I’m learning variadic templates. The following program:

#include <iostream>

template <typename ...T>
void f (T... t)
{ std::cout << sizeof...(t); }

int main()
{
  f(1,2,3);
}

prints 3 and exits cleanly when compiled with GCC but gives warnings about stack frame size exceeding limit and crashes with clang. I’m using Wandbox to experiment.

What’s going on here?