[INFO] cloning repository https://github.com/metastable-void/mechanics-core
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/metastable-void/mechanics-core" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmetastable-void%2Fmechanics-core", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmetastable-void%2Fmechanics-core'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3c458faf593e6c6658662760af83ab06e39985e7
[INFO] testing metastable-void/mechanics-core against beta-2026-04-21 for beta-1.96-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmetastable-void%2Fmechanics-core" "/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/metastable-void/mechanics-core
[INFO] finished tweaking git repo https://github.com/metastable-void/mechanics-core
[INFO] tweaked toml for git repo https://github.com/metastable-void/mechanics-core written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/metastable-void/mechanics-core 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/metastable-void/mechanics-core 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]     Updating crates.io index
[INFO] [stderr]      Locking 1 package to latest Rust 1.88 compatible version
[INFO] [stderr]       Adding mechanics-config v0.1.0
[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] 010b1f2e53721860daac240d49e555e5df35ef90838cea3f66ce31c72ddbc5c2
[INFO] running `Command { std: "docker" "start" "-a" "010b1f2e53721860daac240d49e555e5df35ef90838cea3f66ce31c72ddbc5c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "010b1f2e53721860daac240d49e555e5df35ef90838cea3f66ce31c72ddbc5c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "010b1f2e53721860daac240d49e555e5df35ef90838cea3f66ce31c72ddbc5c2", kill_on_drop: false }`
[INFO] [stdout] 010b1f2e53721860daac240d49e555e5df35ef90838cea3f66ce31c72ddbc5c2
[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] d4b3a33bf6c54e5ab1ccb7de483cd42d343be2d29200ac6116dd17c9a4f2818d
[INFO] running `Command { std: "docker" "start" "-a" "d4b3a33bf6c54e5ab1ccb7de483cd42d343be2d29200ac6116dd17c9a4f2818d", kill_on_drop: false }`
[INFO] [stderr]    Compiling stable_deref_trait v1.2.1
[INFO] [stderr]    Compiling writeable v0.6.2
[INFO] [stderr]    Compiling litemap v0.8.1
[INFO] [stderr]    Compiling serde_core v1.0.228
[INFO] [stderr]    Compiling memchr v2.8.0
[INFO] [stderr]    Compiling http v1.4.0
[INFO] [stderr]    Compiling hashbrown v0.16.1
[INFO] [stderr]    Compiling aws-lc-rs v1.16.1
[INFO] [stderr]    Compiling siphasher v1.0.2
[INFO] [stderr]    Compiling mio v1.1.1
[INFO] [stderr]    Compiling cc v1.2.56
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling paste v1.0.15
[INFO] [stderr]    Compiling zerofrom v0.1.6
[INFO] [stderr]    Compiling fastrand v2.3.0
[INFO] [stderr]    Compiling libm v0.2.15
[INFO] [stderr]    Compiling ryu-js v1.0.2
[INFO] [stderr]    Compiling yoke v0.8.1
[INFO] [stderr]    Compiling phf_shared v0.13.1
[INFO] [stderr]    Compiling icu_locale_data v2.0.0
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling futures-task v0.3.32
[INFO] [stderr]    Compiling winnow v0.7.15
[INFO] [stderr]    Compiling cow-utils v0.1.3
[INFO] [stderr]    Compiling zerocopy v0.8.40
[INFO] [stderr]    Compiling zerovec v0.11.5
[INFO] [stderr]    Compiling zerotrie v0.2.3
[INFO] [stderr]    Compiling tokio v1.50.0
[INFO] [stderr]    Compiling rustc-hash v2.1.1
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling futures-util v0.3.32
[INFO] [stderr]    Compiling boa_macros v0.21.0
[INFO] [stderr]    Compiling indexmap v2.13.0
[INFO] [stderr]    Compiling phf_generator v0.13.1
[INFO] [stderr]    Compiling phf_macros v0.13.1
[INFO] [stderr]    Compiling boa_string v0.21.0
[INFO] [stderr]    Compiling tracing v0.1.44
[INFO] [stderr]    Compiling futures-channel v0.3.32
[INFO] [stderr]    Compiling icu_calendar_data v2.0.0
[INFO] [stderr]    Compiling thin-vec v0.2.14
[INFO] [stderr]    Compiling toml_datetime v1.0.0+spec-1.1.0
[INFO] [stderr]    Compiling combine v4.6.7
[INFO] [stderr]    Compiling http-body v1.0.1
[INFO] [stderr]    Compiling phf v0.13.1
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling num-integer v0.1.46
[INFO] [stderr]    Compiling cmake v0.1.57
[INFO] [stderr]    Compiling bytemuck_derive v1.10.2
[INFO] [stderr]    Compiling float16 v0.1.5
[INFO] [stderr]    Compiling crypto-common v0.1.7
[INFO] [stderr]    Compiling form_urlencoded v1.2.2
[INFO] [stderr]    Compiling equator-macro v0.4.2
[INFO] [stderr]    Compiling getrandom v0.4.2
[INFO] [stderr]    Compiling tinystr v0.8.2
[INFO] [stderr]    Compiling potential_utf v0.1.4
[INFO] [stderr]    Compiling core_maths v0.1.1
[INFO] [stderr]    Compiling futures-io v0.3.32
[INFO] [stderr]    Compiling icu_locale_core v2.1.1
[INFO] [stderr]    Compiling boa_gc v0.21.0
[INFO] [stderr]    Compiling calendrical_calculations v0.2.3
[INFO] [stderr]    Compiling icu_collections v2.0.0
[INFO] [stderr]    Compiling aws-lc-sys v0.38.0
[INFO] [stderr]    Compiling toml_parser v1.0.9+spec-1.1.0
[INFO] [stderr]    Compiling num-conv v0.2.0
[INFO] [stderr]    Compiling jiff-tzdb v0.1.6
[INFO] [stderr]    Compiling thiserror v2.0.18
[INFO] [stderr]    Compiling time-core v0.1.8
[INFO] [stderr]    Compiling portable-atomic v1.13.1
[INFO] [stderr]    Compiling futures-lite v2.6.1
[INFO] [stderr]    Compiling equator v0.4.2
[INFO] [stderr]    Compiling time-macros v0.2.27
[INFO] [stderr]    Compiling toml_edit v0.25.4+spec-1.1.0
[INFO] [stderr]    Compiling digest v0.10.7
[INFO] [stderr]    Compiling boa_interner v0.21.0
[INFO] [stderr]    Compiling serde_json v1.0.149
[INFO] [stderr]    Compiling bytemuck v1.25.0
[INFO] [stderr]    Compiling regress v0.10.5
[INFO] [stderr]    Compiling dynify-macros v0.1.2
[INFO] [stderr]    Compiling either v1.15.0
[INFO] [stderr]    Compiling icu_provider v2.1.1
[INFO] [stderr]    Compiling num-bigint v0.4.6
[INFO] [stderr]    Compiling arrayvec v0.7.6
[INFO] [stderr]    Compiling fixedbitset v0.5.7
[INFO] [stderr]    Compiling ixdtf v0.6.4
[INFO] [stderr]    Compiling iri-string v0.7.10
[INFO] [stderr]    Compiling small_btree v0.1.0
[INFO] [stderr]    Compiling icu_properties v2.0.2
[INFO] [stderr]    Compiling icu_normalizer v2.0.1
[INFO] [stderr]    Compiling tokio-util v0.7.18
[INFO] [stderr]    Compiling proc-macro-crate v3.5.0
[INFO] [stderr]    Compiling icu_locale v2.0.0
[INFO] [stderr]    Compiling tower v0.5.3
[INFO] [stderr]    Compiling time v0.3.47
[INFO] [stderr]    Compiling dynify v0.1.2
[INFO] [stderr]    Compiling idna_adapter v1.2.1
[INFO] [stderr]    Compiling idna v1.1.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.21
[INFO] [stderr] error: could not compile `regress` (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 regress --edition=2024 /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/regress-0.10.5/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 --cfg 'feature="backend-pikevm"' --cfg 'feature="default"' --cfg 'feature="std"' --cfg 'feature="utf16"' --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values("backend-pikevm", "default", "index-positions", "pattern", "prohibit-unsafe", "std", "utf16"))' -C metadata=466d269b24cbef2a -C extra-filename=-012cab798cb96196 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern hashbrown=/opt/rustwide/target/debug/deps/libhashbrown-fa8703e903ad1d77.rmeta --extern memchr=/opt/rustwide/target/debug/deps/libmemchr-9c99a16d1eb4a64c.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" "d4b3a33bf6c54e5ab1ccb7de483cd42d343be2d29200ac6116dd17c9a4f2818d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d4b3a33bf6c54e5ab1ccb7de483cd42d343be2d29200ac6116dd17c9a4f2818d", kill_on_drop: false }`
[INFO] [stdout] d4b3a33bf6c54e5ab1ccb7de483cd42d343be2d29200ac6116dd17c9a4f2818d