Not detecting anything when serde(flatten) is used

[nyurik]

Modify the README example with these instead, and nothing gets detected.

#[derive(Debug, PartialEq, Deserialize)]
struct Package {
    #[serde(flatten)]
    pub sub: SubPackage,
}

#[derive(Debug, PartialEq, Deserialize)]
struct SubPackage {
    name: String,
    dependencies: Map<String, Dependency>,
}

[sunshowers]

I wrote up some debugging notes at https://github.com/serde-rs/serde/issues/2312.

[strohel]

This looks like a duplicate of https://github.com/dtolnay/serde-ignored/issues/10