hmmmmm, I think that's the C++ runtime making that complaint, but possibly nothing to do with bitcoind. Try erasing the /.armory/databases folder and rebuild the databases folder from the start. If that's unsuccessful, try bitcoind -reindex, but I'm not confident that's the source of your issue.

That part of the code (tx scan) is a multi-threaded high performance wonder, but it took some lengthy debugging in it's original incarnation. It's possible you've done everyone a favour by finding an unknown bug. Keep the log files if you can, goatpig may want to see them.