In file included from test.cc:1:
In file included from /usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/vector:64:
In file included from /usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/bits/allocator.h:46:
In file included from /usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/x86_64-linux-gnu/c++/10/bits/c++allocator.h:33:
/usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/ext/new_allocator.h:150:23: error: no matching constructor for initialization of 'Foo'
        { ::new((void *)__p) _Up(std::forward<_Args>(__args)...); }
                             ^
/usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/bits/alloc_traits.h:512:8: note: in instantiation of function template specialization '__gnu_cxx::new_allocator<Foo>::construct<Foo>' requested here
          __a.construct(__p, std::forward<_Args>(__args)...);
              ^
/usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/bits/vector.tcc:115:21: note: in instantiation of function template specialization 'std::allocator_traits<std::allocator<Foo>>::construct<Foo>' requested here
            _Alloc_traits::construct(this->_M_impl, this->_M_impl._M_finish,
                           ^
test.cc:10:7: note: in instantiation of function template specialization 'std::vector<Foo, std::allocator<Foo>>::emplace_back<>' requested here
  vec.emplace_back();
      ^
test.cc:5:3: note: candidate constructor not viable: requires 1 argument, but 0 were provided
  Foo(Foo&) = delete;
  ^
In file included from test.cc:1:
In file included from /usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/vector:66:
/usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/bits/stl_uninitialized.h:137:7: error: static_assert failed due to requirement 'is_constructible<Foo, Foo &&>::value' "result type must be constructible from value type of input range"
      static_assert(is_constructible<_ValueType2, decltype(*__first)>::value,
      ^             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/bits/stl_uninitialized.h:325:19: note: in instantiation of function template specialization 'std::uninitialized_copy<std::move_iterator<Foo *>, Foo *>' requested here
    { return std::uninitialized_copy(__first, __last, __result); }
                  ^
/usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/bits/stl_uninitialized.h:346:19: note: in instantiation of function template specialization 'std::__uninitialized_copy_a<std::move_iterator<Foo *>, Foo *, Foo>' requested here
      return std::__uninitialized_copy_a
                  ^
/usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/bits/vector.tcc:473:10: note: in instantiation of function template specialization 'std::__uninitialized_move_if_noexcept_a<Foo *, Foo *, std::allocator<Foo>>' requested here
                = std::__uninitialized_move_if_noexcept_a
                       ^
/usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/bits/vector.tcc:121:4: note: in instantiation of function template specialization 'std::vector<Foo, std::allocator<Foo>>::_M_realloc_insert<>' requested here
          _M_realloc_insert(end(), std::forward<_Args>(__args)...);
          ^
test.cc:10:7: note: in instantiation of function template specialization 'std::vector<Foo, std::allocator<Foo>>::emplace_back<>' requested here
  vec.emplace_back();
      ^
In file included from test.cc:1:
In file included from /usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/vector:65:
/usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/bits/stl_construct.h:109:38: error: no matching constructor for initialization of 'Foo'
    { ::new(static_cast<void*>(__p)) _Tp(std::forward<_Args>(__args)...); }
                                     ^   ~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/bits/stl_uninitialized.h:91:8: note: in instantiation of function template specialization 'std::_Construct<Foo, Foo>' requested here
                std::_Construct(std::__addressof(*__cur), *__first);
                     ^
/usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/bits/stl_uninitialized.h:150:2: note: in instantiation of function template specialization 'std::__uninitialized_copy<false>::__uninit_copy<std::move_iterator<Foo *>, Foo *>' requested here
        __uninit_copy(__first, __last, __result);
        ^
/usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/bits/stl_uninitialized.h:325:19: note: in instantiation of function template specialization 'std::uninitialized_copy<std::move_iterator<Foo *>, Foo *>' requested here
    { return std::uninitialized_copy(__first, __last, __result); }
                  ^
/usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/bits/stl_uninitialized.h:346:19: note: in instantiation of function template specialization 'std::__uninitialized_copy_a<std::move_iterator<Foo *>, Foo *, Foo>' requested here
      return std::__uninitialized_copy_a
                  ^
/usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/bits/vector.tcc:473:10: note: in instantiation of function template specialization 'std::__uninitialized_move_if_noexcept_a<Foo *, Foo *, std::allocator<Foo>>' requested here
                = std::__uninitialized_move_if_noexcept_a
                       ^
/usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/bits/vector.tcc:121:4: note: in instantiation of function template specialization 'std::vector<Foo, std::allocator<Foo>>::_M_realloc_insert<>' requested here
          _M_realloc_insert(end(), std::forward<_Args>(__args)...);
          ^
test.cc:10:7: note: in instantiation of function template specialization 'std::vector<Foo, std::allocator<Foo>>::emplace_back<>' requested here
  vec.emplace_back();
      ^
test.cc:5:3: note: candidate constructor not viable: expects an l-value for 1st argument
  Foo(Foo&) = delete;
  ^
3 errors generated.