1 files changed, 4 insertions, 1 deletions
diff --git a/src/splinechart/splinechartitem.cpp b/src/splinechart/splinechartitem.cpp
index 4a46a724..4f1162c1 100644
--- a/src/splinechart/splinechartitem.cpp
+++ b/src/splinechart/splinechartitem.cpp
@@ -141,6 +141,9 @@ void SplineChartItem::updateGeometry()
         qreal rightMarginLine = centerPoint.x() + margin;
         qreal horizontal = centerPoint.y();
 
+        // See ScatterChartItem::updateGeometry() for explanation why seriesLastIndex is needed
+        const int seriesLastIndex = m_series->count() - 1;
+
         for (int i = 1; i < points.size(); i++) {
             // Interpolating spline fragments accurately is not trivial, and would anyway be ugly
             // when thick pen is used, so we work around it by utilizing three separate
@@ -154,7 +157,7 @@ void SplineChartItem::updateGeometry()
             // degrees and both of the points are within the margin, one in the top half and one in the
             // bottom half of the chart, the bottom one gets clipped incorrectly.
             // However, this should be rare occurrence in any sensible chart.
-            currentSeriesPoint = m_series->pointAt(i);
+            currentSeriesPoint = m_series->pointAt(qMin(seriesLastIndex, i));
             currentGeometryPoint = points.at(i);
             pointOffGrid = (currentSeriesPoint.x() < minX || currentSeriesPoint.x() > maxX);