correctly deal with changed

lib/ansible/executor/task_result.py

@@ -10,7 +10,7 @@ from copy import deepcopy
 from ansible.parsing.dataloader import DataLoader
 from ansible.vars.manager import strip_internal_keys
 
-_IGNORE = ('changed', 'failed', 'skipped')
+_IGNORE = ('failed', 'skipped')
 
 
 class TaskResult:

lib/ansible/plugins/callback/__init__.py

@@ -218,7 +218,10 @@ class CallbackBase(AnsiblePlugin):
 
     def _clean_results(self, result, task_name):
         ''' removes data from results for display '''
-        pass
+        if task_name in ['debug']:
+            for remove_key in ('invocation'):
+                if remove_key in result:
+                    del result[remove_key]
 
     def set_play_context(self, play_context):
         pass

lib/ansible/plugins/callback/default.py

@@ -95,6 +95,8 @@ class CallbackModule(CallbackBase):
         else:
 
             if (self._display.verbosity > 0 or '_ansible_verbose_always' in result._result) and '_ansible_verbose_override' not in result._result:
+                if result._task.action == 'debug' and 'changed' in result._result:
+                    del result._result['changed']
                 msg += " => %s" % (self._dump_results(result._result),)
             self._display.display(msg, color=color)