Crash on EntityList::AIYellForHelp?

[Secrets]

I'm seeing a lot of this in core dumps. Whenever this function is called, it occasionally puts this out with this:

0x081d080a in EntityList::AIYellForHelp (this=0x8373ec0, sender=0x8bf3738, attacker=0x8c265b0) at aggro.cpp:437

And when I go to line 437, it's a bunch of conditionals:

if (
			mob != sender
			&& mob != attacker
//			&& !mob->IsCorpse()
//			&& mob->IsAIControlled()
			&& mob->GetPrimaryFaction() != 0
			&& mob->DistNoRoot(*sender) <= r
			&& !mob->IsEngaged()
			)

which I assume is being met, due to this being filled in as well as attacker & sender, but since it is generating a core dump I can only assume not.

Anyone have an idea on how to fix this?