P2590R2, Explicit lifetime management (PR106658)

Nearly all zero-copy code that deals with external I/O buffers looks something like:

  std::unique_ptr<char[]> buffer = stream->read();
  if (buffer[0] == FOO)
    processFoo(reinterpret_cast<Foo*>(buffer.get())); // undefined behavior
  else
    processBar(reinterpret_cast<Bar*>(buffer.get())); // undefined behaviour

https://en.cppreference.com/cpp/memory/start_lifetime_as

But:

> GCC can now output diagnostics in HTML form via -fdiagnostics-add-output=experimental-html

I wonder what drove the decision to remove JSON output and add HTML output?

Hopefully they fixed those issues. We all need stability and things-to-work.