The UT library is messing up the std::ofstream output

[rianquinn]

Expected Behavior

When I execute:

std::string msg = "The answer is: 42\n";
if (auto strm = std::ofstream("test.txt")) {
    strm << msg;
}

I would expect the following:

The answer is: 42

Actual Behavior

I actually get:

{T, h, e,  , a, n, s, w, e, r,  , i, s, :,  , 4, 2, }

If I comment out the unit test header, the above code works as expected.

Steps to Reproduce the Problem

1. Run the example above

Specifications

• Version: master
• Platform: Fedora 31
• Subsystem: ???

[rianquinn]

It's coming from this:

namespace operators {
template <class TOs, class T,
          type_traits::requires_t<type_traits::is_container_v<T>> = 0>
constexpr auto& operator<<(TOs& os, const T& t) {
  os << '{';
  auto first = true;
  for (const auto& arg : t) {
    os << (first ? "" : ", ") << arg;
    first = false;
  }
  os << '}';
  return os;
}
}  // namespace operators

Based on how this is written, I think this would end up being an issue for any container type. This is likely not a great way to do this.