[INFO] cloning repository https://github.com/FyraLabs/backflow
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/FyraLabs/backflow" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FFyraLabs%2Fbackflow", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FFyraLabs%2Fbackflow'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 243dec2401f5e7504384a532bbd79a4aa2456055
[INFO] testing FyraLabs/backflow against beta-2026-03-05 for beta-1.95-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FFyraLabs%2Fbackflow" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/FyraLabs/backflow
[INFO] finished tweaking git repo https://github.com/FyraLabs/backflow
[INFO] tweaked toml for git repo https://github.com/FyraLabs/backflow written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/FyraLabs/backflow on toolchain beta-2026-03-05
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-03-05" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/FyraLabs/backflow 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-2026-03-05" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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-2026-03-05" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b6c6ff209e793e3f1b4cae7cc35198a56071a72beb84fba8d5a41163696eb8be
[INFO] running `Command { std: "docker" "start" "-a" "b6c6ff209e793e3f1b4cae7cc35198a56071a72beb84fba8d5a41163696eb8be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b6c6ff209e793e3f1b4cae7cc35198a56071a72beb84fba8d5a41163696eb8be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b6c6ff209e793e3f1b4cae7cc35198a56071a72beb84fba8d5a41163696eb8be", kill_on_drop: false }`
[INFO] [stdout] b6c6ff209e793e3f1b4cae7cc35198a56071a72beb84fba8d5a41163696eb8be
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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-2026-03-05" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0465ca553866128c59bfeaa028bef9037cbd8cfed9e931ae7317385a326812fd
[INFO] running `Command { std: "docker" "start" "-a" "0465ca553866128c59bfeaa028bef9037cbd8cfed9e931ae7317385a326812fd", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v2.0.103
[INFO] [stderr]    Compiling libc v0.2.174
[INFO] [stderr]    Compiling slab v0.4.10
[INFO] [stderr]    Compiling winnow v0.7.11
[INFO] [stderr]    Compiling toml_datetime v0.6.11
[INFO] [stderr]    Compiling concurrent-queue v2.5.0
[INFO] [stderr]    Compiling rustix v1.0.7
[INFO] [stderr]    Compiling futures-lite v2.6.0
[INFO] [stderr]    Compiling endi v1.1.0
[INFO] [stderr]    Compiling memoffset v0.9.1
[INFO] [stderr]    Compiling rustc_version v0.4.1
[INFO] [stderr]    Compiling libudev-sys v0.1.4
[INFO] [stderr]    Compiling sha1 v0.10.6
[INFO] [stderr]    Compiling tracy-client-sys v0.26.1
[INFO] [stderr]    Compiling nix v0.30.1
[INFO] [stderr]    Compiling event-listener v5.4.0
[INFO] [stderr]    Compiling rustls v0.23.27
[INFO] [stderr]    Compiling mime_guess v2.0.5
[INFO] [stderr]    Compiling rustls-webpki v0.103.3
[INFO] [stderr]    Compiling nix v0.29.0
[INFO] [stderr]    Compiling async-dropper-simple v0.2.6
[INFO] [stderr]    Compiling event-listener-strategy v0.5.4
[INFO] [stderr]    Compiling tracing-log v0.2.0
[INFO] [stderr]    Compiling tokio v1.45.1
[INFO] [stderr]    Compiling io-lifetimes v1.0.11
[INFO] [stderr]    Compiling nix v0.10.0
[INFO] [stderr]    Compiling async-lock v3.4.0
[INFO] [stderr]    Compiling async-channel v2.3.1
[INFO] [stderr]    Compiling async-executor v1.13.2
[INFO] [stderr]    Compiling async-broadcast v0.7.2
[INFO] [stderr]    Compiling blocking v1.6.1
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.18
[INFO] [stderr]    Compiling ordered-stream v0.2.0
[INFO] [stderr]    Compiling eyre v0.6.12
[INFO] [stderr]    Compiling toml_write v0.1.2
[INFO] [stderr]    Compiling ioctl-sys v0.5.2
[INFO] [stderr]    Compiling crossbeam-deque v0.8.6
[INFO] [stderr]    Compiling bitvec v1.0.1
[INFO] [stderr]    Compiling crossbeam-queue v0.3.12
[INFO] [stderr]    Compiling crossbeam-channel v0.5.15
[INFO] [stderr]    Compiling http-range-header v0.4.2
[INFO] [stderr]    Compiling custom_derive v0.1.7
[INFO] [stderr]    Compiling indenter v0.3.3
[INFO] [stderr]    Compiling enum_derive v0.1.7
[INFO] [stderr]    Compiling toml_edit v0.22.27
[INFO] [stderr]    Compiling crossbeam v0.8.4
[INFO] [stderr]    Compiling signal-hook-registry v1.4.5
[INFO] [stderr]    Compiling parking_lot_core v0.9.11
[INFO] [stderr]    Compiling mio v1.0.4
[INFO] [stderr]    Compiling socket2 v0.5.10
[INFO] [stderr]    Compiling getrandom v0.3.3
[INFO] [stderr]    Compiling iovec v0.1.4
[INFO] [stderr]    Compiling rand_core v0.9.3
[INFO] [stderr]    Compiling libudev v0.2.0
[INFO] [stderr]    Compiling bytes v0.4.12
[INFO] [stderr]    Compiling uinput-sys v0.1.7
[INFO] [stderr]    Compiling parking_lot v0.12.4
[INFO] [stderr]    Compiling rand_chacha v0.9.0
[INFO] [stderr]    Compiling dirs-sys v0.5.0
[INFO] [stderr]    Compiling dirs v6.0.0
[INFO] [stderr]    Compiling udev v0.9.3
[INFO] [stderr]    Compiling rand v0.9.1
[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-2026-03-05-x86_64-unknown-linux-gnu/bin/rustc --crate-name syn --edition=2021 /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/syn-2.0.103/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="clone-impls"' --cfg 'feature="default"' --cfg 'feature="derive"' --cfg 'feature="extra-traits"' --cfg 'feature="full"' --cfg 'feature="parsing"' --cfg 'feature="printing"' --cfg 'feature="proc-macro"' --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=d914a15e01e42859 -C extra-filename=-99800117fee91f39 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-e8b67cf4c0e63eb3.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-11904ca722f20584.rmeta --extern unicode_ident=/opt/rustwide/target/debug/deps/libunicode_ident-4a25721f1aaca7af.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" "0465ca553866128c59bfeaa028bef9037cbd8cfed9e931ae7317385a326812fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0465ca553866128c59bfeaa028bef9037cbd8cfed9e931ae7317385a326812fd", kill_on_drop: false }`
[INFO] [stdout] 0465ca553866128c59bfeaa028bef9037cbd8cfed9e931ae7317385a326812fd
