// set up with empty interface
					(*eface)(r)._type = &f.ot.Type
					(*eface)(r).data = f.arg
					if len(ityp.Methods) != 0 {
						// convert to interface with methods
						// this conversion is guaranteed to succeed - we checked in SetFinalizer
						(*iface)(r).tab = assertE2I(ityp, (*eface)(r)._type)
					}
				default:
					throw("bad kind in runfinq")
				}

				reflectdata.MarkTypeSymUsedInInterface(r.Sym, f.fe.Func().Linksym())
			} else if strings.HasPrefix(r.Sym.Name, "go:itab") {
				// Same, but if we're using an itab we need to record that the
				// itab._type might be put in an interface.
				reflectdata.MarkTypeSymUsedInInterface(r.Sym, f.fe.Func().Linksym())
			}
			return r.Sym
		}
	}
	base.Fatalf("fixedSym data not known for %s:%d", sym, off)
	return nil

}

// dottype1 implements a x.(T) operation. iface is the argument (x), dst is the type we're asserting to (T)
// and src is the type we're asserting from.
// source is the *runtime._type of src
// target is the *runtime._type of dst.
// If src is a nonempty interface and dst is not an interface, targetItab is an itab representing (dst, src). Otherwise it is nil.