https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109720
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> --- (In reply to Paul Smith from comment #1) > Hm, maybe it's due to the union. Maybe GCC can't grok that we ensure that > we only use the dynamic_bitset leg of the union after we've initialized it? Once we get the preprocessed source, it should be easy to figure out why the warning is showing up and if it is related to unions or something else.
