https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86554
--- Comment #6 from Bill Schmidt <wschmidt at gcc dot gnu.org> --- Anton has been able to work around the problem with a source change (this code is unnecessarily baroque anyway), so I don't think anybody is urgently awaiting a fix. If this will be fixed in your eventual rewrite of FRE, I think that's more than sufficient. Thanks!