Description of problem: create method of PartitionDevice class contains an 'except Exception' block [1] and inside of this block it raises a new instance of DeviceCreateError. This approach breaks ABRT's Duplicate search algorithm because all errors represented by descendants of Exception class are considered as single bug, since they all have equal back trace. https://git.fedorahosted.org/cgit/blivet.git/tree/blivet/devices.py#n1559
I'm sorry this is inconvenient from abrt's perspective, but it isn't as simple as re-raising any exception that we catch. That isn't manageable from the caller's perspective. I have plans to increase the granularity of the exceptions raised within blivet, but that is not a high priority in comparison with much of the other planned work.
(In reply to David Lehman from comment #1) From my point of view, this is inconvenient from user's perspective and maintainer's perspective. I have filed this bug report on behalf of all reporters which you have asked to open a separate bug report because the duplicate comment added by abrt was unrelated to the original report (i.e. bug 1021507 comment 20). Just for the clarification: you will refine the granularity, but it has low priority
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Will be fixed in F23.