I have to disable nepomuk , system settings -> desktop search -> disable PIM data indexer , else this SIGSEGV happens frequently and put my laptop with very high usage of CPU .
The referenced retrace link gives error: Page not found (404)
not my fault this a bug on https://retrace.fedoraproject.org on abrt
Retrace link now work. https://github.com/abrt/faf/issues/235#issuecomment-47885523
*** This bug has been marked as a duplicate of bug 1013705 ***