An rvalue reference cannot bind to an lvalue, so static_cast the result of the __tuple_leaf::get() call to an rvalue reference when returning from tuple's get(). git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@124190 91177308-0d34-0410-b5e6-96231b3b80d8 
diff --git a/include/tuple b/include/tuple index 8c3e1c4..3f67ff8 100644 --- a/include/tuple +++ b/include/tuple 
@@ -589,7 +589,8 @@  get(tuple<_Tp...>&& __t)  {  typedef typename tuple_element<_Ip, tuple<_Tp...> >::type type; - return static_cast<__tuple_leaf<_Ip, type>&&>(__t.base_).get(); + return static_cast<typename tuple_element<_Ip, tuple<_Tp...> >::type&&>( + static_cast<__tuple_leaf<_Ip, type>&&>(__t.base_).get());  }    // tie