- 
    Type:
Bug
 - 
    Resolution: Done
 - 
    Priority:
Major - P3
 - 
    Affects Version/s: 2.12.0
 - 
    Component/s: Write Operations
 - 
    None
 
- 
        None
 
- 
        None
 - 
        None
 - 
        None
 - 
        None
 - 
        None
 - 
        None
 
Running against MongoDB 2.6, WriteResult.isUpdateOfExisting reports wrong value for an update that does not modify any documents. While it does report n = 0, it reports updateOfExisting = true, and it should be false.