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-rw-r--r--src/gui/text/qtextdocumentlayout.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/gui/text/qtextdocumentlayout.cpp b/src/gui/text/qtextdocumentlayout.cpp
index 838face..684de00 100644
--- a/src/gui/text/qtextdocumentlayout.cpp
+++ b/src/gui/text/qtextdocumentlayout.cpp
@@ -3160,7 +3160,7 @@ QRectF QTextDocumentLayoutPrivate::frameBoundingRectInternal(QTextFrame *frame)
QRectF QTextDocumentLayout::blockBoundingRect(const QTextBlock &block) const
{
Q_D(const QTextDocumentLayout);
- if (d->docPrivate->pageSize.isNull())
+ if (d->docPrivate->pageSize.isNull() || !block.isValid())
return QRectF();
d->ensureLayoutedByPosition(block.position() + block.length());
QTextFrame *frame = d->document->frameAt(block.position());