[Bug c++/96063] [10/11 Regression] mismatched-tags warnings in stdlib headers

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96063

--- Comment #10 from Jonathan Wakely <redi at gcc dot gnu.org> ---
What's wrong with checking the return value of warning_at as in the patch in
comment 8?