https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87733
Segher Boessenkool <segher at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Last reconfirmed| |2018-12-06 Ever confirmed|0 |1 --- Comment #3 from Segher Boessenkool <segher at gcc dot gnu.org> --- It fails on everything at least as far back as GCC 5. So it is not a regression. I'd say we don't backport your changes, given how hard it is to get it right, and no doubt it will need changes to backport, too.