[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-1.96-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmetastable-void%2Fmechanics-core" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-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-5-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-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] f1b5c31370fdb93b715663739cecde12006e3450e22245b1e8ab6566067131fb
[INFO] running `Command { std: "docker" "start" "-a" "f1b5c31370fdb93b715663739cecde12006e3450e22245b1e8ab6566067131fb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f1b5c31370fdb93b715663739cecde12006e3450e22245b1e8ab6566067131fb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f1b5c31370fdb93b715663739cecde12006e3450e22245b1e8ab6566067131fb", kill_on_drop: false }`
[INFO] [stdout] f1b5c31370fdb93b715663739cecde12006e3450e22245b1e8ab6566067131fb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 8d3fc123faa2f91df36c6a2e2629d3fa9f2d852fc93eb846bdd1367ab3d58629
[INFO] running `Command { std: "docker" "start" "-a" "8d3fc123faa2f91df36c6a2e2629d3fa9f2d852fc93eb846bdd1367ab3d58629", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.106
[INFO] [stderr]    Compiling unicode-ident v1.0.24
[INFO] [stderr]    Compiling quote v1.0.45
[INFO] [stderr]    Compiling libc v0.2.183
[INFO] [stderr]    Compiling stable_deref_trait v1.2.1
[INFO] [stderr]    Compiling bytes v1.11.1
[INFO] [stderr]    Compiling itoa v1.0.17
[INFO] [stderr]    Compiling pin-project-lite v0.2.17
[INFO] [stderr]    Compiling writeable v0.6.2
[INFO] [stderr]    Compiling futures-core v0.3.32
[INFO] [stderr]    Compiling litemap v0.8.1
[INFO] [stderr]    Compiling find-msvc-tools v0.1.9
[INFO] [stderr]    Compiling foldhash v0.2.0
[INFO] [stderr]    Compiling dunce v1.0.5
[INFO] [stderr]    Compiling fs_extra v1.3.0
[INFO] [stderr]    Compiling serde_core v1.0.228
[INFO] [stderr]    Compiling icu_properties_data v2.0.1
[INFO] [stderr]    Compiling memchr v2.8.0
[INFO] [stderr]    Compiling aws-lc-rs v1.16.1
[INFO] [stderr]    Compiling hashbrown v0.16.1
[INFO] [stderr]    Compiling icu_normalizer_data v2.0.0
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling slab v0.4.12
[INFO] [stderr]    Compiling siphasher v1.0.2
[INFO] [stderr]    Compiling rustls-pki-types v1.14.0
[INFO] [stderr]    Compiling phf_shared v0.13.1
[INFO] [stderr]    Compiling libm v0.2.15
[INFO] [stderr]    Compiling fastrand v2.3.0
[INFO] [stderr]    Compiling tracing-core v0.1.36
[INFO] [stderr]    Compiling static_assertions v1.1.0
[INFO] [stderr]    Compiling http v1.4.0
[INFO] [stderr]    Compiling icu_locale_data v2.0.0
[INFO] [stderr]    Compiling rustc-hash v2.1.1
[INFO] [stderr]    Compiling phf_generator v0.13.1
[INFO] [stderr]    Compiling fast-float2 v0.2.3
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling cow-utils v0.1.3
[INFO] [stderr]    Compiling zerocopy v0.8.40
[INFO] [stderr]    Compiling winnow v0.7.15
[INFO] [stderr]    Compiling zmij v1.0.21
[INFO] [stderr]    Compiling ryu-js v1.0.2
[INFO] [stderr]    Compiling futures-task v0.3.32
[INFO] [stderr]    Compiling rustls v0.23.37
[INFO] [stderr]    Compiling indexmap v2.13.0
[INFO] [stderr]    Compiling futures-sink v0.3.32
[INFO] [stderr]    Compiling futures-util v0.3.32
[INFO] [stderr]    Compiling tracing v0.1.44
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling futures-channel v0.3.32
[INFO] [stderr]    Compiling syn v2.0.117
[INFO] [stderr]    Compiling serde_json v1.0.149
[INFO] [stderr]    Compiling boa_string v0.21.0
[INFO] [stderr]    Compiling thin-vec v0.2.14
[INFO] [stderr]    Compiling http-body v1.0.1
[INFO] [stderr]    Compiling jobserver v0.1.34
[INFO] [stderr]    Compiling mio v1.1.1
[INFO] [stderr]    Compiling socket2 v0.6.3
[INFO] [stderr]    Compiling icu_calendar_data v2.0.0
[INFO] [stderr]    Compiling bitflags v2.11.0
[INFO] [stderr]    Compiling toml_datetime v1.0.0+spec-1.1.0
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling getrandom v0.3.4
[INFO] [stderr]    Compiling cc v1.2.56
[INFO] [stderr]    Compiling combine v4.6.7
[INFO] [stderr]    Compiling num-integer v0.1.46
[INFO] [stderr]    Compiling tokio v1.50.0
[INFO] [stderr]    Compiling rustversion v1.0.22
[INFO] [stderr]    Compiling float16 v0.1.5
[INFO] [stderr]    Compiling rand_core v0.9.5
[INFO] [stderr]    Compiling parking_lot_core v0.9.12
[INFO] [stderr]    Compiling crypto-common v0.1.7
[INFO] [stderr]    Compiling form_urlencoded v1.2.2
[INFO] [stderr]    Compiling sync_wrapper v1.0.2
[INFO] [stderr]    Compiling portable-atomic v1.13.1
[INFO] [stderr]    Compiling ipnet v2.12.0
[INFO] [stderr]    Compiling time-core v0.1.8
[INFO] [stderr]    Compiling jiff-tzdb v0.1.6
[INFO] [stderr]    Compiling futures-io v0.3.32
[INFO] [stderr]    Compiling openssl-probe v0.2.1
[INFO] [stderr]    Compiling num-conv v0.2.0
[INFO] [stderr]    Compiling thiserror v2.0.18
[INFO] [stderr]    Compiling getrandom v0.4.2
[INFO] [stderr]    Compiling core_maths v0.1.1
[INFO] [stderr]    Compiling time-macros v0.2.27
[INFO] [stderr]    Compiling rustls-native-certs v0.8.3
[INFO] [stderr]    Compiling futures-lite v2.6.1
[INFO] [stderr]    Compiling deranged v0.5.8
[INFO] [stderr]    Compiling digest v0.10.7
[INFO] [stderr]    Compiling memoffset v0.9.1
[INFO] [stderr]    Compiling regress v0.10.5
[INFO] [stderr]    Compiling iri-string v0.7.10
[INFO] [stderr]    Compiling fixedbitset v0.5.7
[INFO] [stderr]    Compiling cmake v0.1.57
[INFO] [stderr]    Compiling log v0.4.29
[INFO] [stderr]    Compiling toml_parser v1.0.9+spec-1.1.0
[INFO] [stderr]    Compiling either v1.15.0
[INFO] [stderr]    Compiling ixdtf v0.6.4
[INFO] [stderr]    Compiling num_threads v0.1.7
[INFO] [stderr]    Compiling itertools v0.14.0
[INFO] [stderr]    Compiling dashmap v6.1.0
[INFO] [stderr]    Compiling md-5 v0.10.6
[INFO] [stderr]    Compiling small_btree v0.1.0
[INFO] [stderr]    Compiling intrusive-collections v0.9.7
[INFO] [stderr]    Compiling aws-lc-sys v0.38.0
[INFO] [stderr]    Compiling toml_edit v0.25.4+spec-1.1.0
[INFO] [stderr]    Compiling http-body-util v0.1.3
[INFO] [stderr]    Compiling encoding_rs v0.8.35
[INFO] [stderr]    Compiling sha1_smol v1.0.1
[INFO] [stderr]    Compiling tag_ptr v0.1.0
[INFO] [stderr]    Compiling iana-time-zone v0.1.64
[INFO] [stderr]    Compiling xsum v0.1.6
[INFO] [stderr]    Compiling time v0.3.47
[INFO] [stderr]    Compiling tap v1.0.1
[INFO] [stderr]    Compiling parking_lot v0.12.5
[INFO] [stderr]    Compiling hex v0.4.3
[INFO] [stderr]    Compiling data-encoding v2.10.0
[INFO] [stderr]    Compiling proc-macro-crate v3.5.0
[INFO] [stderr]    Compiling synstructure v0.13.2
[INFO] [stderr]    Compiling displaydoc v0.2.5
[INFO] [stderr]    Compiling zerovec-derive v0.11.2
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]    Compiling phf_macros v0.13.1
[INFO] [stderr]    Compiling bytemuck_derive v1.10.2
[INFO] [stderr]    Compiling pin-project-internal v1.1.11
[INFO] [stderr]    Compiling equator-macro v0.4.2
[INFO] [stderr]    Compiling thiserror-impl v2.0.18
[INFO] [stderr]    Compiling dynify-macros v0.1.2
[INFO] [stderr]    Compiling zerofrom-derive v0.1.6
[INFO] [stderr]    Compiling yoke-derive v0.8.1
[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" "8d3fc123faa2f91df36c6a2e2629d3fa9f2d852fc93eb846bdd1367ab3d58629", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8d3fc123faa2f91df36c6a2e2629d3fa9f2d852fc93eb846bdd1367ab3d58629", kill_on_drop: false }`
[INFO] [stdout] 8d3fc123faa2f91df36c6a2e2629d3fa9f2d852fc93eb846bdd1367ab3d58629