Symptoms
Microsoft SQL Server 2017 stops responding and generates a crash dump file when you use the large objects (LOB) data type together with columnstore indexes.
Note If the current object's reference count reaches zero, the object is destroyed. When you try to access a member variable from the destroyed object, an access violation (AV) occurs.
Resolution
This issue is fixed in the following cumulative updates for SQL Server:
Cumulative Update 27 for SQL Server 2017
About cumulative updates for SQL Server:
Each new cumulative update for SQL Server contains all the hotfixes and all the security fixes that were included with the previous cumulative update. Check out the latest cumulative updates for SQL Server:
Latest cumulative update for SQL Server 2017
Status
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
References
Learn about the terminology that Microsoft uses to describe software updates.