sys.FileSystem.exists() fails in macro

[AdrianV]

sys.FileSystem.exists() fails with Invalid_argument("index out of bounds") when argument does not contain a path

class Main 
{
        macro static function test() {
                var isThere = sys.FileSystem.exists("x");
                return macro $v{ isThere };
        }
        
        static function main() 
        {
                var it = test();
                trace(it);
        }
        
}