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2024.3

Proc macro defined outside `proc-macro` crate

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Last modified: 03 December 2024

Reports the use of #[proc_macro], #[proc_macro_attribute], and #[proc_macro_derive] attributes in non-procedural macro crates. These attributes only work for procedural macro crates (i.e. crates with the proc-macro key set to true in Cargo.toml).