https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65693
--- Comment #1 from Gianfranco <costamagnagianfranco at yahoo dot it> --- Created attachment 35252 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=35252&action=edit log with -Wall -Wextra -fno-strict-aliasing -fwrapv