[Bug lto/88147] [9 Regression] ICE in linemap_line_start, at libcpp/line-map.c:781 starting from r265875

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88147

--- Comment #6 from Martin Liška <marxin at gcc dot gnu.org> ---
David can you please help us with that? Would it be possible to write a
sanitization patch will catch an overflow?