I've reproduced the "flood" fork using batch wallet_transfer [lots of data lots of times].
Got a lot of different errors in logs, don't know if it will be of any use I can provide it if needed.
The result is that the client became irresponsive even after restart.
If I use the initial datadir the client stops responding after 5-10 seconds but is still producing logs.
I had to create new datadir and copy the wallet so I can continue testing.