I am filing this ticket for informational purposes, as to the best of my knowledge this crash can only be triggered through the use of mods or console commands. The specific issue is that the body part data for Nuka World's ant swarm enemies refers to a bone in their skeleton (Swrm_BN_C_Torso) that does not exist in the actual creature model. This results in a crash to desktop in rare cases, the easiest to reproduce being one where the swarm is killed while disabled.
Steps to reproduce:
- Select an ant swarm in console
- Use the console command "Disable"
- Use the console command "Kill"
At this point the game will crash and you will return to your desktop. This can be resolved by deleting the "Torso" data from the swarm's body part data. The torso data cannot be targeted by VATS and appears to serve no functional purpose, since the intended death explosion FX cannot be placed on the ant's model due to it lacking the relevant node. If the choice is made to fix this, the death explosion can be preserved by adding it to the "Head2" flying ant instead. That is the last one to be killed and as a result would be the source of the death explosion in normal circumstances. That said, I don't believe preserving the bloatfly explosion FX attached to the torso is worthwhile, as that effect drops large pieces of bloatfly debris that is a clear mismatch to the ants themselves.