https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111097
Richard Biener <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED Resolution|--- |INVALID --- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> --- Try -fno-strict-aliasing. XV doesn't inter-operate with uint32_t which you use in printSome to access the values stored via an lvalue of type XV.