[INFO] cloning repository https://github.com/helperfn/learning-db
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/helperfn/learning-db" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhelperfn%2Flearning-db", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhelperfn%2Flearning-db'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] edec87386c4170dc3afebee6ce97b8c66d1611d7
[INFO] testing helperfn/learning-db against beta-2026-04-21 for beta-1.96-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhelperfn%2Flearning-db" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/helperfn/learning-db
[INFO] finished tweaking git repo https://github.com/helperfn/learning-db
[INFO] tweaked toml for git repo https://github.com/helperfn/learning-db written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/helperfn/learning-db 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 git repo https://github.com/helperfn/learning-db 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-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 2d23c174b7797db5733e32b95848d138b3ac48419754871fb2af0fc2b26d5b09
[INFO] running `Command { std: "docker" "start" "-a" "2d23c174b7797db5733e32b95848d138b3ac48419754871fb2af0fc2b26d5b09", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2d23c174b7797db5733e32b95848d138b3ac48419754871fb2af0fc2b26d5b09", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2d23c174b7797db5733e32b95848d138b3ac48419754871fb2af0fc2b26d5b09", kill_on_drop: false }`
[INFO] [stdout] 2d23c174b7797db5733e32b95848d138b3ac48419754871fb2af0fc2b26d5b09
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] b3e62db6a1adb0f60e1f00e1be7bfd52a441992230a2369600bc584b73ee561d
[INFO] running `Command { std: "docker" "start" "-a" "b3e62db6a1adb0f60e1f00e1be7bfd52a441992230a2369600bc584b73ee561d", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.185
[INFO] [stderr]    Compiling bitflags v2.11.1
[INFO] [stderr]    Compiling once_cell v1.21.4
[INFO] [stderr]    Compiling serde_core v1.0.228
[INFO] [stderr]    Compiling zerocopy v0.8.48
[INFO] [stderr]    Compiling stable_deref_trait v1.2.1
[INFO] [stderr]    Compiling rustversion v1.0.22
[INFO] [stderr]    Compiling itoa v1.0.18
[INFO] [stderr]    Compiling lock_api v0.4.14
[INFO] [stderr]    Compiling either v1.15.0
[INFO] [stderr]    Compiling generic-array v0.14.7
[INFO] [stderr]    Compiling futures-sink v0.3.32
[INFO] [stderr]    Compiling uncased v0.9.10
[INFO] [stderr]    Compiling zerovec-derive v0.11.3
[INFO] [stderr]    Compiling zerofrom-derive v0.1.7
[INFO] [stderr]    Compiling yoke-derive v0.8.2
[INFO] [stderr]    Compiling tokio-macros v2.7.0
[INFO] [stderr]    Compiling litemap v0.8.2
[INFO] [stderr]    Compiling writeable v0.6.3
[INFO] [stderr]    Compiling futures-channel v0.3.32
[INFO] [stderr]    Compiling futures-macro v0.3.32
[INFO] [stderr]    Compiling futures-io v0.3.32
[INFO] [stderr]    Compiling utf8_iter v1.0.4
[INFO] [stderr]    Compiling tracing-core v0.1.36
[INFO] [stderr]    Compiling pkg-config v0.3.33
[INFO] [stderr]    Compiling icu_properties_data v2.2.0
[INFO] [stderr]    Compiling icu_normalizer_data v2.2.0
[INFO] [stderr]    Compiling slab v0.4.12
[INFO] [stderr]    Compiling siphasher v1.0.2
[INFO] [stderr]    Compiling libloading v0.8.9
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling block-padding v0.3.3
[INFO] [stderr]    Compiling smallvec v1.15.1
[INFO] [stderr]    Compiling getrandom v0.3.4
[INFO] [stderr]    Compiling subtle v2.6.1
[INFO] [stderr]    Compiling inout v0.1.4
[INFO] [stderr]    Compiling tracing v0.1.44
[INFO] [stderr]    Compiling iana-time-zone v0.1.65
[INFO] [stderr]    Compiling glob v0.3.3
[INFO] [stderr]    Compiling prettyplease v0.2.37
[INFO] [stderr]    Compiling rustix v0.38.44
[INFO] [stderr]    Compiling hashbrown v0.17.0
[INFO] [stderr]    Compiling percent-encoding v2.3.2
[INFO] [stderr]    Compiling aho-corasick v1.1.4
[INFO] [stderr]    Compiling linux-raw-sys v0.4.15
[INFO] [stderr]    Compiling futures-util v0.3.32
[INFO] [stderr]    Compiling regex-syntax v0.8.10
[INFO] [stderr]    Compiling byteorder v1.5.0
[INFO] [stderr]    Compiling zerofrom v0.1.7
[INFO] [stderr]    Compiling memchr v2.8.0
[INFO] [stderr]    Compiling form_urlencoded v1.2.2
[INFO] [stderr]    Compiling minimal-lexical v0.2.1
[INFO] [stderr]    Compiling yoke v0.8.2
[INFO] [stderr]    Compiling clang-sys v1.8.1
[INFO] [stderr]    Compiling indexmap v1.9.3
[INFO] [stderr]    Compiling semver v1.0.28
[INFO] [stderr]    Compiling rustix v1.1.4
[INFO] [stderr]    Compiling zerovec v0.11.6
[INFO] [stderr]    Compiling zerotrie v0.2.4
[INFO] [stderr]    Compiling bindgen v0.66.1
[INFO] [stderr]    Compiling home v0.5.12
[INFO] [stderr]    Compiling jobserver v0.1.34
[INFO] [stderr]    Compiling getrandom v0.2.17
[INFO] [stderr]    Compiling parking_lot_core v0.9.12
[INFO] [stderr]    Compiling errno v0.3.14
[INFO] [stderr]    Compiling socket2 v0.6.3
[INFO] [stderr]    Compiling parking_lot v0.12.5
[INFO] [stderr]    Compiling signal-hook-registry v1.4.8
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling mio v1.2.0
[INFO] [stderr]    Compiling cc v1.2.60
[INFO] [stderr]    Compiling crypto-common v0.1.7
[INFO] [stderr]    Compiling cipher v0.4.4
[INFO] [stderr]    Compiling indexmap v2.14.0
[INFO] [stderr]    Compiling nom v7.1.3
[INFO] [stderr]    Compiling tinystr v0.8.3
[INFO] [stderr]    Compiling potential_utf v0.1.5
[INFO] [stderr]    Compiling icu_collections v2.2.0
[INFO] [stderr]    Compiling rand_core v0.9.5
[INFO] [stderr]    Compiling icu_locale_core v2.2.0
[INFO] [stderr]    Compiling getrandom v0.4.2
[INFO] [stderr]    Compiling aes v0.8.4
[INFO] [stderr]    Compiling universal-hash v0.5.1
[INFO] [stderr]    Compiling regex-automata v0.4.14
[INFO] [stderr]    Compiling socket2 v0.5.10
[INFO] [stderr]    Compiling rustc_version v0.4.1
[INFO] [stderr]    Compiling chrono v0.4.44
[INFO] [stderr] error: could not compile `regex-syntax` (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 regex_syntax --edition=2021 /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/regex-syntax-0.8.10/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 -C debuginfo=2 --allow=unexpected_cfgs --check-cfg 'cfg(docsrs_regex)' --cfg 'feature="default"' --cfg 'feature="std"' --cfg 'feature="unicode"' --cfg 'feature="unicode-age"' --cfg 'feature="unicode-bool"' --cfg 'feature="unicode-case"' --cfg 'feature="unicode-gencat"' --cfg 'feature="unicode-perl"' --cfg 'feature="unicode-script"' --cfg 'feature="unicode-segment"' --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values("arbitrary", "default", "std", "unicode", "unicode-age", "unicode-bool", "unicode-case", "unicode-gencat", "unicode-perl", "unicode-script", "unicode-segment"))' -C metadata=7bb3ee42bbb41fa9 -C extra-filename=-2cfdfc3e5cb17812 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --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" "b3e62db6a1adb0f60e1f00e1be7bfd52a441992230a2369600bc584b73ee561d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b3e62db6a1adb0f60e1f00e1be7bfd52a441992230a2369600bc584b73ee561d", kill_on_drop: false }`
[INFO] [stdout] b3e62db6a1adb0f60e1f00e1be7bfd52a441992230a2369600bc584b73ee561d