serde 1.0.162 on Rust Cargo

Support deserializing flattened adjacently tagged enums from data formats which represent fields as bytes, such as the csv crate (#2377, thanks @mfro)

#[derive(Deserialize)]
pub struct Record {
    common: u64,
    #[serde(flatten)]
    kind: Kind,
}

#[derive(Deserialize)]
#[serde(tag = "kind", content = "parameter", rename_all = "lowercase")]
enum Kind {
    Foo(u64),
    Bar(bool),
}

common,kind,parameter
1,foo,42
2,bar,true