Issue #18011: Silence an unrelated noise introduced in changeset 1b5ef05d6ced.

diff --git a/Lib/base64.py b/Lib/base64.py
index f923244104e3bea996e3c6e5ef973a53ebaa173e..9c15752fe3123520ba236be27f3ad06953304707 100755 (executable)
--- a/Lib/base64.py
+++ b/Lib/base64.py
@@ -222,7 +222,7 @@ def b32decode(s, casefold=False, map01=None):
             for c in quanta:
                 acc = (acc << 5) + b32rev[c]
         except KeyError:
-            raise binascii.Error('Non-base32 digit found')
+            raise binascii.Error('Non-base32 digit found') from None
         decoded += acc.to_bytes(5, 'big')
     # Process the last, partial quanta
     if padchars: