I've gotten the same thing in the ledger screen for city growth. Not that I haven't been tempted to wait that long to see what happens, but I'm a bit too impatient that way.
It would not progress, its just cause the game cant multiply or divide by 0 
This shows up with 0 research points made per turn, have first shown now cause due to 0.912 you make a passive of 0 research points, not 2 without anything.
Sincerely
~ Kongdej
