The exception to set multiline string in CCLabelTTF in Chinese.

I have a critical bugs:
I create a CCLabelTTF sprite, and set the string in CCLabelTTF.
If the multiline string is set in CCLabelTTF, setString function will exception!

I need your help!

Attach:
The Log is as follow:
cocos2d: removeChildByTag: child not found!

The backtrace:

/system/lib/libc.so (__libc_android_abort)
/system/lib/libc.so (dlfree)
/system/lib/libc.so (free)
/data/data/com.test.cclabelttf/lib/libgame.so (_ZN7cocos2d7CCImageD1Ev)
/data/data/com.test.cclabelttf/lib/libgame.so (_ZN7cocos2d7CCImageD0Ev)
/data/data/com.test.cclabelttf/lib/libgame.so (_ZN7cocos2d8CCObject7releaseEv)
/data/data/com.test.cclabelttf/lib/libgame.so (_ZN7cocos2d11CCTexture2D14initWithStringEPKcS2_fRKNS_6CCSizeENS_15CCTextAlignmentENS_23CCVerticalTextAlignmentE)
/data/data/com.test.cclabelttf/lib/libgame.so (_ZN7cocos2d10CCLabelTTF13updateTextureEv)
/data/data/com.test.cclabelttf/lib/libgame.so (_ZN7cocos2d10CCLabelTTF9setStringEPKc)
/data/data/com.test.cclabelttf/lib/libgame.so (_ZN10GamePvpMsg15updateMsgDetailEv)
/data/data/com.test.cclabelttf/lib/libgame.so (_ZN10GamePvpMsg16tableCellTouchedEPN7cocos2d9extension11CCTableViewEPNS1_15CCTableViewCellE)
/data/data/com.test.cclabelttf/lib/libgame.so (_ZN7cocos2d9extension11CCTableView12ccTouchEndedEPNS_7CCTouchEPNS_7CCEventE)
/data/data/com.test.cclabelttf/lib/libgame.so (_ZN7cocos2d17CCTouchDispatcher7touchesEPNS_5CCSetEPNS_7CCEventEj)
/data/data/com.test.cclabelttf/lib/libgame.so (_ZN7cocos2d17CCTouchDispatcher12touchesEndedEPNS_5CCSetEPNS_7CCEventE)
/data/data/com.test.cclabelttf/lib/libgame.so (ZN7cocos2d17CCEGLViewProtocol16handleTouchesEndEiPiPfS2)
/data/data/com.test.cclabelttf/lib/libgame.so (Java_org_cocos2dx_lib_Cocos2dxRenderer_nativeTouchesEnd)
/system/lib/libdvm.so