Need emergency button
A bad runtime was published on Sunday this week resulting in all GTK+ applications crashing on startup. Today is Thursday and it's still not fixed. So any users relying on our applications have been out of luck all week. Our current method of trying to fix this is committing speculative fixes, then checking the next day whether the issue is resolved. Too slow. And it's not the first time this has happened recently.
We need an emergency button to immediately revert a bad runtime commit, publish the result, and disable publish of future builds until we're sure the issue is resolved.