Chum deals 3 damage if the next encountered ICE doesn't have all its subroutines broken. Data Raven gives the runner the option to either take a tag, or end the run when encountered before proceeding to its subroutine.
If the runner takes the option to end the run after encountering the Data Raven, do they still take the 3 net damage?
(This would also apply to a TollBooth the runner couldn't pay 3C towards)