CPP13 — Variable-length out params and exceptions

the spec is currently not terribly clear about the server's responsibilities
when throwing an exception from an operation that has a variable-length
out param.

The intent of the spec is that the server is responsible for deleting
the memory it allocated to an out param before it throws an exception:

// Correct implementation
void
Foo_impl::
op(CORBA::String_out out_p) throw(CORBA::SystemException)

// Incorrect implementation
void
Foo_impl::
op(CORBA::String_out out_p) throw(CORBA::SystemException)

However, the spec never states this clearly. In fact, it sort of says
the opposite. On page 1-110, table item 3:

To maintain local/remote transparency, the caller must always
release the returned storage, regardless of whether the callee
is located in the same address space as the caller or is located
in a different address space.

There is no mention here of what should happen in the presence of exceptions.

I think it would be nice to clarify that the skeleton will never look
at an out param in the presence of exceptions and that the operation
implementation is responsible for deallocating memory in this case.