It would be a *HUGE* debugging help, if there would be a function that returns the current caller function stack. So on a given position or in an error condition, one could just output the nested function calls to this position. 

Debugging without is quite hard if you have utility functions/methods that are used widely in a project. If they produce an error because of the params, how can u find out which function/method called it (thus must be debugged)?

Such a debugging function would just be great - imho of better use than the variables snapshot with the current debug functions.

Regards, Martin Bachmann