macros fail to compile with latest Rust nightly build

[fuchsnj]

#![feature(plugin)]
#![plugin(json_macros)]

fn main() {
    let json = json!({
        "test" : 4      
    });
}

src\main.rs:5:13: 7:4 error: expected identifier, found `_ob`
src\main.rs:5   let json = json!({
src\main.rs:6       "test" : 4      
src\main.rs:7   });
Could not compile `json_test`.

To learn more, run the command again with --verbose.

rustc --version
rustc 1.1.0-nightly (c4b23aec4 2015-04-29) (built 2015-04-29)

[tomjakubowski]

Seems related to this: rust-lang/rust#23085

Fix incoming.

[tomjakubowski]

Released in v0.2.4