Minifigure Torso Cracks
Given that this is from a new set that is currently in production, you should contact LEGO customer service and they'll probably send you a replacement torso at no charge. LEGO has a pretty simple site to handle this:

https://service.lego.com/en-us/replacementparts#BasicInfo

You just have to enter your age and the issue that you are having, then you enter the set number (75043 in this case) and find the piece that is broken from the parts list. I just checked, and that torso is currently listed, so you should be in good shape. I've had this same torso issue, and they were happy to send a replacement.