Function assert_fail

extlibs/fmt/include/fmt/format-inl.h:42–45

namespace internal {

FMT_FUNC void assert_fail(const char* file, int line, const char* message) {
  print(stderr, "{}:{}: assertion failed: {}", file, line, message);
  std::abort();
}

#ifndef _MSC_VER
#  define FMT_SNPRINTF snprintf