Created attachment 131803 [details] [review] Commit (as output by 'git format-patch') As written at: https://lists.freedesktop.org/archives/fontconfig/2017-June/005942.html FcLangSetIndex() indicates "not found" with a non-negative return value. Return value 0 doesn't imply "not found", it rather means "language found at index 0 in fcLangCharSets". See attached patch for the precise location.
Thanks. merged in git.
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