state.enc.encodeInterface(state.b, iv)
			}
		}
	}
	if op == nil {
		errorf("can't happen: encode type %s", rt)
	}
	return &op, indir
}

// gobEncodeOpFor returns the op for a type that is known to implement GobEncoder.
func gobEncodeOpFor(ut *userTypeInfo) (*encOp, int) {
	rt := ut.user
	if ut.encIndir == -1 {
		rt = reflect.PointerTo(rt)
	} else if ut.encIndir > 0 {