add all group vars back to implicit localhost

fixes #31857
reverts #31425

lib/ansible/inventory/data.py

@@ -79,6 +79,9 @@ class InventoryData(object):
         else:
             new_host = Host(pattern)
 
+            # use 'all' vars but not part of all group
+            new_host.vars = self.groups['all'].get_vars()
+
             new_host.address = "127.0.0.1"
             new_host.implicit = True
 

lib/ansible/vars/manager.py

@@ -334,9 +334,8 @@ class VariableManager:
                     data[group] = combine_vars(data[group], _plugins_play(group))
                 return data
 
-            # Merge groups as per precedence config, if not implicit localhost
+            # Merge groups as per precedence config
             # only allow to call the functions we want exposed
-            if not host.implicit:
             for entry in C.VARIABLE_PRECEDENCE:
                 if entry in self._ALLOWED:
                     display.debug('Calling %s to load vars for %s' % (entry, host.name))