#![feature(custom_attribute, custom_derive, plugin)]
#![plugin(serde_macros)]

#[derive(Serialize)] //~ ERROR: 6 errors:
struct S {
    #[serde(rename(serialize="x"))]
    #[serde(rename(serialize="y"))] // ERROR: duplicate serde attribute `rename`
    a: (),

    #[serde(rename(serialize="x"))]
    #[serde(rename="y")] // ERROR: duplicate serde attribute `rename`
    b: (),

    #[serde(rename(serialize="x"))]
    #[serde(rename(deserialize="y"))] // ok
    c: (),

    #[serde(rename="x")]
    #[serde(rename(deserialize="y"))] // ERROR: duplicate serde attribute `rename`
    d: (),

    #[serde(rename(serialize="x", serialize="y"))] // ERROR: duplicate serde attribute `rename`
    e: (),

    #[serde(rename="x", serialize="y")] // ERROR: unknown serde field attribute `serialize`
    f: (),

    #[serde(rename(serialize="x"), rename(serialize="y"))] // ERROR: duplicate serde attribute `rename`
    g: (),
}

fn main() {}