After a partial update of Qt5 from 10/04/2018, plasmashell does not work. When you try to start, you receive a message plasmashell: relocation error: /lib64/libKF5Declarative.so.5: symbol _ZN15QQmlPropertyMap15allocatePrivateEv, version Qt_5 not defined in file libQt5Qml.so.5 with link time reference KF5 version 5.42.0 Qt5 version 5.9.4 and 5.10.1 libQt5Qml version 5.10.1 (64-bit) How reproducible: After the system is rebooted, there is no Plasma menu. An attempt to start the plasmashell from the console produces the message shown above. Steps to Reproduce: 1. 2. 3.
Solved today after updating to lib64kf5declarative5-5.42.0-2
Resolution: (none) => FIXEDStatus: NEW => RESOLVED