[Bug ipa/65298] [5 Regression] lto1: ICE: in operator[], at vec.h:736 during LTO/PGO Firefox build

[trippels at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65298

--- Comment #3 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
ix=1 and m_vecpfx.m_num=1 in this case.
Let me know what other debugging info may be useful to you.