QmlJS: Make Document::Ptr point to a const Document.

Change-Id: I15a36c3f918c0ee16f30bc8366df505e0afac949
Reviewed-by: Fawzi Mohamed <fawzi.mohamed@nokia.com>

1 files changed, 5 insertions, 3 deletions

diff --git a/src/plugins/qmljseditor/qmlexpressionundercursor.cpp b/src/plugins/qmljseditor/qmlexpressionundercursor.cpp
index 60e90b60de..686ed040c8 100644
--- a/src/plugins/qmljseditor/qmlexpressionundercursor.cpp
+++ b/src/plugins/qmljseditor/qmlexpressionundercursor.cpp
@@ -136,9 +136,11 @@ QmlJS::AST::ExpressionNode *QmlExpressionUnderCursor::operator()(const QTextCurs
     ExpressionUnderCursor expressionUnderCursor;
     _text = expressionUnderCursor(cursor);
 
-    exprDoc = Document::create(QLatin1String("<expression>"), Document::JavaScriptLanguage);
-    exprDoc->setSource(_text);
-    exprDoc->parseExpression();
+    Document::MutablePtr newDoc = Document::create(
+                QLatin1String("<expression>"), Document::JavaScriptLanguage);
+    newDoc->setSource(_text);
+    newDoc->parseExpression();
+    exprDoc = newDoc;
 
     _expressionNode = exprDoc->expression();