For reason that are specific to my usage, I tap in to the compiler code that is in the class-wp-scss.php file to compile other specific .scss files. Unfortunately the recent change to add a compiler error has created what seems to be a needless error message. The compiler still runs, it just throws up an error that the compiler has already been created within the class.

The function below already checks to make sure that it's not being created more than once, that surely only requires a silent moving on through the processing of the code? I would suggest we remove the "else" statement from this and let the compile function end silently if the compiler function has already been instantiated before.

if (!function_exists( 'compiler' )) {
  function compiler($in, $out, $instance) {
    global $scssc, $cache;
    if (!file_exists($cache)) {
      mkdir($cache, 0644);
    }
   [...]
}else{
  $errors = array (
    'file' => 'SCSS compiler',
    'message' => "Compiling Error, function 'compiler' already exists."
  );
  array_push($this->compile_errors, $errors);
}