Merge pull request #7768 from nyalldawson/assert

Throw an assert when using an unsupported variant type with QgsXmlUtils::writeVariant

Author: m-kuhn

src/core/qgsxmlutils.cpp

@@ -166,8 +166,7 @@ QDomElement QgsXmlUtils::writeVariant( const QVariant &value, QDomDocument &doc
     }
 
     default:
-      element.setAttribute( QStringLiteral( "type" ), QStringLiteral( "Unknown" ) );
-      element.setAttribute( QStringLiteral( "value" ), value.toString() );
+      Q_ASSERT_X( false, "QgsXmlUtils::writeVariant", "unsupported variant type" );
       break;
   }