https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100399 Bug 100399 depends on bug 100370, which changed state.
Bug 100370 Summary: [11 Regression] Incorrect -Wplacement-new with union https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100370 What |Removed |Added ---------------------------------------------------------------------------- Status|ASSIGNED |RESOLVED Resolution|--- |FIXED