Note: neither the new nor the old data is actually correct, as the
debugger needs to stop on line 7 twice (once for the call, once for the
lambda) but ignore the synthetic line number in between.
The main goal is to make behavior similar to what happens in Java. For instance, now we always skip lambdas.
Also, we can reliably use '$i$f' and '$i$a' synthetic local variables. There is no need in complicated hacks any more.
pyos