[INFO] fetching crate spooky_chess 1.1.0...
[INFO] testing spooky_chess-1.1.0 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate spooky_chess 1.1.0 into /workspace/builds/worker-1-tc2/source
[INFO] started tweaking crates.io crate spooky_chess 1.1.0
[INFO] finished tweaking crates.io crate spooky_chess 1.1.0
[INFO] tweaked toml for crates.io crate spooky_chess 1.1.0 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate spooky_chess 1.1.0 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 spooky_chess 1.1.0 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-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 4308bc839ed36f4df6d0120c1391f3dd3675260c459a6746c12300a8f2630a06
[INFO] running `Command { std: "docker" "start" "-a" "4308bc839ed36f4df6d0120c1391f3dd3675260c459a6746c12300a8f2630a06", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4308bc839ed36f4df6d0120c1391f3dd3675260c459a6746c12300a8f2630a06", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4308bc839ed36f4df6d0120c1391f3dd3675260c459a6746c12300a8f2630a06", kill_on_drop: false }`
[INFO] [stdout] 4308bc839ed36f4df6d0120c1391f3dd3675260c459a6746c12300a8f2630a06
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 32b899cd658916014c19d2a149b754ec1c9bd2051a8ebfacfe13da10af989500
[INFO] running `Command { std: "docker" "start" "-a" "32b899cd658916014c19d2a149b754ec1c9bd2051a8ebfacfe13da10af989500", kill_on_drop: false }`
[INFO] [stderr]    Compiling tree-sitter-language v0.1.7
[INFO] [stderr]    Compiling serde_core v1.0.228
[INFO] [stderr]    Compiling cc v1.2.59
[INFO] [stderr]    Compiling zmij v1.0.21
[INFO] [stderr]    Compiling hashbrown v0.17.0
[INFO] [stderr]    Compiling equivalent v1.0.2
[INFO] [stderr]    Compiling serde_json v1.0.149
[INFO] [stderr]    Compiling itoa v1.0.18
[INFO] [stderr]    Compiling regex-syntax v0.8.10
[INFO] [stderr]    Compiling hotpath-macros v0.14.1
[INFO] [stderr]    Compiling streaming-iterator v0.1.9
[INFO] [stderr]    Compiling hotpath v0.14.1
[INFO] [stderr]    Compiling indexmap v2.14.0
[INFO] [stderr]    Compiling tree-sitter-pgn v1.4.3
[INFO] [stderr]    Compiling regex-automata v0.4.14
[INFO] [stderr]    Compiling tree-sitter v0.26.8
[INFO] [stderr]    Compiling regex v1.12.3
[INFO] [stderr]    Compiling spooky_chess v1.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(generic_const_exprs)]
[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 `spooky_chess` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "32b899cd658916014c19d2a149b754ec1c9bd2051a8ebfacfe13da10af989500", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "32b899cd658916014c19d2a149b754ec1c9bd2051a8ebfacfe13da10af989500", kill_on_drop: false }`
[INFO] [stdout] 32b899cd658916014c19d2a149b754ec1c9bd2051a8ebfacfe13da10af989500
