[Bug c++/100796] [11 Regression] GCC does not honor #pragma diagnostic ignored when using the integrated preprocessor

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100796

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This is not a 11 Regression, since it's exactly the same as previous releases,
isn't it?

I think it's a dup of PR 53431