From b3238d57361bde667ea890b60a04c075eec2e952 Mon Sep 17 00:00:00 2001
From: Thomas Hartmann <thomas.hartmann@qt.io>
Date: Tue, 14 Mar 2017 15:59:17 +0100
Subject: [PATCH] QmlDesigner: Fix nodeAtTextCursorPositionRekursive()

If the length is -1 then the document is invalid and we should
return an invalid model node.

Change-Id: Id2a329a16617f862a518a3c1f00f9078697d72d8
Reviewed-by: Tim Jenssen <tim.jenssen@qt.io>
---
 src/plugins/qmldesigner/designercore/model/rewriterview.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/plugins/qmldesigner/designercore/model/rewriterview.cpp b/src/plugins/qmldesigner/designercore/model/rewriterview.cpp
index 4c58b573f48..1eff8b446fa 100644
--- a/src/plugins/qmldesigner/designercore/model/rewriterview.cpp
+++ b/src/plugins/qmldesigner/designercore/model/rewriterview.cpp
@@ -582,6 +582,10 @@ ModelNode RewriterView::nodeAtTextCursorPositionRekursive(const ModelNode &root,
 
     const int nodeTextLength = nodeLength(node);
     const int nodeTextOffset = nodeOffset(node);
+
+    if (nodeTextLength < 0)
+        return ModelNode();
+
     if (isInNodeDefinition(nodeTextOffset, nodeTextLength, cursorPosition))
         return node;