https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85248
--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> --- I think we want to merge the cgraph nodes but _not_ merge decls (thus not call lto_symtab_prevail_decl). Iff that is supported somehow...? Probably we expect the decl <-> cgraph node be a 1:1 relation, not a n:1 one. I think the issue you run into can happen generally, no? Or we indeed do not reclaim the mpx stuff properly. Anyhow, I guess you need to debug the specific ICE further or reduce the scope of "flags" you bail out for now to that of the error() case (noreturn).
