https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113204
--- Comment #11 from Sam James <sjames at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #4)
> the non-presence of n{1,2}->lto_file_data represented as -1 makes whether
> non-presence is first dependent on the value of the order of the other.
>
That might explain why it's such a pain to try isolate it, actually.
