Using caller you are supposed to be able to generate a complete stack backtrace
Wouldn't:
Be aware that the optimizer might have optimized
call frames away before "caller" had a chance to
get the information. That means that caller(N)
might not return information about the call frame
you expect it do, for "N > 1". In particular,
@DB::args might have information from the previous
time "caller" was called.
(from caller's docs) let you out of that particular hole? Tail recursion would just be another case to add to the existing ones. Not entirely backwards compatable, but not so bad as to disallow the concept I would have thought...
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