optimize(env): single arg

src/jit/test.rs

@@ -32,7 +32,7 @@ fn test_expr(expr: &str, expected: Value) {
     );
     let env = env(&vm);
     let value = vm
-        .eval(prog.top_level.into_iter(), env)
+        .eval(prog.top_level.into_iter(), env.into())
         .unwrap()
         .to_public(&vm, &mut HashSet::new());
     assert_eq!(value, expected);