It is very unlikely that the guys who discovered Heartbleed as a SIGINT opportunity had any channels at all to warn other arms of the agency that it might be a vulnerability on our side; consider how such channels could and would be misused in so many other situations. The spooks would never implement such a thing. From the SIGINT side Heartbleed is a low-level technical detail, hardly worth the attention of a Civil Service level adminstrator except for the ops that it makes possible.
While computer languages are about math a lot more than human languages, coding isn't really like doing math. It's more like telling the machine how to do math, which the machine then does for you.