MDEV-6924 : Server crashed on CREATE TABLE ... SELECT

Do not allow server to start if binlog_format is set
to a format other than ROW. Also restrict the change
of GLOBAL/SESSION binlog_format value at runtime.

sql/sql_class.cc

@@ -5885,6 +5885,16 @@ int THD::binlog_query(THD::enum_binlog_query_type qtype, char const *query_arg,
       The MYSQL_LOG::write() function will set the STMT_END_F flag and
       flush the pending rows event if necessary.
     */
+#ifdef WITH_WSREP
+    /*
+      Even though wsrep only supports ROW binary log format, a user can set
+      binlog format to STATEMENT (wsrep_forced_binlog_format). In which case
+      the control might reach here even when binary logging (--log-bin) is
+      not enabled. This is possible because wsrep patch partially enables
+      binary logging by setting wsrep_emulate_binlog.
+    */
+    if (mysql_bin_log.is_open())
+#endif /* WITH_WSREP */
     {
       Query_log_event qinfo(this, query_arg, query_len, is_trans, direct,
                             suppress_use, errcode);