[3.9] gh-92049: Forbid pickling constants re._constants.SUCCESS etc (G…

…H-92070) (GH-92073) (GH-92102) Previously, pickling did not fail, but the result could not be unpickled. (cherry picked from commit 6d0d547) (cherry picked from commit e8ff3c9)
python · May 1, 2022 · 54f06ae · 54f06ae
1 parent fcbff77
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diff --git a/Lib/sre_constants.py b/Lib/sre_constants.py
@@ -62,6 +62,8 @@ def __new__(cls, value, name):
     def __repr__(self):
         return self.name
 
+    __reduce__ = None
+
 MAXREPEAT = _NamedIntConstant(MAXREPEAT, 'MAXREPEAT')
 
 def _makecodes(names):

diff --git a/Misc/NEWS.d/next/Library/2022-04-30-10-53-10.gh-issue-92049.5SEKoh.rst b/Misc/NEWS.d/next/Library/2022-04-30-10-53-10.gh-issue-92049.5SEKoh.rst
@@ -0,0 +1,2 @@
+Forbid pickling constants ``re._constants.SUCCESS`` etc. Previously,
+pickling did not fail, but the result could not be unpickled.