After hours of testing and a suggestion by RW support, I have confirmed that Formloom 3.0.9 causes RW to crash on a publish all files command.
Yabdab has apparently not updated the file available here:
It is still 3.0.8. If you are a Formloom user and have been crashing when publishing since their latest update, I recommend reverting. You can still grab an old copy at the link above.
I reverted and am finally able to publish projects again after days dead in the water publishing a page at a time.