https://gcc.gnu.org/bugzilla/show_bug.cgi?id=22197
Richard Biener <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution|--- |INVALID --- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> --- Clearly the warning is correct, a copy is a use, you do not initialize testvar.unusedval but use it when assigning testvar to testarray[0].