main.zig

var a_frame: anyframe = undefined;

fn a() void {
    suspend {
        a_frame = @frame();
    }
}

fn b() u64 {
    a();
    return 1;
}

fn amain() void {
    var b_frame = async b();
    resume a_frame;
    @import("std").debug.print("{}", .{await b_frame});
}

pub fn main() void {
    nosuspend amain();
}