make_value is ambiguous on macOS Mojave 10.14.4

[kgbook]

fmt 5.3.0 version on macOS Mojave 10.14.4 (18E226).

#include <fmt/printf.h>
...

class Log {
public:
template<typename... Args>
    void infof(const char *arg, const Args &... args) {
        log_handle->info(fmt::sprintf(arg, args ...));
    }
    ...

private:
    std::shared_ptr<spdlog::logger> log_handle;
}

log:

In file included from /usr/local/include/fmt/printf.h:14:
In file included from /usr/local/include/fmt/ostream.h:11:
In file included from /usr/local/include/fmt/format.h:60:
/usr/local/include/fmt/core.h:1069:10: error: call to 'make_value' is ambiguous
  return make_value<Context>(value);

detailed log:

In file included from /Users/kang/project/sample/RTSPServer/utils/log.h:6:
In file included from /usr/local/include/fmt/printf.h:14:
In file included from /usr/local/include/fmt/ostream.h:11:
In file included from /usr/local/include/fmt/format.h:60:
/usr/local/include/fmt/core.h:1069:10: error: call to 'make_value' is ambiguous
  return make_value<Context>(value);
         ^~~~~~~~~~~~~~~~~~~
/usr/local/include/fmt/core.h:1180:23: note: in instantiation of function
      template specialization 'fmt::v5::internal::make_arg<true,
      fmt::v5::basic_printf_context<std::__1::back_insert_iterator<fmt::v5::internal::basic_buffer<char>
      >, char,
      fmt::v5::printf_arg_formatter<fmt::v5::back_insert_range<fmt::v5::internal::basic_buffer<char>
      > > >, volatile char>' requested here
    : data_{internal::make_arg<IS_PACKED, Context>(args)...} {}
                      ^
/usr/local/include/fmt/printf.h:759:38: note: in instantiation of member
      function
      'fmt::v5::format_arg_store<fmt::v5::basic_printf_context<std::__1::back_insert_iterator<fmt::v5::internal::basic_buffer<char>
      >, char,
      fmt::v5::printf_arg_formatter<fmt::v5::back_insert_range<fmt::v5::internal::basic_buffer<char>
      > > >, const char *, volatile char>::format_arg_store' requested here
  format_arg_store<context, Args...> as{ args... };
                                     ^
/Users/kang/project/sample/RTSPServer/utils/log.h:47:31: note: in instantiation
      of function template specialization 'fmt::v5::sprintf<const char *, const
      char *, volatile char>' requested here
        log_handle->info(fmt::sprintf(arg, args ...));
                              ^
/Users/kang/project/sample/RTSPServer/server/rtsp_service.cpp:98:10: note: in
      instantiation of function template specialization 'Log::infof<const char
      *, volatile char>' requested here
    log->infof("%s:terminate_event_loop:%d", service_name.c_str(), termi...
         ^
/usr/local/include/fmt/core.h:679:34: note: candidate function [with C =
      fmt::v5::basic_printf_context<std::__1::back_insert_iterator<fmt::v5::internal::basic_buffer<char>
      >, char,
      fmt::v5::printf_arg_formatter<fmt::v5::back_insert_range<fmt::v5::internal::basic_buffer<char>
      > > >, Char = char]
  init<C, int, char_type>>::type make_value(Char val) { return val; }
                                 ^
/usr/local/include/fmt/core.h:746:3: note: candidate function [with C =
      fmt::v5::basic_printf_context<std::__1::back_insert_iterator<fmt::v5::internal::basic_buffer<char>
      >, char,
      fmt::v5::printf_arg_formatter<fmt::v5::back_insert_range<fmt::v5::internal::basic_buffer<char>
      > > >, T = volatile char, Char = char]
  make_value(const T &val) { return val; }
  ^
/usr/local/include/fmt/core.h:655:1: note: candidate function [with C =
      fmt::v5::basic_printf_context<std::__1::back_insert_iterator<fmt::v5::internal::basic_buffer<char>
      >, char,
      fmt::v5::printf_arg_formatter<fmt::v5::back_insert_range<fmt::v5::internal::basic_buffer<char>
      > > >]
FMT_MAKE_VALUE_SAME(int_type, int)
^
/usr/local/include/fmt/core.h:650:36: note: expanded from macro
      'FMT_MAKE_VALUE_SAME'
  FMT_CONSTEXPR init<C, Type, TAG> make_value(Type val) { return val; }
                                   ^
/usr/local/include/fmt/core.h:652:1: note: candidate function [with C =
      fmt::v5::basic_printf_context<std::__1::back_insert_iterator<fmt::v5::internal::basic_buffer<char>
      >, char,
      fmt::v5::printf_arg_formatter<fmt::v5::back_insert_range<fmt::v5::internal::basic_buffer<char>
      > > >]
FMT_MAKE_VALUE(bool_type, bool, int)
^
/usr/local/include/fmt/core.h:644:41: note: expanded from macro 'FMT_MAKE_VALUE'
  FMT_CONSTEXPR init<C, ValueType, TAG> make_value(ArgType val) { \
                                        ^
/usr/local/include/fmt/core.h:653:1: note: candidate function [with C =
      fmt::v5::basic_printf_context<std::__1::back_insert_iterator<fmt::v5::internal::basic_buffer<char>
      >, char,
      fmt::v5::printf_arg_formatter<fmt::v5::back_insert_range<fmt::v5::internal::basic_buffer<char>
      > > >]
FMT_MAKE_VALUE(int_type, short, int)
^
/usr/local/include/fmt/core.h:644:41: note: expanded from macro 'FMT_MAKE_VALUE'
  FMT_CONSTEXPR init<C, ValueType, TAG> make_value(ArgType val) { \
                                        ^
/usr/local/include/fmt/core.h:654:1: note: candidate function [with C =
      fmt::v5::basic_printf_context<std::__1::back_insert_iterator<fmt::v5::internal::basic_buffer<char>
      >, char,
      fmt::v5::printf_arg_formatter<fmt::v5::back_insert_range<fmt::v5::internal::basic_buffer<char>
      > > >]
FMT_MAKE_VALUE(uint_type, unsigned short, unsigned)
^
/usr/local/include/fmt/core.h:644:41: note: expanded from macro 'FMT_MAKE_VALUE'
  FMT_CONSTEXPR init<C, ValueType, TAG> make_value(ArgType val) { \
                                        ^
/usr/local/include/fmt/core.h:656:1: note: candidate function [with C =
      fmt::v5::basic_printf_context<std::__1::back_insert_iterator<fmt::v5::internal::basic_buffer<char>
      >, char,
      fmt::v5::printf_arg_formatter<fmt::v5::back_insert_range<fmt::v5::internal::basic_buffer<char>
      > > >]
FMT_MAKE_VALUE_SAME(uint_type, unsigned)
^
/usr/local/include/fmt/core.h:650:36: note: expanded from macro
      'FMT_MAKE_VALUE_SAME'
  FMT_CONSTEXPR init<C, Type, TAG> make_value(Type val) { return val; }
                                   ^
/usr/local/include/fmt/core.h:662:1: note: candidate function [with C =
      fmt::v5::basic_printf_context<std::__1::back_insert_iterator<fmt::v5::internal::basic_buffer<char>
      >, char,
      fmt::v5::printf_arg_formatter<fmt::v5::back_insert_range<fmt::v5::internal::basic_buffer<char>
      > > >]
FMT_MAKE_VALUE(
^
/usr/local/include/fmt/core.h:644:41: note: expanded from macro 'FMT_MAKE_VALUE'
  FMT_CONSTEXPR init<C, ValueType, TAG> make_value(ArgType val) { \
                                        ^
/usr/local/include/fmt/core.h:666:1: note: candidate function [with C =
      fmt::v5::basic_printf_context<std::__1::back_insert_iterator<fmt::v5::internal::basic_buffer<char>
      >, char,
      fmt::v5::printf_arg_formatter<fmt::v5::back_insert_range<fmt::v5::internal::basic_buffer<char>
      > > >]
FMT_MAKE_VALUE(
^
/usr/local/include/fmt/core.h:644:41: note: expanded from macro 'FMT_MAKE_VALUE'
  FMT_CONSTEXPR init<C, ValueType, TAG> make_value(ArgType val) { \
                                        ^
/usr/local/include/fmt/core.h:670:1: note: candidate function [with C =
      fmt::v5::basic_printf_context<std::__1::back_insert_iterator<fmt::v5::internal::basic_buffer<char>
      >, char,
      fmt::v5::printf_arg_formatter<fmt::v5::back_insert_range<fmt::v5::internal::basic_buffer<char>
      > > >]
FMT_MAKE_VALUE_SAME(long_long_type, long long)
^
/usr/local/include/fmt/core.h:650:36: note: expanded from macro
      'FMT_MAKE_VALUE_SAME'
  FMT_CONSTEXPR init<C, Type, TAG> make_value(Type val) { return val; }
                                   ^
/usr/local/include/fmt/core.h:671:1: note: candidate function [with C =
      fmt::v5::basic_printf_context<std::__1::back_insert_iterator<fmt::v5::internal::basic_buffer<char>
      >, char,
      fmt::v5::printf_arg_formatter<fmt::v5::back_insert_range<fmt::v5::internal::basic_buffer<char>
      > > >]
FMT_MAKE_VALUE_SAME(ulong_long_type, unsigned long long)
^
/usr/local/include/fmt/core.h:650:36: note: expanded from macro
      'FMT_MAKE_VALUE_SAME'
  FMT_CONSTEXPR init<C, Type, TAG> make_value(Type val) { return val; }
                                   ^
/usr/local/include/fmt/core.h:672:1: note: candidate function [with C =
      fmt::v5::basic_printf_context<std::__1::back_insert_iterator<fmt::v5::internal::basic_buffer<char>
      >, char,
      fmt::v5::printf_arg_formatter<fmt::v5::back_insert_range<fmt::v5::internal::basic_buffer<char>
      > > >]
FMT_MAKE_VALUE(int_type, signed char, int)
^
/usr/local/include/fmt/core.h:644:41: note: expanded from macro 'FMT_MAKE_VALUE'
  FMT_CONSTEXPR init<C, ValueType, TAG> make_value(ArgType val) { \
                                        ^
/usr/local/include/fmt/core.h:673:1: note: candidate function [with C =
      fmt::v5::basic_printf_context<std::__1::back_insert_iterator<fmt::v5::internal::basic_buffer<char>
      >, char,
      fmt::v5::printf_arg_formatter<fmt::v5::back_insert_range<fmt::v5::internal::basic_buffer<char>
      > > >]
FMT_MAKE_VALUE(uint_type, unsigned char, unsigned)
^
/usr/local/include/fmt/core.h:644:41: note: expanded from macro 'FMT_MAKE_VALUE'
  FMT_CONSTEXPR init<C, ValueType, TAG> make_value(ArgType val) { \
                                        ^
/usr/local/include/fmt/core.h:686:1: note: candidate function [with C =
      fmt::v5::basic_printf_context<std::__1::back_insert_iterator<fmt::v5::internal::basic_buffer<char>
      >, char,
      fmt::v5::printf_arg_formatter<fmt::v5::back_insert_range<fmt::v5::internal::basic_buffer<char>
      > > >]
FMT_MAKE_VALUE(double_type, float, double)
^
/usr/local/include/fmt/core.h:644:41: note: expanded from macro 'FMT_MAKE_VALUE'
  FMT_CONSTEXPR init<C, ValueType, TAG> make_value(ArgType val) { \
                                        ^
/usr/local/include/fmt/core.h:687:1: note: candidate function [with C =
      fmt::v5::basic_printf_context<std::__1::back_insert_iterator<fmt::v5::internal::basic_buffer<char>
      >, char,
      fmt::v5::printf_arg_formatter<fmt::v5::back_insert_range<fmt::v5::internal::basic_buffer<char>
      > > >]
FMT_MAKE_VALUE_SAME(double_type, double)
^
/usr/local/include/fmt/core.h:650:36: note: expanded from macro
      'FMT_MAKE_VALUE_SAME'
  FMT_CONSTEXPR init<C, Type, TAG> make_value(Type val) { return val; }
                                   ^
/usr/local/include/fmt/core.h:688:1: note: candidate function [with C =
      fmt::v5::basic_printf_context<std::__1::back_insert_iterator<fmt::v5::internal::basic_buffer<char>
      >, char,
      fmt::v5::printf_arg_formatter<fmt::v5::back_insert_range<fmt::v5::internal::basic_buffer<char>
      > > >]
FMT_MAKE_VALUE_SAME(long_double_type, long double)
^
/usr/local/include/fmt/core.h:650:36: note: expanded from macro
      'FMT_MAKE_VALUE_SAME'
  FMT_CONSTEXPR init<C, Type, TAG> make_value(Type val) { return val; }
                                   ^
1 error generated.

[vitaut]

Fixed in 5d755d0. Thanks for reporting!

[vedranmiletic]

@vitaut any plans for 5.3.1 with this fix included? This affects Clang on Linux and FreeBSD too, and I also see it on g++-7 (Debian 7.4.0-9) 7.4.0 and g++ (Debian 6.3.0-18+deb9u1) 6.3.0 20170516.

[vitaut]

The fix will be included in the next release some time after 17 June.

[vedranmiletic]

@vitaut Thanks!