Error when deserializing dotted table with an enum value

[spikegrobstein]

When deserializing a value represented as an enum, I receive an error if I use a dotted table, but it parses fine if I use an inline table:

ErrorInner { kind: Wanted { expected: "string or inline table", found: "dotted table" } ...

minimal example code:

use serde::Deserialize;

#[derive(Deserialize)]
struct DataFile {
    data: Compare,
}

#[derive(Deserialize)]
enum Compare {
    Gt(u32),
}

fn main() {
    let dotted_table = r#"
        data.Gt = 5
        "#;

    let inline_table = r#"
        data = { Gt = 5 }
        "#;

    // I wouldn't expect this to error
    assert!(toml::from_str::<DataFile>(dotted_table).is_err());

    // this one is ok, though.
    assert!(toml::from_str::<DataFile>(inline_table).is_ok());
}