fix(bar): more bullet proofing toward auto-hide

Modules/Bar/Extras/BarWidgetLoader.qml

@@ -73,8 +73,33 @@ Item {
     id: loader
     anchors.fill: parent
     asynchronous: false
-    // Include reloadCounter in the binding to force re-evaluation
-    active: root.checkWidgetExists() && (root.reloadCounter >= 0)
+
+    // Deferred activation to prevent re-entrant incubation crash:
+    // When ListModel.append() creates this delegate, the Repeater is mid-incubation.
+    // If this Loader activates synchronously (asynchronous: false) during delegate
+    // finalization, it triggers nested QQmlIncubatorPrivate::incubate which corrupts
+    // the V4 heap (SIGSEGV in QV4::Object::insertMember).
+    // Deferring to the next event loop iteration breaks the nesting.
+    property bool _ready: false
+    active: _ready && root.checkWidgetExists() && (root.reloadCounter >= 0)
+
+    Timer {
+      id: activateTimer
+      interval: 0
+      onTriggered: loader._ready = true
+    }
+
+    Component.onCompleted: activateTimer.start()
+
+    // Reset _ready when reloadCounter changes to force a deferred re-activation
+    Connections {
+      target: root
+      function onReloadCounterChanged() {
+        loader._ready = false;
+        activateTimer.restart();
+      }
+    }
+
     sourceComponent: {
       // Depend on reloadCounter to force re-fetch of component
       var _ = root.reloadCounter;