[INFO] fetching crate preamble2 0.0.1...
[INFO] testing preamble2-0.0.1 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate preamble2 0.0.1 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate preamble2 0.0.1
[INFO] finished tweaking crates.io crate preamble2 0.0.1
[INFO] tweaked toml for crates.io crate preamble2 0.0.1 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate preamble2 0.0.1 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] 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 297 packages to latest compatible versions
[INFO] [stderr]       Adding gitignores v2.12.0 (available: v4.8.9)
[INFO] [stderr]       Adding image v0.24.9 (available: v0.25.10)
[INFO] [stderr]       Adding inquire v0.6.2 (available: v0.9.4)
[INFO] [stderr]       Adding leon v2.0.1 (available: v3.0.2)
[INFO] [stderr]       Adding ptree v0.4.0 (available: v0.5.2)
[INFO] [stderr]       Adding reqwest v0.11.27 (available: v0.13.2)
[INFO] [stderr]       Adding toml_edit v0.20.7 (available: v0.25.11+spec-1.1.0)
[INFO] [stderr]       Adding whoami v1.6.1 (available: v2.1.1)
[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] 27b14e6a1d85a14ecbd1dbe1464f38bd8d972879b9ccba5e9b54be6e4756940e
[INFO] running `Command { std: "docker" "start" "-a" "27b14e6a1d85a14ecbd1dbe1464f38bd8d972879b9ccba5e9b54be6e4756940e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "27b14e6a1d85a14ecbd1dbe1464f38bd8d972879b9ccba5e9b54be6e4756940e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "27b14e6a1d85a14ecbd1dbe1464f38bd8d972879b9ccba5e9b54be6e4756940e", kill_on_drop: false }`
[INFO] [stdout] 27b14e6a1d85a14ecbd1dbe1464f38bd8d972879b9ccba5e9b54be6e4756940e
[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] 4640dbe8df1187978b5ea39c7e8e87572970c18f79d745ce78174af537b9731f
[INFO] running `Command { std: "docker" "start" "-a" "4640dbe8df1187978b5ea39c7e8e87572970c18f79d745ce78174af537b9731f", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.8.0
[INFO] [stderr]    Compiling serde_core v1.0.228
[INFO] [stderr]    Compiling errno v0.3.14
[INFO] [stderr]    Compiling parking_lot_core v0.9.12
[INFO] [stderr]    Compiling openssl-sys v0.9.114
[INFO] [stderr]    Compiling openssl v0.10.78
[INFO] [stderr]    Compiling http v0.2.12
[INFO] [stderr]    Compiling openssl-macros v0.1.1
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling native-tls v0.2.18
[INFO] [stderr]    Compiling lexical-core v0.7.6
[INFO] [stderr]    Compiling openssl-probe v0.2.1
[INFO] [stderr]    Compiling socket2 v0.5.10
[INFO] [stderr]    Compiling nom v5.1.3
[INFO] [stderr]    Compiling arrayvec v0.5.2
[INFO] [stderr]    Compiling num-traits v0.1.43
[INFO] [stderr]    Compiling dirs-sys-next v0.1.2
[INFO] [stderr]    Compiling signal-hook-registry v1.4.8
[INFO] [stderr]    Compiling mio v0.8.11
[INFO] [stderr]    Compiling parking_lot v0.12.5
[INFO] [stderr]    Compiling serde v0.8.23
[INFO] [stderr]    Compiling aho-corasick v1.1.4
[INFO] [stderr]    Compiling futures-util v0.3.32
[INFO] [stderr]    Compiling linked-hash-map v0.5.6
[INFO] [stderr]    Compiling dirs-next v2.0.0
[INFO] [stderr]    Compiling signal-hook v0.3.18
[INFO] [stderr]    Compiling csv-core v0.1.13
[INFO] [stderr]    Compiling yaml-rust v0.4.5
[INFO] [stderr]    Compiling tokio v1.52.1
[INFO] [stderr]    Compiling rustls-pemfile v1.0.4
[INFO] [stderr]    Compiling url v2.5.8
[INFO] [stderr]    Compiling half v2.7.1
[INFO] [stderr]    Compiling jpeg-decoder v0.3.2
[INFO] [stderr]    Compiling ordered-float v2.10.1
[INFO] [stderr]    Compiling regex-automata v0.4.14
[INFO] [stderr]    Compiling http-body v0.4.6
[INFO] [stderr]    Compiling signal-hook-mio v0.2.5
[INFO] [stderr]    Compiling miette-derive v5.10.0
[INFO] [stderr]    Compiling zune-inflate v0.2.54
[INFO] [stderr]    Compiling dirs-sys v0.3.7
[INFO] [stderr]    Compiling fdeflate v0.3.7
[INFO] [stderr]    Compiling encoding_rs v0.8.35
[INFO] [stderr]    Compiling lazy_static v0.2.11
[INFO] [stderr]    Compiling bytemuck v1.25.0
[INFO] [stderr]    Compiling rust-ini v0.13.0
[INFO] [stderr]    Compiling sync_wrapper v0.1.2
[INFO] [stderr]    Compiling fixedbitset v0.4.2
[INFO] [stderr]    Compiling exr v1.74.0
[INFO] [stderr]    Compiling qoi v0.4.1
[INFO] [stderr]    Compiling petgraph v0.6.5
[INFO] [stderr]    Compiling png v0.17.16
[INFO] [stderr]    Compiling tint v1.0.1
[INFO] [stderr]    Compiling newline-converter v0.2.2
[INFO] [stderr]    Compiling directories v4.0.1
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling tiff v0.9.1
[INFO] [stderr]    Compiling crossterm v0.25.0
[INFO] [stderr]    Compiling miette v5.10.0
[INFO] [stderr]    Compiling term v0.7.0
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling serde_json v1.0.149
[INFO] [stderr] error: could not compile `futures-util` (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 futures_util --edition=2018 /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/futures-util-0.3.32/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 --warn=unreachable_pub --warn=unexpected_cfgs --warn=single_use_lifetimes --warn=rust_2018_idioms --warn=missing_debug_implementations --check-cfg 'cfg(futures_sanitizer)' --cfg 'feature="alloc"' --cfg 'feature="futures-io"' --cfg 'feature="io"' --cfg 'feature="memchr"' --cfg 'feature="slab"' --cfg 'feature="std"' --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values("alloc", "async-await", "async-await-macro", "bilock", "cfg-target-has-atomic", "channel", "compat", "default", "futures-channel", "futures-io", "futures-macro", "futures-sink", "futures_01", "io", "io-compat", "libc", "memchr", "portable-atomic", "sink", "slab", "spin", "std", "tokio-io", "unstable", "write-all-vectored"))' -C metadata=db16e55872b47030 -C extra-filename=-2ed604ea63e54684 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern futures_core=/opt/rustwide/target/debug/deps/libfutures_core-3f2014b84910caad.rmeta --extern futures_io=/opt/rustwide/target/debug/deps/libfutures_io-db39768d7d04483a.rmeta --extern futures_task=/opt/rustwide/target/debug/deps/libfutures_task-16f44b435b6f0168.rmeta --extern memchr=/opt/rustwide/target/debug/deps/libmemchr-8b09dcab5f206844.rmeta --extern pin_project_lite=/opt/rustwide/target/debug/deps/libpin_project_lite-dbd15b1f007a2c34.rmeta --extern slab=/opt/rustwide/target/debug/deps/libslab-229cf4143d039c7e.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" "4640dbe8df1187978b5ea39c7e8e87572970c18f79d745ce78174af537b9731f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4640dbe8df1187978b5ea39c7e8e87572970c18f79d745ce78174af537b9731f", kill_on_drop: false }`
[INFO] [stdout] 4640dbe8df1187978b5ea39c7e8e87572970c18f79d745ce78174af537b9731f