sync_client segfaulting

[Martin Pracht]

Hello,

the sync_client process on our server stops with following lines
in the log:

Dec  3 16:29:17 mail6238 kernel: [16759942.438118] sync_client[22783]:
segfault at 10 ip 0000000000408b28 sp 00007fff17cb0450 error 4 in
sync_client[400000+13f000]

Jan  7 09:17:57 mail6238 kernel: [957482.523035] sync_client[8217]: 
segfault at 10 ip 0000000000408b28 sp 00007fff7ece1380 error 4 in 
sync_client[400000+13f000]

has anybody seen this error?
we have Cyrus IMAP 2.4.13 running on debian.

Regards

Martin