if t, ok := c.m[key]; ok {
			if t.Go == nil {
				fatalf("%s: type conversion loop at %s", lineno(pos), dtype)
			}
			return t
		}
	}

	t := new(Type)
	t.Size = dtype.Size() // note: wrong for array of pointers, corrected below
	t.Align = -1
	t.C = &TypeRepr{Repr: dtype.Common().Name}
	c.m[key] = t

	switch dt := dtype.(type) {
	default: