I just installed the latest Studio. It didn't fix a problem I had with an earlier version of 7.0. It always says "identifier unknown". Gdb or no gdb, it says the same thing. I tried various optimization things, including "Optimize debugging experience".
In the following pictures, signals is a class member. my_signals is a local, on the stack as you can see. I don't think I had this problem with Studio 6.2.
EDIT: Most of my functions could be inlined. Could that be the problem?