A curious wrapper structure whose only purpose is to call
when it’s dropped abnormally.
src, which is a reference to a value of type
to a value of type
dst_ty, and stores the result in
argv values to pass to the rust start function.
main function which will initialize the rust runtime and call
users main function.
src_ty must be a pointer.
Retrieves the information we are losing (making dynamic) in an unsizing adjustment.
true if this session’s target will use SEH-based unwinding.