Fix lookup of parent attribute when parent doesn't have the attr

Fixes #14100

lib/ansible/playbook/block.py

@@ -298,18 +298,18 @@ class Block(Base, Become, Conditional, Taggable):
                     value = self._extend_value(value, parent_value)
                 else:
                     value = parent_value
-            if self._role and (value is None or extend):
-                parent_value = getattr(self._role, attr)
+            if self._role and (value is None or extend) and hasattr(self._role, attr):
+                parent_value = getattr(self._role, attr, None)
                 if extend:
                     value = self._extend_value(value, parent_value)
                 else:
                     value = parent_value
 
-                if len(self._dep_chain) and (not value or extend):
+                if len(self._dep_chain) and (value is None or extend):
                     reverse_dep_chain = self._dep_chain[:]
                     reverse_dep_chain.reverse()
                     for dep in reverse_dep_chain:
-                        dep_value = getattr(dep, attr)
+                        dep_value = getattr(dep, attr, None)
                         if extend:
                             value = self._extend_value(value, dep_value)
                         else:
@@ -317,14 +317,13 @@ class Block(Base, Become, Conditional, Taggable):
 
                         if value is not None and not extend:
                             break
-
-            if self._play and (value is None or extend):
-                parent_value = getattr(self._play, attr)
+            if self._play and (value is None or extend) and hasattr(self._play, attr):
+                parent_value = getattr(self._play, attr, None)
                 if extend:
                     value = self._extend_value(value, parent_value)
                 else:
                     value = parent_value
-        except KeyError:
+        except KeyError as e:
             pass
 
         return value
@@ -344,11 +343,7 @@ class Block(Base, Become, Conditional, Taggable):
         '''
         Override for the 'tags' getattr fetcher, used from Base.
         '''
-        any_errors_fatal = self._attributes['any_errors_fatal']
-        if hasattr(self, '_get_parent_attribute'):
-            if self._get_parent_attribute('any_errors_fatal'):
-                any_errors_fatal = True
-        return any_errors_fatal
+        return self._get_parent_attribute('any_errors_fatal')
 
     def filter_tagged_tasks(self, play_context, all_vars):
         '''

lib/ansible/playbook/task.py

@@ -419,9 +419,5 @@ class Task(Base, Conditional, Taggable, Become):
         '''
         Override for the 'tags' getattr fetcher, used from Base.
         '''
-        any_errors_fatal = self._attributes['any_errors_fatal']
-        if hasattr(self, '_get_parent_attribute'):
-            if self._get_parent_attribute('any_errors_fatal'):
-                any_errors_fatal = True
-        return any_errors_fatal
+        return self._get_parent_attribute('any_errors_fatal')