Deserializing enums fails with latest serde

[jwodder]

The following code:

use serde::{Deserialize, Serialize};

#[derive(Clone, Debug, Deserialize, Eq, PartialEq, Serialize)]
#[serde(tag = "type")]
enum Message {
    Request {
        id: u32,
        resource: String,
        operation: String,
    },
    Response {
        id: u32,
        value: String,
    },
}

fn main() {
    let value = Message::Response {
        id: 60069,
        value: "Foobar".into(),
    };
    let serialized = ron::to_string(&value).unwrap();
    println!("Serialized:");
    println!("{serialized}");
    println!();
    let deserialized: Message = ron::from_str(&serialized).unwrap();
    println!("Deserialized:");
    println!("{deserialized:#?}");
}

with the following dependencies:

[dependencies]
ron = "0.11.0"
serde = { version = "1.0.221", features = ["derive"] }

fails with:

Serialized:
(type:"Response",id:60069,value:"Foobar")


thread 'main' panicked at src/main.rs:35:60:
called `Result::unwrap()` on an `Err` value: SpannedError { code: ExpectedString, span: Span { start: Position { line: 1, col: 21 }, end: Position { line: 1, col: 21 } } }
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

It also fails when ron 0.10.1 is used, though there the output is:

Serialized:
(type:"Response",id:60069,value:"Foobar")


thread 'main' panicked at src/main.rs:35:60:
called `Result::unwrap()` on an `Err` value: SpannedError { code: ExpectedString, position: Position { line: 1, col: 21 } }
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

It also fails with serde 1.0.220 but not with 1.0.219.

Other serde formats are not failing with the latest serde, so this appears to be a bug in ron.

[juntyr]

This will be fixed by #582

I need a customisable buffer type serde-rs/serde#2912, I'm holding out for a customisable buffer type till the end of the night. He's gotta be strong and he's gotta be fast, and he's gotta be fresh from the fight.