fix traceback if no file in include_task

changelogs/fragments/54044-fix-include_task-no-file-traceback.yml

@@ -0,0 +1,2 @@
+bugfixes:
+  - include_task - Fixed an unexpected exception if no file was given to include.

lib/ansible/playbook/task_include.py

@@ -69,7 +69,7 @@ def load(data, block=None, role=None, task_include=None, variable_manager=None,
             raise AnsibleParserError('Invalid options for %s: %s' % (task.action, ','.join(list(bad_opts))), obj=data)
 
         if not task.args.get('_raw_params'):
-            task.args['_raw_params'] = task.args.pop('file')
+            task.args['_raw_params'] = task.args.pop('file', None)
 
         apply_attrs = task.args.get('apply', {})
         if apply_attrs and task.action != 'include_tasks':

test/integration/targets/include_import/tasks/test_include_tasks.yml

@@ -42,3 +42,13 @@
 
     - name: include_tasks + action
       action: include_tasks tasks1.yml
+
+    - name: test fail as expected without file
+      include_tasks:
+      ignore_errors: yes
+      register: res
+
+    - name: verify fail as expected without file
+      assert:
+        that:
+          - res.msg == 'No include file was specified to the include'