[3.7] bpo-36492: Fix passing special keyword arguments to some functions. (GH-12637) (GH-12645)

The following arguments can be passed as keyword arguments for passing
to other function if the corresponding required argument is passed as
positional:

- "func" in functools.partialmethod(), weakref.finalize(),
  profile.Profile.runcall(), cProfile.Profile.runcall(),
  bdb.Bdb.runcall(), trace.Trace.runfunc() and
  curses.wrapper().
- "function" in unittest.addModuleCleanup() and
  unittest.TestCase.addCleanup().
- "fn" in the submit() method of concurrent.futures.ThreadPoolExecutor
  and concurrent.futures.ProcessPoolExecutor.
- "callback" in contextlib.ExitStack.callback(),
  contextlib.AsyncExitStack.callback() and
  contextlib.AsyncExitStack.push_async_callback().
- "c" and "typeid" in multiprocessing.managers.Server.create().
- "obj" in weakref.finalize().

(cherry picked from commit 42a139ed88c487f325a241c6ee8b308b3c045975)

1 files changed, 10 insertions, 0 deletions

diff --git a/Lib/test/test_contextlib.py b/Lib/test/test_contextlib.py
index 2a44404..30c2e27 100644
--- a/Lib/test/test_contextlib.py
+++ b/Lib/test/test_contextlib.py
@@ -575,6 +575,7 @@ class TestBaseExitStack:
             ((), dict(example=1)),
             ((1,), dict(example=1)),
             ((1,2), dict(example=1)),
+            ((1,2), dict(self=3, callback=4)),
         ]
         result = []
         def _exit(*args, **kwds):
@@ -597,6 +598,15 @@ class TestBaseExitStack:
                 self.assertIsNone(wrapper[1].__doc__, _exit.__doc__)
         self.assertEqual(result, expected)
 
+        result = []
+        with self.exit_stack() as stack:
+            with self.assertRaises(TypeError):
+                stack.callback(arg=1)
+            with self.assertRaises(TypeError):
+                self.exit_stack.callback(arg=2)
+            stack.callback(callback=_exit, arg=3)
+        self.assertEqual(result, [((), {'arg': 3})])
+
     def test_push(self):
         exc_raised = ZeroDivisionError
         def _expect_exc(exc_type, exc, exc_tb):