Subquery<String> subquery = criteriaQuery.subquery(String.class);
        Root<D> root2 = subquery.correlate(root);
        subquery.select(root2.get("id"))
                .where(root2.join("tags")
                            .get("id")
                            .in("a", "b"));
        return cb.exists(subquery);

java.lang.AssertionError
	at org.hibernate.query.sqm.tree.domain.AbstractSqmPath.copyTo(AbstractSqmPath.java:63)
	at org.hibernate.query.sqm.tree.domain.SqmBasicValuedSimplePath.copy(SqmBasicValuedSimplePath.java:63)
	at org.hibernate.query.sqm.tree.domain.SqmBasicValuedSimplePath.copy(SqmBasicValuedSimplePath.java:25)
	at org.hibernate.query.sqm.tree.domain.AbstractSqmPath.copyTo(AbstractSqmPath.java:69)
	at org.hibernate.query.sqm.tree.domain.AbstractSqmFrom.copyTo(AbstractSqmFrom.java:130)
	at org.hibernate.query.sqm.tree.domain.AbstractSqmQualifiedJoin.copyTo(AbstractSqmQualifiedJoin.java:39)
	at org.hibernate.query.sqm.tree.domain.SqmSetJoin.copy(SqmSetJoin.java:74)
	at org.hibernate.query.sqm.tree.domain.SqmSetJoin.copy(SqmSetJoin.java:32)
	at org.hibernate.query.sqm.tree.domain.AbstractSqmFrom.copyTo(AbstractSqmFrom.java:134)
	at org.hibernate.query.sqm.tree.from.SqmRoot.copyTo(SqmRoot.java:93)
	at org.hibernate.query.sqm.tree.domain.SqmCorrelatedRoot.copy(SqmCorrelatedRoot.java:41)
	at org.hibernate.query.sqm.tree.domain.SqmCorrelatedRoot.copy(SqmCorrelatedRoot.java:17)
	at org.hibernate.query.sqm.tree.from.SqmFromClause.<init>(SqmFromClause.java:40)
	at org.hibernate.query.sqm.tree.from.SqmFromClause.copy(SqmFromClause.java:46)
	at org.hibernate.query.sqm.tree.select.SqmQuerySpec.copy(SqmQuerySpec.java:101)
	at org.hibernate.query.sqm.tree.select.SqmQuerySpec.copy(SqmQuerySpec.java:56)
	at org.hibernate.query.sqm.tree.select.SqmSubQuery.copy(SqmSubQuery.java:149)
	at org.hibernate.query.sqm.tree.select.SqmSubQuery.copy(SqmSubQuery.java:75)
	at org.hibernate.query.sqm.tree.predicate.SqmExistsPredicate.copy(SqmExistsPredicate.java:45)
	at org.hibernate.query.sqm.tree.predicate.SqmExistsPredicate.copy(SqmExistsPredicate.java:17)
	at org.hibernate.query.sqm.tree.predicate.SqmWhereClause.copy(SqmWhereClause.java:33)
	at org.hibernate.query.sqm.tree.select.SqmQuerySpec.copy(SqmQuerySpec.java:107)
	at org.hibernate.query.sqm.tree.select.SqmQuerySpec.copy(SqmQuerySpec.java:56)
	at org.hibernate.query.sqm.tree.select.SqmSelectStatement.copy(SqmSelectStatement.java:131)
	at org.hibernate.query.sqm.tree.select.SqmSelectStatement.copy(SqmSelectStatement.java:42)
	at org.hibernate.query.sqm.internal.QuerySqmImpl.<init>(QuerySqmImpl.java:226)
	at org.hibernate.internal.AbstractSharedSessionContract.createCriteriaQuery(AbstractSharedSessionContract.java:1343)
	at org.hibernate.internal.AbstractSharedSessionContract.createQuery(AbstractSharedSessionContract.java:1304)
	at org.hibernate.internal.SessionImpl.createQuery(SessionImpl.java:190)
	at org.hibernate.bugs.JPAUnitTestCase.shouldQueryWhenTwoLevelsInHierarchy(JPAUnitTestCase.java:78)