[Bug c++/87063] Const subobject with const assignment operator, but operator anyway deleted

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87063

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
EDG also rejects this:
```
"<source>", line 21: error: function "foo::operator=(const foo &)" (declared
implicitly) cannot be referenced -- it is a deleted function
      a = foo();
        ^
```


I remember there being a defect report in this area too.