The ANM manager
TH16 can crash when a large number of enemies and bullets/lasers are destroyed, ruining some score runs. Notably, TH17 1.00a can also crash, but the bug was finally fixed in 1.00b.
Motivated by wanting to understand this crash and perhaps repair it for TH16, I made my best effort to look into the changes between TH17 1.00a and 1.00b.
I have not yet figured out the true cause of the crash, but my efforts to discover the cause have forced me to understand even more about how ANMs work.
(Edit 2020/10/07: The reason for the crash is now known!)
Thanks to this, I have now mapped out a significant portion of
AnmManager, the single largest struct ever allocated by the game.