[Oxygen] [Bug 403978] oxygen theme incompatible with qt5 5.12.1-1 libs

[Benjamin Robin]

https://bugs.kde.org/show_bug.cgi?id=403978

--- Comment #22 from Benjamin Robin <benjarobin+kde at gmail.com> ---
I am moving the discussion back to the Qt bug report
(https://bugreports.qt.io/browse/QTBUG-73691). The web site is down for now...

Here the patch in order to properly fix the problem:

diff --git a/src/controls/Styles/Base/ScrollViewStyle.qml
b/src/controls/Styles/Base/ScrollViewStyle.qml
index 6750399d..36b518d3 100644
--- a/src/controls/Styles/Base/ScrollViewStyle.qml
+++ b/src/controls/Styles/Base/ScrollViewStyle.qml
@@ -370,8 +370,8 @@ Style {

         property var flickableItem: control.flickableItem
         property int extent: Math.max(minimumHandleLength,
__styleData.horizontal ?
-                                          Math.min(1, (flickableItem ?
flickableItem.width/flickableItem.contentWidth : 1)) * bg.width :
-                                          Math.min(1, (flickableItem ?
flickableItem.height/flickableItem.contentHeight : 1)) * bg.height)
+                                          Math.min(1, ((flickableItem &&
flickableItem.contentWidth > 0.0) ?
flickableItem.width/flickableItem.contentWidth : 1)) * bg.width :
+                                          Math.min(1, ((flickableItem &&
flickableItem.contentHeight > 0.0) ?
flickableItem.height/flickableItem.contentHeight : 1)) * bg.height)
         readonly property real range: __control.maximumValue -
__control.minimumValue
         readonly property real begin: __control.value - __control.minimumValue

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