[Bug c++/58063] default arguments evaluated twice per call

[paolo.carlini at oracle dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58063

--- Comment #4 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Sorry, I didn't study it in sufficient detail. Anyway, no mysteries, this is
free software: libstdc++-v3/src/c++98/ios_init.cc etc.