https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63426 Bug 63426 depends on bug 85158, which changed state.
Bug 85158 Summary: ubsan and -O3 finds a problem https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85158 What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution|--- |DUPLICATE