Merge "Fix fo() backdoor command for non-class objects"

oslo_service/eventlet_backdoor.py

@@ -86,7 +86,8 @@ def _detailed_dump_frames(f, thread_index):
 
 
 def _find_objects(t):
-    return [o for o in gc.get_objects() if isinstance(o, t)]
+    return [o for o in gc.get_objects()
+            if hasattr(o, "__class__") and isinstance(o, t)]
 
 
 def _capture_profile(fname=''):

releasenotes/notes/fix-find-object-in-backdoor-487bf78c4c502594.yaml

+---
+fixes:
+  - |
+    Fix the backdoor helper method fo() to also work when there are objects
+    present in the current python instance that do not have a __class__
+    attribute.