Segmentation fault (core dumped)
I've got this error this morning

```
[root@localhost bin]# php listen.php
[2016-07-25 13:22:10] Sock-In.INFO: onOpen {"#Client count":1,"id":66,"ip":"1.55.239.112"} []
[2016-07-25 13:22:10] SockOut.INFO: send {"Total client":1,"to":66,"len":64,"msg":"[0,\"2358855805795b012ca02a420096606\",1,\"RatchetWebsocket\\/0.3.5\"]..."} []
[2016-07-25 13:22:10] SockOut.INFO: send {"Total client":1,"to":66,"len":52,"msg":"[8,\"ctrl:rooms\",[\"mien_bac\",\"Mi\\u1ec1n B\\u1eafc\",1]]..."} []
[2016-07-25 13:22:10] SockOut.INFO: send {"Total client":1,"to":66,"len":51,"msg":"[8,\"ctrl:rooms\",[\"mien_trung\",\"Mi\\u1ec1n Trung\",1]]..."} []
[2016-07-25 13:22:10] SockOut.INFO: send {"Total client":1,"to":66,"len":47,"msg":"[8,\"ctrl:rooms\",[\"mien_nam\",\"Mi\\u1ec1n Nam\",1]]..."} []
Segmentation fault (core dumped)
```

Please help.
