Issue is NOT resolved in Plasma 5.5.5:
[112668.532598] kactivitymanage[2435]: segfault at 7f83f5993cd0 ip 00007f83dc1c2261 sp 00007fff121c5478 error 4 in libQt5Sql.so.5.5.1[7f83dc1ae000+3f000]
Issue is NOT resolved in Plasma 5.5.5:
[112668.532598] kactivitymanage [2435]: segfault at 7f83f5993cd0 ip 00007f83dc1c2261 sp 00007fff121c5478 error 4 in libQt5Sql. so.5.5. 1[7f83dc1ae000+ 3f000]