1 files changed, 21 insertions, 0 deletions
diff --git a/tests/auto/widgets/effects/qgraphicseffect/tst_qgraphicseffect.cpp b/tests/auto/widgets/effects/qgraphicseffect/tst_qgraphicseffect.cpp
index a1cb729849..dfe5baba71 100644
--- a/tests/auto/widgets/effects/qgraphicseffect/tst_qgraphicseffect.cpp
+++ b/tests/auto/widgets/effects/qgraphicseffect/tst_qgraphicseffect.cpp
@@ -52,6 +52,7 @@ private slots:
     void boundingRect2();
     void draw();
     void opacity();
+    void nestedOpaqueOpacity();
     void grayscale();
     void colorize();
     void drawPixmapItem();
@@ -407,6 +408,26 @@ void tst_QGraphicsEffect::opacity()
     QCOMPARE(effect->m_opacity, qreal(0.5));
 }
 
+void tst_QGraphicsEffect::nestedOpaqueOpacity()
+{
+    // QTBUG-60231: Nesting widgets with a QGraphicsEffect on a toplevel with
+    // QGraphicsOpacityEffect caused crashes due to constructing several
+    // QPainter instances on a device in the fast path for
+    // QGraphicsOpacityEffect::opacity=1
+    QWidget topLevel;
+    topLevel.setWindowTitle(QTest::currentTestFunction());
+    topLevel.resize(320, 200);
+    QGraphicsOpacityEffect *opacityEffect = new QGraphicsOpacityEffect;
+    opacityEffect->setOpacity(1);
+    topLevel.setGraphicsEffect(opacityEffect);
+    QWidget *child = new QWidget(&topLevel);
+    child->resize(topLevel.size() / 2);
+    QGraphicsDropShadowEffect *childEffect = new QGraphicsDropShadowEffect;
+    child->setGraphicsEffect(childEffect);
+    topLevel.show();
+    QVERIFY(QTest::qWaitForWindowExposed(&topLevel));
+}
+
 void tst_QGraphicsEffect::grayscale()
 {
     if (qApp->desktop()->depth() < 24)