// To me wrapping the overflowing component in a Flexible did the trick
Row(
      mainAxisSize: MainAxisSize.min,
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        Icon(Icons.arrow_back),
        Container(
          width: 5,
        ),
        Flexible( // to fix overflowing texts
          child: RichText(
            maxLines: 2,
            overflow: TextOverflow.ellipsis,
            text: TextSpan(
                text: 'A long text',
                style: TextStyle(fontWeight: FontWeight.bold),
                children: [
                  TextSpan(
                      text: '\n' + 'A very long text you would not believe it is so long',
                      style: TextStyle(fontWeight: FontWeight.bold))
                ]),
          ),
        ),
      ],
    )