Roo generates finder with unresolved local jpaQuery variable in sortFieldName method

Here's a roo generated finder method that contains an unresolved local variable "jpaQuery":

public static TypedQuery<CmTitle> CmTitle.findCmTitlesByCategories(Set<Category> categories, String sortFieldName, String sortOrder) {
if (categories == null) throw new IllegalArgumentException("The categories argument is required");
EntityManager em = CmTitle.entityManager();
StringBuilder queryBuilder = new StringBuilder("SELECT o FROM CmTitle AS o WHERE");
for (int i = 0; i < categories.size(); i++)

{ if (i > 0) queryBuilder.append(" AND"); queryBuilder.append(" :categories_item").append(i).append(" MEMBER OF o.categories"); }

if (fieldNames4OrderClauseFilter.contains(sortFieldName)) {
jpaQuery = jpaQuery + " ORDER BY " + sortFieldName;
if ("ASC".equalsIgnoreCase(sortOrder) || "DESC".equalsIgnoreCase(sortOrder))

{ queryBuilder.append(" " + sortOrder); }

}
TypedQuery<CmTitle> q = em.createQuery(queryBuilder.toString(), CmTitle.class);
int categoriesIndex = 0;
for (Category _category: categories)

{ q.setParameter("categories_item" + categoriesIndex++, _category); }

return q;
}