There is no information about returned value of many functions from the fontconfig, while it is not really clear what should they return. The list of the functions is as follows: * FcFontSetAdd * FcObjectSetAdd * FcNameRegisterObjectTypes * FcNameUnregisterObjectTypes * FcNameRegisterConstants * FcNameUnregisterConstants * FcConfigParseAndLoad * FcConfigSubstitute * FcConfigSubstituteWithPat * FcConfigAppFontAddDir * FcConfigAppFontAddFile * FcConfigSetRescanInverval * FcInitReinitialize * FcInitBringUptoDate * FcAtomicReplaceOrig * FcFileScan * FcDirScan * FcDirSave
The detailed bug description can be found at: http://linuxtesting.org/results/report?num=S0584
Thanks, these are all fixed in fab44f3cb63dc8bd1285dcbd6ad4f1f468f91daf
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