https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115668
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Oops, the diff above is against an incomplete fix I already had in my git
index, this is the proper fix:
--- a/libstdc++-v3/include/bits/chrono_io.h
+++ b/libstdc++-v3/include/bits/chrono_io.h
@@ -1696,7 +1696,10 @@ namespace __format
format(const chrono::duration<_Rep, _Period>& __d,
basic_format_context<_Out, _CharT>& __fc) const
{
- return _M_f._M_format(chrono::abs(__d), __fc, __d < __d.zero());
+ if (__d < __d.zero())
+ return _M_f._M_format(-__d, __fc, true);
+ else
+ return _M_f._M_format(__d, __fc, false);
}
private:
