https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117639
--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> --- (In reply to Jan Hubicka from comment #1) > Does std::log need to set errno? Yes, it's the same log function as in C. So log((unsigned)0) sets ERANGE and log ((signed)-1) sets EDOM. But I would expect the compiler to notice that neither case is possible here, and that i > 0 for every std::log(i) call here. So errno will never be set here.
