I found some > 6 year old threads on this list
(http://caml.inria.fr/pub/ml-archives/caml-list/2000/07/5a1aa1b9873679a2bf87fce5c55f342f.en.html)
having to do with the fact that you couldn't get backtraces on caught
exceptions without using camlp4.

Is this still the case?

I'm using a unit testing framework, and it catches thrown exceptions
and uses Printexc.print to print out the exception. However, this
omits the most useful piece of information: the source line that threw
the exception. Is there anyway to get there, short of setting
OCAMLRUNPARAM="b" and letting it propagate to the source level (or
using the debugger)?

Thanks in advance.

-Denis