https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114279
Jonathan Wakely <redi at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Target Milestone|--- |13.3 Assignee|unassigned at gcc dot gnu.org |redi at gcc dot gnu.org Ever confirmed|0 |1 Last reconfirmed| |2024-03-08 Status|UNCONFIRMED |ASSIGNED --- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> --- Fix: --- a/libstdc++-v3/include/bits/chrono_io.h +++ b/libstdc++-v3/include/bits/chrono_io.h @@ -2854,9 +2854,19 @@ namespace __detail basic_string<_CharT, _Traits, _Alloc>* __abbrev = nullptr, minutes* __offset = nullptr) { - sys_time<_Duration> __st; - if (chrono::from_stream(__is, __fmt, __st, __abbrev, __offset)) - __tp = chrono::time_point_cast<_Duration>(utc_clock::from_sys(__st)); + minutes __off{}; + if (!__offset) + __offset = &__off; + using __format::_ChronoParts; + auto __need = _ChronoParts::_Year | _ChronoParts::_Month + | _ChronoParts::_Day | _ChronoParts::_TimeOfDay; + __detail::_Parser_t<_Duration> __p(__need); + if (__p(__is, __fmt, __abbrev, __offset)) + { + auto __ut = utc_clock::from_sys(__p._M_sys_days) + __p._M_time + - *__offset; + __tp = chrono::time_point_cast<_Duration>(__ut); + } return __is; } But we also need a change to the other from_stream overloads that are defined in terms of utc_time, so that they don't allow 60s.