[INFO] fetching crate starryos 0.5.8...
[INFO] testing starryos-0.5.8 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate starryos 0.5.8 into /workspace/builds/worker-4-tc2/source
[INFO] removed /workspace/builds/worker-4-tc2/source/.cargo/config.toml
[INFO] started tweaking crates.io crate starryos 0.5.8
[INFO] finished tweaking crates.io crate starryos 0.5.8
[INFO] tweaked toml for crates.io crate starryos 0.5.8 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate starryos 0.5.8 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 starryos 0.5.8 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]     Blocking waiting for file lock on package cache
[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-2026-04-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 862698a1ae5a5444688615e223b563139d96a0f4d66dcaf6da52356f5903799a
[INFO] running `Command { std: "docker" "start" "-a" "862698a1ae5a5444688615e223b563139d96a0f4d66dcaf6da52356f5903799a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "862698a1ae5a5444688615e223b563139d96a0f4d66dcaf6da52356f5903799a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "862698a1ae5a5444688615e223b563139d96a0f4d66dcaf6da52356f5903799a", kill_on_drop: false }`
[INFO] [stdout] 862698a1ae5a5444688615e223b563139d96a0f4d66dcaf6da52356f5903799a
[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-2026-04-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e105fc33bbf7bfb816fd4523efb0033a74b57fb7a7ea9a671a0aa67f92e34ae7
[INFO] running `Command { std: "docker" "start" "-a" "e105fc33bbf7bfb816fd4523efb0033a74b57fb7a7ea9a671a0aa67f92e34ae7", 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 cfg-if v1.0.4
[INFO] [stderr]    Compiling libc v0.2.185
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[INFO] [stderr]    Compiling scopeguard v1.2.0
[INFO] [stderr]    Compiling bitflags v2.11.1
[INFO] [stderr]    Compiling heck v0.5.0
[INFO] [stderr]    Compiling equivalent v1.0.2
[INFO] [stderr]    Compiling shlex v1.3.0
[INFO] [stderr]    Compiling memchr v2.8.0
[INFO] [stderr]    Compiling rustversion v1.0.22
[INFO] [stderr]    Compiling pin-project-lite v0.2.17
[INFO] [stderr]    Compiling itoa v1.0.18
[INFO] [stderr]    Compiling lock_api v0.4.14
[INFO] [stderr]    Compiling futures-core v0.3.32
[INFO] [stderr]    Compiling smallvec v1.15.1
[INFO] [stderr]    Compiling hashbrown v0.17.0
[INFO] [stderr]    Compiling find-msvc-tools v0.1.9
[INFO] [stderr]    Compiling thiserror v2.0.18
[INFO] [stderr]    Compiling strsim v0.11.1
[INFO] [stderr]    Compiling serde_core v1.0.228
[INFO] [stderr]    Compiling autocfg v1.5.0
[INFO] [stderr]    Compiling bit_field v0.10.3
[INFO] [stderr]    Compiling ident_case v1.0.1
[INFO] [stderr]    Compiling ax-errno v0.4.7
[INFO] [stderr]    Compiling futures-sink v0.3.32
[INFO] [stderr]    Compiling bitflags v1.3.2
[INFO] [stderr]    Compiling utf8parse v0.2.2
[INFO] [stderr]    Compiling once_cell v1.21.4
[INFO] [stderr]    Compiling zerocopy v0.8.48
[INFO] [stderr]    Compiling is_terminal_polyfill v1.70.2
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[INFO] [stderr]    Compiling pkg-config v0.3.33
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[INFO] [stderr]    Compiling toml_datetime v0.6.11
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[INFO] [stderr]    Compiling crc v3.4.0
[INFO] [stderr]    Compiling hash32 v0.3.1
[INFO] [stderr]    Compiling allocator-api2 v0.2.21
[INFO] [stderr]    Compiling ax-config v0.5.9
[INFO] [stderr]    Compiling x86_64 v0.15.4
[INFO] [stderr]    Compiling stable_deref_trait v1.2.1
[INFO] [stderr]    Compiling crossbeam-utils v0.8.21
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[INFO] [stderr]    Compiling bitmap-allocator v0.4.4
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[INFO] [stderr]    Compiling ryu v1.0.23
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[INFO] [stderr]    Compiling typeid v1.0.3
[INFO] [stderr]    Compiling httparse v1.10.1
[INFO] [stderr]    Compiling zmij v1.0.21
[INFO] [stderr]    Compiling const-str v1.1.0
[INFO] [stderr]    Compiling ax-handler-table v0.3.6
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[INFO] [stderr]    Compiling ring v0.17.14
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[INFO] [stderr]    Compiling ax-driver-net v0.3.6
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[INFO] [stderr]    Compiling axpoll v0.3.8
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[INFO] [stderr]    Compiling darling_core v0.23.0
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[INFO] [stderr]    Compiling ax-io v0.5.4
[INFO] [stderr]    Compiling ax-timer-list v0.3.4
[INFO] [stderr]    Compiling crc32fast v1.5.0
[INFO] [stderr]    Compiling httpdate v1.0.3
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[INFO] [stderr]    Compiling regex v1.12.3
[INFO] [stderr]    Compiling rustc-hash v2.1.2
[INFO] [stderr]    Compiling instability v0.3.12
[INFO] [stderr]    Compiling base64 v0.22.1
[INFO] [stderr]    Compiling cexpr v0.6.0
[INFO] [stderr]    Compiling rustls v0.23.38
[INFO] [stderr]    Compiling atomic-waker v1.1.2
[INFO] [stderr]    Compiling try-lock v0.2.5
[INFO] [stderr]    Compiling want v0.3.1
[INFO] [stderr]    Compiling unicode-truncate v2.0.1
[INFO] [stderr]    Compiling darling_core v0.21.3
[INFO] [stderr]    Compiling compact_str v0.9.0
[INFO] [stderr]    Compiling concurrent-queue v2.5.0
[INFO] [stderr]    Compiling svgbobdoc v0.3.0
[INFO] [stderr]    Compiling hybrid-array v0.4.10
[INFO] [stderr]    Compiling libudev-sys v0.1.4
[INFO] [stderr]    Compiling memoffset v0.9.1
[INFO] [stderr]    Compiling sync_wrapper v1.0.2
[INFO] [stderr]    Compiling mime v0.3.17
[INFO] [stderr]    Compiling unicase v2.9.0
[INFO] [stderr]    Compiling adler2 v2.0.1
[INFO] [stderr]    Compiling simd-adler32 v0.3.9
[INFO] [stderr]    Compiling heapless v0.8.0
[INFO] [stderr]    Compiling rlsf v0.2.2
[INFO] [stderr]    Compiling tower-layer v0.3.3
[INFO] [stderr]    Compiling winnow v1.0.1
[INFO] [stderr]    Compiling semver v1.0.28
[INFO] [stderr]    Compiling subtle v2.6.1
[INFO] [stderr]    Compiling ref-cast v1.0.25
[INFO] [stderr]    Compiling miniz_oxide v0.8.9
[INFO] [stderr]    Compiling strum_macros v0.27.2
[INFO] [stderr]    Compiling thiserror-impl v2.0.18
[INFO] [stderr]    Compiling zerocopy-derive v0.8.48
[INFO] [stderr]    Compiling futures-macro v0.3.32
[INFO] [stderr]    Compiling clap_derive v4.6.0
[INFO] [stderr]    Compiling ax-crate-interface v0.5.1
[INFO] [stderr]    Compiling ax-percpu-macros v0.4.4
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]    Compiling ax-kernel-guard v0.3.7
[INFO] [stderr]    Compiling bytemuck_derive v1.10.2
[INFO] [stderr]    Compiling ax-kspin v0.3.6
[INFO] [stderr]    Compiling tokio-macros v2.7.0
[INFO] [stderr]    Compiling ax-cpu v0.5.5
[INFO] [stderr]    Compiling ax-plat-macros v0.3.1
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/ax-cpu-0.5.5/src/lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(extern_item_impls)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ax-cpu` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "e105fc33bbf7bfb816fd4523efb0033a74b57fb7a7ea9a671a0aa67f92e34ae7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e105fc33bbf7bfb816fd4523efb0033a74b57fb7a7ea9a671a0aa67f92e34ae7", kill_on_drop: false }`
[INFO] [stdout] e105fc33bbf7bfb816fd4523efb0033a74b57fb7a7ea9a671a0aa67f92e34ae7
