[INFO] fetching crate rs_1brc 0.2.31...
[INFO] testing rs_1brc-0.2.31 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate rs_1brc 0.2.31 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate rs_1brc 0.2.31
[INFO] finished tweaking crates.io crate rs_1brc 0.2.31
[INFO] tweaked toml for crates.io crate rs_1brc 0.2.31 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate rs_1brc 0.2.31 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 rs_1brc 0.2.31 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] 5561dc15ebde3547c9225f82a66915a79be855cb2b27c6de2cb46eb93922d7a7
[INFO] running `Command { std: "docker" "start" "-a" "5561dc15ebde3547c9225f82a66915a79be855cb2b27c6de2cb46eb93922d7a7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5561dc15ebde3547c9225f82a66915a79be855cb2b27c6de2cb46eb93922d7a7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5561dc15ebde3547c9225f82a66915a79be855cb2b27c6de2cb46eb93922d7a7", kill_on_drop: false }`
[INFO] [stdout] 5561dc15ebde3547c9225f82a66915a79be855cb2b27c6de2cb46eb93922d7a7
[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] 3da0064b7d2acdf609fe14d655b4fdcd00312ab8c0e4ab95ef78deb273c6e995
[INFO] running `Command { std: "docker" "start" "-a" "3da0064b7d2acdf609fe14d655b4fdcd00312ab8c0e4ab95ef78deb273c6e995", kill_on_drop: false }`
[INFO] [stderr]    Compiling portable-atomic v1.13.1
[INFO] [stderr]    Compiling unit-prefix v0.5.2
[INFO] [stderr]    Compiling syn v2.0.114
[INFO] [stderr]    Compiling console v0.16.2
[INFO] [stderr]    Compiling clap_builder v4.5.56
[INFO] [stderr]    Compiling fork v0.6.0
[INFO] [stderr]    Compiling rayon v1.11.0
[INFO] [stderr]    Compiling indicatif v0.18.3
[INFO] [stderr]    Compiling clap_derive v4.5.55
[INFO] [stderr]    Compiling concat-idents v1.1.5
[INFO] [stderr]    Compiling clap v4.5.56
[INFO] [stderr]    Compiling rs_1brc v0.2.31 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(portable_simd)]
[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 `rs_1brc` (bin "rs_1brc") due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "3da0064b7d2acdf609fe14d655b4fdcd00312ab8c0e4ab95ef78deb273c6e995", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3da0064b7d2acdf609fe14d655b4fdcd00312ab8c0e4ab95ef78deb273c6e995", kill_on_drop: false }`
[INFO] [stdout] 3da0064b7d2acdf609fe14d655b4fdcd00312ab8c0e4ab95ef78deb273c6e995
