[INFO] testing polars-mongo-0.2.0 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate polars-mongo 0.2.0 into /workspace/builds/worker-2-tc2/source
[INFO] removed /workspace/builds/worker-2-tc2/source/rust-toolchain
[INFO] started tweaking crates.io crate polars-mongo 0.2.0
[INFO] finished tweaking crates.io crate polars-mongo 0.2.0
[INFO] tweaked toml for crates.io crate polars-mongo 0.2.0 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate polars-mongo 0.2.0 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] 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]      Locking 351 packages to latest compatible versions
[INFO] [stderr]       Adding async-executor v1.5.1 (available: v1.14.0)
[INFO] [stderr]       Adding async-global-executor v2.3.1 (available: v2.4.1)
[INFO] [stderr]       Adding async-std v1.12.0 (available: v1.13.2)
[INFO] [stderr]       Adding generic-array v0.14.7 (available: v0.14.9)
[INFO] [stderr]       Adding mongodb v2.8.2 (available: v3.6.0)
[INFO] [stderr]       Adding polars v0.24.3 (available: v0.53.0)
[INFO] [stderr]       Adding polars-core v0.24.3 (available: v0.53.0)
[INFO] [stderr]       Adding polars-io v0.24.3 (available: v0.24.4)
[INFO] [stderr]       Adding polars-lazy v0.24.3 (available: v0.24.4)
[INFO] [stderr]       Adding polars-ops v0.24.3 (available: v0.24.4)
[INFO] [stderr]       Adding polars-time v0.24.3 (available: v0.24.4)
[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-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] d2238fcc11e141e9011929e7602910d8f078cb2958fd47220ce80ab236ca2f06
[INFO] running `Command { std: "docker" "start" "-a" "d2238fcc11e141e9011929e7602910d8f078cb2958fd47220ce80ab236ca2f06", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d2238fcc11e141e9011929e7602910d8f078cb2958fd47220ce80ab236ca2f06", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d2238fcc11e141e9011929e7602910d8f078cb2958fd47220ce80ab236ca2f06", kill_on_drop: false }`
[INFO] [stdout] d2238fcc11e141e9011929e7602910d8f078cb2958fd47220ce80ab236ca2f06
[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] 20b51d11ff8d59d33466253c4ea2d5b2ef5ddfb280a93a53090c9ea7b93cd748
[INFO] running `Command { std: "docker" "start" "-a" "20b51d11ff8d59d33466253c4ea2d5b2ef5ddfb280a93a53090c9ea7b93cd748", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling value-bag v1.12.0
[INFO] [stderr]    Compiling lexical-util v0.8.5
[INFO] [stderr]    Compiling ahash v0.7.8
[INFO] [stderr]    Compiling either v1.15.0
[INFO] [stderr]    Compiling getrandom v0.2.17
[INFO] [stderr]    Compiling parking_lot_core v0.9.12
[INFO] [stderr]    Compiling zerovec-derive v0.11.3
[INFO] [stderr]    Compiling num-integer v0.1.46
[INFO] [stderr]    Compiling zerofrom-derive v0.1.7
[INFO] [stderr]    Compiling yoke-derive v0.8.2
[INFO] [stderr]    Compiling generic-array v0.14.7
[INFO] [stderr]    Compiling chrono v0.4.44
[INFO] [stderr]    Compiling bytemuck_derive v1.10.2
[INFO] [stderr]    Compiling rustix v1.1.4
[INFO] [stderr]    Compiling unicode-segmentation v1.13.2
[INFO] [stderr]    Compiling io-lifetimes v1.0.11
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling log v0.4.29
[INFO] [stderr]    Compiling parking_lot v0.12.5
[INFO] [stderr]    Compiling rayon v1.12.0
[INFO] [stderr]    Compiling num-bigint v0.4.6
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling event-listener v2.5.3
[INFO] [stderr]    Compiling lexical-parse-integer v0.8.6
[INFO] [stderr]    Compiling lexical-write-integer v0.8.5
[INFO] [stderr]    Compiling lexical-parse-float v0.8.5
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]    Compiling num-iter v0.1.45
[INFO] [stderr]    Compiling rand v0.8.6
[INFO] [stderr]    Compiling lexical-write-float v0.8.5
[INFO] [stderr]    Compiling ring v0.17.14
[INFO] [stderr]    Compiling num-complex v0.4.6
[INFO] [stderr]    Compiling indexmap v1.9.3
[INFO] [stderr]    Compiling mio v0.8.11
[INFO] [stderr]    Compiling smartstring v1.0.1
[INFO] [stderr]    Compiling zerofrom v0.1.7
[INFO] [stderr]    Compiling yoke v0.8.2
[INFO] [stderr]    Compiling futures-lite v2.6.1
[INFO] [stderr]    Compiling lexical-core v0.8.5
[INFO] [stderr]    Compiling polling v2.8.0
[INFO] [stderr]    Compiling waker-fn v1.2.0
[INFO] [stderr]    Compiling hash_hasher v2.0.4
[INFO] [stderr]    Compiling rustix v0.37.28
[INFO] [stderr]    Compiling linux-raw-sys v0.12.1
[INFO] [stderr]    Compiling foreign_vec v0.1.0
[INFO] [stderr]    Compiling zerotrie v0.2.4
[INFO] [stderr]    Compiling simdutf8 v0.1.5
[INFO] [stderr]    Compiling fastrand v1.9.0
[INFO] [stderr]    Compiling ethnum v1.5.3
[INFO] [stderr]    Compiling zerovec v0.11.6
[INFO] [stderr]    Compiling signal-hook-mio v0.2.5
[INFO] [stderr]    Compiling futures-lite v1.13.0
[INFO] [stderr]    Compiling crossterm v0.23.2
[INFO] [stderr]    Compiling async-lock v2.8.0
[INFO] [stderr]    Compiling crypto-common v0.1.7
[INFO] [stderr]    Compiling bytemuck v1.25.0
[INFO] [stderr]    Compiling num-rational v0.4.2
[INFO] [stderr]    Compiling block-buffer v0.10.4
[INFO] [stderr]    Compiling tokio-macros v2.7.0
[INFO] [stderr]    Compiling event-listener v5.4.1
[INFO] [stderr]    Compiling tinystr v0.8.3
[INFO] [stderr]    Compiling potential_utf v0.1.5
[INFO] [stderr]    Compiling num v0.4.3
[INFO] [stderr]    Compiling async-io v1.13.0
[INFO] [stderr]    Compiling icu_collections v2.2.0
[INFO] [stderr]    Compiling strum v0.23.0
[INFO] [stderr]    Compiling icu_locale_core v2.2.0
[INFO] [stderr]    Compiling linux-raw-sys v0.3.8
[INFO] [stderr]    Compiling digest v0.10.7
[INFO] [stderr]    Compiling event-listener-strategy v0.5.4
[INFO] [stderr]    Compiling rand_distr v0.4.3
[INFO] [stderr]    Compiling socket2 v0.4.10
[INFO] [stderr]    Compiling hashbrown v0.12.3
[INFO] [stderr]    Compiling polars-utils v0.24.4
[INFO] [stderr]    Compiling fastrand v2.4.1
[INFO] [stderr]    Compiling tokio v1.52.1
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling futures-util v0.3.32
[INFO] [stderr]    Compiling rustix v0.38.44
[INFO] [stderr]    Compiling async-channel v2.5.0
[INFO] [stderr]    Compiling matches v0.1.10
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling idna v0.2.3
[INFO] [stderr]    Compiling piper v0.2.5
[INFO] [stderr]    Compiling async-executor v1.5.1
[INFO] [stderr]    Compiling lexical v6.1.1
[INFO] [stderr]    Compiling async-channel v1.9.0
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling blocking v1.6.2
[INFO] [stderr]    Compiling event-listener v3.1.0
[INFO] [stderr]    Compiling dirs-sys v0.3.7
[INFO] [stderr]    Compiling futures-channel v0.3.32
[INFO] [stderr]    Compiling icu_provider v2.2.0
[INFO] [stderr]    Compiling linked-hash-map v0.5.6
[INFO] [stderr]    Compiling rustls v0.21.12
[INFO] [stderr]    Compiling icu_normalizer v2.2.0
[INFO] [stderr]    Compiling icu_properties v2.2.0
[INFO] [stderr]    Compiling data-encoding v2.11.0
[INFO] [stderr]    Compiling time-macros v0.2.27
[INFO] [stderr]    Compiling dirs v4.0.0
[INFO] [stderr]    Compiling lru-cache v0.1.2
[INFO] [stderr]    Compiling rustc_version_runtime v0.2.1
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling rand_chacha v0.9.0
[INFO] [stderr]    Compiling kv-log-macro v1.0.7
[INFO] [stderr]    Compiling memmap2 v0.5.10
[INFO] [stderr]    Compiling csv-core v0.1.13
[INFO] [stderr]    Compiling time-core v0.1.8
[INFO] [stderr]    Compiling resolv-conf v0.7.6
[INFO] [stderr]    Compiling rand v0.9.4
[INFO] [stderr]    Compiling uuid v1.23.1
[INFO] [stderr]    Compiling serde_json v1.0.149
[INFO] [stderr]    Compiling ahash v0.8.12
[INFO] [stderr]    Compiling serde_bytes v0.11.19
[INFO] [stderr]    Compiling derive_more v0.99.20
[INFO] [stderr]    Compiling sha-1 v0.10.1
[INFO] [stderr]    Compiling sha2 v0.10.9
[INFO] [stderr]    Compiling hmac v0.12.1
[INFO] [stderr]    Compiling pbkdf2 v0.11.0
[INFO] [stderr]    Compiling md-5 v0.10.6
[INFO] [stderr]    Compiling idna_adapter v1.2.1
[INFO] [stderr]    Compiling base64 v0.13.1
[INFO] [stderr]    Compiling webpki-roots v0.25.4
[INFO] [stderr]    Compiling darling_core v0.13.4
[INFO] [stderr]    Compiling idna v1.1.0
[INFO] [stderr]    Compiling take_mut v0.2.2
[INFO] [stderr]    Compiling time v0.3.47
[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="full"' --cfg 'feature="parsing"' --cfg 'feature="printing"' --cfg 'feature="proc-macro"' --cfg 'feature="quote"' --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", "quote", "test", "visit", "visit-mut"))' -C metadata=2cbb9d1df97cbf05 -C extra-filename=-2649e7b37377aa89 --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" "20b51d11ff8d59d33466253c4ea2d5b2ef5ddfb280a93a53090c9ea7b93cd748", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "20b51d11ff8d59d33466253c4ea2d5b2ef5ddfb280a93a53090c9ea7b93cd748", kill_on_drop: false }`
[INFO] [stdout] 20b51d11ff8d59d33466253c4ea2d5b2ef5ddfb280a93a53090c9ea7b93cd748
