As title; at a certain point, attempting to pick up chests causes a crash.

Crash message:
Error while running event on_player_mined_item (ID 8)
LuaEntity API call when LuaEntity was invalid.
stack traceback:
ammo-loader/control.lua:489: in function 'clean_chest_cycler'
ammo-loader/control.lua:177: in function <ammo-loader/control.lua:171>

Unfortunately, I'm unsure as to the exact steps for reproducing this. However, it only seems to affect chests that have (or had at some point) ammo in them; an empty chest right next to one that had ammo in it picks up just fine, while the one that has/had ammo causes a crash (regardless of whether it currently has any or not).

I just released an update that should take care of this problem. Let me know if it still occurs after updating, I'll be happy to take a closer look.

Looks like it did the trick; looks like it was caused by leaving ammo in a loader chest for some amount of time.

After this last update, picking up a loader chest with ammo in it I'd left sitting as a test didn't cause a crash, so this issue is solved.