[Bug 1763974] systemsettings5 crashed with SIGSEGV in __GI_raise()

[Apport retracing service]

StacktraceTop:
 ?? ()
 QObjectData::dynamicMetaObject (this=<optimized out>) at kernel/qobject.cpp:203
 QMetaObject::cast (this=0x7fabfab29540 <QWidgetWindow::staticMetaObject>, obj=obj at entry=0x55d7db6d1aa0) at kernel/qmetaobject.cpp:366
 QMetaObject::cast (this=<optimized out>, obj=obj at entry=0x55d7db6d1aa0) at kernel/qmetaobject.cpp:355
 qobject_cast<QWidgetWindow*> (object=0x55d7db6d1aa0) at ../../include/QtCore/../../src/corelib/kernel/qobject.h:514

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https://bugs.launchpad.net/bugs/1763974

Title:
  systemsettings5 crashed with SIGSEGV in
  QObjectData::dynamicMetaObject()

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