This bug was filed from the crash reporting server and is br-a03080bc-3d46-4f86-b1dd-18281658aade.
Worked on a file, everything worked fine. Saved file: closed it -> got message(with code above) that writer crashed.
I do not know what went wrong, but i decided to put in bugreport here.
Thanks for reporting the issue.
This is the same crash as in bug 117824 and it should be fixed in LibreOffice 6.0.6...
Closing as RESOLVED DUPLICATED
*** This bug has been marked as a duplicate of bug 117824 ***