cocos2d/cocos2d-x — pull request #5631 by lostplesed (2014-03-08 04:53:48+00:00)
Title: Update CCFreeTypeFont.cpp

in some case when you pass a " " string to a cclabelttf it will not calculate the bbox, and later when you calculate the m_textWidth, the result can't predict, so you need init the bbox. when you getBitmap will be new a very large memory. it just crash.