QQmlPropertyBinding: Create more verbose binding loop warning

Change-Id: I6f83fc61c72993c04c99ff16c31c10b20ada5db8
Reviewed-by: Ulf Hermann <ulf.hermann@qt.io>

1 files changed, 6 insertions, 1 deletions

diff --git a/src/qml/qml/qqmlpropertybinding.cpp b/src/qml/qml/qqmlpropertybinding.cpp
index 313cd7f395..c0b2d75c6e 100644
--- a/src/qml/qml/qqmlpropertybinding.cpp
+++ b/src/qml/qml/qqmlpropertybinding.cpp
@@ -86,7 +86,12 @@ void QQmlPropertyBinding::expressionChanged()
         err.setUrl(QUrl{location.sourceFile});
         err.setLine(location.line);
         err.setColumn(location.column);
-        err.setDescription(QString::fromLatin1("Binding loop detected"));
+        const auto ctxt = context();
+        QQmlEngine *engine = ctxt ? ctxt->engine() : nullptr;
+        if (engine)
+            err.setDescription(createBindingLoopErrorDescription(QQmlEnginePrivate::get(engine)));
+        else
+            err.setDescription(QString::fromLatin1("Binding loop detected"));
         err.setObject(target());
         qmlWarning(this->scopeObject(), err);
         return;