Failed to expand macro: a procedural macro error occurred unsupported proc macro punctuation character '['

rust-analyzer version: 2024-12-30

rustc version: rustc 1.82.0 (f6e511eec 2024-10-15)

editor or extension: VSCode 1.96

relevant settings: All to standard

repository link (if public, optional): https://github.com/ProbablyClem/utoipauto

code snippet to reproduce:

#[utoipauto]
#[derive(Debug, OpenApi)]
#[openapi(info(title = "Generic Test Api"))]
pub(crate) struct ApiDoc;

Rust analyzer thinks that some punctuation error was made but there isn't one.
cargo build finishes without normally.
The issue is the utoipauto macro but I do not know why this is happening.

Here is the issue for the utoipauto repository:
https://github.com/ProbablyClem/utoipauto/issues/46

Start with the Rust snippet and the referenced utoipauto repository, then compare rust-analyzer's diagnostic with the result from cargo build. Check the linked utoipauto issue for additional context; done means the valid procedural macro no longer produces the unsupported '[' punctuation error, or the issue is narrowed to a documented incompatibility.