hopefully second ldconfig would avoid such serious errors:
http://lists.pld-linux.org/mailman/pipermail/pld-devel-en/2016-March/024783.html
Summary(uk.UTF-8): ncurses - нова бібліотека керування терміналами
Name: ncurses
Version: %{basever}.%{patchlevel}
-Release: 1
+Release: 2
License: distributable
Group: Libraries
Source0: ftp://dickey.his.com/ncurses/%{name}-%{basever}.tar.gz
%post ext -p /sbin/ldconfig
%postun ext -p /sbin/ldconfig
+%triggerpostun -p /sbin/ldconfig -- %{name} < 6.0.20151128-2
+
%files
%defattr(644,root,root,755)
%doc ANNOUNCE README