[INFO] fetching crate polished-css 0.1.0...
[INFO] testing polished-css-0.1.0 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate polished-css 0.1.0 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate polished-css 0.1.0
[INFO] finished tweaking crates.io crate polished-css 0.1.0
[INFO] tweaked toml for crates.io crate polished-css 0.1.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate polished-css 0.1.0 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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 143 packages to latest compatible versions
[INFO] [stderr]       Adding strum v0.25.0 (available: v0.27.2)
[INFO] [stderr]       Adding strum_macros v0.25.3 (available: v0.27.2)
[INFO] [stderr]       Adding typed-builder v0.16.2 (available: v0.22.0)
[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] 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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 414729a57e6402eae162e081ffbe13e65d4967c7dc69113937a93de8866d93d0
[INFO] running `Command { std: "docker" "start" "-a" "414729a57e6402eae162e081ffbe13e65d4967c7dc69113937a93de8866d93d0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "414729a57e6402eae162e081ffbe13e65d4967c7dc69113937a93de8866d93d0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "414729a57e6402eae162e081ffbe13e65d4967c7dc69113937a93de8866d93d0", kill_on_drop: false }`
[INFO] [stdout] 414729a57e6402eae162e081ffbe13e65d4967c7dc69113937a93de8866d93d0
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e26f61ca1d48ce995137bdaa8b56926877420da81de400d540350fd72d9ab091
[INFO] running `Command { std: "docker" "start" "-a" "e26f61ca1d48ce995137bdaa8b56926877420da81de400d540350fd72d9ab091", kill_on_drop: false }`
[INFO] [stderr]    Compiling rustversion v1.0.22
[INFO] [stderr]    Compiling heck v0.4.1
[INFO] [stderr]    Compiling unicode-segmentation v1.12.0
[INFO] [stderr]    Compiling strum v0.25.0
[INFO] [stderr]    Compiling typed-builder-macro v0.16.2
[INFO] [stderr]    Compiling convert_case v0.6.0
[INFO] [stderr]    Compiling typed-builder v0.16.2
[INFO] [stderr]    Compiling strum_macros v0.25.3
[INFO] [stderr]    Compiling polished-css-macros v0.1.0
[INFO] [stderr]    Compiling polished-css v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(const_trait_impl)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `#[must_use]` attribute cannot be used on trait methods in impl blocks
[INFO] [stdout]   --> src/selector/class.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     #[must_use]
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]    = help: `#[must_use]` can be applied to data types, functions, unions, required trait methods, provided trait methods, inherent methods, foreign functions, and traits
[INFO] [stdout]    = note: `#[warn(unused_attributes)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `#[must_use]` attribute cannot be used on trait methods in impl blocks
[INFO] [stdout]   --> src/selector/class.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 22 |     #[must_use]
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]    = help: `#[must_use]` can be applied to data types, functions, unions, required trait methods, provided trait methods, inherent methods, foreign functions, and traits
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `polished-css` (lib) due to 1 previous error; 2 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "e26f61ca1d48ce995137bdaa8b56926877420da81de400d540350fd72d9ab091", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e26f61ca1d48ce995137bdaa8b56926877420da81de400d540350fd72d9ab091", kill_on_drop: false }`
[INFO] [stdout] e26f61ca1d48ce995137bdaa8b56926877420da81de400d540350fd72d9ab091
