Essentially it will try to withdraw the VESTED SHARES but with a catch ---> it will be a negative number. theoretically this negative withdrawl has evaporated all the STEEM in circulation which is 270 million or so tokens but due to checks like VESTES being with other users etc will not happen. So I think first it might have reduced the entire VESTED Balance of @nijeah if there was any and then it will try to find further VESTED shares. I think this will create a "race condition" and the block production will stop as this particular operation will never be completed. Since the operation was a valid operation, the blockchain and thus all the witnesses will try to wait until the operation is completed.
I think this is what might have happened. Trying to re-produce this now on a node with 1 witness and stable production. Will update once its verified.
A simple way to explain it. Withdrawing without money.
Essentially it will try to withdraw the VESTED SHARES but with a catch ---> it will be a negative number. theoretically this negative withdrawl has evaporated all the STEEM in circulation which is 270 million or so tokens but due to checks like VESTES being with other users etc will not happen. So I think first it might have reduced the entire VESTED Balance of @nijeah if there was any and then it will try to find further VESTED shares. I think this will create a "race condition" and the block production will stop as this particular operation will never be completed. Since the operation was a valid operation, the blockchain and thus all the witnesses will try to wait until the operation is completed.
I think this is what might have happened. Trying to re-produce this now on a node with 1 witness and stable production. Will update once its verified.