After upgrading to 2.2.0 we are receiving server crashes.
Server in average can work 2-20 minutes before the crash. Every time the crash in a dbsyncer process.
Note also interesting point - first crash (after upgrade) was in two processes in the row: in dbsyncer and in main process.
Next crashes only in the dbsyncer.
See attached log (the crash repeated several times) and objdump.