gh-160761: Fix TypeError when pickling directly instantiated urllib.parse result objects

Lib/test/test_urlparse.py

@@ -1344,6 +1344,11 @@ def check(result):
             check(func(burl))
             check(func(burl, missing_as_none=True))
 
+        for cls in (urllib.parse.DefragResult, urllib.parse.SplitResult, urllib.parse.ParseResult):
+            check(cls(*[''] * len(cls._fields)))
+        for cls in (urllib.parse.DefragResultBytes, urllib.parse.SplitResultBytes, urllib.parse.ParseResultBytes):
+            check(cls(*[b''] * len(cls._fields)))
+
     def test_result_compat_unpickling(self):
         def check(result, pickles):
             for pickled in pickles:

Lib/urllib/parse.py

@@ -307,6 +307,8 @@ def __deepcopy__(self, memo):
 
     def __getstate__(self):
         state = super().__getstate__()
+        if state is None:
+            return None
         try:
             if state[1]['_keep_empty'] == _MISSING_AS_NONE_DEFAULT:
                 del state[1]['_keep_empty']

Misc/NEWS.d/next/Library/2026-10-27-20-11-00.gh-issue-160761.aB3dEf.rst

@@ -0,0 +1 @@
+Fix :exc:`TypeError` when pickling directly instantiated :mod:`urllib.parse` result objects.