Comment by psychoslave

Looks like a limited debugger unable to let inspect what's happening in each chained function. Or is that something else?

I mean, it looks like the same level as adding explicit temporary variable because the debugger won't give provide values of the different part of an expression assigned to a third variable. That's a way to circumvent the tool limitation, just as you can add a tap or map in a middle of a chain if the debugger is too rudimentary to provide more conveniency.