[Bug c++/104266] Temporaries with protected destructor are erroneously permitted

[de34 at live dot cn]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104266

Jiang An <de34 at live dot cn> changed:

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--- Comment #1 from Jiang An <de34 at live dot cn> ---
I think this is CWG DR 2227 (https://wg21.link/cwg2227).

And IIUC although it is correct to reject this code, clang's error message is
wrong, because there's no temporary of type 'A' created due to guaranteed RVO
since C++17.