[Bug preprocessor/117166] [15 regression] ICE when building lxml-5.3.0 with LTO (linemap_line_start, at libcpp/line-map.cc:949)

[sjames at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117166

--- Comment #6 from Sam James <sjames at gcc dot gnu.org> ---
(Not forgot about this, will come back to it soon, just reproducing it is
slow.)