[INFO] fetching crate polished-css 0.1.0...
[INFO] testing polished-css-0.1.0 against beta-2025-10-28 for beta-1.92-2
[INFO] extracting crate polished-css 0.1.0 into /workspace/builds/worker-7-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-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate polished-css 0.1.0 on toolchain beta-2025-10-28
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-10-28" "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-2025-10-28" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 120 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: v0.23.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-10-28" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 06fff4413955c33b877fa38a454228f8c1fbb1a4f6e091dd60ed48da8aa6bceb
[INFO] running `Command { std: "docker" "start" "-a" "06fff4413955c33b877fa38a454228f8c1fbb1a4f6e091dd60ed48da8aa6bceb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "06fff4413955c33b877fa38a454228f8c1fbb1a4f6e091dd60ed48da8aa6bceb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "06fff4413955c33b877fa38a454228f8c1fbb1a4f6e091dd60ed48da8aa6bceb", kill_on_drop: false }`
[INFO] [stdout] 06fff4413955c33b877fa38a454228f8c1fbb1a4f6e091dd60ed48da8aa6bceb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d2827380302d28f559b1e022855c95f2155ab243caf894f0eb5d9f585bb83551
[INFO] running `Command { std: "docker" "start" "-a" "d2827380302d28f559b1e022855c95f2155ab243caf894f0eb5d9f585bb83551", kill_on_drop: false }`
[INFO] [stderr]    Compiling ident_case v1.0.1
[INFO] [stderr]    Compiling strsim v0.11.1
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]    Compiling rustversion v1.0.22
[INFO] [stderr]    Compiling paste v1.0.15
[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 syn v2.0.108
[INFO] [stderr]    Compiling convert_case v0.6.0
[INFO] [stderr]    Compiling darling_core v0.20.11
[INFO] [stderr]    Compiling typed-builder-macro v0.16.2
[INFO] [stderr]    Compiling strum_macros v0.25.3
[INFO] [stderr]    Compiling typed-builder v0.16.2
[INFO] [stderr]    Compiling darling_macro v0.20.11
[INFO] [stderr]    Compiling darling v0.20.11
[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, foreign functions, functions, inherent methods, provided trait methods, required trait methods, traits, and unions
[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, foreign functions, functions, inherent methods, provided trait methods, required trait methods, traits, and unions
[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" "d2827380302d28f559b1e022855c95f2155ab243caf894f0eb5d9f585bb83551", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d2827380302d28f559b1e022855c95f2155ab243caf894f0eb5d9f585bb83551", kill_on_drop: false }`
[INFO] [stdout] d2827380302d28f559b1e022855c95f2155ab243caf894f0eb5d9f585bb83551