https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68903
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> --- Seems fixed on trunk; maybe by the fix for PR 98744.
[Bug c++/68903] missing default initialization of member when combined with virtual inheritance
pinskia at gcc dot gnu.org via Gcc-bugs Tue, 10 Aug 2021 09:36:18 -0700
