[Bug bootstrap/103306] [12 Regression] parallel build hangs since r12-5234-g04c5a9 when /usr/include includes broken symbolic links

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103306

--- Comment #14 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
No matter what, IMO assertions or aborts should be for bugs in the tool
(fixincl in this case), something that shouldn't happen if the tool doesn't
have bugs, while errors or possibly ignored errors should be for the case where
the bug is outside of the tool like in this case.  And, for a tool like
fixincl, the big question is if it should be a fatal error or just warning or
non-fatal error, something the tool can survive and continue with next header.