anchor.diff:  
   void _debugReportException(String context, dynamic exception, StackTrace stack) {
     print('------------------------------------------------------------------------');
  -  print('Exception caught while $context');
  +  'Exception caught while $context'.split('\n').forEach(print);
     print('$exception');
     print('Stack trace:');
     '$stack'.split('\n').forEach(print);
  
positive.code:     details.add('hashCode=$hashCode');
      details.add(mounted ? 'mounted' : 'not mounted');
      if (_generation != _currentGeneration) {
        int delta = _generation - _currentGeneration;
        String sign = delta < 0 ? '' : '+';
        details.add('gen$sign$delta');
      }
    }
  
  
negative.code:   void _sync(StatefulComponent old, dynamic slot) {
      if (old == null) {
        if (!_isStateInitialized) {
          assert(mounted);
          assert(!_wasMounted);
          initState();
          _isStateInitialized = true;
        }
  