1. There is no name of the second parameter in the line
      "FcBool FcConfigAppFontAddDir(FcConfig *config, const char *);"
      of the documentation of the function FcConfigAppFontAddDir.
   2. There should be "must" instead of "nust" in the line:
      "src nust be at least len bytes long."
      of the documentation of the function FcUtf8ToUcs4.

The detailed bug description can be found at: 

http://linuxtesting.org/results/report?num=S0587