what's wrong with TextureAtlas::drawNumberOfQuads(int, int)

on android, sometimes will cause these error, the crash stack is reported by bugly. i dont't know how to reproduce it.

GLThread 1985(1985)

SIGSEGV(SEGV_MAPERR) 1 #00 pc 00010620 /system/lib/libc.so (__memcpy_base+88) [armeabi-v7a] 2 #01 pc 000fd4e7 /system/vendor/lib/egl/libGLESv2_adreno.so (EsxVertexArrayObject::UpdateInternalVbos(EsxDrawDescriptor const*, unsigned int, EsxAttributeDesc const*)+1158) [armeabi-v7a] 3 #02 pc 00127ee9 /system/vendor/lib/egl/libGLESv2_adreno.so (A4xVertexArrayObject::CalcVfdRegs(EsxDrawDescriptor const*, A4xVfdRegs*, int)+932) [armeabi-v7a] 4 #03 pc 0012bf0b /system/vendor/lib/egl/libGLESv2_adreno.so (A4xContext::ValidateVfdState(EsxDrawDescriptor const*, int)+38) [armeabi-v7a] 5 #04 pc 00133e3f /system/vendor/lib/egl/libGLESv2_adreno.so (A4xContext::ValidateState(EsxDrawDescriptor const*)+1426) [armeabi-v7a] 6 #05 pc 001340dd /system/vendor/lib/egl/libGLESv2_adreno.so (A4xContext::HwValidateGfxState(EsxDrawDescriptor const*)+4) [armeabi-v7a] 7 #06 pc 000bd0c3 /system/vendor/lib/egl/libGLESv2_adreno.so (EsxContext::ValidateGfxState(EsxDrawDescriptor const*)+486) [armeabi-v7a] 8 #07 pc 000bae75 /system/vendor/lib/egl/libGLESv2_adreno.so (EsxContext::DrawElementsInstanced(EsxPrimType, unsigned int, EsxPixType, void const*, unsigned int)+284) [armeabi-v7a] 9 #08 pc 000a93fd /system/vendor/lib/egl/libGLESv2_adreno.so (EsxContext::GlDrawElements(unsigned int, int, unsigned int, void const*)+48) [armeabi-v7a] 10 #09 pc 000a0fbf /system/vendor/lib/egl/libGLESv2_adreno.so (glDrawElements+38) [armeabi-v7a] 11 #10 pc 00531ce3 /data/app/com.test.tech/lib/arm/libcocos2dlua.so (cocos2d::TextureAtlas::drawNumberOfQuads(int, int)+318) [armeabi-v7a] 12 #11 pc 004debcd /data/app/com.test.tech/lib/arm/libcocos2dlua.so (cocos2d::Label::onDraw(cocos2d::Mat4 const&, bool)+236) [armeabi-v7a] 13 #12 pc 0052eb9d /data/app/com.test.tech/lib/arm/libcocos2dlua.so (cocos2d::Renderer::visitRenderQueue(cocos2d::RenderQueue&)+252) [armeabi-v7a] 14 #13 pc 0052fb77 /data/app/com.test.tech/lib/arm/libcocos2dlua.so (cocos2d::Renderer::render()+42) [armeabi-v7a] 15 #14 pc 004f5685 /data/app/com.test.tech/lib/arm/libcocos2dlua.so (cocos2d::Scene::render(cocos2d::Renderer*)+204) [armeabi-v7a] 16 #15 pc 00517873 /data/app/com.test.tech/lib/arm/libcocos2dlua.so (cocos2d::Director::drawScene()+110) [armeabi-v7a] 17 #16 pc 0051792b /data/app/com.test.tech/lib/arm/libcocos2dlua.so (cocos2d::Director::mainLoop()+58) [armeabi-v7a] 18 #17 pc 0111538d /data/dalvik-cache/arm/data@[email protected]@[email protected] (oatdata+17908621) [armeabi]