Ocamldebug: breakpoints and functors

I have a functor which contains a function f on line 10.

When I try to set a breakpoint on that line I get Can't find any event there.. Fair enough.

So what I tried next was going to the call site and using step to step into the function f. It just stepped over that function call.

My last try was getting address of that function and setting a breakpoint there but it didn’t work either.

Is there a way to debug a function inside a functor?