rvalue references "not accessible" in Locals and Watchers

1. Open project tests\manual\debugger\simple\simple.pro from Creator's repository and configure it to use a MinGW-based kit.
2. Set a breakpoint in function void testRValueReference() and let the debugger run there:

       struct X { X() : a(2), b(3) {} int a, b; };
   
       X testRValueReferenceHelper1()
       {
           return X();
       }
   
       X testRValueReferenceHelper2(X &&x)
       {
           return x;
       }
   
       void testRValueReference()
       {
           X &&x1 = testRValueReferenceHelper1();
           X &&x2 = testRValueReferenceHelper2(std::move(x1));
           X &&x3 = testRValueReferenceHelper2(testRValueReferenceHelper1());
   
           X y1 = testRValueReferenceHelper1();
           X y2 = testRValueReferenceHelper2(std::move(y1));
           X y3 = testRValueReferenceHelper2(testRValueReferenceHelper1());
   
           BREAK_HERE;
           // Continue.
           dummyStatement(&x1, &x2, &x3, &y1, &y2, &y3);
       }
   

3. See the values for x1, x2 and x3 in Locals and Expressions view.
   They are all displayed as "not accessible".

As far as I understand C++11 these are valid references and the value they are referencing should be displayed.