[INFO] fetching crate starry-vm 0.5.6...
[INFO] testing starry-vm-0.5.6 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate starry-vm 0.5.6 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate starry-vm 0.5.6
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate starry-vm 0.5.6
[INFO] tweaked toml for crates.io crate starry-vm 0.5.6 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate starry-vm 0.5.6 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 starry-vm 0.5.6 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] ec120ef9100174e213ecc8443c6493a3e4c3feff1386c02b4cb18e05ebce835d
[INFO] running `Command { std: "docker" "start" "-a" "ec120ef9100174e213ecc8443c6493a3e4c3feff1386c02b4cb18e05ebce835d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ec120ef9100174e213ecc8443c6493a3e4c3feff1386c02b4cb18e05ebce835d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ec120ef9100174e213ecc8443c6493a3e4c3feff1386c02b4cb18e05ebce835d", kill_on_drop: false }`
[INFO] [stdout] ec120ef9100174e213ecc8443c6493a3e4c3feff1386c02b4cb18e05ebce835d
[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] a1fd2aa58100f842fee2e26bd8d00eddde4e7cbbf9c4b97427c18e3f8425c640
[INFO] running `Command { std: "docker" "start" "-a" "a1fd2aa58100f842fee2e26bd8d00eddde4e7cbbf9c4b97427c18e3f8425c640", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v2.0.117
[INFO] [stderr]    Compiling typeid v1.0.3
[INFO] [stderr]    Compiling ax-errno v0.4.7
[INFO] [stderr]    Compiling bytemuck v1.25.0
[INFO] [stderr]    Compiling strum_macros v0.27.2
[INFO] [stderr]    Compiling extern-trait-impl v0.4.3
[INFO] [stderr]    Compiling extern-trait v0.4.3
[INFO] [stderr]    Compiling strum v0.27.2
[INFO] [stderr]    Compiling starry-vm v0.5.6 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(maybe_uninit_as_bytes)]
[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 `starry-vm` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "a1fd2aa58100f842fee2e26bd8d00eddde4e7cbbf9c4b97427c18e3f8425c640", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a1fd2aa58100f842fee2e26bd8d00eddde4e7cbbf9c4b97427c18e3f8425c640", kill_on_drop: false }`
[INFO] [stdout] a1fd2aa58100f842fee2e26bd8d00eddde4e7cbbf9c4b97427c18e3f8425c640
