//
// If the allowed predicate returns an error not equivalent to ErrDisallowed,
// filterVersions returns that error.
func (qm *queryMatcher) filterVersions(ctx context.Context, versions []string) (releases, prereleases []string, err error) {
	needIncompatible := qm.preferIncompatible

	var lastCompatible string
	for _, v := range versions {
		if !qm.allowsVersion(ctx, v) {
			continue
		}