Merge remote-tracking branch 'origin/5.15' into dev

Change-Id: I903b266d7496e9241eecf1de0c27dfc871e8d561

dist/changes-5.15.0

@@ -0,0 +1,18 @@
+Qt 5.15 introduces many new features and improvements as well as bugfixes
+over the 5.14.x series. For more details, refer to the online documentation
+included in this distribution. The documentation is also available online:
+
+https://doc.qt.io/qt-5/index.html
+
+The Qt version 5.15 series is binary compatible with the 5.14.x series.
+Applications compiled for 5.14 will continue to run with 5.15.
+
+Some of the changes listed in this file include issue tracking numbers
+corresponding to tasks in the Qt Bug Tracker:
+
+https://bugreports.qt.io/
+
+Each of these identifiers can be entered in the bug tracker to obtain more
+information about a particular change.
+
+ - This release contains only minor code improvements.

src/coap/qcoapinternalreply.cpp

@@ -123,7 +123,7 @@ QCoapInternalReply *QCoapInternalReply::createFromFrame(const QByteArray &reply,
     }
 
     // Parse Payload
-    if (pduData[i] == 0xFF) {
+    if (i < reply.length() && pduData[i] == 0xFF) {
         // -1 because of 0xFF at the beginning
         QByteArray currentPayload = reply.mid(i + 1);
         d->message.setPayload(d->message.payload().append(currentPayload));