https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91225
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> --- This is/was documented as a way to get rid of uninitialized warnings. So if this changes, please change the documentation too. Also -Wself-init should cause the initialized warnings to come back. Note I implemented that option which is why I know some of the history around it. Note also there is another bug requesting the option be enabled by default too.