From 6b3ea4516abed26cd67f64c5f886c624d0b8fa01 Mon Sep 17 00:00:00 2001
From: Howard Hinnant <howard.hinnant@gmail.com>
Date: Sat, 26 Nov 2016 13:37:38 -0500
Subject: [PATCH] Fix bugs with formatting fractional seconds

---
 date.h | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/date.h b/date.h
index 919aa28..36091bc 100644
--- a/date.h
+++ b/date.h
@@ -3437,7 +3437,10 @@ struct make_precision<w, false>
     static CONSTDATA unsigned width = 6;
 };
 
-template <class Duration, unsigned w = width<Duration::period::den>::value>
+template <class Duration,
+          unsigned w = width<std::common_type<
+                                 Duration,
+                                 std::chrono::seconds>::type::period::den>::value>
 class decimal_format_seconds
 {
 public:
@@ -4475,7 +4478,10 @@ to_stream(std::basic_ostream<CharT, Traits>& os, const CharT* fmt,
             if (command)
             {
                 if (modified == CharT{})
-                    os << make_time(tp - floor<days>(tp));
+                {
+                    using CT = typename common_type<seconds, Duration>::type;
+                    os << time_of_day<CT>{tp - floor<days>(tp)};
+                }
                 else
                 {
                     os << CharT{'%'} << modified << *fmt;