Crash when hibernating in 3.8.3

Hi Nigel,

I have just upgraded to 3.8.3 from 3.7.2. The latter was rock solid, but
now I'm getting a crash on every hibernate.

The usual photos with the stack trace are attached. It's definitely
something to do with xfs - there have been a lot of changes lately in the
filesystem.

Apologies for the photo quality and let me know if you need more
information to reproduce this.

Regards,
Pedro