for _, w := range ft.Copyto {
		w.SetUnderlying(t)
	}

	// Double-check use of type as embedded type.
	if ft.Embedlineno.IsKnown() {
		if t.IsPtr() || t.IsUnsafePtr() {
			base.ErrorfAt(ft.Embedlineno, errors.InvalidPtrEmbed, "embedded type cannot be a pointer")
		}
	}
}

func fieldsHasShape(fields []*Field) bool {
	for _, f := range fields {
		if f.Type != nil && f.Type.HasShape() {