According to Florian Weimer [1] I filed a bug against glibc: https://sourceware.org/bugzilla/show_bug.cgi?id=19861
[1] https://sourceware.org/ml/libc-help/2016-03/msg00012.html BR G.Baroncelli -- gpg @keyserver.linux.it: Goffredo Baroncelli <kreijackATinwind.it> Key fingerprint BBF5 1610 0B64 DAC6 5F7D 17B2 0EDA 9B37 8B82 E0B5