Multiple Crashlogs that look similar are available. No real load on proxy.
It seems this is similar to ZBX-4726 from Version 1.8 in 2012
36453:20140122:152706.117 Received configuration data from server. Datalen 57230
36453:20140122:152706.119 [Z3005] query failed: [2006] MySQL server has gone away [begin;]
36456:20140122:152707.413 Got signal [signal:11(SIGSEGV),reason:1,refaddr:0x3c]. Crashing ...
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36451:20140122:152707.432 One child process died (PID:36456,exitcode/signal:11). Exiting ...
36451:20140122:152709.434 syncing history data...
36451:20140122:152709.436 syncing history data done
36451:20140122:152709.436 Zabbix Proxy stopped. Zabbix 2.2.1 (revision 40808).