/**
  *  restore file and line offset
  */
 public function popTrace()
 {
     if ($this->smurty->debugging) {
         Smurty_Internal_Debug::end_compile($this->template);
     }
     $r = array_pop($this->trace_stack);
     $this->smurty->_current_file = $r[0];
     $this->trace_filepath = $r[1];
     $this->trace_uid = $r[2];
     $this->trace_line_offset = $r[3];
     if ($this->smurty->debugging) {
         Smurty_Internal_Debug::start_compile($this->template);
     }
 }