IllegalStateException: Unexpected AST: org.hibernate.hql.internal.ast.tree.SqlNode executing HQL SELECT with a constructor expression containing null in JBoss EAP

Issue

• Executing an HQL query using a constructor expression in the select clause where Employee is an entity type

  SELECT new support.hibernate.dto.Pair(e, null) FROM Employee e WHERE e.name = :name
  

• After applying JBoss EAP 6.4 cumulative patch 10, encountering the following failure

  java.lang.IllegalStateException: Unexpected AST: org.hibernate.hql.internal.ast.tree.SqlNode 
   \-[NULL] SqlNode: 'null'
  
      at org.hibernate.hql.internal.ast.tree.SelectExpressionList.collectSelectExpressions(SelectExpressionList.java:55)
      at org.hibernate.hql.internal.ast.tree.ConstructorNode.resolveConstructorArgumentTypes(ConstructorNode.java:159)
      at org.hibernate.hql.internal.ast.tree.ConstructorNode.prepare(ConstructorNode.java:142)
      ...
      at org.hibernate.internal.SessionImpl.createQuery(SessionImpl.java:1739)
      at org.hibernate.ejb.AbstractEntityManagerImpl.createQuery(AbstractEntityManagerImpl.java:291)
      ...
  

• After applying JBoss EAP 7.0 cumulative patch 3, encountering the following failure

  java.lang.NullPointerException
      at org.hibernate.hql.internal.NameGenerator.generateColumnNames(NameGenerator.java:27)
      at org.hibernate.hql.internal.ast.util.SessionFactoryHelper.generateColumnNames(SessionFactoryHelper.java:418)
      at org.hibernate.hql.internal.ast.tree.SelectClause.initializeColumnNames(SelectClause.java:267)
      ...
      at org.hibernate.internal.SessionImpl.createQuery(SessionImpl.java:1894)
      at org.hibernate.jpa.spi.AbstractEntityManagerImpl.createQuery(AbstractEntityManagerImpl.java:291)
      ...