if source was deleted do not access source

securedrop_client/gui/widgets.py

@@ -845,15 +845,15 @@ def update(self, sources: List[Source]):
             list_item = self.item(i)
             list_widget = self.itemWidget(list_item)
 
-            if list_widget and list_widget.source.uuid not in source_uuids:
+            if list_widget and list_widget.uuid not in source_uuids:
                 if list_item.isSelected():
                     self.setCurrentItem(None)
-                del self.source_widgets[list_widget.source.uuid]
+                del self.source_widgets[list_widget.source_uuid]
                 self.takeItem(i)
                 list_widget.deleteLater()
 
         # Create new widgets for new sources
-        widget_uuids = [self.itemWidget(self.item(i)).source.uuid for i in range(self.count())]
+        widget_uuids = [self.itemWidget(self.item(i)).source_uuid for i in range(self.count())]
         for source in sources:
             if source.uuid not in widget_uuids:
                 new_source = SourceWidget(source)
@@ -949,6 +949,7 @@ def __init__(self, source: Source):
 
         # Store source
         self.source = source
+        self.source_uuid = source.uuid
 
         # Set styles
         self.setStyleSheet(self.CSS)