Disk and CPU graphs on overview page are blank

With everything built daily from git master. 100% reproducible for me and has been for a few weeks.

Console output says the following:

$  (master) plasma-systemmonitor 
Cyclic dependency detected between "file:///home/nate/kde/usr/lib64/qml/org/kde/kirigami.2/styles/org.kde.desktop.plasma/Units.qml" and "file:///home/nate/kde/usr/lib64/qml/org/kde/kirigami.2/styles/org.kde.desktop.plasma/Units.qml"
QCoreApplication::postEvent: Unexpected null receiver
file:///home/nate/kde/usr/lib64/qml/org/kde/newstuff/qml/QuestionAsker.qml:91:5: QML Connections: Cannot assign to non-existent property "onClosing"
qt.core.qabstractitemmodel.checkindex: Index QModelIndex(-1,-1,0x0,QObject(0x0)) is not valid (expected valid)
file:///home/nate/kde/usr/lib64/qml/org/kde/kirigami.2/private/globaltoolbar/PageRowGlobalToolBarUI.qml:65:9: QML RowLayout (parent or ancestor of QQuickLayoutAttached): Binding loop detected for property "maximumWidth"
file:///home/nate/kde/usr/lib64/qml/org/kde/kirigami.2/private/globaltoolbar/PageRowGlobalToolBarUI.qml:65:9: QML RowLayout (parent or ancestor of QQuickLayoutAttached): Binding loop detected for property "maximumWidth"
file:///home/nate/kde/usr/lib64/qml/org/kde/kirigami.2/private/globaltoolbar/PageRowGlobalToolBarUI.qml:65:9: QML RowLayout (parent or ancestor of QQuickLayoutAttached): Binding loop detected for property "maximumWidth"
file:///home/nate/kde/usr/lib64/qml/QtQuick/Controls.2/org.kde.desktop/ScrollView.qml:102:27: QML ScrollBar: Binding loop detected for property "visible"