Description:
After updating plasma packages via kde-unstable in the past hour or two and re-logging in plasmashell will no longer start, reports a segfault

Additional info:
* package version(s): plasma-workspace 5.2.95-2 via kde-unstable

Steps to reproduce:
1. update packages via kde-unstable
2. log in

GDB Output:
Starting program: /usr/bin/plasmashell
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib/libthread_db.so.1".
kf5.kservice.sycoca: Trying to open ksycoca from "/home/craig/.cache/ksycoca5"
populateAddPanelsMenu 1
[New Thread 0x7fffdb09c700 (LWP 3504)]
[New Thread 0x7fffd07ac700 (LWP 3505)]
kscreen: launcherDataAvailable: "org.kde.KScreen.Backend.XRandR"
kscreen: Launcher finished with exit code 1 , status 0
kscreen: Service for requested backend already running
kscreen: Primary output changed from KScreen::Output(Id: 639 , Name: "DVI-I-1" ) ( "DVI-I-1" ) to KScreen::Output(Id: 639 , Name: "DVI-I-1" ) ( "DVI-I-1" )
[New Thread 0x7fff717fc700 (LWP 3528)]
kf5.kservice.sycoca: Trying to open ksycoca from "/home/craig/.cache/ksycoca5"
[New Thread 0x7fff857fd700 (LWP 3524)]
file:///usr/share/plasma/packages/org.kde.desktoptoolbox/contents/ui/ToolBoxRoot.qml:120: TypeError: Property 'adjustToAvailableScreenRegion' of object ContainmentInterface(0x1d0b530) is not a function
[New Thread 0x7ffee35ef700 (LWP 3529)]
kf5.kservice.sycoca: Trying to open ksycoca from "/home/craig/.cache/ksycoca5"
file:///usr/share/plasma/packages/org.kde.desktoptoolbox/contents/ui/ToolBoxRoot.qml:120: TypeError: Property 'adjustToAvailableScreenRegion' of object ContainmentInterface(0x144a510) is not a function
kf5.kservice.sycoca: Trying to open ksycoca from "/home/craig/.cache/ksycoca5"
file:///usr/share/plasma/packages/org.kde.desktoptoolbox/contents/ui/ToolBoxRoot.qml:120: TypeError: Property 'adjustToAvailableScreenRegion' of object ContainmentInterface(0xbcdee0) is not a function
kf5.kservice.sycoca: Trying to open ksycoca from "/home/craig/.cache/ksycoca5"
file:///usr/share/plasma/packages/org.kde.desktoptoolbox/contents/ui/ToolBoxRoot.qml:120: TypeError: Property 'adjustToAvailableScreenRegion' of object ContainmentInterface(0x162eb10) is not a function
No metadata file in the package, expected it at: "/usr/share/wallpapers/Auros/contents/images//metadata.desktop"
No metadata file in the package, expected it at: "/usr/share/wallpapers/Auros/contents/images//metadata.desktop"
No metadata file in the package, expected it at: "/usr/share/wallpapers/Auros/contents/images//metadata.desktop"
No metadata file in the package, expected it at: "/usr/share/wallpapers/Auros/contents/images//metadata.desktop"
No metadata file in the package, expected it at: "/usr/share/wallpapers/Auros/contents/images//metadata.desktop"
No metadata file in the package, expected it at: "/usr/share/wallpapers/Auros/contents/images//metadata.desktop"
No metadata file in the package, expected it at: "/usr/share/wallpapers/Auros/contents/images//metadata.desktop"
No metadata file in the package, expected it at: "/usr/share/wallpapers/Auros/contents/images//metadata.desktop"
No metadata file in the package, expected it at: "/usr/share/wallpapers/Auros/contents/images//metadata.desktop"
No metadata file in the package, expected it at: "/usr/share/wallpapers/Auros/contents/images//metadata.desktop"
No metadata file in the package, expected it at: "/usr/share/wallpapers/Auros/contents/images//metadata.desktop"
No metadata file in the package, expected it at: "/usr/share/wallpapers/Auros/contents/images//metadata.desktop"
file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/views/Panel.qml:30:5: Cannot assign to non-existent property "onRepaintNeeded"
onRepaintNeeded: adjustPrefix();
^
Could not set containment property on rootObject
file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/views/Panel.qml:30:5: Cannot assign to non-existent property "onRepaintNeeded"
onRepaintNeeded: adjustPrefix();
^
Could not set containment property on rootObject
file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/views/Panel.qml:30:5: Cannot assign to non-existent property "onRepaintNeeded"
onRepaintNeeded: adjustPrefix();
^
Could not set containment property on rootObject
file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/views/Panel.qml:30:5: Cannot assign to non-existent property "onRepaintNeeded"
onRepaintNeeded: adjustPrefix();
^
Could not set containment property on rootObject
kscreen: Primary output changed from KScreen::Output(Id: 639 , Name: "DVI-I-1" ) ( "DVI-I-1" ) to KScreen::Output(Id: 639 , Name: "DVI-I-1" ) ( "DVI-I-1" )
file:///usr/share/plasma/packages/org.kde.desktoptoolbox/contents/ui/ToolBoxRoot.qml:120: TypeError: Property 'adjustToAvailableScreenRegion' of object ContainmentInterface(0x1d0b530) is not a function
file:///usr/share/plasma/packages/org.kde.desktoptoolbox/contents/ui/ToolBoxRoot.qml:120: TypeError: Property 'adjustToAvailableScreenRegion' of object ContainmentInterface(0x144a510) is not a function
file:///usr/share/plasma/packages/org.kde.desktoptoolbox/contents/ui/ToolBoxRoot.qml:120: TypeError: Property 'adjustToAvailableScreenRegion' of object ContainmentInterface(0xbcdee0) is not a function
file:///usr/share/plasma/packages/org.kde.desktoptoolbox/contents/ui/ToolBoxRoot.qml:120: TypeError: Property 'adjustToAvailableScreenRegion' of object ContainmentInterface(0x162eb10) is not a function
[New Thread 0x7ffe7d6fb700 (LWP 3551)]
[New Thread 0x7ffe7dffc700 (LWP 3550)]
[New Thread 0x7ffe7e7fd700 (LWP 3549)]
[New Thread 0x7ffe7effe700 (LWP 3548)]
[New Thread 0x7ffe8510a700 (LWP 3547)]
[New Thread 0x7ffe877ff700 (LWP 3546)]
[New Thread 0x7ffe8e3fe700 (LWP 3545)]
[New Thread 0x7ffe9d7fd700 (LWP 3544)]
[New Thread 0x7ffe9e7fe700 (LWP 3543)]
[New Thread 0x7ffe9f7ff700 (LWP 3542)]
[New Thread 0x7ffeb4a15700 (LWP 3541)]
[New Thread 0x7ffeb5a16700 (LWP 3540)]
[New Thread 0x7ffeb690a700 (LWP 3539)]
[New Thread 0x7ffeb77fe700 (LWP 3538)]
[New Thread 0x7ffeb7fff700 (LWP 3537)]
[New Thread 0x7ffec55ed700 (LWP 3536)]
[New Thread 0x7ffec65ee700 (LWP 3535)]
[New Thread 0x7ffec7fff700 (LWP 3534)]
[New Thread 0x7ffed95ed700 (LWP 3533)]
[New Thread 0x7ffedaffe700 (LWP 3532)]
[New Thread 0x7ffedbfff700 (LWP 3531)]
[New Thread 0x7ffee2314700 (LWP 3530)]
[New Thread 0x7fff71ffd700 (LWP 3527)]
[New Thread 0x7fff72ffe700 (LWP 3526)]
[New Thread 0x7fff73fff700 (LWP 3525)]
[New Thread 0x7fff867fe700 (LWP 3523)]
[New Thread 0x7fff877ff700 (LWP 3522)]
[New Thread 0x7fff94ffc700 (LWP 3521)]
[New Thread 0x7fff95ffd700 (LWP 3520)]
[New Thread 0x7fff96ffe700 (LWP 3519)]
[New Thread 0x7fff97fff700 (LWP 3518)]
[New Thread 0x7fffa97fd700 (LWP 3517)]
[New Thread 0x7fffaa7fe700 (LWP 3516)]
[New Thread 0x7fffab7ff700 (LWP 3515)]
[New Thread 0x7fffbcb82700 (LWP 3514)]
[New Thread 0x7fffbdffd700 (LWP 3513)]
[New Thread 0x7fffbeffe700 (LWP 3512)]
[New Thread 0x7fffbffff700 (LWP 3511)]
[New Thread 0x7fffcd60a700 (LWP 3510)]
[New Thread 0x7fffce70b700 (LWP 3509)]
[New Thread 0x7fffcf140700 (LWP 3506)]
[New Thread 0x7fffe14c5700 (LWP 3503)]

Program received signal SIGSEGV, Segmentation fault.
0x00007ffff7f2409d in QX11Info::isPlatformX11() () from /usr/lib/libQt5X11Extras.so.5