[Bug libstdc++/58104] std::call_once appears to fail on standard code

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58104

--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
"Failed to execute" and "segmentation fault" are not the same thing, it would
help if you actually say what the problem is!