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#include <utility>
 
struct Base
{
	Base(int myArg) {}
};
 
struct Derived : public Base
{
	template <typename... Args>
	Derived(Args&&... args, int myArg)
	:
		Base(std::forward<Args>(args)...)
	{
	}
};
 
int main() {
	Derived d(1, 1);
 
	// your code goes here
	return 0;
}

prog.cpp: In function 'int main()':
prog.cpp:19:16: error: no matching function for call to 'Derived::Derived(int, int)'
  Derived d(1, 1);
                ^
prog.cpp:19:16: note: candidates are:
prog.cpp:11:2: note: template<class ... Args> Derived::Derived(Args&& ..., int)
  Derived(Args&&... args, int myArg)
  ^
prog.cpp:11:2: note:   template argument deduction/substitution failed:
prog.cpp:19:16: note:   candidate expects 1 argument, 2 provided
  Derived d(1, 1);
                ^
prog.cpp:8:8: note: constexpr Derived::Derived(const Derived&)
 struct Derived : public Base
        ^
prog.cpp:8:8: note:   candidate expects 1 argument, 2 provided
prog.cpp:8:8: note: constexpr Derived::Derived(Derived&&)
prog.cpp:8:8: note:   candidate expects 1 argument, 2 provided

Standard output is empty