Issue #22995: Default implementation of __reduce__ and __reduce_ex__ now

rejects builtin types with not defined __new__.
Added tests for non-pickleable types.

Lib/test/test_coroutines.py

@@ -1,5 +1,7 @@
 import contextlib
+import copy
 import inspect
+import pickle
 import sys
 import types
 import unittest
@@ -1318,6 +1320,34 @@ class CoroutineTest(unittest.TestCase):
             run_async(foo())
         self.assertEqual(CNT, 0)
 
+    def test_copy(self):
+        async def func(): pass
+        coro = func()
+        with self.assertRaises(TypeError):
+            copy.copy(coro)
+
+        aw = coro.__await__()
+        try:
+            with self.assertRaises(TypeError):
+                copy.copy(aw)
+        finally:
+            aw.close()
+
+    def test_pickle(self):
+        async def func(): pass
+        coro = func()
+        for proto in range(pickle.HIGHEST_PROTOCOL + 1):
+            with self.assertRaises((TypeError, pickle.PicklingError)):
+                pickle.dumps(coro, proto)
+
+        aw = coro.__await__()
+        try:
+            for proto in range(pickle.HIGHEST_PROTOCOL + 1):
+                with self.assertRaises((TypeError, pickle.PicklingError)):
+                    pickle.dumps(aw, proto)
+        finally:
+            aw.close()
+
 
 class CoroAsyncIOCompatTest(unittest.TestCase):