error: reference to ‘char_traits’ is ambiguous

[375gnu]

Hello!

This simple program doesn't complie with the current master (397e8dd):

#include <fmt/printf.h>
#include <string>
using namespace std;
int main()
{
char_traits<char>::char_type c;
return 0;

The output is

test.cc: In function ‘int main()’:
test.cc:8:1: error: reference to ‘char_traits’ is ambiguous
 char_traits<char>::char_type c;
 ^~~~~~~~~~~
In file included from /usr/include/c++/8/algorithm:61,
                 from include/fmt/printf.h:11,
                 from test.cc:1:
/usr/include/c++/8/bits/stl_algobase.h:392:12: note: candidates are: ‘template<class _CharT> struct std::char_traits’
     struct char_traits;
            ^~~~~~~~~~~
In file included from include/fmt/ostream.h:12,
                 from include/fmt/printf.h:14,
                 from test.cc:1:
include/fmt/format.h:555:33: note:                 ‘template<class Char> struct fmt::v5::internal::char_traits’
 template <typename Char> struct char_traits;
                                 ^~~~~~~~~~~
test.cc:6:13: error: expected primary-expression before ‘char’
 char_traits<char>::char_type c;

My compiler is:

g++ --version
g++ (Debian 8.3.0-2) 8.3.0

The same with clang+++ 7.

[vitaut]

Fixed in dc94010. Thanks for reporting!