[INFO] fetching crate lcrs 0.1.1...
[INFO] testing lcrs-0.1.1 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate lcrs 0.1.1 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate lcrs 0.1.1
[INFO] finished tweaking crates.io crate lcrs 0.1.1
[INFO] tweaked toml for crates.io crate lcrs 0.1.1 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate lcrs 0.1.1 on toolchain beta-2025-09-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate lcrs 0.1.1 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-2025-09-21" "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-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cb5bd034db007ff0ec53a049dd3655d338d26219f08a0b643c8b7c39099b2934
[INFO] running `Command { std: "docker" "start" "-a" "cb5bd034db007ff0ec53a049dd3655d338d26219f08a0b643c8b7c39099b2934", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cb5bd034db007ff0ec53a049dd3655d338d26219f08a0b643c8b7c39099b2934", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cb5bd034db007ff0ec53a049dd3655d338d26219f08a0b643c8b7c39099b2934", kill_on_drop: false }`
[INFO] [stdout] cb5bd034db007ff0ec53a049dd3655d338d26219f08a0b643c8b7c39099b2934
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 501492d55906c6888a34e79dc52aea0aa28b2b6313091f719605c5d77511ba6d
[INFO] running `Command { std: "docker" "start" "-a" "501492d55906c6888a34e79dc52aea0aa28b2b6313091f719605c5d77511ba6d", kill_on_drop: false }`
[INFO] [stderr]    Compiling lcrs v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/ulc.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(box_patterns)]
[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 `lcrs` (bin "ulc") due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "501492d55906c6888a34e79dc52aea0aa28b2b6313091f719605c5d77511ba6d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "501492d55906c6888a34e79dc52aea0aa28b2b6313091f719605c5d77511ba6d", kill_on_drop: false }`
[INFO] [stdout] 501492d55906c6888a34e79dc52aea0aa28b2b6313091f719605c5d77511ba6d