load base into a compiler

src/main.rs

@@ -80,7 +80,8 @@ pub fn run(src: &'static str) {
 pub fn main() {
     env::set_var("RUST_BACKTRACE", "1");
     let src = "
-base :assoc (#{:a 1}, :b, 2)
+fn print! (...args) -> base :print! (args)
+print! (:foo, :bar, :baz)
 ";
     run(src);
 }