伤害回调错误代码:nil连接字符串 0x83c07ff

error: attempt to concat local `bb' (a nil value)
stack traceback:
   1:  function `OnDamages_NN' at line 12926 [string "?"]
error: attempt to concat a nil value
./ServerNew() [0x80b8261]
./ServerNew() [0x8188c68]
[0xf77e4400]
./ServerNew() [0x840d252]
./ServerNew() [0x840f314]
./ServerNew() [0x8409b14]
./ServerNew() [0x840f03f]
./ServerNew() [0x8409b14]
./ServerNew() [0x8409d5e]
./ServerNew() [0x8409f38]
./ServerNew() [0x840a193]
/home/tlbb/Server/xw784055837.so(+0xbf133) [0xf6085133]
./ServerNew() [0x83c07ff]
./ServerNew() [0x83de391]
./ServerNew() [0x83dc91b]
./ServerNew() [0x83dedd7]
./ServerNew() [0x83def8f]
./ServerNew() [0x83df036]
./ServerNew() [0x83c8990]
./ServerNew() [0x83c8bb0]
./ServerNew() [0x83f0643]
./ServerNew() [0x80e09a8]
./ServerNew() [0x80eceb8]
./ServerNew() [0x837d22b]
./ServerNew() [0x83639ff]
./ServerNew() [0x83676dc]
./ServerNew() [0x837d09e]
./ServerNew() [0x80e324c]
./ServerNew() [0x8112362]
./ServerNew() [0x80dac23]
./ServerNew() [0x83b2bc9]
./ServerNew() [0x83b371b]
./ServerNew() [0x83bbccc]
./ServerNew() [0x83ff70f]
/lib/libpthread.so.0(+0x6bbc) [0xf5f9bbbc]
/lib/libc.so.6(clone+0x5e) [0xf5d7e27e]
QUIT: QuitThread=0, TotalThread=71 (-905983168)(T0=2024-7-2_22:1:5 T1=1151.1570)

例如：
PushDebugMessage(sceneId,selfId,aa..bb..cc)