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-rw-r--r--Mailman/Queue/Switchboard.py4
1 files changed, 3 insertions, 1 deletions
diff --git a/Mailman/Queue/Switchboard.py b/Mailman/Queue/Switchboard.py
index 43d121f6f..fabb1d099 100644
--- a/Mailman/Queue/Switchboard.py
+++ b/Mailman/Queue/Switchboard.py
@@ -94,7 +94,9 @@ class Switchboard:
else:
protocol = 0
msgsave = cPickle.dumps(str(_msg), protocol)
- hashfood = msgsave + str(listname) + `now`
+ # listname is unicode but the input to the hash function must be an
+ # 8-bit string (eventually, a bytes object).
+ hashfood = msgsave + listname.encode('utf-8') + `now`
# Encode the current time into the file name for FIFO sorting in
# files(). The file name consists of two parts separated by a `+':
# the received time for this message (i.e. when it first showed up on