https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121636
--- Comment #7 from Huiba Li <huiba....@alibaba-inc.com> ---
> ```
> struct A {
> A(int, int = 0);
> A(int, int, int = 0) = delete;
> };
> struct B : A {
> using A::A;
> };
> B b(1);
>
> ```
>
> This is rejected by GCC and EDG while accepted by clang/msvc.
As a user of C++, I'd say I'm surprised to see the rejection, and then confused
by the reason given in the error message.
