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#include <utility>
 
struct Test {
  Test() : a(1.0) {}
 
private:
  double a;
  Test(Test&&) = default;
  Test(const Test&) = delete;
  void operator=(Test&&) = delete;
};
 
int main (int argc, char** argv) {
  std::pair<Test, double> result(Test(), 0.0);
}

/usr/include/c++/5/bits/stl_pair.h: In instantiation of 'constexpr std::pair<_T1, _T2>::pair(const _T1&, _U2&&) [with _U2 = double; <template-parameter-2-2> = void; _T1 = Test; _T2 = double]':
prog.cpp:15:45:   required from here
prog.cpp:10:3: error: 'Test::Test(const Test&)' is private
   Test(const Test&) = delete;
   ^
In file included from /usr/include/c++/5/utility:70:0,
                 from prog.cpp:2:
/usr/include/c++/5/bits/stl_pair.h:139:45: error: within this context
  : first(__x), second(std::forward<_U2>(__y)) { }
                                             ^
/usr/include/c++/5/bits/stl_pair.h:139:45: error: use of deleted function 'Test::Test(const Test&)'
prog.cpp:10:3: note: declared here
   Test(const Test&) = delete;
   ^

Standard output is empty