/**
  * Called when emitting fails
  *
  * @param   xp.compiler.io.Source src
  * @param   lang.FormatException reason
  */
 public function emittingFailed(Source $src, \lang\FormatException $reason)
 {
     $this->writer->writeLine($src, ': ', $reason->compoundMessage());
     $reason->printStackTrace();
 }