After running the following code

char buffer[32];
const fmt::format_to_n_result<char*> result = fmt::format_to_n(buffer, sizeof(buffer), "{}", 'A');

result.size is 0 when it should be 1.

Also, when changing the format string from "{}" to "{} " (adding a single space), result.size is 1 when it should be 2, and the contents of buffer is " " (a single space) following garbage as it's not null-terminated.

The {fmt} code running is from commit a977577 and built with Visual Studio 2017 15.9.5 v141 toolset.