commit a07da09ad5bd7d234ccd084a3a0933c290d1b592
author Raymond Hettinger <rhettinger@users.noreply.github.com> Thu Apr 22 08:34:57 2021 -0700
committer GitHub <noreply@github.com> Thu Apr 22 08:34:57 2021 -0700
tree 8c1ab67575527bd5c0c9452a74458ad5a29a1d08
parent accea7dc2bd30a6e8e1b0334acfca9585cbd7f8a

bpo-43475:  Fix worst case collision behavior for NaN instances (GH-25493)

Lib/_pydecimal.py

diff --git a/Lib/_pydecimal.py b/Lib/_pydecimal.py
index ab989e5..ff23322 100644
--- a/Lib/_pydecimal.py
+++ b/Lib/_pydecimal.py
@@ -951,7 +951,7 @@ def __hash__(self):
             if self.is_snan():
                 raise TypeError('Cannot hash a signaling NaN value.')
             elif self.is_nan():
-                return _PyHASH_NAN
+                return super().__hash__()
             else:
                 if self._sign:
                     return -_PyHASH_INF