Incorrect line/column info when using tag setting with nested enums

[mkovaxx]

Project for easy repro here.

Code:

const JSON_TEXT: &str = r#"
{
    "things_tag": "animals",
    "items": [
        {"animal_tag": "cat"},
        {"animal_tag": "xenomorph"},
        {"animal_tag": "dog"}
    ]
}
"#;

fn main() {
    let stuff = serde_json::from_str::<Things>(JSON_TEXT);
    println!("{:?}", stuff);
}

#[derive(Debug, serde::Serialize, serde::Deserialize)]
#[serde(tag = "things_tag", rename_all = "snake_case")]
enum Things {
    Animals(Animals),
    Plants(Plants),
}

#[derive(Debug, serde::Serialize, serde::Deserialize)]
struct Animals {
    items: Vec<Animal>,
}

#[derive(Debug, serde::Serialize, serde::Deserialize)]
#[serde(tag = "animal_tag", rename_all = "snake_case")]
enum Animal {
    Cat,
    Dog,
}

#[derive(Debug, serde::Serialize, serde::Deserialize)]
struct Plants {}

Expected output:

Err(Error("unknown variant `xenomorph`, expected `cat` or `dog`", line: 6, column: 34))

Observed output:

Err(Error("unknown variant `xenomorph`, expected `cat` or `dog`", line: 0, column: 0))

Note how the line: 0, column: 0 information is incorrect.

The problem disappears when the tag = "things_tag" setting is removed (branch), but persists when only the tag = "animal_tag" is removed (branch).

[mkovaxx]

Seems related to serde-rs/serde#1621