expand: Do not ICE when a legacy AST-based macro attribute produces and empty expression #83814
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…nd empty expression
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Rollup of 8 pull requests Successful merges: - rust-lang#83370 (Add `x.py setup tools` which enables `download-rustc` by default) - rust-lang#83489 (Properly suggest deref in else block) - rust-lang#83734 (Catch a bad placeholder type error for statics in `extern`s) - rust-lang#83814 (expand: Do not ICE when a legacy AST-based macro attribute produces and empty expression) - rust-lang#83835 (rustdoc: sort search index items for compression) - rust-lang#83849 (rustdoc: Cleanup handling of associated items for intra-doc links) - rust-lang#83881 (:arrow_up: rust-analyzer) - rust-lang#83885 (Document compiler/ with -Aprivate-intra-doc-links) Failed merges: r? `@ghost` `@rustbot` modify labels: rollup
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Fixes #80251
The reported error is the same as for
let _ = #[cfg(FALSE)] EXPR;