Fix detaching of temporary container

Thanks to Clazy
qgis · Aug 29, 2017 · 5197b5f · 5197b5f
1 parent a4357e3
commit 5197b5f
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/core/expression/qgsexpressionnodeimpl.cpp b/src/core/expression/qgsexpressionnodeimpl.cpp
@@ -949,7 +949,7 @@ QSet<QString> QgsExpressionNodeFunction::referencedVariables() const
   {
     if ( !mArgs->list().isEmpty() )
     {
-      QgsExpressionNodeLiteral *var = dynamic_cast<QgsExpressionNodeLiteral *>( mArgs->list().first() );
+      QgsExpressionNodeLiteral *var = dynamic_cast<QgsExpressionNodeLiteral *>( mArgs->list().at( 0 ) );
       if ( var )
         return QSet<QString>() << var->value().toString();
     }