[Bug pch/112319] [14 Regression] segfault with pch and #pragma GCC diagnostic

[lhyatt at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112319

--- Comment #2 from Lewis Hyatt <lhyatt at gcc dot gnu.org> ---
Patch sent for review:
https://gcc.gnu.org/pipermail/gcc-patches/2023-November/634931.html