Bug#996726: libkdecorations2-5v5 freeze KDE on login, general protection fault

[Jeroen Tirry]

Package: libkdecorations2-5v5
Version: 4:5.23.0-2

After upgrade from version 4:5.21.5-2, after login the KDE session 
freezes completly.
The mouse pointer still moves, but the spinning circle stops.
From the journalctl:

Oct 17 20:45:37 kernel: traps :kde5[4854] general protection fault 
ip:7f5eb66ed510 sp:7ffdef9478d0 error 0 in 
libkdecorations2.so.5.23.0[7f5eb66df000+f000]

Debian/testing
SMP Debian 5.14.9-2

Greetings,

Jeroen