https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91486
--- Comment #3 from John Salmon <john.salmon at deshaw dot com> --- I grep'ed the latest devel source tree (git sha: afadff66) for occurrences of now\(\). The same bug appears several times in include/experimental/io_context and include/experimental/timer. The underlying problem is that operator+(time_point, duration) has well-defined but surprising and error-prone semantics when duration's Rep is float. Maybe it would be better to define a less error-prone helper function, e.g., template<class Clk, class Dur, class Rep, class Period> time_point<Clk, Dur> __timepoint_plus_duration(const time_point<Clk, Dur>&, duration<Rep, Period>&); and to use it consistently whenever adding a time_point to a duration?
