Fail to work with typetag during serializing

[n0b0dyCN]

toml crate fail to work with typetag with vector of trait object during serializing, but serde_json works:

    use serde::{Serialize, Deserialize};

    #[typetag::serde(tag = "type")]
    trait WebEvent {
        fn inspect(&self);
    }
    
    #[derive(Serialize, Deserialize)]
    struct PageLoad(usize);
    
    #[derive(Serialize, Deserialize, Clone)]
    struct Click {
        x: i32,
        y: i32,
    }

    #[typetag::serde]
    impl WebEvent for PageLoad {
        fn inspect(&self) {
            println!("200 milliseconds or bust");
        }
    }

    #[typetag::serde]
    impl WebEvent for Click {
        fn inspect(&self) {
            println!("negative space between the ads: x={} y={}", self.x, self.y);
        }
    }

    let v = Click{ x: 1, y: 1 };
    let dynv = Box::new(v.clone()) as Box::<dyn WebEvent>;
    println!("{}", toml::to_string(&v).unwrap());
    println!("{}", toml::to_string(&dynv).unwrap());
    println!("{}", serde_json::to_string(&vec![dynv]).unwrap()); // This works
    println!("{}", toml::to_string(&vec![dynv]).unwrap()); // This does not work

JSON output:

[{"type":"Click","x":1,"y":1}]

toml Error message:

thread '' panicked at 'called `Result::unwrap()` on an `Err` value: Error { inner: UnsupportedType(None) }'

versioning:

toml = "0.8.2" typetag = "0.2" serde = { version = "1.0", features = ["derive"] } serde_json = "1.0"