[INFO] fetching crate rustmeter 0.2.1...
[INFO] testing rustmeter-0.2.1 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate rustmeter 0.2.1 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate rustmeter 0.2.1
[INFO] finished tweaking crates.io crate rustmeter 0.2.1
[INFO] tweaked toml for crates.io crate rustmeter 0.2.1 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate rustmeter 0.2.1 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 rustmeter 0.2.1 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-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] 7a3b5439612c47c83aca28a793a37e21a07cfdfb73a52132a434fc8f936518f5
[INFO] running `Command { std: "docker" "start" "-a" "7a3b5439612c47c83aca28a793a37e21a07cfdfb73a52132a434fc8f936518f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7a3b5439612c47c83aca28a793a37e21a07cfdfb73a52132a434fc8f936518f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7a3b5439612c47c83aca28a793a37e21a07cfdfb73a52132a434fc8f936518f5", kill_on_drop: false }`
[INFO] [stdout] 7a3b5439612c47c83aca28a793a37e21a07cfdfb73a52132a434fc8f936518f5
[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] 1cbb9dc15d71853c69f19d45202dcb626c974c0ac8893dd5162eca2a37c16d7a
[INFO] running `Command { std: "docker" "start" "-a" "1cbb9dc15d71853c69f19d45202dcb626c974c0ac8893dd5162eca2a37c16d7a", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.103
[INFO] [stderr]    Compiling quote v1.0.42
[INFO] [stderr]    Compiling serde_core v1.0.228
[INFO] [stderr]    Compiling libc v0.2.178
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling find-msvc-tools v0.1.5
[INFO] [stderr]    Compiling libm v0.2.15
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling stable_deref_trait v1.2.1
[INFO] [stderr]    Compiling thiserror v2.0.17
[INFO] [stderr]    Compiling zerocopy v0.8.31
[INFO] [stderr]    Compiling memchr v2.7.6
[INFO] [stderr]    Compiling rayon-core v1.13.0
[INFO] [stderr]    Compiling tracing-core v0.1.35
[INFO] [stderr]    Compiling scopeguard v1.2.0
[INFO] [stderr]    Compiling rustls-pki-types v1.13.2
[INFO] [stderr]    Compiling serde_json v1.0.145
[INFO] [stderr]    Compiling foldhash v0.1.5
[INFO] [stderr]    Compiling iana-time-zone v0.1.64
[INFO] [stderr]    Compiling rustls v0.23.36
[INFO] [stderr]    Compiling lock_api v0.4.14
[INFO] [stderr]    Compiling virtue v0.0.18
[INFO] [stderr]    Compiling openssl-probe v0.2.0
[INFO] [stderr]    Compiling unty v0.0.4
[INFO] [stderr]    Compiling zlib-rs v0.5.2
[INFO] [stderr]    Compiling rustls-native-certs v0.8.3
[INFO] [stderr]    Compiling array-init-cursor v0.2.1
[INFO] [stderr]    Compiling slotmap v1.1.1
[INFO] [stderr]    Compiling simdutf8 v0.1.5
[INFO] [stderr]    Compiling humantime v2.3.0
[INFO] [stderr]    Compiling polars-utils v0.51.0
[INFO] [stderr]    Compiling zstd-safe v7.2.4
[INFO] [stderr]    Compiling phf_shared v0.12.1
[INFO] [stderr]    Compiling object v0.32.2
[INFO] [stderr]    Compiling polars-schema v0.51.0
[INFO] [stderr]    Compiling rustix v1.1.2
[INFO] [stderr]    Compiling chrono-tz v0.10.4
[INFO] [stderr]    Compiling phf v0.12.1
[INFO] [stderr]    Compiling polars-arrow v0.51.0
[INFO] [stderr]    Compiling debug_unsafe v0.1.3
[INFO] [stderr]    Compiling atoi_simd v0.16.1
[INFO] [stderr]    Compiling generic-array v0.14.7
[INFO] [stderr]    Compiling streaming-iterator v0.1.9
[INFO] [stderr]    Compiling syn v2.0.111
[INFO] [stderr]    Compiling ethnum v1.5.2
[INFO] [stderr]    Compiling polars-compute v0.51.0
[INFO] [stderr]    Compiling strength_reduce v0.2.4
[INFO] [stderr]    Compiling fast-float2 v0.2.3
[INFO] [stderr]    Compiling bincode_derive v2.0.1
[INFO] [stderr]    Compiling ref-cast v1.0.25
[INFO] [stderr]    Compiling unicode-width v0.2.2
[INFO] [stderr]    Compiling litrs v1.0.0
[INFO] [stderr]    Compiling jobserver v0.1.34
[INFO] [stderr]    Compiling boxcar v0.2.14
[INFO] [stderr]    Compiling fallible-streaming-iterator v0.1.9
[INFO] [stderr]    Compiling unicode-segmentation v1.12.0
[INFO] [stderr]    Compiling polars-core v0.51.0
[INFO] [stderr]    Compiling alloc-no-stdlib v2.0.4
[INFO] [stderr]    Compiling rmp v0.8.14
[INFO] [stderr]    Compiling mio v1.1.1
[INFO] [stderr]    Compiling socket2 v0.6.1
[INFO] [stderr]    Compiling getrandom v0.3.4
[INFO] [stderr]    Compiling getrandom v0.2.16
[INFO] [stderr]    Compiling cc v1.2.49
[INFO] [stderr]    Compiling rand_core v0.9.3
[INFO] [stderr]    Compiling parking_lot_core v0.9.12
[INFO] [stderr]    Compiling errno v0.3.14
[INFO] [stderr]    Compiling memmap2 v0.9.9
[INFO] [stderr]    Compiling crypto-common v0.1.7
[INFO] [stderr]    Compiling signal-hook-registry v1.4.8
[INFO] [stderr]    Compiling block-buffer v0.10.4
[INFO] [stderr]    Compiling document-features v0.2.12
[INFO] [stderr]    Compiling float-cmp v0.10.0
[INFO] [stderr]    Compiling alloc-stdlib v0.2.2
[INFO] [stderr]    Compiling tinyvec v1.10.0
[INFO] [stderr]    Compiling parking_lot v0.12.5
[INFO] [stderr]    Compiling digest v0.10.7
[INFO] [stderr]    Compiling polars-ops v0.51.0
[INFO] [stderr]    Compiling xxhash-rust v0.8.15
[INFO] [stderr]    Compiling signal-hook v0.3.18
[INFO] [stderr]    Compiling snap v1.1.1
[INFO] [stderr]    Compiling brotli-decompressor v5.0.0
[INFO] [stderr]    Compiling unicode-reverse v1.0.9
[INFO] [stderr]    Compiling argminmax v0.6.3
[INFO] [stderr]    Compiling sha2 v0.10.9
[INFO] [stderr]    Compiling streaming-decompression v0.1.2
[INFO] [stderr]    Compiling unicode-normalization v0.1.25
[INFO] [stderr]    Compiling libudev-sys v0.1.4
[INFO] [stderr]    Compiling home v0.5.12
[INFO] [stderr]    Compiling winnow v0.7.14
[INFO] [stderr]    Compiling smallvec v1.15.1
[INFO] [stderr]    Compiling toml_datetime v0.7.4+spec-1.0.0
[INFO] [stderr]    Compiling cfg_aliases v0.2.1
[INFO] [stderr]    Compiling percent-encoding v2.3.2
[INFO] [stderr]    Compiling nix v0.30.1
[INFO] [stderr]    Compiling crossbeam-queue v0.3.12
[INFO] [stderr]    Compiling brotli v8.0.2
[INFO] [stderr]    Compiling ar_archive_writer v0.2.0
[INFO] [stderr]    Compiling polars-plan v0.51.0
[INFO] [stderr]    Compiling form_urlencoded v1.2.2
[INFO] [stderr]    Compiling crossbeam-channel v0.5.15
[INFO] [stderr]    Compiling polars-stream v0.51.0
[INFO] [stderr]    Compiling io-lifetimes v1.0.11
[INFO] [stderr]    Compiling csv-core v0.1.13
[INFO] [stderr]    Compiling no_std_io2 v0.8.1
[INFO] [stderr]    Compiling polars-lazy v0.51.0
[INFO] [stderr]    Compiling data-encoding v2.9.0
[INFO] [stderr]    Compiling libz-rs-sys v0.5.2
[INFO] [stderr]    Compiling rustix v0.38.44
[INFO] [stderr]    Compiling peg-runtime v0.8.5
[INFO] [stderr]    Compiling portable-atomic v1.11.1
[INFO] [stderr]    Compiling bitflags v2.10.0
[INFO] [stderr]    Compiling indexmap v2.12.1
[INFO] [stderr]    Compiling log v0.4.29
[INFO] [stderr]    Compiling flate2 v1.1.5
[INFO] [stderr]    Compiling ring v0.17.14
[INFO] [stderr]    Compiling psm v0.1.28
[INFO] [stderr]    Compiling stacker v0.1.22
[INFO] [stderr]    Compiling zstd-sys v2.0.16+zstd.1.5.7
[INFO] [stderr]    Compiling lz4-sys v1.11.1+lz4-1.10.0
[INFO] [stderr]    Compiling raw-cpuid v11.6.0
[INFO] [stderr]    Compiling uuid v1.19.0
[INFO] [stderr]    Compiling blake3 v1.8.3
[INFO] [stderr]    Compiling toml_parser v1.0.5+spec-1.0.0
[INFO] [stderr]    Compiling hidapi v2.6.3
[INFO] [stderr]    Compiling serde_stacker v0.1.14
[INFO] [stderr]    Compiling twox-hash v2.1.2
[INFO] [stderr]    Compiling object v0.38.0
[INFO] [stderr]    Compiling heapless v0.9.2
[INFO] [stderr]    Compiling nix v0.26.4
[INFO] [stderr]    Compiling ruzstd v0.8.2
[INFO] [stderr]    Compiling csv v1.4.0
[INFO] [stderr]    Compiling synstructure v0.13.2
[INFO] [stderr]    Compiling darling_core v0.20.11
[INFO] [stderr]    Compiling toml_edit v0.23.10+spec-1.0.0
[INFO] [stderr]    Compiling serde_with v3.16.1
[INFO] [stderr]    Compiling peg-macros v0.8.5
[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" "1cbb9dc15d71853c69f19d45202dcb626c974c0ac8893dd5162eca2a37c16d7a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1cbb9dc15d71853c69f19d45202dcb626c974c0ac8893dd5162eca2a37c16d7a", kill_on_drop: false }`
[INFO] [stdout] 1cbb9dc15d71853c69f19d45202dcb626c974c0ac8893dd5162eca2a37c16d7a
