Can't use anonymous struct literal as default value for struct

[heidezomp]

I'm trying to use an anonymous struct literal (which is a super cool feature btw 😄) to provide a default value for a struct field:

const Foo = struct {
    bar: Bar = .{ .a = 3 },
};

const Bar = struct {
    a: u32,
};

pub fn main() void {
    const foo: Foo = .{};
}

which results in the following error:

/home/heidezomp/Code/grot/foo.zig:2:17: error: expected type 'Bar', found 'struct:2:17'
    bar: Bar = .{ .a = 3 },
                ^
/home/heidezomp/Code/grot/foo.zig:5:13: note: Bar declared here
const Bar = struct {
            ^
/home/heidezomp/Code/grot/foo.zig:2:17: note: struct:2:17 declared here
    bar: Bar = .{ .a = 3 },
                ^
/home/heidezomp/Code/grot/foo.zig:10:23: note: referenced here
    const foo: Foo = .{};

[andrewrk]

Now gives:

test.zig:2:17: error: TODO: type coercion of anon struct literal to struct
    bar: Bar = .{ .a = 3 },
                ^
test.zig:10:23: note: referenced here
    const foo: Foo = .{};
                      ^