Fixed endless loop when printing a QTextDocument.

If the user enters a valid page range, which lies outside of the actual
number of printable pages, we can't detect that until the document
has been paginated.

Task-number: QTBUG-6051
Reviewed-by: Kim

1 files changed, 6 insertions, 0 deletions

diff --git a/src/gui/text/qtextdocument.cpp b/src/gui/text/qtextdocument.cpp
index 048325c036..523dd18c86 100644
--- a/src/gui/text/qtextdocument.cpp
+++ b/src/gui/text/qtextdocument.cpp
@@ -1767,6 +1767,12 @@ void QTextDocument::print(QPrinter *printer) const
     fromPage = qMax(1, fromPage);
     toPage = qMin(doc->pageCount(), toPage);
 
+    if (toPage < fromPage) {
+        // if the user entered a page range outside the actual number
+        // of printable pages, just return
+        return;
+    }
+
     if (printer->pageOrder() == QPrinter::LastPageFirst) {
         int tmp = fromPage;
         fromPage = toPage;