Battle Ground botton - Crash Mapserver

[code=auto:0] Program received signal SIGSEGV, Segmentation fault. 0x00000038f6d2b685 in __strcasecmp_l_sse42 () from /lib64/libc.so.6 (gdb) bt full #0 0x00000038f6d2b685 in __strcasecmp_l_sse42 () from /lib64/libc.so.6 No symbol table info available. #1 0x0000000000486e0a in bg_name2arena (name=0x7ffff211b190 "KVM (Level 80 and up)") at battleground.c:462 i = <value optimized out> #2 0x00000000004b2793 in clif_parse_bgqueue_register (fd=<value optimized out>, sd=0x1fef1b0) at clif.c:17753 p = <value optimized out> arena = 0x0 #3 0x00000000004c7e5f in clif_parse (fd=12) at clif.c:18330 parse_cmd_func = <value optimized out> cmd = <value optimized out> packet_len = 28 sd = 0x1fef1b0 pnum = <value optimized out> #4 0x000000000062ad0e in do_sockets (next=<value optimized out>) at socket.c:872 rfd = {__fds_bits = {4096, 0 <repeats 15 times>}} timeout = {tv_sec = 0, tv_usec = 54269} ret = 0 i = <value optimized out> #5 0x00000000006272b9 in main (argc=<value optimized out>, argv=<value optimized out>) at core.c:362 next = <value optimized out> [/code]
[b]When we click button "Battle> KVM> Individual" on client.[/b]
[b]Crash mapserver.[/b]