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Details

Type: Bug
Resolution: Done
Priority: P0: Blocker
Fix Version/s: 5.10.0 Beta 1
Affects Version/s: 5.10.0 Beta 1
Component/s: Quick: Controls 1
Labels:
None
Environment:
Android 7.0, Pixel C

Platform/s:

Android
Commits:
930aea8b9ca59a24838cf7f279653e3b2ee40cee (qtdeclarative), c0dbf5da64e6fc20d6edc59cc849e282e9bfea50 (qtquickcontrols)

Description

When launching an application that uses Qt Quick Controls with the current 5.10 branch, I get the following errors:

 
W libqtbug63172.so: file:///data/data/org.qtproject.example.qtbug63172/qt-reserved-files/qml/QtQuick/Controls/Styles/Android/ButtonStyle.qml:93 ((null)): file:///data/data/org.qtproject.example.qtbug63172/qt-reserved-files/qml/QtQuick/Controls/Styles/Android/ButtonStyle.qml:93:13: LabelStyle is not a type
E libqtbug63172.so: file:///data/data/org.qtproject.example.qtbug63172/qt-reserved-files/qml/QtQuick/Controls/Private/Control.qml:84 (onStatusChanged): qml: Failed to load Style for Button_QMLTYPE_34(0xcfef5120)
W libqtbug63172.so: file:///data/data/org.qtproject.example.qtbug63172/qt-reserved-files/qml/QtQuick/Controls/Styles/Android/ButtonStyle.qml:93 ((null)): file:///data/data/org.qtproject.example.qtbug63172/qt-reserved-files/qml/QtQuick/Controls/Styles/Android/ButtonStyle.qml:93:13: LabelStyle is not a type
E libqtbug63172.so: file:///data/data/org.qtproject.example.qtbug63172/qt-reserved-files/qml/QtQuick/Controls/Private/Control.qml:84 (onStatusChanged): qml: Failed to load Style for Button_QMLTYPE_34(0xe6ed2880)
W libqtbug63172.so: file:///data/data/org.qtproject.example.qtbug63172/qt-reserved-files/qml/QtQuick/Controls/Button.qml:99 ((null)): file:///data/data/org.qtproject.example.qtbug63172/qt-reserved-files/qml/QtQuick/Controls/Button.qml:99: TypeError: Cannot read property of null
W libqtbug63172.so: file:///data/data/org.qtproject.example.qtbug63172/qt-reserved-files/qml/QtQuick/Controls/Button.qml:99 ((null)): file:///data/data/org.qtproject.example.qtbug63172/qt-reserved-files/qml/QtQuick/Controls/Button.qml:99: TypeError: Cannot read property of null

And a blank screen. The same application works fine with Qt 5.9.

Reproducible with this small example:

 
import QtQuick 2.8
import QtQuick.Window 2.2
import QtQuick.Controls 1.4

Window {
    visible: true
    width: 640
    height: 480
    title: qsTr("Hello World")

    Button {
        anchors.centerIn: parent
    }
}