There used to be a way (described here) to allocate class instances using custom allocation schemes, without modifying the code to the actual class. Apparently, calling f._ctor(args) doesn't work anymore. Please start allowing this again, as I really need it to create a method of allocating class instances w/ the new precise heap scanning stuff I'm working on.
Never mind, I just realized it's __ctor and it only works if the class has a constructor.